static l_int32
GenerateSplitPlot(l_int32 i)
{
char title[256];
l_int32 split;
l_float32 ave1, ave2, num1, num2, maxnum, maxscore;
GPLOT *gplot;
NUMA *na1, *na2, *nascore, *nax, *nay;
PIX *pixs, *pixd;
/* Generate */
na1 = MakeGaussian(gaussmean1[i], gaussstdev1[i], gaussfract1[i]);
na2 = MakeGaussian(gaussmean2[i], gaussstdev1[i], 1.0 - gaussfract1[i]);
numaArithOp(na1, na1, na2, L_ARITH_ADD);
/* Otsu splitting */
numaSplitDistribution(na1, 0.08, &split, &ave1, &ave2, &num1, &num2,
&nascore);
fprintf(stderr, "split = %d, ave1 = %6.1f, ave2 = %6.1f\n",
split, ave1, ave2);
fprintf(stderr, "num1 = %8.0f, num2 = %8.0f\n", num1, num2);
/* Prepare for plotting a vertical line at the split point */
nax = numaMakeConstant(split, 2);
numaGetMax(na1, &maxnum, NULL);
nay = numaMakeConstant(0, 2);
numaReplaceNumber(nay, 1, (l_int32)(0.5 * maxnum));
/* Plot the input histogram with the split location */
sprintf(buf, "/tmp/junkplot.%d", i);
sprintf(title, "Plot %d", i);
gplot = gplotCreate(buf, GPLOT_PNG,
"Histogram: mixture of 2 gaussians",
"Grayscale value", "Number of pixels");
gplotAddPlot(gplot, NULL, na1, GPLOT_LINES, title);
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, NULL);
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&na1);
numaDestroy(&na2);
/* Plot the score function */
sprintf(buf, "/tmp/junkplots.%d", i);
sprintf(title, "Plot %d", i);
gplot = gplotCreate(buf, GPLOT_PNG,
"Otsu score function for splitting",
"Grayscale value", "Score");
gplotAddPlot(gplot, NULL, nascore, GPLOT_LINES, title);
numaGetMax(nascore, &maxscore, NULL);
numaReplaceNumber(nay, 1, maxscore);
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, NULL);
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nax);
numaDestroy(&nay);
numaDestroy(&nascore);
return 0;
}
int main(int argc,
char **argv)
{
char *filein;
l_int32 d, sigbits;
GPLOT *gplot;
NUMA *na;
PIX *pixs;
static char mainName[] = "histotest";
if (argc != 3)
return ERROR_INT(" Syntax: histotest filein sigbits", mainName, 1);
filein = argv[1];
sigbits = atoi(argv[2]);
if ((pixs = pixRead(filein)) == NULL)
return ERROR_INT("pixs not made", mainName, 1);
d = pixGetDepth(pixs);
if (d != 8 && d != 32)
return ERROR_INT("depth not 8 or 32 bpp", mainName, 1);
if (d == 32) {
startTimer();
if ((na = pixOctcubeHistogram(pixs, sigbits, NULL)) == NULL)
return ERROR_INT("na not made", mainName, 1);
fprintf(stderr, "histo time = %7.3f sec\n", stopTimer());
gplot = gplotCreate("/tmp/junkrootc", GPLOT_X11,
"color histogram with octcube indexing",
"octcube index", "number of pixels in cube");
gplotAddPlot(gplot, NULL, na, GPLOT_LINES, "input pix");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
}
else {
if ((na = pixGetGrayHistogram(pixs, 1)) == NULL)
return ERROR_INT("na not made", mainName, 1);
numaWrite("/tmp/junkna", na);
gplot = gplotCreate("/tmp/junkrootg", GPLOT_X11, "grayscale histogram",
"gray value", "number of pixels");
gplotSetScaling(gplot, GPLOT_LOG_SCALE_Y);
gplotAddPlot(gplot, NULL, na, GPLOT_LINES, "input pix");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
}
pixDestroy(&pixs);
numaDestroy(&na);
return 0;
}
/*!
* gplotSimpleXY2()
*
* Input: nax (<optional; can be NULL)
* nay1
* nay2
* outformat (GPLOT_PNG, GPLOT_PS, GPLOT_EPS, GPLOT_X11,
* GPLOT_LATEX)
* outroot (root of output files)
* title (<optional>)
* Return: 0 if OK, 1 on error
*
* Notes:
* (1) This gives line plots of @nay1 and @nay2 against nax, generated
* in the specified output format. The title is optional.
* (2) @nax is optional. If NULL, @nay1 and @nay2 are plotted
* against the array index.
* (3) When calling these simple plot functions more than once, use
* different @outroot to avoid overwriting the output files.
*/
l_int32
gplotSimpleXY2(NUMA *nax,
NUMA *nay1,
NUMA *nay2,
l_int32 outformat,
const char *outroot,
const char *title)
{
GPLOT *gplot;
PROCNAME("gplotSimpleXY2");
if (!nay1 || !nay2)
return ERROR_INT("nay1 and nay2 not both defined", procName, 1);
if (outformat != GPLOT_PNG && outformat != GPLOT_PS &&
outformat != GPLOT_EPS && outformat != GPLOT_X11 &&
outformat != GPLOT_LATEX)
return ERROR_INT("invalid outformat", procName, 1);
if (!outroot)
return ERROR_INT("outroot not specified", procName, 1);
if ((gplot = gplotCreate(outroot, outformat, title, NULL, NULL)) == 0)
return ERROR_INT("gplot not made", procName, 1);
gplotAddPlot(gplot, nax, nay1, GPLOT_LINES, NULL);
gplotAddPlot(gplot, nax, nay2, GPLOT_LINES, NULL);
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
return 0;
}
/*!
* gplotSimpleXYN()
*
* Input: nax (<optional>; can be NULL)
* naay (numaa of arrays to plot against @nax)
* outformat (GPLOT_PNG, GPLOT_PS, GPLOT_EPS, GPLOT_X11,
* GPLOT_LATEX)
* outroot (root of output files)
* title (<optional>)
* Return: 0 if OK, 1 on error
*
* Notes:
* (1) This gives line plots of each Numa in @naa against nax,
* generated in the specified output format. The title is optional.
* (2) @nax is optional. If NULL, each Numa array is plotted against
* the array index.
* (3) When calling these simple plot functions more than once, use
* different @outroot to avoid overwriting the output files.
*/
l_int32
gplotSimpleXYN(NUMA *nax,
NUMAA *naay,
l_int32 outformat,
const char *outroot,
const char *title)
{
l_int32 i, n;
GPLOT *gplot;
NUMA *nay;
PROCNAME("gplotSimpleXYN");
if (!naay)
return ERROR_INT("naay not defined", procName, 1);
if ((n = numaaGetCount(naay)) == 0)
return ERROR_INT("no numa in array", procName, 1);
if (outformat != GPLOT_PNG && outformat != GPLOT_PS &&
outformat != GPLOT_EPS && outformat != GPLOT_X11 &&
outformat != GPLOT_LATEX)
return ERROR_INT("invalid outformat", procName, 1);
if (!outroot)
return ERROR_INT("outroot not specified", procName, 1);
if ((gplot = gplotCreate(outroot, outformat, title, NULL, NULL)) == 0)
return ERROR_INT("gplot not made", procName, 1);
for (i = 0; i < n; i++) {
nay = numaaGetNuma(naay, i, L_CLONE);
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, NULL);
numaDestroy(&nay);
}
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
return 0;
}
/*!
* \brief gplotSimpleXY1()
*
* \param[in] nax [optional]
* \param[in] nay
* \param[in] plotstyle GPLOT_LINES, GPLOT_POINTS, GPLOT_IMPULSES,
* GPLOT_LINESPOINTS, GPLOT_DOTS
* \param[in] outformat GPLOT_PNG, GPLOT_PS, GPLOT_EPS, GPLOT_LATEX
* \param[in] outroot root of output files
* \param[in] title [optional], can be NULL
* \return 0 if OK, 1 on error
*
* <pre>
* Notes:
* (1) This gives a plot of a %nay vs %nax, generated in
* the specified output format. The title is optional.
* (2) Use 0 for default plotstyle (lines).
* (3) %nax is optional. If NULL, %nay is plotted against
* the array index.
* (4) When calling these simple plot functions more than once, use
* different %outroot to avoid overwriting the output files.
* </pre>
*/
l_int32
gplotSimpleXY1(NUMA *nax,
NUMA *nay,
l_int32 plotstyle,
l_int32 outformat,
const char *outroot,
const char *title)
{
GPLOT *gplot;
PROCNAME("gplotSimpleXY1");
if (!nay)
return ERROR_INT("nay not defined", procName, 1);
if (plotstyle != GPLOT_LINES && plotstyle != GPLOT_POINTS &&
plotstyle != GPLOT_IMPULSES && plotstyle != GPLOT_LINESPOINTS &&
plotstyle != GPLOT_DOTS)
return ERROR_INT("invalid plotstyle", procName, 1);
if (outformat != GPLOT_PNG && outformat != GPLOT_PS &&
outformat != GPLOT_EPS && outformat != GPLOT_LATEX)
return ERROR_INT("invalid outformat", procName, 1);
if (!outroot)
return ERROR_INT("outroot not specified", procName, 1);
if ((gplot = gplotCreate(outroot, outformat, title, NULL, NULL)) == 0)
return ERROR_INT("gplot not made", procName, 1);
gplotAddPlot(gplot, nax, nay, plotstyle, NULL);
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
return 0;
}
int main(int argc,
char **argv)
{
char *filein, *fileout;
char bigbuf[512];
l_int32 iplot, same;
l_float32 gam;
l_float64 gamma[] = {.5, 1.0, 1.5, 2.0, 2.5, -1.0};
GPLOT *gplot;
NUMA *na, *nax;
PIX *pixs, *pixd;
static char mainName[] = "gammatest";
if (argc != 4)
return ERROR_INT(" Syntax: gammatest filein gam fileout", mainName, 1);
lept_mkdir("lept/gamma");
filein = argv[1];
gam = atof(argv[2]);
fileout = argv[3];
if ((pixs = pixRead(filein)) == NULL)
return ERROR_INT("pixs not made", mainName, 1);
startTimer();
pixd = pixGammaTRC(NULL, pixs, gam, MINVAL, MAXVAL);
fprintf(stderr, "Time for gamma: %7.3f sec\n", stopTimer());
pixGammaTRC(pixs, pixs, gam, MINVAL, MAXVAL);
pixEqual(pixs, pixd, &same);
if (!same)
fprintf(stderr, "Error in pixGammaTRC!\n");
pixWrite(fileout, pixs, IFF_JFIF_JPEG);
pixDestroy(&pixs);
na = numaGammaTRC(gam, MINVAL, MAXVAL);
gplotSimple1(na, GPLOT_PNG, "/tmp/lept/gamma/trc", "gamma trc");
l_fileDisplay("/tmp/lept/gamma/trc.png", 100, 100, 1.0);
numaDestroy(&na);
/* Plot gamma TRC maps */
gplot = gplotCreate("/tmp/lept/gamma/corr", GPLOT_PNG,
"Mapping function for gamma correction",
"value in", "value out");
nax = numaMakeSequence(0.0, 1.0, 256);
for (iplot = 0; gamma[iplot] >= 0.0; iplot++) {
na = numaGammaTRC(gamma[iplot], 30, 215);
sprintf(bigbuf, "gamma = %3.1f", gamma[iplot]);
gplotAddPlot(gplot, nax, na, GPLOT_LINES, bigbuf);
numaDestroy(&na);
}
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
l_fileDisplay("/tmp/lept/gamma/corr.png", 100, 100, 1.0);
numaDestroy(&nax);
return 0;
}
int main(int argc,
char **argv)
{
char *filein, *fileout;
char bigbuf[512];
l_int32 iplot;
l_float32 factor; /* scaled width of atan curve */
l_float32 fact[] = {.2, 0.4, 0.6, 0.8, 1.0, -1.0};
GPLOT *gplot;
NUMA *na, *nax;
PIX *pixs;
static char mainName[] = "contrasttest";
if (argc != 4)
return ERROR_INT(" Syntax: contrasttest filein factor fileout",
mainName, 1);
lept_mkdir("lept/contrast");
filein = argv[1];
factor = atof(argv[2]);
fileout = argv[3];
if ((pixs = pixRead(filein)) == NULL)
return ERROR_INT("pixs not made", mainName, 1);
na = numaContrastTRC(factor);
gplotSimple1(na, GPLOT_PNG, "/tmp/lept/contrast/trc1", "contrast trc");
l_fileDisplay("/tmp/lept/contrast/trc1.png", 0, 100, 1.0);
numaDestroy(&na);
/* Plot contrast TRC maps */
nax = numaMakeSequence(0.0, 1.0, 256);
gplot = gplotCreate("/tmp/lept/contrast/trc2", GPLOT_PNG,
"Atan mapping function for contrast enhancement",
"value in", "value out");
for (iplot = 0; fact[iplot] >= 0.0; iplot++) {
na = numaContrastTRC(fact[iplot]);
sprintf(bigbuf, "factor = %3.1f", fact[iplot]);
gplotAddPlot(gplot, nax, na, GPLOT_LINES, bigbuf);
numaDestroy(&na);
}
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
l_fileDisplay("/tmp/lept/contrast/trc2.png", 600, 100, 1.0);
numaDestroy(&nax);
/* Apply the input contrast enhancement */
pixContrastTRC(pixs, pixs, factor);
pixWrite(fileout, pixs, IFF_PNG);
pixDestroy(&pixs);
return 0;
}
main(int argc,
char **argv)
{
l_int32 i, ival, n;
l_float32 f, val;
GPLOT *gplot;
NUMA *na1, *na2, *na3;
PIX *pixt;
L_REGPARAMS *rp;
if (regTestSetup(argc, argv, &rp))
return 1;
/* Generate a 1D signal and plot it */
na1 = numaCreate(500);
for (i = 0; i < 500; i++) {
f = 48.3 * sin(0.13 * (l_float32)i);
f += 63.4 * cos(0.21 * (l_float32)i);
numaAddNumber(na1, f);
}
gplot = gplotCreate("/tmp/extrema", GPLOT_PNG, "Extrema test", "x", "y");
gplotAddPlot(gplot, NULL, na1, GPLOT_LINES, "plot 1");
/* Find the local min and max and plot them */
na2 = numaFindExtrema(na1, 38.3);
n = numaGetCount(na2);
na3 = numaCreate(n);
for (i = 0; i < n; i++) {
numaGetIValue(na2, i, &ival);
numaGetFValue(na1, ival, &val);
numaAddNumber(na3, val);
}
gplotAddPlot(gplot, na2, na3, GPLOT_POINTS, "plot 2");
gplotMakeOutput(gplot);
#ifndef _WIN32
sleep(1);
#else
Sleep(1000);
#endif /* _WIN32 */
regTestCheckFile(rp, "/tmp/extrema.png"); /* 0 */
pixt = pixRead("/tmp/extrema.png");
pixDisplayWithTitle(pixt, 100, 100, "Extrema test", rp->display);
pixDestroy(&pixt);
gplotDestroy(&gplot);
numaDestroy(&na1);
numaDestroy(&na2);
numaDestroy(&na3);
return regTestCleanup(rp);
}
void numaPlot(Numa* numa, Numa* numaExtrema, Numa* numaExtrema2, l_int32 outformat, std::string plotName) {
Numa* numaYValues = numaMakeYNuma(numaExtrema, numa);
GPLOT *gplot;
std::ostringstream name;
std::ostringstream rootName;
std::ostringstream title;
rootName<<plotName<<outformat;
gplot = gplotCreate(rootName.str().c_str(), outformat, name.str().c_str(), "x", "y");
gplotAddPlot(gplot, NULL, numa, GPLOT_LINES, "numa");
gplotAddPlot(gplot, numaExtrema, numaYValues, GPLOT_IMPULSES, "extrema");
if(numaExtrema2!=NULL) {
Numa* numaYValues2 = numaMakeYNuma(numaExtrema2, numa);
gplotAddPlot(gplot, numaExtrema2, numaYValues2, GPLOT_IMPULSES, "extrema2");
numaDestroy(&numaYValues2);
}
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&numaYValues);
}
int main(int argc,
char **argv)
{
l_int32 size, i, n, n0;
BOXA *boxa;
GPLOT *gplot;
NUMA *nax, *nay1, *nay2;
PIX *pixs, *pixd;
static char mainName[] = "pixa1_reg";
if (argc != 1)
return ERROR_INT(" Syntax: pixa1_reg", mainName, 1);
if ((pixs = pixRead("feyn.tif")) == NULL)
return ERROR_INT("pixs not made", mainName, 1);
/* ---------------- Remove small components --------------- */
boxa = pixConnComp(pixs, NULL, 8);
n0 = boxaGetCount(boxa);
nax = numaMakeSequence(0, 2, 51);
nay1 = numaCreate(51);
nay2 = numaCreate(51);
boxaDestroy(&boxa);
fprintf(stderr, "\n Select Large if Both\n");
fprintf(stderr, "Iter 0: n = %d\n", n0);
numaAddNumber(nay1, n0);
for (i = 1; i <= 50; i++) {
size = 2 * i;
pixd = pixSelectBySize(pixs, size, size, CONNECTIVITY,
L_SELECT_IF_BOTH, L_SELECT_IF_GTE, NULL);
boxa = pixConnComp(pixd, NULL, 8);
n = boxaGetCount(boxa);
numaAddNumber(nay1, n);
fprintf(stderr, "Iter %d: n = %d\n", i, n);
boxaDestroy(&boxa);
pixDestroy(&pixd);
}
fprintf(stderr, "\n Select Large if Either\n");
fprintf(stderr, "Iter 0: n = %d\n", n0);
numaAddNumber(nay2, n0);
for (i = 1; i <= 50; i++) {
size = 2 * i;
pixd = pixSelectBySize(pixs, size, size, CONNECTIVITY,
L_SELECT_IF_EITHER, L_SELECT_IF_GTE, NULL);
boxa = pixConnComp(pixd, NULL, 8);
n = boxaGetCount(boxa);
numaAddNumber(nay2, n);
fprintf(stderr, "Iter %d: n = %d\n", i, n);
boxaDestroy(&boxa);
pixDestroy(&pixd);
}
gplot = gplotCreate("/tmp/junkroot1", GPLOT_X11,
"Select large: number of cc vs size removed",
"min size", "number of c.c.");
gplotAddPlot(gplot, nax, nay1, GPLOT_LINES, "select if both");
gplotAddPlot(gplot, nax, nay2, GPLOT_LINES, "select if either");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
/* ---------------- Remove large components --------------- */
numaEmpty(nay1);
numaEmpty(nay2);
fprintf(stderr, "\n Select Small if Both\n");
fprintf(stderr, "Iter 0: n = %d\n", 0);
numaAddNumber(nay1, 0);
for (i = 1; i <= 50; i++) {
size = 2 * i;
pixd = pixSelectBySize(pixs, size, size, CONNECTIVITY,
L_SELECT_IF_BOTH, L_SELECT_IF_LTE, NULL);
boxa = pixConnComp(pixd, NULL, 8);
n = boxaGetCount(boxa);
numaAddNumber(nay1, n);
fprintf(stderr, "Iter %d: n = %d\n", i, n);
boxaDestroy(&boxa);
pixDestroy(&pixd);
}
fprintf(stderr, "\n Select Small if Either\n");
fprintf(stderr, "Iter 0: n = %d\n", 0);
numaAddNumber(nay2, 0);
for (i = 1; i <= 50; i++) {
size = 2 * i;
pixd = pixSelectBySize(pixs, size, size, CONNECTIVITY,
L_SELECT_IF_EITHER, L_SELECT_IF_LTE, NULL);
boxa = pixConnComp(pixd, NULL, 8);
n = boxaGetCount(boxa);
numaAddNumber(nay2, n);
fprintf(stderr, "Iter %d: n = %d\n", i, n);
boxaDestroy(&boxa);
pixDestroy(&pixd);
}
gplot = gplotCreate("/tmp/junkroot2", GPLOT_X11,
"Remove large: number of cc vs size removed",
"min size", "number of c.c.");
gplotAddPlot(gplot, nax, nay1, GPLOT_LINES, "select if both");
gplotAddPlot(gplot, nax, nay2, GPLOT_LINES, "select if either");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nax);
numaDestroy(&nay1);
numaDestroy(&nay2);
pixDestroy(&pixs);
return 0;
}
/*!
* pixFindSkewSweep()
*
* Input: pixs (1 bpp)
* &angle (<return> angle required to deskew, in degrees)
* reduction (factor = 1, 2, 4 or 8)
* sweeprange (half the full range; assumed about 0; in degrees)
* sweepdelta (angle increment of sweep; in degrees)
* Return: 0 if OK, 1 on error or if angle measurment not valid
*
* Notes:
* (1) This examines the 'score' for skew angles with equal intervals.
* (2) Caller must check the return value for validity of the result.
*/
l_int32
pixFindSkewSweep(PIX *pixs,
l_float32 *pangle,
l_int32 reduction,
l_float32 sweeprange,
l_float32 sweepdelta)
{
l_int32 ret, bzero, i, nangles;
l_float32 deg2rad, theta;
l_float32 sum, maxscore, maxangle;
NUMA *natheta, *nascore;
PIX *pix, *pixt;
PROCNAME("pixFindSkewSweep");
if (!pixs)
return ERROR_INT("pixs not defined", procName, 1);
if (pixGetDepth(pixs) != 1)
return ERROR_INT("pixs not 1 bpp", procName, 1);
if (!pangle)
return ERROR_INT("&angle not defined", procName, 1);
if (reduction != 1 && reduction != 2 && reduction != 4 && reduction != 8)
return ERROR_INT("reduction must be in {1,2,4,8}", procName, 1);
*pangle = 0.0; /* init */
deg2rad = 3.1415926535 / 180.;
ret = 0;
/* Generate reduced image, if requested */
if (reduction == 1)
pix = pixClone(pixs);
else if (reduction == 2)
pix = pixReduceRankBinaryCascade(pixs, 1, 0, 0, 0);
else if (reduction == 4)
pix = pixReduceRankBinaryCascade(pixs, 1, 1, 0, 0);
else /* reduction == 8 */
pix = pixReduceRankBinaryCascade(pixs, 1, 1, 2, 0);
pixZero(pix, &bzero);
if (bzero) {
pixDestroy(&pix);
return 1;
}
nangles = (l_int32)((2. * sweeprange) / sweepdelta + 1);
natheta = numaCreate(nangles);
nascore = numaCreate(nangles);
pixt = pixCreateTemplate(pix);
if (!pix || !pixt) {
ret = ERROR_INT("pix and pixt not both made", procName, 1);
goto cleanup;
}
if (!natheta || !nascore) {
ret = ERROR_INT("natheta and nascore not both made", procName, 1);
goto cleanup;
}
for (i = 0; i < nangles; i++) {
theta = -sweeprange + i * sweepdelta; /* degrees */
/* Shear pix about the UL corner and put the result in pixt */
pixVShearCorner(pixt, pix, deg2rad * theta, L_BRING_IN_WHITE);
/* Get score */
pixFindDifferentialSquareSum(pixt, &sum);
#if DEBUG_PRINT_SCORES
L_INFO("sum(%7.2f) = %7.0f\n", procName, theta, sum);
#endif /* DEBUG_PRINT_SCORES */
/* Save the result in the output arrays */
numaAddNumber(nascore, sum);
numaAddNumber(natheta, theta);
}
/* Find the location of the maximum (i.e., the skew angle)
* by fitting the largest data point and its two neighbors
* to a quadratic, using lagrangian interpolation. */
numaFitMax(nascore, &maxscore, natheta, &maxangle);
*pangle = maxangle;
#if DEBUG_PRINT_SWEEP
L_INFO(" From sweep: angle = %7.3f, score = %7.3f\n", procName,
maxangle, maxscore);
#endif /* DEBUG_PRINT_SWEEP */
#if DEBUG_PLOT_SCORES
/* Plot the result -- the scores versus rotation angle --
* using gnuplot with GPLOT_LINES (lines connecting data points).
* The GPLOT data structure is first created, with the
* appropriate data incorporated from the two input NUMAs,
* and then the function gplotMakeOutput() uses gnuplot to
* generate the output plot. This can be either a .png file
* or a .ps file, depending on whether you use GPLOT_PNG
* or GPLOT_PS. */
{GPLOT *gplot;
gplot = gplotCreate("sweep_output", GPLOT_PNG,
"Sweep. Variance of difference of ON pixels vs. angle",
"angle (deg)", "score");
gplotAddPlot(gplot, natheta, nascore, GPLOT_LINES, "plot1");
gplotAddPlot(gplot, natheta, nascore, GPLOT_POINTS, "plot2");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
}
#endif /* DEBUG_PLOT_SCORES */
cleanup:
pixDestroy(&pix);
pixDestroy(&pixt);
numaDestroy(&nascore);
numaDestroy(&natheta);
return ret;
}
int main(int argc,
char **argv)
{
l_int32 i, j, w, h, same;
l_float32 t, t1, t2;
GPLOT *gplot;
NUMA *nax, *nay1, *nay2;
PIX *pixs, *pixd, *pixt1, *pixt2, *pixt3, *pixt4;
PIXA *pixa;
static char mainName[] = "rank_reg";
if (argc != 1)
return ERROR_INT(" Syntax: rank_reg", mainName, 1);
if ((pixs = pixRead("lucasta.150.jpg")) == NULL)
return ERROR_INT("pixs not made", mainName, 1);
pixGetDimensions(pixs, &w, &h, NULL);
startTimer();
pixd = pixRankFilterGray(pixs, 15, 15, 0.4);
t = stopTimer();
fprintf(stderr, "Time = %7.3f sec\n", t);
fprintf(stderr, "MPix/sec: %7.3f\n", 0.000001 * w * h / t);
pixDisplay(pixs, 0, 200);
pixDisplay(pixd, 600, 200);
pixWrite("/tmp/filter.png", pixd, IFF_PNG);
pixDestroy(&pixd);
/* Get results for dilation */
startTimer();
pixt1 = pixDilateGray(pixs, 15, 15);
t = stopTimer();
fprintf(stderr, "Dilation time = %7.3f sec\n", t);
/* Get results for erosion */
pixt2 = pixErodeGray(pixs, 15, 15);
/* Get results using the rank filter for rank = 0.0 and 1.0.
* Don't use 0.0 or 1.0, because those are dispatched
* automatically to erosion and dilation! */
pixt3 = pixRankFilterGray(pixs, 15, 15, 0.0001);
pixt4 = pixRankFilterGray(pixs, 15, 15, 0.9999);
/* Compare */
pixEqual(pixt1, pixt4, &same);
if (same)
fprintf(stderr, "Correct: dilation results same as rank 1.0\n");
else
fprintf(stderr, "Error: dilation results differ from rank 1.0\n");
pixEqual(pixt2, pixt3, &same);
if (same)
fprintf(stderr, "Correct: erosion results same as rank 0.0\n");
else
fprintf(stderr, "Error: erosion results differ from rank 0.0\n");
pixDestroy(&pixt1);
pixDestroy(&pixt2);
pixDestroy(&pixt3);
pixDestroy(&pixt4);
fprintf(stderr, "\n----------------------------------------\n");
fprintf(stderr, "The next part takes about 30 seconds\n");
fprintf(stderr, "----------------------------------------\n\n");
nax = numaMakeSequence(1, 1, SIZE);
nay1 = numaCreate(SIZE);
nay2 = numaCreate(SIZE);
gplot = gplotCreate("/tmp/rankroot", GPLOT_X11, "sec/MPix vs filter size",
"size", "time");
for (i = 1; i <= SIZE; i++) {
t1 = t2 = 0.0;
for (j = 0; j < 5; j++) {
startTimer();
pixt1 = pixRankFilterGray(pixs, i, SIZE + 1, 0.5);
t1 += stopTimer();
pixDestroy(&pixt1);
startTimer();
pixt1 = pixRankFilterGray(pixs, SIZE + 1, i, 0.5);
t2 += stopTimer();
if (j == 0)
pixDisplayWrite(pixt1, 1);
pixDestroy(&pixt1);
}
numaAddNumber(nay1, 1000000. * t1 / (5. * w * h));
numaAddNumber(nay2, 1000000. * t2 / (5. * w * h));
}
gplotAddPlot(gplot, nax, nay1, GPLOT_LINES, "vertical");
gplotAddPlot(gplot, nax, nay2, GPLOT_LINES, "horizontal");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
/* Display tiled */
pixa = pixaReadFiles("/tmp/display", "file");
pixd = pixaDisplayTiledAndScaled(pixa, 8, 250, 5, 0, 25, 2);
pixWrite("/tmp/tiles.jpg", pixd, IFF_JFIF_JPEG);
pixDestroy(&pixd);
pixaDestroy(&pixa);
pixDestroy(&pixs);
pixDisplayWrite(NULL, -1); /* clear out */
pixs = pixRead("test8.jpg");
for (i = 1; i <= 4; i++) {
pixt1 = pixScaleGrayRank2(pixs, i);
pixDisplay(pixt1, 300 * (i - 1), 100);
pixDestroy(&pixt1);
}
pixDestroy(&pixs);
pixs = pixRead("test24.jpg");
pixt1 = pixConvertRGBToLuminance(pixs);
pixt2 = pixScale(pixt1, 1.5, 1.5);
for (i = 1; i <= 4; i++) {
for (j = 1; j <= 4; j++) {
pixt3 = pixScaleGrayRankCascade(pixt2, i, j, 0, 0);
pixDisplayWrite(pixt3, 1);
pixDestroy(&pixt3);
}
}
pixDestroy(&pixt1);
pixDestroy(&pixt2);
pixDestroy(&pixs);
pixDisplayMultiple("/tmp/display/file*");
return 0;
}
int main(int argc,
char **argv)
{
char label[512];
l_int32 rval, gval, bval, w, h, i, j, rwhite, gwhite, bwhite, count;
l_uint32 pixel;
GPLOT *gplot1, *gplot2;
NUMA *naseq, *na;
NUMAA *naa1, *naa2;
PIX *pixs, *pixt, *pixt0, *pixt1, *pixt2;
PIX *pixr, *pixg, *pixb;
PIXA *pixa;
PIXCMAP *cmap;
static char mainName[] = "colorspacetest";
if (argc != 2)
return ERROR_INT(" Syntax: colorspacetest filein", mainName, 1);
if ((pixs = pixRead(argv[1])) == NULL)
return ERROR_INT("pixs not made", mainName, 1);
/* Generate colors by sampling hue with max sat and value.
* This was used to make the color strip 19-colors.png. */
pixa = pixaCreate(19);
for (i = 0; i < 19; i++) {
convertHSVToRGB((240 * i / 18), 255, 255, &rval, &gval, &bval);
composeRGBPixel(rval, gval, bval, &pixel);
pixt1 = pixCreate(50, 100, 32);
pixSetAllArbitrary(pixt1, pixel);
pixaAddPix(pixa, pixt1, L_INSERT);
}
pixt2 = pixaDisplayTiledInRows(pixa, 32, 1100, 1.0, 0, 0, 0);
pixDisplayWrite(pixt2, 1);
pixDestroy(&pixt2);
pixaDestroy(&pixa);
/* Colorspace conversion in rgb */
pixDisplayWrite(pixs, 1);
pixt = pixConvertRGBToHSV(NULL, pixs);
pixDisplayWrite(pixt, 1);
pixConvertHSVToRGB(pixt, pixt);
pixDisplayWrite(pixt, 1);
pixDestroy(&pixt);
/* Colorspace conversion on a colormap */
pixt = pixOctreeQuantNumColors(pixs, 25, 0);
pixDisplayWrite(pixt, 1);
cmap = pixGetColormap(pixt);
pixcmapWriteStream(stderr, cmap);
pixcmapConvertRGBToHSV(cmap);
pixcmapWriteStream(stderr, cmap);
pixDisplayWrite(pixt, 1);
pixcmapConvertHSVToRGB(cmap);
pixcmapWriteStream(stderr, cmap);
pixDisplayWrite(pixt, 1);
pixDestroy(&pixt);
/* Color content extraction */
pixColorContent(pixs, 0, 0, 0, 0, &pixr, &pixg, &pixb);
pixDisplayWrite(pixr, 1);
pixDisplayWrite(pixg, 1);
pixDisplayWrite(pixb, 1);
pixDestroy(&pixr);
pixDestroy(&pixg);
pixDestroy(&pixb);
/* Color content measurement */
pixa = pixaCreate(20);
naseq = numaMakeSequence(100, 5, 20);
naa1 = numaaCreate(6);
naa2 = numaaCreate(6);
for (i = 0; i < 6; i++) {
na = numaCreate(20);
numaaAddNuma(naa1, na, L_COPY);
numaaAddNuma(naa2, na, L_INSERT);
}
pixGetDimensions(pixs, &w, &h, NULL);
for (i = 0; i < 20; i++) {
rwhite = 100 + 5 * i;
gwhite = 200 - 5 * i;
bwhite = 150;
pixt0 = pixGlobalNormRGB(NULL, pixs, rwhite, gwhite, bwhite, 255);
pixaAddPix(pixa, pixt0, L_INSERT);
pixt1 = pixColorMagnitude(pixs, rwhite, gwhite, bwhite,
L_MAX_DIFF_FROM_AVERAGE_2);
for (j = 0; j < 6; j++) {
pixt2 = pixThresholdToBinary(pixt1, 30 + 10 * j);
pixInvert(pixt2, pixt2);
pixCountPixels(pixt2, &count, NULL);
na = numaaGetNuma(naa1, j, L_CLONE);
numaAddNumber(na, (l_float32)count / (l_float32)(w * h));
numaDestroy(&na);
pixDestroy(&pixt2);
}
pixDestroy(&pixt1);
pixt1 = pixColorMagnitude(pixs, rwhite, gwhite, bwhite,
L_MAX_MIN_DIFF_FROM_2);
for (j = 0; j < 6; j++) {
pixt2 = pixThresholdToBinary(pixt1, 30 + 10 * j);
pixInvert(pixt2, pixt2);
pixCountPixels(pixt2, &count, NULL);
na = numaaGetNuma(naa2, j, L_CLONE);
numaAddNumber(na, (l_float32)count / (l_float32)(w * h));
numaDestroy(&na);
pixDestroy(&pixt2);
}
pixDestroy(&pixt1);
}
gplot1 = gplotCreate("/tmp/junkplot1", GPLOT_X11,
"Fraction with given color (diff from average)",
"white point space for red", "amount of color");
gplot2 = gplotCreate("/tmp/junkplot2", GPLOT_X11,
"Fraction with given color (min diff)",
"white point space for red", "amount of color");
for (j = 0; j < 6; j++) {
na = numaaGetNuma(naa1, j, L_CLONE);
sprintf(label, "thresh %d", 30 + 10 * j);
gplotAddPlot(gplot1, naseq, na, GPLOT_LINES, label);
numaDestroy(&na);
na = numaaGetNuma(naa2, j, L_CLONE);
gplotAddPlot(gplot2, naseq, na, GPLOT_LINES, label);
numaDestroy(&na);
}
gplotMakeOutput(gplot1);
gplotMakeOutput(gplot2);
gplotDestroy(&gplot1);
gplotDestroy(&gplot2);
pixt1 = pixaDisplayTiledAndScaled(pixa, 32, 250, 4, 0, 10, 2);
pixWrite("/tmp/junkcolormag", pixt1, IFF_PNG);
pixDisplayWithTitle(pixt1, 0, 100, "Color magnitude", 1);
pixDestroy(&pixt1);
pixaDestroy(&pixa);
numaDestroy(&naseq);
numaaDestroy(&naa1);
numaaDestroy(&naa2);
pixDisplayMultiple("/tmp/display/file*");
pixDestroy(&pixs);
return 0;
}
int main(int argc,
char **argv)
{
char *str1, *str2;
l_int32 i;
size_t size1, size2;
l_float32 x, y1, y2, pi;
GPLOT *gplot1, *gplot2, *gplot3, *gplot4, *gplot5;
NUMA *nax, *nay1, *nay2;
static char mainName[] = "plottest";
if (argc != 1)
return ERROR_INT(" Syntax: plottest", mainName, 1);
/* Generate plot data */
nax = numaCreate(0);
nay1 = numaCreate(0);
nay2 = numaCreate(0);
pi = 3.1415926535;
for (i = 0; i < 180; i++) {
x = (pi / 180.) * i;
y1 = (l_float32)sin(2.4 * x);
y2 = (l_float32)cos(2.4 * x);
numaAddNumber(nax, x);
numaAddNumber(nay1, y1);
numaAddNumber(nay2, y2);
}
/* Show the plot */
gplot1 = gplotCreate("/tmp/plotroot1", GPLOT_OUTPUT, "Example plots",
"theta", "f(theta)");
gplotAddPlot(gplot1, nax, nay1, GPLOT_STYLE, "sin (2.4 * theta)");
gplotAddPlot(gplot1, nax, nay2, GPLOT_STYLE, "cos (2.4 * theta)");
gplotMakeOutput(gplot1);
/* Also save the plot to png */
gplot1->outformat = GPLOT_PNG;
stringReplace(&gplot1->outname, "/tmp/plotroot1.png");
gplotMakeOutput(gplot1);
/* Test gplot serialization */
gplotWrite("/tmp/gplot1", gplot1);
if ((gplot2 = gplotRead("/tmp/gplot1")) == NULL)
return ERROR_INT("gplotRead failure!", mainName, 1);
gplotWrite("/tmp/gplot2", gplot2);
/* Are the two written gplot files the same? */
str1 = (char *)l_binaryRead("/tmp/gplot1", &size1);
str2 = (char *)l_binaryRead("/tmp/gplot2", &size2);
if (size1 != size2)
fprintf(stderr, "Error: size1 = %lu, size2 = %lu\n",
(unsigned long)size1, (unsigned long)size2);
else
fprintf(stderr, "Correct: size1 = size2 = %lu\n", (unsigned long)size1);
if (strcmp(str1, str2))
fprintf(stderr, "Error: str1 != str2\n");
else
fprintf(stderr, "Correct: str1 == str2\n");
lept_free(str1);
lept_free(str2);
/* Read from file and regenerate the plot */
gplot3 = gplotRead("/tmp/gplot2");
stringReplace(&gplot3->title , "Example plots regen");
gplot3->outformat = GPLOT_X11;
gplotMakeOutput(gplot3);
/* Build gplot but do not make the output formatted stuff */
gplot4 = gplotCreate("/tmp/plotroot2", GPLOT_OUTPUT, "Example plots 2",
"theta", "f(theta)");
gplotAddPlot(gplot4, nax, nay1, GPLOT_STYLE, "sin (2.4 * theta)");
gplotAddPlot(gplot4, nax, nay2, GPLOT_STYLE, "cos (2.4 * theta)");
/* Write, read back, and generate the plot */
gplotWrite("/tmp/gplot4", gplot4);
if ((gplot5 = gplotRead("/tmp/gplot4")) == NULL)
return ERROR_INT("gplotRead failure!", mainName, 1);
gplotMakeOutput(gplot5);
gplotDestroy(&gplot1);
gplotDestroy(&gplot2);
gplotDestroy(&gplot3);
gplotDestroy(&gplot4);
gplotDestroy(&gplot5);
numaDestroy(&nax);
numaDestroy(&nay1);
numaDestroy(&nay2);
return 0;
}
/*!
* \brief pixThresholdByConnComp()
*
* \param[in] pixs depth > 1, colormap OK
* \param[in] pixm [optional] 1 bpp mask giving region to ignore by setting
* pixels to white; use NULL if no mask
* \param[in] start, end, incr binarization threshold levels to test
* \param[in] thresh48 threshold on normalized difference between the
* numbers of 4 and 8 connected components
* \param[in] threshdiff threshold on normalized difference between the
* number of 4 cc at successive iterations
* \param[out] pglobthresh [optional] best global threshold; 0
* if no threshold is found
* \param[out] ppixd [optional] image thresholded to binary, or
* null if no threshold is found
* \param[in] debugflag 1 for plotted results
* \return 0 if OK, 1 on error or if no threshold is found
*
* <pre>
* Notes:
* (1) This finds a global threshold based on connected components.
* Although slow, it is reasonable to use it in a situation where
* (a) the background in the image is relatively uniform, and
* (b) the result will be fed to an OCR program that accepts 1 bpp
* images and works best with easily segmented characters.
* The reason for (b) is that this selects a threshold with a
* minimum number of both broken characters and merged characters.
* (2) If the pix has color, it is converted to gray using the
* max component.
* (3) Input 0 to use default values for any of these inputs:
* %start, %end, %incr, %thresh48, %threshdiff.
* (4) This approach can be understood as follows. When the
* binarization threshold is varied, the numbers of c.c. identify
* four regimes:
* (a) For low thresholds, text is broken into small pieces, and
* the number of c.c. is large, with the 4 c.c. significantly
* exceeding the 8 c.c.
* (b) As the threshold rises toward the optimum value, the text
* characters coalesce and there is very little difference
* between the numbers of 4 and 8 c.c, which both go
* through a minimum.
* (c) Above this, the image background gets noisy because some
* pixels are(thresholded to foreground, and the numbers
* of c.c. quickly increase, with the 4 c.c. significantly
* larger than the 8 c.c.
* (d) At even higher thresholds, the image background noise
* coalesces as it becomes mostly foreground, and the
* number of c.c. drops quickly.
* (5) If there is no global threshold that distinguishes foreground
* text from background (e.g., weak text over a background that
* has significant variation and/or bleedthrough), this returns 1,
* which the caller should check.
* </pre>
*/
l_int32
pixThresholdByConnComp(PIX *pixs,
PIX *pixm,
l_int32 start,
l_int32 end,
l_int32 incr,
l_float32 thresh48,
l_float32 threshdiff,
l_int32 *pglobthresh,
PIX **ppixd,
l_int32 debugflag)
{
l_int32 i, thresh, n, n4, n8, mincounts, found, globthresh;
l_float32 count4, count8, firstcount4, prevcount4, diff48, diff4;
GPLOT *gplot;
NUMA *na4, *na8;
PIX *pix1, *pix2, *pix3;
PROCNAME("pixThresholdByConnComp");
if (pglobthresh) *pglobthresh = 0;
if (ppixd) *ppixd = NULL;
if (!pixs || pixGetDepth(pixs) == 1)
return ERROR_INT("pixs undefined or 1 bpp", procName, 1);
if (pixm && pixGetDepth(pixm) != 1)
return ERROR_INT("pixm must be 1 bpp", procName, 1);
/* Assign default values if requested */
if (start <= 0) start = 80;
if (end <= 0) end = 200;
if (incr <= 0) incr = 10;
if (thresh48 <= 0.0) thresh48 = 0.01;
if (threshdiff <= 0.0) threshdiff = 0.01;
if (start > end)
return ERROR_INT("invalid start,end", procName, 1);
/* Make 8 bpp, using the max component if color. */
if (pixGetColormap(pixs))
pix1 = pixRemoveColormap(pixs, REMOVE_CMAP_BASED_ON_SRC);
else
pix1 = pixClone(pixs);
if (pixGetDepth(pix1) == 32)
pix2 = pixConvertRGBToGrayMinMax(pix1, L_CHOOSE_MAX);
else
pix2 = pixConvertTo8(pix1, 0);
pixDestroy(&pix1);
/* Mask out any non-text regions. Do this in-place, because pix2
* can never be the same pix as pixs. */
if (pixm)
pixSetMasked(pix2, pixm, 255);
/* Make sure there are enough components to get a valid signal */
pix3 = pixConvertTo1(pix2, start);
pixCountConnComp(pix3, 4, &n4);
pixDestroy(&pix3);
mincounts = 500;
if (n4 < mincounts) {
L_INFO("Insufficient component count: %d\n", procName, n4);
pixDestroy(&pix2);
return 1;
}
/* Compute the c.c. data */
na4 = numaCreate(0);
na8 = numaCreate(0);
numaSetParameters(na4, start, incr);
numaSetParameters(na8, start, incr);
for (thresh = start, i = 0; thresh <= end; thresh += incr, i++) {
pix3 = pixConvertTo1(pix2, thresh);
pixCountConnComp(pix3, 4, &n4);
pixCountConnComp(pix3, 8, &n8);
numaAddNumber(na4, n4);
numaAddNumber(na8, n8);
pixDestroy(&pix3);
}
if (debugflag) {
gplot = gplotCreate("/tmp/threshroot", GPLOT_PNG,
"number of cc vs. threshold",
"threshold", "number of cc");
gplotAddPlot(gplot, NULL, na4, GPLOT_LINES, "plot 4cc");
gplotAddPlot(gplot, NULL, na8, GPLOT_LINES, "plot 8cc");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
}
n = numaGetCount(na4);
found = FALSE;
for (i = 0; i < n; i++) {
if (i == 0) {
numaGetFValue(na4, i, &firstcount4);
prevcount4 = firstcount4;
} else {
numaGetFValue(na4, i, &count4);
numaGetFValue(na8, i, &count8);
diff48 = (count4 - count8) / firstcount4;
diff4 = L_ABS(prevcount4 - count4) / firstcount4;
if (debugflag) {
fprintf(stderr, "diff48 = %7.3f, diff4 = %7.3f\n",
diff48, diff4);
}
if (diff48 < thresh48 && diff4 < threshdiff) {
found = TRUE;
break;
}
prevcount4 = count4;
}
}
numaDestroy(&na4);
numaDestroy(&na8);
if (found) {
globthresh = start + i * incr;
if (pglobthresh) *pglobthresh = globthresh;
if (ppixd) {
*ppixd = pixConvertTo1(pix2, globthresh);
pixCopyResolution(*ppixd, pixs);
}
if (debugflag) fprintf(stderr, "global threshold = %d\n", globthresh);
pixDestroy(&pix2);
return 0;
}
if (debugflag) fprintf(stderr, "no global threshold found\n");
pixDestroy(&pix2);
return 1;
}
main(int argc,
char **argv)
{
char *filein, *fileout;
char bigbuf[512];
l_int32 iplot;
l_float32 factor; /* scaled width of atan curve */
l_float32 fact[NPLOTS] = {.2, 0.4, 0.6, 0.8, 1.0};
GPLOT *gplot;
NUMA *na, *nax;
PIX *pixs, *pixd;
static char mainName[] = "contrasttest";
if (argc != 4)
return ERROR_INT(" Syntax: contrasttest filein factor fileout",
mainName, 1);
filein = argv[1];
factor = atof(argv[2]);
fileout = argv[3];
if ((pixs = pixRead(filein)) == NULL)
return ERROR_INT("pixs not made", mainName, 1);
#if 0
startTimer();
pixContrastTRC(pixs, pixs, factor);
fprintf(stderr, "Time for contrast: %7.3f sec\n", stopTimer());
pixWrite(fileout, pixs, IFF_JFIF_JPEG);
pixDestroy(&pixs);
#endif
#if 0
startTimer();
pixd = pixContrastTRC(NULL, pixs, factor);
fprintf(stderr, "Time for contrast: %7.3f sec\n", stopTimer());
pixWrite(fileout, pixd, IFF_JFIF_JPEG);
pixDestroy(&pixs);
pixDestroy(&pixd);
#endif
na = numaContrastTRC(factor);
gplotSimple1(na, GPLOT_X11, "junkroot", "contrast trc");
numaDestroy(&na);
#if 1 /* plot contrast TRC maps */
nax = numaMakeSequence(0.0, 1.0, 256);
gplot = gplotCreate("junkmap", GPLOT_X11,
"Atan mapping function for contrast enhancement",
"value in", "value out");
for (iplot = 0; iplot < NPLOTS; iplot++) {
na = numaContrastTRC(fact[iplot]);
sprintf(bigbuf, "factor = %3.1f", fact[iplot]);
gplotAddPlot(gplot, nax, na, GPLOT_LINES, bigbuf);
numaDestroy(&na);
}
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nax);
#endif
return 0;
}
/*!
* pixFindSkewSweepAndSearchScorePivot()
*
* Input: pixs (1 bpp)
* &angle (<return> angle required to deskew; in degrees)
* &conf (<return> confidence given by ratio of max/min score)
* &endscore (<optional return> max score; use NULL to ignore)
* redsweep (sweep reduction factor = 1, 2, 4 or 8)
* redsearch (binary search reduction factor = 1, 2, 4 or 8;
* and must not exceed redsweep)
* sweepcenter (angle about which sweep is performed; in degrees)
* sweeprange (half the full range, taken about sweepcenter;
* in degrees)
* sweepdelta (angle increment of sweep; in degrees)
* minbsdelta (min binary search increment angle; in degrees)
* pivot (L_SHEAR_ABOUT_CORNER, L_SHEAR_ABOUT_CENTER)
* Return: 0 if OK, 1 on error or if angle measurment not valid
*
* Notes:
* (1) See notes in pixFindSkewSweepAndSearchScore().
* (2) This allows choice of shear pivoting from either the UL corner
* or the center. For small angles, the ability to discriminate
* angles is better with shearing from the UL corner. However,
* for large angles (say, greater than 20 degrees), it is better
* to shear about the center because a shear from the UL corner
* loses too much of the image.
*/
l_int32
pixFindSkewSweepAndSearchScorePivot(PIX *pixs,
l_float32 *pangle,
l_float32 *pconf,
l_float32 *pendscore,
l_int32 redsweep,
l_int32 redsearch,
l_float32 sweepcenter,
l_float32 sweeprange,
l_float32 sweepdelta,
l_float32 minbsdelta,
l_int32 pivot)
{
l_int32 ret, bzero, i, nangles, n, ratio, maxindex, minloc;
l_int32 width, height;
l_float32 deg2rad, theta, delta;
l_float32 sum, maxscore, maxangle;
l_float32 centerangle, leftcenterangle, rightcenterangle;
l_float32 lefttemp, righttemp;
l_float32 bsearchscore[5];
l_float32 minscore, minthresh;
l_float32 rangeleft;
NUMA *natheta, *nascore;
PIX *pixsw, *pixsch, *pixt1, *pixt2;
PROCNAME("pixFindSkewSweepAndSearchScorePivot");
if (!pixs)
return ERROR_INT("pixs not defined", procName, 1);
if (pixGetDepth(pixs) != 1)
return ERROR_INT("pixs not 1 bpp", procName, 1);
if (!pangle)
return ERROR_INT("&angle not defined", procName, 1);
if (!pconf)
return ERROR_INT("&conf not defined", procName, 1);
if (redsweep != 1 && redsweep != 2 && redsweep != 4 && redsweep != 8)
return ERROR_INT("redsweep must be in {1,2,4,8}", procName, 1);
if (redsearch != 1 && redsearch != 2 && redsearch != 4 && redsearch != 8)
return ERROR_INT("redsearch must be in {1,2,4,8}", procName, 1);
if (redsearch > redsweep)
return ERROR_INT("redsearch must not exceed redsweep", procName, 1);
if (pivot != L_SHEAR_ABOUT_CORNER && pivot != L_SHEAR_ABOUT_CENTER)
return ERROR_INT("invalid pivot", procName, 1);
*pangle = 0.0;
*pconf = 0.0;
deg2rad = 3.1415926535 / 180.;
ret = 0;
/* Generate reduced image for binary search, if requested */
if (redsearch == 1)
pixsch = pixClone(pixs);
else if (redsearch == 2)
pixsch = pixReduceRankBinaryCascade(pixs, 1, 0, 0, 0);
else if (redsearch == 4)
pixsch = pixReduceRankBinaryCascade(pixs, 1, 1, 0, 0);
else /* redsearch == 8 */
pixsch = pixReduceRankBinaryCascade(pixs, 1, 1, 2, 0);
pixZero(pixsch, &bzero);
if (bzero) {
pixDestroy(&pixsch);
return 1;
}
/* Generate reduced image for sweep, if requested */
ratio = redsweep / redsearch;
if (ratio == 1) {
pixsw = pixClone(pixsch);
} else { /* ratio > 1 */
if (ratio == 2)
pixsw = pixReduceRankBinaryCascade(pixsch, 1, 0, 0, 0);
else if (ratio == 4)
pixsw = pixReduceRankBinaryCascade(pixsch, 1, 2, 0, 0);
else /* ratio == 8 */
pixsw = pixReduceRankBinaryCascade(pixsch, 1, 2, 2, 0);
}
pixt1 = pixCreateTemplate(pixsw);
if (ratio == 1)
pixt2 = pixClone(pixt1);
else
pixt2 = pixCreateTemplate(pixsch);
nangles = (l_int32)((2. * sweeprange) / sweepdelta + 1);
natheta = numaCreate(nangles);
nascore = numaCreate(nangles);
if (!pixsch || !pixsw) {
ret = ERROR_INT("pixsch and pixsw not both made", procName, 1);
goto cleanup;
}
if (!pixt1 || !pixt2) {
ret = ERROR_INT("pixt1 and pixt2 not both made", procName, 1);
goto cleanup;
}
if (!natheta || !nascore) {
ret = ERROR_INT("natheta and nascore not both made", procName, 1);
goto cleanup;
}
/* Do sweep */
rangeleft = sweepcenter - sweeprange;
for (i = 0; i < nangles; i++) {
theta = rangeleft + i * sweepdelta; /* degrees */
/* Shear pix and put the result in pixt1 */
if (pivot == L_SHEAR_ABOUT_CORNER)
pixVShearCorner(pixt1, pixsw, deg2rad * theta, L_BRING_IN_WHITE);
else
pixVShearCenter(pixt1, pixsw, deg2rad * theta, L_BRING_IN_WHITE);
/* Get score */
pixFindDifferentialSquareSum(pixt1, &sum);
#if DEBUG_PRINT_SCORES
L_INFO("sum(%7.2f) = %7.0f\n", procName, theta, sum);
#endif /* DEBUG_PRINT_SCORES */
/* Save the result in the output arrays */
numaAddNumber(nascore, sum);
numaAddNumber(natheta, theta);
}
/* Find the largest of the set (maxscore at maxangle) */
numaGetMax(nascore, &maxscore, &maxindex);
numaGetFValue(natheta, maxindex, &maxangle);
#if DEBUG_PRINT_SWEEP
L_INFO(" From sweep: angle = %7.3f, score = %7.3f\n", procName,
maxangle, maxscore);
#endif /* DEBUG_PRINT_SWEEP */
#if DEBUG_PLOT_SCORES
/* Plot the sweep result -- the scores versus rotation angle --
* using gnuplot with GPLOT_LINES (lines connecting data points). */
{GPLOT *gplot;
gplot = gplotCreate("sweep_output", GPLOT_PNG,
"Sweep. Variance of difference of ON pixels vs. angle",
"angle (deg)", "score");
gplotAddPlot(gplot, natheta, nascore, GPLOT_LINES, "plot1");
gplotAddPlot(gplot, natheta, nascore, GPLOT_POINTS, "plot2");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
}
#endif /* DEBUG_PLOT_SCORES */
/* Check if the max is at the end of the sweep. */
n = numaGetCount(natheta);
if (maxindex == 0 || maxindex == n - 1) {
L_WARNING("max found at sweep edge\n", procName);
goto cleanup;
}
/* Empty the numas for re-use */
numaEmpty(nascore);
numaEmpty(natheta);
/* Do binary search to find skew angle.
* First, set up initial three points. */
centerangle = maxangle;
if (pivot == L_SHEAR_ABOUT_CORNER) {
pixVShearCorner(pixt2, pixsch, deg2rad * centerangle, L_BRING_IN_WHITE);
pixFindDifferentialSquareSum(pixt2, &bsearchscore[2]);
pixVShearCorner(pixt2, pixsch, deg2rad * (centerangle - sweepdelta),
L_BRING_IN_WHITE);
pixFindDifferentialSquareSum(pixt2, &bsearchscore[0]);
pixVShearCorner(pixt2, pixsch, deg2rad * (centerangle + sweepdelta),
L_BRING_IN_WHITE);
pixFindDifferentialSquareSum(pixt2, &bsearchscore[4]);
} else {
pixVShearCenter(pixt2, pixsch, deg2rad * centerangle, L_BRING_IN_WHITE);
pixFindDifferentialSquareSum(pixt2, &bsearchscore[2]);
pixVShearCenter(pixt2, pixsch, deg2rad * (centerangle - sweepdelta),
L_BRING_IN_WHITE);
pixFindDifferentialSquareSum(pixt2, &bsearchscore[0]);
pixVShearCenter(pixt2, pixsch, deg2rad * (centerangle + sweepdelta),
L_BRING_IN_WHITE);
pixFindDifferentialSquareSum(pixt2, &bsearchscore[4]);
}
numaAddNumber(nascore, bsearchscore[2]);
numaAddNumber(natheta, centerangle);
numaAddNumber(nascore, bsearchscore[0]);
numaAddNumber(natheta, centerangle - sweepdelta);
numaAddNumber(nascore, bsearchscore[4]);
numaAddNumber(natheta, centerangle + sweepdelta);
/* Start the search */
delta = 0.5 * sweepdelta;
while (delta >= minbsdelta)
{
/* Get the left intermediate score */
leftcenterangle = centerangle - delta;
if (pivot == L_SHEAR_ABOUT_CORNER)
pixVShearCorner(pixt2, pixsch, deg2rad * leftcenterangle,
L_BRING_IN_WHITE);
else
pixVShearCenter(pixt2, pixsch, deg2rad * leftcenterangle,
L_BRING_IN_WHITE);
pixFindDifferentialSquareSum(pixt2, &bsearchscore[1]);
numaAddNumber(nascore, bsearchscore[1]);
numaAddNumber(natheta, leftcenterangle);
/* Get the right intermediate score */
rightcenterangle = centerangle + delta;
if (pivot == L_SHEAR_ABOUT_CORNER)
pixVShearCorner(pixt2, pixsch, deg2rad * rightcenterangle,
L_BRING_IN_WHITE);
else
pixVShearCenter(pixt2, pixsch, deg2rad * rightcenterangle,
L_BRING_IN_WHITE);
pixFindDifferentialSquareSum(pixt2, &bsearchscore[3]);
numaAddNumber(nascore, bsearchscore[3]);
numaAddNumber(natheta, rightcenterangle);
/* Find the maximum of the five scores and its location.
* Note that the maximum must be in the center
* three values, not in the end two. */
maxscore = bsearchscore[1];
maxindex = 1;
for (i = 2; i < 4; i++) {
if (bsearchscore[i] > maxscore) {
maxscore = bsearchscore[i];
maxindex = i;
}
}
/* Set up score array to interpolate for the next iteration */
lefttemp = bsearchscore[maxindex - 1];
righttemp = bsearchscore[maxindex + 1];
bsearchscore[2] = maxscore;
bsearchscore[0] = lefttemp;
bsearchscore[4] = righttemp;
/* Get new center angle and delta for next iteration */
centerangle = centerangle + delta * (maxindex - 2);
delta = 0.5 * delta;
}
*pangle = centerangle;
#if DEBUG_PRINT_SCORES
L_INFO(" Binary search score = %7.3f\n", procName, bsearchscore[2]);
#endif /* DEBUG_PRINT_SCORES */
if (pendscore) /* save if requested */
*pendscore = bsearchscore[2];
/* Return the ratio of Max score over Min score
* as a confidence value. Don't trust if the Min score
* is too small, which can happen if the image is all black
* with only a few white pixels interspersed. In that case,
* we get a contribution from the top and bottom edges when
* vertically sheared, but this contribution becomes zero when
* the shear angle is zero. For zero shear angle, the only
* contribution will be from the white pixels. We expect that
* the signal goes as the product of the (height * width^2),
* so we compute a (hopefully) normalized minimum threshold as
* a function of these dimensions. */
numaGetMin(nascore, &minscore, &minloc);
width = pixGetWidth(pixsch);
height = pixGetHeight(pixsch);
minthresh = MINSCORE_THRESHOLD_CONSTANT * width * width * height;
#if DEBUG_THRESHOLD
L_INFO(" minthresh = %10.2f, minscore = %10.2f\n", procName,
minthresh, minscore);
L_INFO(" maxscore = %10.2f\n", procName, maxscore);
#endif /* DEBUG_THRESHOLD */
if (minscore > minthresh)
*pconf = maxscore / minscore;
else
*pconf = 0.0;
/* Don't trust it if too close to the edge of the sweep
* range or if maxscore is small */
if ((centerangle > rangeleft + 2 * sweeprange - sweepdelta) ||
(centerangle < rangeleft + sweepdelta) ||
(maxscore < MIN_VALID_MAXSCORE))
*pconf = 0.0;
#if DEBUG_PRINT_BINARY
fprintf(stderr, "Binary search: angle = %7.3f, score ratio = %6.2f\n",
*pangle, *pconf);
fprintf(stderr, " max score = %8.0f\n", maxscore);
#endif /* DEBUG_PRINT_BINARY */
#if DEBUG_PLOT_SCORES
/* Plot the result -- the scores versus rotation angle --
* using gnuplot with GPLOT_POINTS. Because the data
* points are not ordered by theta (increasing or decreasing),
* using GPLOT_LINES would be confusing! */
{GPLOT *gplot;
gplot = gplotCreate("search_output", GPLOT_PNG,
"Binary search. Variance of difference of ON pixels vs. angle",
"angle (deg)", "score");
gplotAddPlot(gplot, natheta, nascore, GPLOT_POINTS, "plot1");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
}
#endif /* DEBUG_PLOT_SCORES */
cleanup:
pixDestroy(&pixsw);
pixDestroy(&pixsch);
pixDestroy(&pixt1);
pixDestroy(&pixt2);
numaDestroy(&nascore);
numaDestroy(&natheta);
return ret;
}
int main(int argc,
char **argv)
{
char label[512];
l_int32 rval, gval, bval, w, h, i, j, rwhite, gwhite, bwhite, count;
l_uint32 pixel;
GPLOT *gplot1, *gplot2;
NUMA *naseq, *na;
NUMAA *naa1, *naa2;
PIX *pixs, *pixt, *pixt0, *pixt1, *pixt2;
PIX *pixr, *pixg, *pixb; /* for color content extraction */
PIXA *pixa, *pixat;
PIXCMAP *cmap;
L_REGPARAMS *rp;
if (regTestSetup(argc, argv, &rp))
return 1;
/* Generate a pdf of results when called with display */
pixa = pixaCreate(0);
/* Generate colors by sampling hue with max sat and value.
* This image has been saved as 19-colors.png. */
pixat = pixaCreate(19);
for (i = 0; i < 19; i++) {
convertHSVToRGB((240 * i / 18), 255, 255, &rval, &gval, &bval);
composeRGBPixel(rval, gval, bval, &pixel);
pixt1 = pixCreate(50, 100, 32);
pixSetAllArbitrary(pixt1, pixel);
pixaAddPix(pixat, pixt1, L_INSERT);
}
pixt2 = pixaDisplayTiledInRows(pixat, 32, 1100, 1.0, 0, 0, 0);
regTestWritePixAndCheck(rp, pixt2, IFF_PNG); /* 0 */
pixaAddPix(pixa, pixt2, L_INSERT);
pixaDestroy(&pixat);
/* Colorspace conversion in rgb */
pixs = pixRead("wyom.jpg");
pixaAddPix(pixa, pixs, L_INSERT);
pixt = pixConvertRGBToHSV(NULL, pixs);
regTestWritePixAndCheck(rp, pixt, IFF_JFIF_JPEG); /* 1 */
pixaAddPix(pixa, pixt, L_COPY);
pixConvertHSVToRGB(pixt, pixt);
regTestWritePixAndCheck(rp, pixt, IFF_JFIF_JPEG); /* 2 */
pixaAddPix(pixa, pixt, L_INSERT);
/* Colorspace conversion on a colormap */
pixt = pixOctreeQuantNumColors(pixs, 25, 0);
regTestWritePixAndCheck(rp, pixt, IFF_JFIF_JPEG); /* 3 */
pixaAddPix(pixa, pixt, L_COPY);
cmap = pixGetColormap(pixt);
if (rp->display) pixcmapWriteStream(stderr, cmap);
pixcmapConvertRGBToHSV(cmap);
if (rp->display) pixcmapWriteStream(stderr, cmap);
regTestWritePixAndCheck(rp, pixt, IFF_JFIF_JPEG); /* 4 */
pixaAddPix(pixa, pixt, L_COPY);
pixcmapConvertHSVToRGB(cmap);
if (rp->display) pixcmapWriteStream(stderr, cmap);
regTestWritePixAndCheck(rp, pixt, IFF_JFIF_JPEG); /* 5 */
pixaAddPix(pixa, pixt, L_INSERT);
/* Color content extraction */
pixColorContent(pixs, 0, 0, 0, 0, &pixr, &pixg, &pixb);
regTestWritePixAndCheck(rp, pixr, IFF_JFIF_JPEG); /* 6 */
pixaAddPix(pixa, pixr, L_INSERT);
regTestWritePixAndCheck(rp, pixg, IFF_JFIF_JPEG); /* 7 */
pixaAddPix(pixa, pixg, L_INSERT);
regTestWritePixAndCheck(rp, pixb, IFF_JFIF_JPEG); /* 8 */
pixaAddPix(pixa, pixb, L_INSERT);
/* Color content measurement. This tests the global
* mapping of (r,g,b) --> (white), for 20 different
* values of (r,g,b). For each mappings, we compute
* the color magnitude and threshold it at six values.
* For each of those six thresholds, we plot the
* fraction of pixels that exceeds the threshold
* color magnitude, where the red value (mapped to
* white) goes between 100 and 195. */
pixat = pixaCreate(20);
naseq = numaMakeSequence(100, 5, 20);
naa1 = numaaCreate(6);
naa2 = numaaCreate(6);
for (i = 0; i < 6; i++) {
na = numaCreate(20);
numaaAddNuma(naa1, na, L_COPY);
numaaAddNuma(naa2, na, L_INSERT);
}
pixGetDimensions(pixs, &w, &h, NULL);
for (i = 0; i < 20; i++) {
rwhite = 100 + 5 * i;
gwhite = 200 - 5 * i;
bwhite = 150;
pixt0 = pixGlobalNormRGB(NULL, pixs, rwhite, gwhite, bwhite, 255);
pixaAddPix(pixat, pixt0, L_INSERT);
pixt1 = pixColorMagnitude(pixs, rwhite, gwhite, bwhite,
L_MAX_DIFF_FROM_AVERAGE_2);
for (j = 0; j < 6; j++) {
pixt2 = pixThresholdToBinary(pixt1, 30 + 10 * j);
pixInvert(pixt2, pixt2);
pixCountPixels(pixt2, &count, NULL);
na = numaaGetNuma(naa1, j, L_CLONE);
numaAddNumber(na, (l_float32)count / (l_float32)(w * h));
numaDestroy(&na);
pixDestroy(&pixt2);
}
pixDestroy(&pixt1);
pixt1 = pixColorMagnitude(pixs, rwhite, gwhite, bwhite,
L_MAX_MIN_DIFF_FROM_2);
for (j = 0; j < 6; j++) {
pixt2 = pixThresholdToBinary(pixt1, 30 + 10 * j);
pixInvert(pixt2, pixt2);
pixCountPixels(pixt2, &count, NULL);
na = numaaGetNuma(naa2, j, L_CLONE);
numaAddNumber(na, (l_float32)count / (l_float32)(w * h));
numaDestroy(&na);
pixDestroy(&pixt2);
}
pixDestroy(&pixt1);
}
gplot1 = gplotCreate("/tmp/regout/colorspace.10", GPLOT_PNG,
"Fraction with given color (diff from average)",
"white point space for red", "amount of color");
gplot2 = gplotCreate("/tmp/regout/colorspace.11", GPLOT_PNG,
"Fraction with given color (min diff)",
"white point space for red", "amount of color");
for (j = 0; j < 6; j++) {
na = numaaGetNuma(naa1, j, L_CLONE);
sprintf(label, "thresh %d", 30 + 10 * j);
gplotAddPlot(gplot1, naseq, na, GPLOT_LINES, label);
numaDestroy(&na);
na = numaaGetNuma(naa2, j, L_CLONE);
gplotAddPlot(gplot2, naseq, na, GPLOT_LINES, label);
numaDestroy(&na);
}
gplotMakeOutput(gplot1);
gplotMakeOutput(gplot2);
gplotDestroy(&gplot1);
gplotDestroy(&gplot2);
pixt1 = pixaDisplayTiledAndScaled(pixat, 32, 250, 4, 0, 10, 2);
regTestWritePixAndCheck(rp, pixt1, IFF_JFIF_JPEG); /* 9 */
pixaAddPix(pixa, pixt1, L_INSERT);
pixDisplayWithTitle(pixt1, 0, 100, "Color magnitude", rp->display);
pixaDestroy(&pixat);
numaDestroy(&naseq);
numaaDestroy(&naa1);
numaaDestroy(&naa2);
/* Give gnuplot time to write out the files */
#ifndef _WIN32
sleep(1);
#else
Sleep(1000);
#endif /* _WIN32 */
/* Save as golden files, or check against them */
regTestCheckFile(rp, "/tmp/regout/colorspace.10.png"); /* 10 */
regTestCheckFile(rp, "/tmp/regout/colorspace.11.png"); /* 11 */
if (rp->display) {
pixt = pixRead("/tmp/regout/colorspace.10.png");
pixaAddPix(pixa, pixt, L_INSERT);
pixt = pixRead("/tmp/regout/colorspace.11.png");
pixaAddPix(pixa, pixt, L_INSERT);
pixaConvertToPdf(pixa, 0, 1.0, 0, 0, "colorspace tests",
"/tmp/regout/colorspace.pdf");
L_INFO("Output pdf: /tmp/regout/colorspace.pdf\n", rp->testname);
}
pixaDestroy(&pixa);
return regTestCleanup(rp);
}
int main(int argc,
char **argv) {
l_int32 i, n, binsize, binstart, nbins;
l_float32 pi, val, angle, xval, yval, x0, y0, rank, startval, fbinsize;
l_float32 minval, maxval, meanval, median, variance, rankval;
GPLOT *gplot;
NUMA *na, *nahisto, *nax, *nay, *nap, *nasx, *nasy;
NUMA *nadx, *nady, *nafx, *nafy, *na1, *na2, *na3, *na4;
PIX *pixs, *pix1, *pix2, *pix3, *pix4, *pix5, *pixd;
PIXA *pixa;
static char mainName[] = "numa1_reg";
if (argc != 1)
return ERROR_INT(" Syntax: numa1_reg", mainName, 1);
lept_mkdir("lept");
/* -------------------------------------------------------------------*
* Histograms *
* -------------------------------------------------------------------*/
#if DO_ALL
pi = 3.1415926535;
na = numaCreate(5000);
for (i = 0; i < 500000; i++) {
angle = 0.02293 * i * pi;
val = (l_float32)(999. * sin(angle));
numaAddNumber(na, val);
}
nahisto = numaMakeHistogramClipped(na, 6, 2000);
nbins = numaGetCount(nahisto);
nax = numaMakeSequence(0, 1, nbins);
gplot = gplotCreate("/tmp/lept/numa_histo1", GPLOT_X11, "example histo 1",
"i", "histo[i]");
gplotAddPlot(gplot, nax, nahisto, GPLOT_LINES, "sine");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nax);
numaDestroy(&nahisto);
nahisto = numaMakeHistogram(na, 1000, &binsize, &binstart);
nbins = numaGetCount(nahisto);
nax = numaMakeSequence(binstart, binsize, nbins);
fprintf(stderr, " binsize = %d, binstart = %d\n", binsize, binstart);
gplot = gplotCreate("/tmp/lept/numa_histo2", GPLOT_X11, "example histo 2",
"i", "histo[i]");
gplotAddPlot(gplot, nax, nahisto, GPLOT_LINES, "sine");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nax);
numaDestroy(&nahisto);
nahisto = numaMakeHistogram(na, 1000, &binsize, NULL);
nbins = numaGetCount(nahisto);
nax = numaMakeSequence(0, binsize, nbins);
fprintf(stderr, " binsize = %d, binstart = %d\n", binsize, 0);
gplot = gplotCreate("/tmp/lept/numa_histo3", GPLOT_X11, "example histo 3",
"i", "histo[i]");
gplotAddPlot(gplot, nax, nahisto, GPLOT_LINES, "sine");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nax);
numaDestroy(&nahisto);
nahisto = numaMakeHistogramAuto(na, 1000);
nbins = numaGetCount(nahisto);
numaGetParameters(nahisto, &startval, &fbinsize);
nax = numaMakeSequence(startval, fbinsize, nbins);
fprintf(stderr, " binsize = %7.4f, binstart = %8.3f\n",
fbinsize, startval);
gplot = gplotCreate("/tmp/lept/numa_histo4", GPLOT_X11, "example histo 4",
"i", "histo[i]");
gplotAddPlot(gplot, nax, nahisto, GPLOT_LINES, "sine");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nax);
numaDestroy(&nahisto);
numaGetStatsUsingHistogram(na, 2000, &minval, &maxval, &meanval,
&variance, &median, 0.80, &rankval, &nahisto);
fprintf(stderr, "Sin histogram: \n"
" min val = %7.2f -- should be -999.00\n"
" max val = %7.2f -- should be 999.00\n"
" mean val = %7.2f -- should be 0.06\n"
" median = %7.2f -- should be 0.30\n"
" rmsdev = %7.2f -- should be 706.41\n"
" rank val = %7.2f -- should be 808.15\n",
minval, maxval, meanval, median, sqrt((l_float64) variance),
rankval);
numaHistogramGetRankFromVal(nahisto, 808.15, &rank);
fprintf(stderr, " rank = %7.3f -- should be 0.800\n", rank);
numaDestroy(&nahisto);
numaDestroy(&na);
#endif
/* -------------------------------------------------------------------*
* Interpolation *
* -------------------------------------------------------------------*/
#if DO_ALL
/* Test numaInterpolateEqxInterval() */
pixs = pixRead("test8.jpg");
na = pixGetGrayHistogramMasked(pixs, NULL, 0, 0, 1);
/* numaWriteStream(stderr, na); */
nasy = numaGetPartialSums(na);
gplotSimple1(nasy, GPLOT_X11, "/tmp/lept/numa_int1", "partial sums");
gplotSimple1(na, GPLOT_X11, "/tmp/lept/numa_int2", "simple test");
numaInterpolateEqxInterval(0.0, 1.0, na, L_LINEAR_INTERP,
0.0, 255.0, 15, &nax, &nay);
gplot = gplotCreate("/tmp/lept/numa_int3", GPLOT_X11, "test interpolation",
"pix val", "num pix");
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, "plot 1");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&na);
numaDestroy(&nasy);
numaDestroy(&nax);
numaDestroy(&nay);
pixDestroy(&pixs);
#endif
#if DO_ALL
/* Test numaInterpolateArbxInterval() */
pixs = pixRead("test8.jpg");
na = pixGetGrayHistogramMasked(pixs, NULL, 0, 0, 1);
nasy = numaGetPartialSums(na);
numaInsertNumber(nasy, 0, 0.0);
nasx = numaMakeSequence(0.0, 1.0, 257);
/* gplotSimple1(nasy, GPLOT_X11, "/tmp/numa/nasy", "partial sums"); */
numaInterpolateArbxInterval(nasx, nasy, L_LINEAR_INTERP,
10.0, 250.0, 23, &nax, &nay);
gplot = gplotCreate("/tmp/lept/numa_int4", GPLOT_X11, "arbx interpolation",
"pix val", "cum num pix");
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, "plot 1");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&na);
numaDestroy(&nasx);
numaDestroy(&nasy);
numaDestroy(&nax);
numaDestroy(&nay);
pixDestroy(&pixs);
#endif
#if DO_ALL
/* Test numaInterpolateArbxVal() */
pixs = pixRead("test8.jpg");
na = pixGetGrayHistogramMasked(pixs, NULL, 0, 0, 1);
nasy = numaGetPartialSums(na);
numaInsertNumber(nasy, 0, 0.0);
nasx = numaMakeSequence(0.0, 1.0, 257);
/* gplotSimple1(nasy, GPLOT_X11, "/tmp/numa/nasy", "partial sums"); */
nax = numaMakeSequence(15.0, (250.0 - 15.0) / 23.0, 24);
n = numaGetCount(nax);
nay = numaCreate(n);
for (i = 0; i < n; i++) {
numaGetFValue(nax, i, &xval);
numaInterpolateArbxVal(nasx, nasy, L_QUADRATIC_INTERP, xval, &yval);
numaAddNumber(nay, yval);
}
gplot = gplotCreate("/tmp/lept/numa_int5", GPLOT_X11, "arbx interpolation",
"pix val", "cum num pix");
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, "plot 1");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&na);
numaDestroy(&nasx);
numaDestroy(&nasy);
numaDestroy(&nax);
numaDestroy(&nay);
pixDestroy(&pixs);
#endif
#if DO_ALL
/* Test interpolation */
nasx = numaRead("testangle.na");
nasy = numaRead("testscore.na");
gplot = gplotCreate("/tmp/lept/numa_int6", GPLOT_X11, "arbx interpolation",
"angle", "score");
numaInterpolateArbxInterval(nasx, nasy, L_LINEAR_INTERP,
-2.00, 0.0, 50, &nax, &nay);
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, "linear");
numaDestroy(&nax);
numaDestroy(&nay);
numaInterpolateArbxInterval(nasx, nasy, L_QUADRATIC_INTERP,
-2.00, 0.0, 50, &nax, &nay);
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, "quadratic");
numaDestroy(&nax);
numaDestroy(&nay);
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
gplot = gplotCreate("/tmp/lept/numa_int7", GPLOT_X11, "arbx interpolation",
"angle", "score");
numaInterpolateArbxInterval(nasx, nasy, L_LINEAR_INTERP,
-1.2, -0.8, 50, &nax, &nay);
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, "quadratic");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaFitMax(nay, &yval, nax, &xval);
fprintf(stderr, "max = %f at loc = %f\n", yval, xval);
numaDestroy(&nasx);
numaDestroy(&nasy);
numaDestroy(&nax);
numaDestroy(&nay);
#endif
/* -------------------------------------------------------------------*
* Integration and differentiation *
* -------------------------------------------------------------------*/
#if DO_ALL
/* Test integration and differentiation */
nasx = numaRead("testangle.na");
nasy = numaRead("testscore.na");
/* ---------- Plot the derivative ---------- */
numaDifferentiateInterval(nasx, nasy, -2.0, 0.0, 50, &nadx, &nady);
gplot = gplotCreate("/tmp/lept/numa_diff1", GPLOT_X11, "derivative",
"angle", "slope");
gplotAddPlot(gplot, nadx, nady, GPLOT_LINES, "derivative");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
/* ---------- Plot the original function ----------- */
/* and the integral of the derivative; the two */
/* should be approximately the same. */
gplot = gplotCreate("/tmp/lept/numa_diff2", GPLOT_X11, "integ-diff",
"angle", "val");
numaInterpolateArbxInterval(nasx, nasy, L_LINEAR_INTERP,
-2.00, 0.0, 50, &nafx, &nafy);
gplotAddPlot(gplot, nafx, nafy, GPLOT_LINES, "function");
n = numaGetCount(nadx);
numaGetFValue(nafx, 0, &x0);
numaGetFValue(nafy, 0, &y0);
nay = numaCreate(n);
/* (Note: this tests robustness of the integrator: we go from
* i = 0, and choose to have only 1 point in the interpolation
* there, which is too small and causes the function to bomb out.) */
fprintf(stderr, "We must get a 'npts < 2' error here:\n");
for (i = 0; i < n; i++) {
numaGetFValue(nadx, i, &xval);
numaIntegrateInterval(nadx, nady, x0, xval, 2 * i + 1, &yval);
numaAddNumber(nay, y0 + yval);
}
gplotAddPlot(gplot, nafx, nay, GPLOT_LINES, "anti-derivative");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nasx);
numaDestroy(&nasy);
numaDestroy(&nafx);
numaDestroy(&nafy);
numaDestroy(&nadx);
numaDestroy(&nady);
numaDestroy(&nay);
#endif
/* -------------------------------------------------------------------*
* Rank extraction *
* -------------------------------------------------------------------*/
#if DO_ALL
/* Rank extraction with interpolation */
pixs = pixRead("test8.jpg");
nasy = pixGetGrayHistogramMasked(pixs, NULL, 0, 0, 1);
numaMakeRankFromHistogram(0.0, 1.0, nasy, 350, &nax, &nay);
gplot = gplotCreate("/tmp/lept/numa_rank1", GPLOT_X11,
"test rank extractor", "pix val", "rank val");
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, "plot 1");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nasy);
numaDestroy(&nax);
numaDestroy(&nay);
pixDestroy(&pixs);
#endif
#if DO_ALL
/* Rank extraction, point by point */
pixs = pixRead("test8.jpg");
nap = numaCreate(200);
pixGetRankValueMasked(pixs, NULL, 0, 0, 2, 0.0, &val, &na);
for (i = 0; i < 101; i++) {
rank = 0.01 * i;
numaHistogramGetValFromRank(na, rank, &val);
numaAddNumber(nap, val);
}
gplotSimple1(nap, GPLOT_X11, "/tmp/lept/numa_rank2", "rank value");
numaDestroy(&na);
numaDestroy(&nap);
pixDestroy(&pixs);
#endif
/* -------------------------------------------------------------------*
* Numa-morphology *
* -------------------------------------------------------------------*/
#if DO_ALL
na = numaRead("lyra.5.na");
gplotSimple1(na, GPLOT_PNG, "/tmp/lept/numa_lyra1", "Original");
na1 = numaErode(na, 21);
gplotSimple1(na1, GPLOT_PNG, "/tmp/lept/numa_lyra2", "Erosion");
na2 = numaDilate(na, 21);
gplotSimple1(na2, GPLOT_PNG, "/tmp/lept/numa_lyra3", "Dilation");
na3 = numaOpen(na, 21);
gplotSimple1(na3, GPLOT_PNG, "/tmp/lept/numa_lyra4", "Opening");
na4 = numaClose(na, 21);
gplotSimple1(na4, GPLOT_PNG, "/tmp/lept/numa_lyra5", "Closing");
#ifndef _WIN32
sleep(1);
#else
Sleep(1000);
#endif /* _WIN32 */
pixa = pixaCreate(5);
pix1 = pixRead("/tmp/lept/numa_lyra1.png");
pix2 = pixRead("/tmp/lept/numa_lyra2.png");
pix3 = pixRead("/tmp/lept/numa_lyra3.png");
pix4 = pixRead("/tmp/lept/numa_lyra4.png");
pix5 = pixRead("/tmp/lept/numa_lyra5.png");
pixSaveTiled(pix1, pixa, 1.0, 1, 25, 32);
pixSaveTiled(pix2, pixa, 1.0, 1, 25, 32);
pixSaveTiled(pix3, pixa, 1.0, 0, 25, 32);
pixSaveTiled(pix4, pixa, 1.0, 1, 25, 32);
pixSaveTiled(pix5, pixa, 1.0, 0, 25, 32);
pixd = pixaDisplay(pixa, 0, 0);
pixDisplay(pixd, 100, 100);
pixWrite("/tmp/lept/numa_morph.png", pixd, IFF_PNG);
numaDestroy(&na);
numaDestroy(&na1);
numaDestroy(&na2);
numaDestroy(&na3);
numaDestroy(&na4);
pixaDestroy(&pixa);
pixDestroy(&pix1);
pixDestroy(&pix2);
pixDestroy(&pix3);
pixDestroy(&pix4);
pixDestroy(&pix5);
pixDestroy(&pixd);
#endif
return 0;
}
int main(int argc,
char **argv)
{
char *selname;
l_int32 i, j, nsels, sx, sy;
l_float32 fact, time;
GPLOT *gplot;
NUMA *na1, *na2, *na3, *na4, *nac1, *nac2, *nac3, *nac4, *nax;
PIX *pixs, *pixt;
PIXA *pixa;
SEL *sel;
SELA *selalinear;
static char mainName[] = "dwamorph2_reg";
if (argc != 1)
return ERROR_INT(" Syntax: dwamorph2_reg", mainName, 1);
pixs = pixRead("feyn-fract.tif");
pixt = pixCreateTemplate(pixs);
selalinear = selaAddDwaLinear(NULL);
nsels = selaGetCount(selalinear);
fact = 1000. / (l_float32)NTIMES; /* converts to time in msec */
na1 = numaCreate(64);
na2 = numaCreate(64);
na3 = numaCreate(64);
na4 = numaCreate(64);
lept_mkdir("lept/morph");
/* --------- dilation ----------*/
for (i = 0; i < nsels / 2; i++)
{
sel = selaGetSel(selalinear, i);
selGetParameters(sel, &sy, &sx, NULL, NULL);
selname = selGetName(sel);
fprintf(stderr, " %d .", i);
startTimer();
for (j = 0; j < NTIMES; j++)
pixDilate(pixt, pixs, sel);
time = fact * stopTimer();
numaAddNumber(na1, time);
startTimer();
for (j = 0; j < NTIMES; j++)
pixDilateCompBrick(pixt, pixs, sx, sy);
time = fact * stopTimer();
numaAddNumber(na2, time);
startTimer();
for (j = 0; j < NTIMES; j++)
pixMorphDwa_3(pixt, pixs, L_MORPH_DILATE, selname);
time = fact * stopTimer();
numaAddNumber(na3, time);
startTimer();
for (j = 0; j < NTIMES; j++)
pixDilateCompBrickDwa(pixt, pixs, sx, sy);
time = fact * stopTimer();
numaAddNumber(na4, time);
}
nax = numaMakeSequence(2, 1, nsels / 2);
nac1 = numaWindowedMean(na1, HALFWIDTH);
nac2 = numaWindowedMean(na2, HALFWIDTH);
nac3 = numaWindowedMean(na3, HALFWIDTH);
nac4 = numaWindowedMean(na4, HALFWIDTH);
gplot = gplotCreate("/tmp/lept/morph/dilate", GPLOT_PNG,
"Dilation time vs sel size", "size", "time (ms)");
gplotAddPlot(gplot, nax, nac1, GPLOT_LINES, "linear rasterop");
gplotAddPlot(gplot, nax, nac2, GPLOT_LINES, "composite rasterop");
gplotAddPlot(gplot, nax, nac3, GPLOT_LINES, "linear dwa");
gplotAddPlot(gplot, nax, nac4, GPLOT_LINES, "composite dwa");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nac1);
numaDestroy(&nac2);
numaDestroy(&nac3);
numaDestroy(&nac4);
/* --------- erosion ----------*/
numaEmpty(na1);
numaEmpty(na2);
numaEmpty(na3);
numaEmpty(na4);
for (i = 0; i < nsels / 2; i++)
{
sel = selaGetSel(selalinear, i);
selGetParameters(sel, &sy, &sx, NULL, NULL);
selname = selGetName(sel);
fprintf(stderr, " %d .", i);
startTimer();
for (j = 0; j < NTIMES; j++)
pixErode(pixt, pixs, sel);
time = fact * stopTimer();
numaAddNumber(na1, time);
startTimer();
for (j = 0; j < NTIMES; j++)
pixErodeCompBrick(pixt, pixs, sx, sy);
time = fact * stopTimer();
numaAddNumber(na2, time);
startTimer();
for (j = 0; j < NTIMES; j++)
pixMorphDwa_3(pixt, pixs, L_MORPH_ERODE, selname);
time = fact * stopTimer();
numaAddNumber(na3, time);
startTimer();
for (j = 0; j < NTIMES; j++)
pixErodeCompBrickDwa(pixt, pixs, sx, sy);
time = fact * stopTimer();
numaAddNumber(na4, time);
}
nac1 = numaWindowedMean(na1, HALFWIDTH);
nac2 = numaWindowedMean(na2, HALFWIDTH);
nac3 = numaWindowedMean(na3, HALFWIDTH);
nac4 = numaWindowedMean(na4, HALFWIDTH);
gplot = gplotCreate("/tmp/lept/morph/erode", GPLOT_PNG,
"Erosion time vs sel size", "size", "time (ms)");
gplotAddPlot(gplot, nax, nac1, GPLOT_LINES, "linear rasterop");
gplotAddPlot(gplot, nax, nac2, GPLOT_LINES, "composite rasterop");
gplotAddPlot(gplot, nax, nac3, GPLOT_LINES, "linear dwa");
gplotAddPlot(gplot, nax, nac4, GPLOT_LINES, "composite dwa");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nac1);
numaDestroy(&nac2);
numaDestroy(&nac3);
numaDestroy(&nac4);
/* --------- opening ----------*/
numaEmpty(na1);
numaEmpty(na2);
numaEmpty(na3);
numaEmpty(na4);
for (i = 0; i < nsels / 2; i++)
{
sel = selaGetSel(selalinear, i);
selGetParameters(sel, &sy, &sx, NULL, NULL);
selname = selGetName(sel);
fprintf(stderr, " %d .", i);
startTimer();
for (j = 0; j < NTIMES; j++)
pixOpen(pixt, pixs, sel);
time = fact * stopTimer();
numaAddNumber(na1, time);
startTimer();
for (j = 0; j < NTIMES; j++)
pixOpenCompBrick(pixt, pixs, sx, sy);
time = fact * stopTimer();
numaAddNumber(na2, time);
startTimer();
for (j = 0; j < NTIMES; j++)
pixMorphDwa_3(pixt, pixs, L_MORPH_OPEN, selname);
time = fact * stopTimer();
numaAddNumber(na3, time);
startTimer();
for (j = 0; j < NTIMES; j++)
pixOpenCompBrickDwa(pixt, pixs, sx, sy);
time = fact * stopTimer();
numaAddNumber(na4, time);
}
nac1 = numaWindowedMean(na1, HALFWIDTH);
nac2 = numaWindowedMean(na2, HALFWIDTH);
nac3 = numaWindowedMean(na3, HALFWIDTH);
nac4 = numaWindowedMean(na4, HALFWIDTH);
gplot = gplotCreate("/tmp/lept/morph/open", GPLOT_PNG,
"Opening time vs sel size", "size", "time (ms)");
gplotAddPlot(gplot, nax, nac1, GPLOT_LINES, "linear rasterop");
gplotAddPlot(gplot, nax, nac2, GPLOT_LINES, "composite rasterop");
gplotAddPlot(gplot, nax, nac3, GPLOT_LINES, "linear dwa");
gplotAddPlot(gplot, nax, nac4, GPLOT_LINES, "composite dwa");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nac1);
numaDestroy(&nac2);
numaDestroy(&nac3);
numaDestroy(&nac4);
/* --------- closing ----------*/
numaEmpty(na1);
numaEmpty(na2);
numaEmpty(na3);
numaEmpty(na4);
for (i = 0; i < nsels / 2; i++)
{
sel = selaGetSel(selalinear, i);
selGetParameters(sel, &sy, &sx, NULL, NULL);
selname = selGetName(sel);
fprintf(stderr, " %d .", i);
startTimer();
for (j = 0; j < NTIMES; j++)
pixClose(pixt, pixs, sel);
time = fact * stopTimer();
numaAddNumber(na1, time);
startTimer();
for (j = 0; j < NTIMES; j++)
pixCloseCompBrick(pixt, pixs, sx, sy);
time = fact * stopTimer();
numaAddNumber(na2, time);
startTimer();
for (j = 0; j < NTIMES; j++)
pixMorphDwa_3(pixt, pixs, L_MORPH_CLOSE, selname);
time = fact * stopTimer();
numaAddNumber(na3, time);
startTimer();
for (j = 0; j < NTIMES; j++)
pixCloseCompBrickDwa(pixt, pixs, sx, sy);
time = fact * stopTimer();
numaAddNumber(na4, time);
}
nac1 = numaWindowedMean(na1, HALFWIDTH);
nac2 = numaWindowedMean(na2, HALFWIDTH);
nac3 = numaWindowedMean(na3, HALFWIDTH);
nac4 = numaWindowedMean(na4, HALFWIDTH);
gplot = gplotCreate("/tmp/lept/morph/close", GPLOT_PNG,
"Closing time vs sel size", "size", "time (ms)");
gplotAddPlot(gplot, nax, nac1, GPLOT_LINES, "linear rasterop");
gplotAddPlot(gplot, nax, nac2, GPLOT_LINES, "composite rasterop");
gplotAddPlot(gplot, nax, nac3, GPLOT_LINES, "linear dwa");
gplotAddPlot(gplot, nax, nac4, GPLOT_LINES, "composite dwa");
gplotMakeOutput(gplot);
#ifndef _WIN32
sleep(1);
#else
Sleep(1000);
#endif /* _WIN32 */
gplotDestroy(&gplot);
numaDestroy(&nac1);
numaDestroy(&nac2);
numaDestroy(&nac3);
numaDestroy(&nac4);
numaDestroy(&na1);
numaDestroy(&na2);
numaDestroy(&na3);
numaDestroy(&na4);
numaDestroy(&nax);
selaDestroy(&selalinear);
pixDestroy(&pixt);
pixDestroy(&pixs);
/* Display the results together */
pixa = pixaCreate(0);
pixs = pixRead("/tmp/lept/morph/dilate.png");
pixaAddPix(pixa, pixs, L_INSERT);
pixs = pixRead("/tmp/lept/morph/erode.png");
pixaAddPix(pixa, pixs, L_INSERT);
pixs = pixRead("/tmp/lept/morph/open.png");
pixaAddPix(pixa, pixs, L_INSERT);
pixs = pixRead("/tmp/lept/morph/close.png");
pixaAddPix(pixa, pixs, L_INSERT);
pixt = pixaDisplayTiledInRows(pixa, 32, 1500, 1.0, 0, 40, 3);
pixWrite("/tmp/lept/morph/timings.png", pixt, IFF_PNG);
pixDisplay(pixt, 100, 100);
pixDestroy(&pixt);
pixaDestroy(&pixa);
return 0;
}
/*!
* \brief pixItalicWords()
*
* \param[in] pixs 1 bpp
* \param[in] boxaw [optional] word bounding boxes; can be NULL
* \param[in] pixw [optional] word box mask; can be NULL
* \param[out] pboxa boxa of italic words
* \param[in] debugflag 1 for debug output; 0 otherwise
* \return 0 if OK, 1 on error
*
* <pre>
* Notes:
* (1) You can input the bounding boxes for the words in one of
* two forms: as bounding boxes (%boxaw) or as a word mask with
* the word bounding boxes filled (%pixw). For example,
* to compute %pixw, you can use pixWordMaskByDilation().
* (2) Alternatively, you can set both of these inputs to NULL,
* in which case the word mask is generated here. This is
* done by dilating and closing the input image to connect
* letters within a word, while leaving the words separated.
* The parameters are chosen under the assumption that the
* input is 10 to 12 pt text, scanned at about 300 ppi.
* (3) sel_ital1 and sel_ital2 detect the right edges that are
* nearly vertical, at approximately the angle of italic
* strokes. We use the right edge to avoid getting seeds
* from lower-case 'y'. The typical italic slant has a smaller
* angle with the vertical than the 'W', so in most cases we
* will not trigger on the slanted lines in the 'W'.
* (4) Note that sel_ital2 is shorter than sel_ital1. It is
* more appropriate for a typical font scanned at 200 ppi.
* </pre>
*/
l_int32
pixItalicWords(PIX *pixs,
BOXA *boxaw,
PIX *pixw,
BOXA **pboxa,
l_int32 debugflag)
{
char opstring[32];
l_int32 size;
BOXA *boxa;
PIX *pixsd, *pixm, *pixd;
SEL *sel_ital1, *sel_ital2, *sel_ital3;
PROCNAME("pixItalicWords");
if (!pixs)
return ERROR_INT("pixs not defined", procName, 1);
if (!pboxa)
return ERROR_INT("&boxa not defined", procName, 1);
if (boxaw && pixw)
return ERROR_INT("both boxaw and pixw are defined", procName, 1);
sel_ital1 = selCreateFromString(str_ital1, 13, 6, NULL);
sel_ital2 = selCreateFromString(str_ital2, 10, 6, NULL);
sel_ital3 = selCreateFromString(str_ital3, 4, 2, NULL);
/* Make the italic seed: extract with HMT; remove noise.
* The noise removal close/open is important to exclude
* situations where a small slanted line accidentally
* matches sel_ital1. */
pixsd = pixHMT(NULL, pixs, sel_ital1);
pixClose(pixsd, pixsd, sel_ital3);
pixOpen(pixsd, pixsd, sel_ital3);
/* Make the word mask. Use input boxes or mask if given. */
size = 0; /* init */
if (boxaw) {
pixm = pixCreateTemplate(pixs);
pixMaskBoxa(pixm, pixm, boxaw, L_SET_PIXELS);
} else if (pixw) {
pixm = pixClone(pixw);
} else {
pixWordMaskByDilation(pixs, NULL, &size, NULL);
L_INFO("dilation size = %d\n", procName, size);
snprintf(opstring, sizeof(opstring), "d1.5 + c%d.1", size);
pixm = pixMorphSequence(pixs, opstring, 0);
}
/* Binary reconstruction to fill in those word mask
* components for which there is at least one seed pixel. */
pixd = pixSeedfillBinary(NULL, pixsd, pixm, 8);
boxa = pixConnComp(pixd, NULL, 8);
*pboxa = boxa;
if (debugflag) {
/* Save results at at 2x reduction */
lept_mkdir("lept/ital");
l_int32 res, upper;
BOXA *boxat;
GPLOT *gplot;
NUMA *na;
PIXA *pad;
PIX *pix1, *pix2, *pix3;
pad = pixaCreate(0);
boxat = pixConnComp(pixm, NULL, 8);
boxaWrite("/tmp/lept/ital/ital.ba", boxat);
pixSaveTiledOutline(pixs, pad, 0.5, 1, 20, 2, 32); /* orig */
pixSaveTiledOutline(pixsd, pad, 0.5, 1, 20, 2, 0); /* seed */
pix1 = pixConvertTo32(pixm);
pixRenderBoxaArb(pix1, boxat, 3, 255, 0, 0);
pixSaveTiledOutline(pix1, pad, 0.5, 1, 20, 2, 0); /* mask + outline */
pixDestroy(&pix1);
pixSaveTiledOutline(pixd, pad, 0.5, 1, 20, 2, 0); /* ital mask */
pix1 = pixConvertTo32(pixs);
pixRenderBoxaArb(pix1, boxa, 3, 255, 0, 0);
pixSaveTiledOutline(pix1, pad, 0.5, 1, 20, 2, 0); /* orig + outline */
pixDestroy(&pix1);
pix1 = pixCreateTemplate(pixs);
pix2 = pixSetBlackOrWhiteBoxa(pix1, boxa, L_SET_BLACK);
pixCopy(pix1, pixs);
pix3 = pixDilateBrick(NULL, pixs, 3, 3);
pixCombineMasked(pix1, pix3, pix2);
pixSaveTiledOutline(pix1, pad, 0.5, 1, 20, 2, 0); /* ital bolded */
pixDestroy(&pix1);
pixDestroy(&pix2);
pixDestroy(&pix3);
pix2 = pixaDisplay(pad, 0, 0);
pixWrite("/tmp/lept/ital/ital.png", pix2, IFF_PNG);
pixDestroy(&pix2);
/* Assuming the image represents 6 inches of actual page width,
* the pixs resolution is approximately
* (width of pixs in pixels) / 6
* and the images have been saved at half this resolution. */
res = pixGetWidth(pixs) / 12;
L_INFO("resolution = %d\n", procName, res);
l_pdfSetDateAndVersion(0);
pixaConvertToPdf(pad, res, 1.0, L_FLATE_ENCODE, 75, "Italic Finder",
"/tmp/lept/ital/ital.pdf");
l_pdfSetDateAndVersion(1);
pixaDestroy(&pad);
boxaDestroy(&boxat);
/* Plot histogram of horizontal white run sizes. A small
* initial vertical dilation removes most runs that are neither
* inter-character nor inter-word. The larger first peak is
* from inter-character runs, and the smaller second peak is
* from inter-word runs. */
pix1 = pixDilateBrick(NULL, pixs, 1, 15);
upper = L_MAX(30, 3 * size);
na = pixRunHistogramMorph(pix1, L_RUN_OFF, L_HORIZ, upper);
pixDestroy(&pix1);
gplot = gplotCreate("/tmp/lept/ital/runhisto", GPLOT_PNG,
"Histogram of horizontal runs of white pixels, vs length",
"run length", "number of runs");
gplotAddPlot(gplot, NULL, na, GPLOT_LINES, "plot1");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&na);
}
selDestroy(&sel_ital1);
selDestroy(&sel_ital2);
selDestroy(&sel_ital3);
pixDestroy(&pixsd);
pixDestroy(&pixm);
pixDestroy(&pixd);
return 0;
}
/*!
* \brief pixFindBaselines()
*
* \param[in] pixs 1 bpp, 300 ppi
* \param[out] ppta [optional] pairs of pts corresponding to
* approx. ends of each text line
* \param[in] pixadb for debug output; use NULL to skip
* \return na of baseline y values, or NULL on error
*
* <pre>
* Notes:
* (1) Input binary image must have text lines already aligned
* horizontally. This can be done by either rotating the
* image with pixDeskew(), or, if a projective transform
* is required, by doing pixDeskewLocal() first.
* (2) Input null for &pta if you don't want this returned.
* The pta will come in pairs of points (left and right end
* of each baseline).
* (3) Caution: this will not work properly on text with multiple
* columns, where the lines are not aligned between columns.
* If there are multiple columns, they should be extracted
* separately before finding the baselines.
* (4) This function constructs different types of output
* for baselines; namely, a set of raster line values and
* a set of end points of each baseline.
* (5) This function was designed to handle short and long text lines
* without using dangerous thresholds on the peak heights. It does
* this by combining the differential signal with a morphological
* analysis of the locations of the text lines. One can also
* combine this data to normalize the peak heights, by weighting
* the differential signal in the region of each baseline
* by the inverse of the width of the text line found there.
* </pre>
*/
NUMA *
pixFindBaselines(PIX *pixs,
PTA **ppta,
PIXA *pixadb)
{
l_int32 h, i, j, nbox, val1, val2, ndiff, bx, by, bw, bh;
l_int32 imaxloc, peakthresh, zerothresh, inpeak;
l_int32 mintosearch, max, maxloc, nloc, locval;
l_int32 *array;
l_float32 maxval;
BOXA *boxa1, *boxa2, *boxa3;
GPLOT *gplot;
NUMA *nasum, *nadiff, *naloc, *naval;
PIX *pix1, *pix2;
PTA *pta;
PROCNAME("pixFindBaselines");
if (ppta) *ppta = NULL;
if (!pixs || pixGetDepth(pixs) != 1)
return (NUMA *)ERROR_PTR("pixs undefined or not 1 bpp", procName, NULL);
/* Close up the text characters, removing noise */
pix1 = pixMorphSequence(pixs, "c25.1 + e15.1", 0);
/* Estimate the resolution */
if (pixadb) pixaAddPix(pixadb, pixScale(pix1, 0.25, 0.25), L_INSERT);
/* Save the difference of adjacent row sums.
* The high positive-going peaks are the baselines */
if ((nasum = pixCountPixelsByRow(pix1, NULL)) == NULL) {
pixDestroy(&pix1);
return (NUMA *)ERROR_PTR("nasum not made", procName, NULL);
}
h = pixGetHeight(pixs);
nadiff = numaCreate(h);
numaGetIValue(nasum, 0, &val2);
for (i = 0; i < h - 1; i++) {
val1 = val2;
numaGetIValue(nasum, i + 1, &val2);
numaAddNumber(nadiff, val1 - val2);
}
numaDestroy(&nasum);
if (pixadb) { /* show the difference signal */
lept_mkdir("lept/baseline");
gplotSimple1(nadiff, GPLOT_PNG, "/tmp/lept/baseline/diff", "Diff Sig");
pix2 = pixRead("/tmp/lept/baseline/diff.png");
pixaAddPix(pixadb, pix2, L_INSERT);
}
/* Use the zeroes of the profile to locate each baseline. */
array = numaGetIArray(nadiff);
ndiff = numaGetCount(nadiff);
numaGetMax(nadiff, &maxval, &imaxloc);
numaDestroy(&nadiff);
/* Use this to begin locating a new peak: */
peakthresh = (l_int32)maxval / PEAK_THRESHOLD_RATIO;
/* Use this to begin a region between peaks: */
zerothresh = (l_int32)maxval / ZERO_THRESHOLD_RATIO;
naloc = numaCreate(0);
naval = numaCreate(0);
inpeak = FALSE;
for (i = 0; i < ndiff; i++) {
if (inpeak == FALSE) {
if (array[i] > peakthresh) { /* transition to in-peak */
inpeak = TRUE;
mintosearch = i + MIN_DIST_IN_PEAK; /* accept no zeros
* between i and mintosearch */
max = array[i];
maxloc = i;
}
} else { /* inpeak == TRUE; look for max */
if (array[i] > max) {
max = array[i];
maxloc = i;
mintosearch = i + MIN_DIST_IN_PEAK;
} else if (i > mintosearch && array[i] <= zerothresh) { /* leave */
inpeak = FALSE;
numaAddNumber(naval, max);
numaAddNumber(naloc, maxloc);
}
}
}
LEPT_FREE(array);
/* If array[ndiff-1] is max, eg. no descenders, baseline at bottom */
if (inpeak) {
numaAddNumber(naval, max);
numaAddNumber(naloc, maxloc);
}
if (pixadb) { /* show the raster locations for the peaks */
gplot = gplotCreate("/tmp/lept/baseline/loc", GPLOT_PNG, "Peak locs",
"rasterline", "height");
gplotAddPlot(gplot, naloc, naval, GPLOT_POINTS, "locs");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
pix2 = pixRead("/tmp/lept/baseline/loc.png");
pixaAddPix(pixadb, pix2, L_INSERT);
}
numaDestroy(&naval);
/* Generate an approximate profile of text line width.
* First, filter the boxes of text, where there may be
* more than one box for a given textline. */
pix2 = pixMorphSequence(pix1, "r11 + c20.1 + o30.1 +c1.3", 0);
if (pixadb) pixaAddPix(pixadb, pix2, L_COPY);
boxa1 = pixConnComp(pix2, NULL, 4);
pixDestroy(&pix1);
pixDestroy(&pix2);
if (boxaGetCount(boxa1) == 0) {
numaDestroy(&naloc);
boxaDestroy(&boxa1);
L_INFO("no compnents after filtering\n", procName);
return NULL;
}
boxa2 = boxaTransform(boxa1, 0, 0, 4., 4.);
boxa3 = boxaSort(boxa2, L_SORT_BY_Y, L_SORT_INCREASING, NULL);
boxaDestroy(&boxa1);
boxaDestroy(&boxa2);
/* Optionally, find the baseline segments */
pta = NULL;
if (ppta) {
pta = ptaCreate(0);
*ppta = pta;
}
if (pta) {
nloc = numaGetCount(naloc);
nbox = boxaGetCount(boxa3);
for (i = 0; i < nbox; i++) {
boxaGetBoxGeometry(boxa3, i, &bx, &by, &bw, &bh);
for (j = 0; j < nloc; j++) {
numaGetIValue(naloc, j, &locval);
if (L_ABS(locval - (by + bh)) > 25)
continue;
ptaAddPt(pta, bx, locval);
ptaAddPt(pta, bx + bw, locval);
break;
}
}
}
boxaDestroy(&boxa3);
if (pixadb && pta) { /* display baselines */
l_int32 npts, x1, y1, x2, y2;
pix1 = pixConvertTo32(pixs);
npts = ptaGetCount(pta);
for (i = 0; i < npts; i += 2) {
ptaGetIPt(pta, i, &x1, &y1);
ptaGetIPt(pta, i + 1, &x2, &y2);
pixRenderLineArb(pix1, x1, y1, x2, y2, 2, 255, 0, 0);
}
pixWrite("/tmp/lept/baseline/baselines.png", pix1, IFF_PNG);
pixaAddPix(pixadb, pixScale(pix1, 0.25, 0.25), L_INSERT);
pixDestroy(&pix1);
}
return naloc;
}
main(int argc,
char **argv)
{
l_int32 i, nbins, ival;
l_float64 pi, angle, val, sum;
L_DNA *da1, *da2, *da3, *da4, *da5;
L_DNAA *daa1, *daa2;
GPLOT *gplot;
NUMA *na, *nahisto, *nax;
L_REGPARAMS *rp;
if (regTestSetup(argc, argv, &rp))
return 1;
pi = 3.1415926535;
da1 = l_dnaCreate(50);
for (i = 0; i < 5000; i++) {
angle = 0.02293 * i * pi;
val = 999. * sin(angle);
l_dnaAddNumber(da1, val);
}
/* Conversion to Numa; I/O for Dna */
na = l_dnaConvertToNuma(da1);
da2 = numaConvertToDna(na);
l_dnaWrite("/tmp/dna1.da", da1);
l_dnaWrite("/tmp/dna2.da", da2);
da3 = l_dnaRead("/tmp/dna2.da");
l_dnaWrite("/tmp/dna3.da", da3);
regTestCheckFile(rp, "/tmp/dna1.da"); /* 0 */
regTestCheckFile(rp, "/tmp/dna2.da"); /* 1 */
regTestCheckFile(rp, "/tmp/dna3.da"); /* 2 */
regTestCompareFiles(rp, 1, 2); /* 3 */
/* I/O for Dnaa */
daa1 = l_dnaaCreate(3);
l_dnaaAddDna(daa1, da1, L_INSERT);
l_dnaaAddDna(daa1, da2, L_INSERT);
l_dnaaAddDna(daa1, da3, L_INSERT);
l_dnaaWrite("/tmp/dnaa1.daa", daa1);
daa2 = l_dnaaRead("/tmp/dnaa1.daa");
l_dnaaWrite("/tmp/dnaa2.daa", daa2);
regTestCheckFile(rp, "/tmp/dnaa1.daa"); /* 4 */
regTestCheckFile(rp, "/tmp/dnaa2.daa"); /* 5 */
regTestCompareFiles(rp, 4, 5); /* 6 */
l_dnaaDestroy(&daa1);
l_dnaaDestroy(&daa2);
/* Just for fun -- is the numa ok? */
nahisto = numaMakeHistogramClipped(na, 12, 2000);
nbins = numaGetCount(nahisto);
nax = numaMakeSequence(0, 1, nbins);
gplot = gplotCreate("/tmp/historoot", GPLOT_PNG, "Histo example",
"i", "histo[i]");
gplotAddPlot(gplot, nax, nahisto, GPLOT_LINES, "sine");
gplotMakeOutput(gplot);
#ifndef _WIN32
sleep(1);
#else
Sleep(1000);
#endif /* _WIN32 */
regTestCheckFile(rp, "/tmp/historoot.png"); /* 7 */
gplotDestroy(&gplot);
numaDestroy(&na);
numaDestroy(&nax);
numaDestroy(&nahisto);
/* Handling precision of int32 in double */
da4 = l_dnaCreate(25);
for (i = 0; i < 1000; i++)
l_dnaAddNumber(da4, 1928374 * i);
l_dnaWrite("/tmp/dna4.da", da4);
da5 = l_dnaRead("/tmp/dna4.da");
sum = 0;
for (i = 0; i < 1000; i++) {
l_dnaGetIValue(da5, i, &ival);
sum += L_ABS(ival - i * 1928374); /* we better be adding 0 each time */
}
regTestCompareValues(rp, sum, 0.0, 0.0); /* 8 */
l_dnaDestroy(&da4);
l_dnaDestroy(&da5);
return regTestCleanup(rp);
}
/*!
* \brief pixGetLocalSkewAngles()
*
* \param[in] pixs 1 bpp
* \param[in] nslices the number of horizontal overlapping slices; must
* be larger than 1 and not exceed 20; 0 for default
* \param[in] redsweep sweep reduction factor: 1, 2, 4 or 8;
* use 0 for default value
* \param[in] redsearch search reduction factor: 1, 2, 4 or 8, and not
* larger than redsweep; use 0 for default value
* \param[in] sweeprange half the full range, assumed about 0; in degrees;
* use 0.0 for default value
* \param[in] sweepdelta angle increment of sweep; in degrees;
* use 0.0 for default value
* \param[in] minbsdelta min binary search increment angle; in degrees;
* use 0.0 for default value
* \param[out] pa [optional] slope of skew as fctn of y
* \param[out] pb [optional] intercept at y=0 of skew as fctn of y
* \param[in] debug 1 for generating plot of skew angle vs. y; 0 otherwise
* \return naskew, or NULL on error
*
* <pre>
* Notes:
* (1) The local skew is measured in a set of overlapping strips.
* We then do a least square linear fit parameters to get
* the slope and intercept parameters a and b in
* skew-angle = a * y + b (degrees)
* for the local skew as a function of raster line y.
* This is then used to make naskew, which can be interpreted
* as the computed skew angle (in degrees) at the left edge
* of each raster line.
* (2) naskew can then be used to find the baselines of text, because
* each text line has a baseline that should intersect
* the left edge of the image with the angle given by this
* array, evaluated at the raster line of intersection.
* </pre>
*/
NUMA *
pixGetLocalSkewAngles(PIX *pixs,
l_int32 nslices,
l_int32 redsweep,
l_int32 redsearch,
l_float32 sweeprange,
l_float32 sweepdelta,
l_float32 minbsdelta,
l_float32 *pa,
l_float32 *pb,
l_int32 debug)
{
l_int32 w, h, hs, i, ystart, yend, ovlap, npts;
l_float32 angle, conf, ycenter, a, b;
BOX *box;
GPLOT *gplot;
NUMA *naskew, *nax, *nay;
PIX *pix;
PTA *pta;
PROCNAME("pixGetLocalSkewAngles");
if (!pixs || pixGetDepth(pixs) != 1)
return (NUMA *)ERROR_PTR("pixs undefined or not 1 bpp", procName, NULL);
if (nslices < 2 || nslices > 20)
nslices = DEFAULT_SLICES;
if (redsweep < 1 || redsweep > 8)
redsweep = DEFAULT_SWEEP_REDUCTION;
if (redsearch < 1 || redsearch > redsweep)
redsearch = DEFAULT_BS_REDUCTION;
if (sweeprange == 0.0)
sweeprange = DEFAULT_SWEEP_RANGE;
if (sweepdelta == 0.0)
sweepdelta = DEFAULT_SWEEP_DELTA;
if (minbsdelta == 0.0)
minbsdelta = DEFAULT_MINBS_DELTA;
pixGetDimensions(pixs, &w, &h, NULL);
hs = h / nslices;
ovlap = (l_int32)(OVERLAP_FRACTION * hs);
pta = ptaCreate(nslices);
for (i = 0; i < nslices; i++) {
ystart = L_MAX(0, hs * i - ovlap);
yend = L_MIN(h - 1, hs * (i + 1) + ovlap);
ycenter = (ystart + yend) / 2;
box = boxCreate(0, ystart, w, yend - ystart + 1);
pix = pixClipRectangle(pixs, box, NULL);
pixFindSkewSweepAndSearch(pix, &angle, &conf, redsweep, redsearch,
sweeprange, sweepdelta, minbsdelta);
if (conf > MIN_ALLOWED_CONFIDENCE)
ptaAddPt(pta, ycenter, angle);
pixDestroy(&pix);
boxDestroy(&box);
}
/* Do linear least squares fit */
if ((npts = ptaGetCount(pta)) < 2) {
ptaDestroy(&pta);
return (NUMA *)ERROR_PTR("can't fit skew", procName, NULL);
}
ptaGetLinearLSF(pta, &a, &b, NULL);
if (pa) *pa = a;
if (pb) *pb = b;
/* Make skew angle array as function of raster line */
naskew = numaCreate(h);
for (i = 0; i < h; i++) {
angle = a * i + b;
numaAddNumber(naskew, angle);
}
if (debug) {
lept_mkdir("lept/baseline");
ptaGetArrays(pta, &nax, &nay);
gplot = gplotCreate("/tmp/lept/baseline/skew", GPLOT_PNG,
"skew as fctn of y", "y (in raster lines from top)",
"angle (in degrees)");
gplotAddPlot(gplot, NULL, naskew, GPLOT_POINTS, "linear lsf");
gplotAddPlot(gplot, nax, nay, GPLOT_POINTS, "actual data pts");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nax);
numaDestroy(&nay);
}
ptaDestroy(&pta);
return naskew;
}
int main(int argc,
char **argv) {
l_int32 i, w, h, d, rotflag;
PIX *pixs, *pixt, *pixd;
l_float32 angle, deg2rad, pops, ang;
char *filein, *fileout;
static char mainName[] = "rotatetest1";
if (argc != 4)
return ERROR_INT(" Syntax: rotatetest1 filein angle fileout",
mainName, 1);
filein = argv[1];
angle = atof(argv[2]);
fileout = argv[3];
deg2rad = 3.1415926535 / 180.;
if ((pixs = pixRead(filein)) == NULL)
return ERROR_INT("pix not made", mainName, 1);
if (pixGetDepth(pixs) == 1) {
pixt = pixScaleToGray3(pixs);
pixDestroy(&pixs);
pixs = pixAddBorderGeneral(pixt, 1, 0, 1, 0, 255);
pixDestroy(&pixt);
}
pixGetDimensions(pixs, &w, &h, &d);
fprintf(stderr, "w = %d, h = %d\n", w, h);
#if 0
/* repertory of rotation operations to choose from */
pixd = pixRotateAM(pixs, deg2rad * angle, L_BRING_IN_WHITE);
pixd = pixRotateAMColor(pixs, deg2rad * angle, 0xffffff00);
pixd = pixRotateAMColorFast(pixs, deg2rad * angle, 255);
pixd = pixRotateAMCorner(pixs, deg2rad * angle, L_BRING_IN_WHITE);
pixd = pixRotateShear(pixs, w /2, h / 2, deg2rad * angle,
L_BRING_IN_WHITE);
pixd = pixRotate3Shear(pixs, w /2, h / 2, deg2rad * angle,
L_BRING_IN_WHITE);
pixRotateShearIP(pixs, w / 2, h / 2, deg2rad * angle); pixd = pixs;
#endif
#if 0
/* timing of shear rotation */
for (i = 0; i < NITERS; i++) {
pixd = pixRotateShear(pixs, (i * w) / NITERS,
(i * h) / NITERS, deg2rad * angle,
L_BRING_IN_WHITE);
pixDisplay(pixd, 100 + 20 * i, 100 + 20 * i);
pixDestroy(&pixd);
}
#endif
#if 0
/* timing of in-place shear rotation */
for (i = 0; i < NITERS; i++) {
pixRotateShearIP(pixs, w/2, h/2, deg2rad * angle, L_BRING_IN_WHITE);
/* pixRotateShearCenterIP(pixs, deg2rad * angle, L_BRING_IN_WHITE); */
pixDisplay(pixs, 100 + 20 * i, 100 + 20 * i);
}
pixd = pixs;
if (pixGetDepth(pixd) == 1)
pixWrite(fileout, pixd, IFF_PNG);
else
pixWrite(fileout, pixd, IFF_JFIF_JPEG);
pixDestroy(&pixs);
#endif
#if 0
/* timing of various rotation operations (choose) */
startTimer();
w = pixGetWidth(pixs);
h = pixGetHeight(pixs);
for (i = 0; i < NTIMES; i++) {
pixd = pixRotateShearCenter(pixs, deg2rad * angle, L_BRING_IN_WHITE);
pixDestroy(&pixd);
}
pops = (l_float32)(w * h * NTIMES / 1000000.) / stopTimer();
fprintf(stderr, "vers. 1, mpops: %f\n", pops);
startTimer();
w = pixGetWidth(pixs);
h = pixGetHeight(pixs);
for (i = 0; i < NTIMES; i++) {
pixRotateShearIP(pixs, w/2, h/2, deg2rad * angle, L_BRING_IN_WHITE);
}
pops = (l_float32)(w * h * NTIMES / 1000000.) / stopTimer();
fprintf(stderr, "shear, mpops: %f\n", pops);
pixWrite(fileout, pixs, IFF_PNG);
for (i = 0; i < NTIMES; i++) {
pixRotateShearIP(pixs, w/2, h/2, -deg2rad * angle, L_BRING_IN_WHITE);
}
pixWrite("/usr/tmp/junkout", pixs, IFF_PNG);
#endif
#if 0
/* area-mapping rotation operations */
pixd = pixRotateAM(pixs, deg2rad * angle, L_BRING_IN_WHITE);
/* pixd = pixRotateAMColorFast(pixs, deg2rad * angle, 255); */
if (pixGetDepth(pixd) == 1)
pixWrite(fileout, pixd, IFF_PNG);
else
pixWrite(fileout, pixd, IFF_JFIF_JPEG);
#endif
#if 0
/* compare the standard area-map color rotation with
* the fast area-map color rotation, on a pixel basis */
{
PIX *pix1, *pix2;
NUMA *nar, *nag, *nab, *naseq;
GPLOT *gplot;
startTimer();
pix1 = pixRotateAMColor(pixs, 0.12, 0xffffff00);
fprintf(stderr, " standard color rotate: %7.2f sec\n", stopTimer());
pixWrite("junkcolor1", pix1, IFF_JFIF_JPEG);
startTimer();
pix2 = pixRotateAMColorFast(pixs, 0.12, 0xffffff00);
fprintf(stderr, " fast color rotate: %7.2f sec\n", stopTimer());
pixWrite("junkcolor2", pix2, IFF_JFIF_JPEG);
pixd = pixAbsDifference(pix1, pix2);
pixGetColorHistogram(pixd, 1, &nar, &nag, &nab);
naseq = numaMakeSequence(0., 1., 256);
gplot = gplotCreate("junk_absdiff", GPLOT_X11, "Number vs diff",
"diff", "number");
gplotAddPlot(gplot, naseq, nar, GPLOT_POINTS, "red");
gplotAddPlot(gplot, naseq, nag, GPLOT_POINTS, "green");
gplotAddPlot(gplot, naseq, nab, GPLOT_POINTS, "blue");
gplotMakeOutput(gplot);
pixDestroy(&pix1);
pixDestroy(&pix2);
pixDestroy(&pixd);
numaDestroy(&nar);
numaDestroy(&nag);
numaDestroy(&nab);
numaDestroy(&naseq);
gplotDestroy(&gplot);
}
#endif
/* Do a succession of 180 7-degree rotations in a cw
* direction, and unwind the result with another set in
* a ccw direction. Although there is a considerable amount
* of distortion after successive rotations, after all
* 360 rotations, the resulting image is restored to
* its original pristine condition! */
#if 1
rotflag = L_ROTATE_AREA_MAP;
/* rotflag = L_ROTATE_SHEAR; */
/* rotflag = L_ROTATE_SAMPLING; */
ang = 7.0 * deg2rad;
pixGetDimensions(pixs, &w, &h, NULL);
pixd = pixRotate(pixs, ang, rotflag, L_BRING_IN_WHITE, w, h);
pixWrite("junkrot7", pixd, IFF_PNG);
for (i = 1; i < 180; i++) {
pixs = pixd;
pixd = pixRotate(pixs, ang, rotflag, L_BRING_IN_WHITE, w, h);
if ((i % 30) == 0) pixDisplay(pixd, 600, 0);
pixDestroy(&pixs);
}
pixWrite("junkspin", pixd, IFF_PNG);
pixDisplay(pixd, 0, 0);
for (i = 0; i < 180; i++) {
pixs = pixd;
pixd = pixRotate(pixs, -ang, rotflag, L_BRING_IN_WHITE, w, h);
if (i && (i % 30) == 0) pixDisplay(pixd, 600, 500);
pixDestroy(&pixs);
}
pixWrite("junkunspin", pixd, IFF_PNG);
pixDisplay(pixd, 0, 500);
pixDestroy(&pixd);
#endif
return 0;
}
main(int argc,
char **argv)
{
char *filein, *fileout;
char bigbuf[512];
l_int32 iplot;
l_float32 gam;
l_float64 gamma[NPLOTS] = {.5, 1.0, 1.5, 2.0, 2.5};
GPLOT *gplot;
NUMA *na, *nax;
PIX *pixs, *pixd;
static char mainName[] = "gammatest";
if (argc != 4)
exit(ERROR_INT(" Syntax: gammatest filein gam fileout", mainName, 1));
filein = argv[1];
gam = atof(argv[2]);
fileout = argv[3];
if ((pixs = pixRead(filein)) == NULL)
exit(ERROR_INT("pixs not made", mainName, 1));
#if 1
startTimer();
pixGammaTRC(pixs, pixs, gam, MINVAL, MAXVAL);
fprintf(stderr, "Time for gamma: %7.3f sec\n", stopTimer());
pixWrite(fileout, pixs, IFF_JFIF_JPEG);
pixDestroy(&pixs);
#endif
#if 0
startTimer();
pixd = pixGammaTRC(NULL, pixs, gam, MINVAL, MAXVAL);
fprintf(stderr, "Time for gamma: %7.3f sec\n", stopTimer());
pixWrite(fileout, pixd, IFF_JFIF_JPEG);
pixDestroy(&pixs);
pixDestroy(&pixd);
#endif
na = numaGammaTRC(gam, MINVAL, MAXVAL);
gplotSimple1(na, GPLOT_X11, "/tmp/junkroot", "gamma trc");
numaDestroy(&na);
#if 1 /* plot gamma TRC maps */
gplot = gplotCreate("/tmp/junkmap", GPLOT_X11,
"Mapping function for gamma correction",
"value in", "value out");
nax = numaMakeSequence(0.0, 1.0, 256);
for (iplot = 0; iplot < NPLOTS; iplot++) {
na = numaGammaTRC(gamma[iplot], 30, 215);
sprintf(bigbuf, "gamma = %3.1f", gamma[iplot]);
gplotAddPlot(gplot, nax, na, GPLOT_LINES, bigbuf);
numaDestroy(&na);
}
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nax);
#endif
return 0;
}
int main(int argc,
char **argv)
{
l_int32 type, comptype, d1, d2, same, first, last;
l_float32 fract, diff, rmsdiff;
char *filein1, *filein2, *fileout;
GPLOT *gplot;
NUMA *na1, *na2;
PIX *pixs1, *pixs2, *pixd;
static char mainName[] = "comparetest";
if (argc != 5)
return ERROR_INT(" Syntax: comparetest filein1 filein2 type fileout",
mainName, 1);
filein1 = argv[1];
filein2 = argv[2];
type = atoi(argv[3]);
pixd = NULL;
fileout = argv[4];
l_pngSetReadStrip16To8(0);
if ((pixs1 = pixRead(filein1)) == NULL)
return ERROR_INT("pixs1 not made", mainName, 1);
if ((pixs2 = pixRead(filein2)) == NULL)
return ERROR_INT("pixs2 not made", mainName, 1);
d1 = pixGetDepth(pixs1);
d2 = pixGetDepth(pixs2);
if (d1 == 1 && d2 == 1) {
pixEqual(pixs1, pixs2, &same);
if (same) {
fprintf(stderr, "Images are identical\n");
pixd = pixCreateTemplate(pixs1); /* write empty pix for diff */
}
else {
if (type == 0)
comptype = L_COMPARE_XOR;
else
comptype = L_COMPARE_SUBTRACT;
pixCompareBinary(pixs1, pixs2, comptype, &fract, &pixd);
fprintf(stderr, "Fraction of different pixels: %10.6f\n", fract);
}
pixWrite(fileout, pixd, IFF_PNG);
}
else {
if (type == 0)
comptype = L_COMPARE_ABS_DIFF;
else
comptype = L_COMPARE_SUBTRACT;
pixCompareGrayOrRGB(pixs1, pixs2, comptype, GPLOT_X11, &same, &diff,
&rmsdiff, &pixd);
if (type == 0) {
if (same)
fprintf(stderr, "Images are identical\n");
else {
fprintf(stderr, "Images differ: <diff> = %10.6f\n", diff);
fprintf(stderr, " <rmsdiff> = %10.6f\n", rmsdiff);
}
}
else { /* subtraction */
if (same)
fprintf(stderr, "pixs2 strictly greater than pixs1\n");
else {
fprintf(stderr, "Images differ: <diff> = %10.6f\n", diff);
fprintf(stderr, " <rmsdiff> = %10.6f\n", rmsdiff);
}
}
if (d1 != 16)
pixWrite(fileout, pixd, IFF_JFIF_JPEG);
else
pixWrite(fileout, pixd, IFF_PNG);
if (d1 != 16 && !same) {
na1 = pixCompareRankDifference(pixs1, pixs2, 1);
if (na1) {
fprintf(stderr, "na1[150] = %20.10f\n", na1->array[150]);
fprintf(stderr, "na1[200] = %20.10f\n", na1->array[200]);
fprintf(stderr, "na1[250] = %20.10f\n", na1->array[250]);
numaGetNonzeroRange(na1, 0.00005, &first, &last);
fprintf(stderr, "Nonzero diff range: first = %d, last = %d\n",
first, last);
na2 = numaClipToInterval(na1, first, last);
gplot = gplotCreate("/tmp/junkrank", GPLOT_X11,
"Pixel Rank Difference", "pixel val",
"rank");
gplotAddPlot(gplot, NULL, na2, GPLOT_LINES, "rank");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&na1);
numaDestroy(&na2);
}
}
}
pixDestroy(&pixs1);
pixDestroy(&pixs2);
pixDestroy(&pixd);
return 0;
}
int main(int argc,
char **argv)
{
l_int32 i, n, binsize, binstart, nbins;
l_float32 pi, val, angle, xval, yval, x0, y0, startval, fbinsize;
l_float32 minval, maxval, meanval, median, variance, rankval, rank, rmsdev;
GPLOT *gplot;
NUMA *na, *nahisto, *nax, *nay, *nap, *nasx, *nasy;
NUMA *nadx, *nady, *nafx, *nafy, *na1, *na2, *na3, *na4;
PIX *pixs, *pix1, *pix2, *pix3, *pix4, *pix5, *pix6, *pix7, *pixd;
PIXA *pixa;
L_REGPARAMS *rp;
if (regTestSetup(argc, argv, &rp))
return 1;
lept_mkdir("lept/numa1");
/* -------------------------------------------------------------------*
* Histograms *
* -------------------------------------------------------------------*/
pi = 3.1415926535;
na = numaCreate(5000);
for (i = 0; i < 500000; i++) {
angle = 0.02293 * i * pi;
val = (l_float32)(999. * sin(angle));
numaAddNumber(na, val);
}
nahisto = numaMakeHistogramClipped(na, 6, 2000);
nbins = numaGetCount(nahisto);
nax = numaMakeSequence(0, 1, nbins);
gplot = gplotCreate("/tmp/lept/numa1/histo1", GPLOT_PNG, "example histo 1",
"i", "histo[i]");
gplotAddPlot(gplot, nax, nahisto, GPLOT_LINES, "sine");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nax);
numaDestroy(&nahisto);
nahisto = numaMakeHistogram(na, 1000, &binsize, &binstart);
nbins = numaGetCount(nahisto);
nax = numaMakeSequence(binstart, binsize, nbins);
fprintf(stderr, " binsize = %d, binstart = %d\n", binsize, binstart);
gplot = gplotCreate("/tmp/lept/numa1/histo2", GPLOT_PNG, "example histo 2",
"i", "histo[i]");
gplotAddPlot(gplot, nax, nahisto, GPLOT_LINES, "sine");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nax);
numaDestroy(&nahisto);
nahisto = numaMakeHistogram(na, 1000, &binsize, NULL);
nbins = numaGetCount(nahisto);
nax = numaMakeSequence(0, binsize, nbins);
fprintf(stderr, " binsize = %d, binstart = %d\n", binsize, 0);
gplot = gplotCreate("/tmp/lept/numa1/histo3", GPLOT_PNG, "example histo 3",
"i", "histo[i]");
gplotAddPlot(gplot, nax, nahisto, GPLOT_LINES, "sine");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nax);
numaDestroy(&nahisto);
nahisto = numaMakeHistogramAuto(na, 1000);
nbins = numaGetCount(nahisto);
numaGetParameters(nahisto, &startval, &fbinsize);
nax = numaMakeSequence(startval, fbinsize, nbins);
fprintf(stderr, " binsize = %7.4f, binstart = %8.3f\n",
fbinsize, startval);
gplot = gplotCreate("/tmp/lept/numa1/histo4", GPLOT_PNG, "example histo 4",
"i", "histo[i]");
gplotAddPlot(gplot, nax, nahisto, GPLOT_LINES, "sine");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
pix1 = pixRead("/tmp/lept/numa1/histo1.png");
pix2 = pixRead("/tmp/lept/numa1/histo2.png");
pix3 = pixRead("/tmp/lept/numa1/histo3.png");
pix4 = pixRead("/tmp/lept/numa1/histo4.png");
regTestWritePixAndCheck(rp, pix1, IFF_PNG); /* 0 */
regTestWritePixAndCheck(rp, pix2, IFF_PNG); /* 1 */
regTestWritePixAndCheck(rp, pix3, IFF_PNG); /* 2 */
regTestWritePixAndCheck(rp, pix4, IFF_PNG); /* 3 */
pixa = pixaCreate(4);
pixaAddPix(pixa, pix1, L_INSERT);
pixaAddPix(pixa, pix2, L_INSERT);
pixaAddPix(pixa, pix3, L_INSERT);
pixaAddPix(pixa, pix4, L_INSERT);
if (rp->display) {
pixd = pixaDisplayTiledInRows(pixa, 32, 1500, 1.0, 0, 20, 2);
pixDisplayWithTitle(pixd, 0, 0, NULL, 1);
pixDestroy(&pixd);
}
pixaDestroy(&pixa);
numaDestroy(&nax);
numaDestroy(&nahisto);
numaGetStatsUsingHistogram(na, 2000, &minval, &maxval, &meanval,
&variance, &median, 0.80, &rankval, &nahisto);
rmsdev = sqrt((l_float64)variance);
numaHistogramGetRankFromVal(nahisto, rankval, &rank);
regTestCompareValues(rp, -999.00, minval, 0.1); /* 4 */
regTestCompareValues(rp, 999.00, maxval, 0.1); /* 5 */
regTestCompareValues(rp, 0.055, meanval, 0.001); /* 6 */
regTestCompareValues(rp, 0.30, median, 0.005); /* 7 */
regTestCompareValues(rp, 706.41, rmsdev, 0.1); /* 8 */
regTestCompareValues(rp, 808.15, rankval, 0.1); /* 9 */
regTestCompareValues(rp, 0.800, rank, 0.01); /* 10 */
if (rp->display) {
fprintf(stderr, "Sin histogram: \n"
" min val = %7.3f -- should be -999.00\n"
" max val = %7.3f -- should be 999.00\n"
" mean val = %7.3f -- should be 0.055\n"
" median = %7.3f -- should be 0.30\n"
" rmsdev = %7.3f -- should be 706.41\n"
" rank val = %7.3f -- should be 808.152\n"
" rank = %7.3f -- should be 0.800\n",
minval, maxval, meanval, median, rmsdev, rankval, rank);
}
numaDestroy(&nahisto);
numaDestroy(&na);
/* -------------------------------------------------------------------*
* Interpolation *
* -------------------------------------------------------------------*/
/* Test numaInterpolateEqxInterval() */
pixs = pixRead("test8.jpg");
na = pixGetGrayHistogramMasked(pixs, NULL, 0, 0, 1);
nasy = numaGetPartialSums(na);
gplotSimple1(nasy, GPLOT_PNG, "/tmp/lept/numa1/int1", "partial sums");
gplotSimple1(na, GPLOT_PNG, "/tmp/lept/numa1/int2", "simple test");
numaInterpolateEqxInterval(0.0, 1.0, na, L_LINEAR_INTERP,
0.0, 255.0, 15, &nax, &nay);
gplot = gplotCreate("/tmp/lept/numa1/int3", GPLOT_PNG, "test interpolation",
"pix val", "num pix");
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, "plot 1");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&na);
numaDestroy(&nasy);
numaDestroy(&nax);
numaDestroy(&nay);
pixDestroy(&pixs);
/* Test numaInterpolateArbxInterval() */
pixs = pixRead("test8.jpg");
na = pixGetGrayHistogramMasked(pixs, NULL, 0, 0, 1);
nasy = numaGetPartialSums(na);
numaInsertNumber(nasy, 0, 0.0);
nasx = numaMakeSequence(0.0, 1.0, 257);
numaInterpolateArbxInterval(nasx, nasy, L_LINEAR_INTERP,
10.0, 250.0, 23, &nax, &nay);
gplot = gplotCreate("/tmp/lept/numa1/int4", GPLOT_PNG, "arbx interpolation",
"pix val", "cum num pix");
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, "plot 1");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&na);
numaDestroy(&nasx);
numaDestroy(&nasy);
numaDestroy(&nax);
numaDestroy(&nay);
pixDestroy(&pixs);
/* Test numaInterpolateArbxVal() */
pixs = pixRead("test8.jpg");
na = pixGetGrayHistogramMasked(pixs, NULL, 0, 0, 1);
nasy = numaGetPartialSums(na);
numaInsertNumber(nasy, 0, 0.0);
nasx = numaMakeSequence(0.0, 1.0, 257);
nax = numaMakeSequence(15.0, (250.0 - 15.0) / 23.0, 24);
n = numaGetCount(nax);
nay = numaCreate(n);
for (i = 0; i < n; i++) {
numaGetFValue(nax, i, &xval);
numaInterpolateArbxVal(nasx, nasy, L_QUADRATIC_INTERP, xval, &yval);
numaAddNumber(nay, yval);
}
gplot = gplotCreate("/tmp/lept/numa1/int5", GPLOT_PNG, "arbx interpolation",
"pix val", "cum num pix");
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, "plot 1");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&na);
numaDestroy(&nasx);
numaDestroy(&nasy);
numaDestroy(&nax);
numaDestroy(&nay);
pixDestroy(&pixs);
/* Test interpolation */
nasx = numaRead("testangle.na");
nasy = numaRead("testscore.na");
gplot = gplotCreate("/tmp/lept/numa1/int6", GPLOT_PNG, "arbx interpolation",
"angle", "score");
numaInterpolateArbxInterval(nasx, nasy, L_LINEAR_INTERP,
-2.00, 0.0, 50, &nax, &nay);
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, "linear");
numaDestroy(&nax);
numaDestroy(&nay);
numaInterpolateArbxInterval(nasx, nasy, L_QUADRATIC_INTERP,
-2.00, 0.0, 50, &nax, &nay);
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, "quadratic");
numaDestroy(&nax);
numaDestroy(&nay);
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
gplot = gplotCreate("/tmp/lept/numa1/int7", GPLOT_PNG, "arbx interpolation",
"angle", "score");
numaInterpolateArbxInterval(nasx, nasy, L_LINEAR_INTERP,
-1.2, -0.8, 50, &nax, &nay);
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, "quadratic");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaFitMax(nay, &yval, nax, &xval);
if (rp->display) fprintf(stderr, "max = %f at loc = %f\n", yval, xval);
pixa = pixaCreate(7);
pix1 = pixRead("/tmp/lept/numa1/int1.png");
pix2 = pixRead("/tmp/lept/numa1/int2.png");
pix3 = pixRead("/tmp/lept/numa1/int3.png");
pix4 = pixRead("/tmp/lept/numa1/int4.png");
pix5 = pixRead("/tmp/lept/numa1/int5.png");
pix6 = pixRead("/tmp/lept/numa1/int6.png");
pix7 = pixRead("/tmp/lept/numa1/int7.png");
regTestWritePixAndCheck(rp, pix1, IFF_PNG); /* 11 */
regTestWritePixAndCheck(rp, pix2, IFF_PNG); /* 12 */
regTestWritePixAndCheck(rp, pix3, IFF_PNG); /* 13 */
regTestWritePixAndCheck(rp, pix4, IFF_PNG); /* 14 */
regTestWritePixAndCheck(rp, pix5, IFF_PNG); /* 15 */
regTestWritePixAndCheck(rp, pix6, IFF_PNG); /* 16 */
regTestWritePixAndCheck(rp, pix7, IFF_PNG); /* 17 */
pixaAddPix(pixa, pix1, L_INSERT);
pixaAddPix(pixa, pix2, L_INSERT);
pixaAddPix(pixa, pix3, L_INSERT);
pixaAddPix(pixa, pix4, L_INSERT);
pixaAddPix(pixa, pix5, L_INSERT);
pixaAddPix(pixa, pix6, L_INSERT);
pixaAddPix(pixa, pix7, L_INSERT);
if (rp->display) {
pixd = pixaDisplayTiledInRows(pixa, 32, 1500, 1.0, 0, 20, 2);
pixDisplayWithTitle(pixd, 300, 0, NULL, 1);
pixDestroy(&pixd);
}
pixaDestroy(&pixa);
numaDestroy(&nasx);
numaDestroy(&nasy);
numaDestroy(&nax);
numaDestroy(&nay);
/* -------------------------------------------------------------------*
* Integration and differentiation *
* -------------------------------------------------------------------*/
/* Test integration and differentiation */
nasx = numaRead("testangle.na");
nasy = numaRead("testscore.na");
/* ---------- Plot the derivative ---------- */
numaDifferentiateInterval(nasx, nasy, -2.0, 0.0, 50, &nadx, &nady);
gplot = gplotCreate("/tmp/lept/numa1/diff1", GPLOT_PNG, "derivative",
"angle", "slope");
gplotAddPlot(gplot, nadx, nady, GPLOT_LINES, "derivative");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
/* ---------- Plot the original function ----------- */
/* and the integral of the derivative; the two */
/* should be approximately the same. */
gplot = gplotCreate("/tmp/lept/numa1/diff2", GPLOT_PNG, "integ-diff",
"angle", "val");
numaInterpolateArbxInterval(nasx, nasy, L_LINEAR_INTERP,
-2.00, 0.0, 50, &nafx, &nafy);
gplotAddPlot(gplot, nafx, nafy, GPLOT_LINES, "function");
n = numaGetCount(nadx);
numaGetFValue(nafx, 0, &x0);
numaGetFValue(nafy, 0, &y0);
nay = numaCreate(n);
/* (Note: this tests robustness of the integrator: we go from
* i = 0, and choose to have only 1 point in the interpolation
* there, which is too small and causes the function to bomb out.) */
fprintf(stderr, "We must get a 'npts < 2' error here:\n");
for (i = 0; i < n; i++) {
numaGetFValue(nadx, i, &xval);
numaIntegrateInterval(nadx, nady, x0, xval, 2 * i + 1, &yval);
numaAddNumber(nay, y0 + yval);
}
gplotAddPlot(gplot, nafx, nay, GPLOT_LINES, "anti-derivative");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
pixa = pixaCreate(2);
pix1 = pixRead("/tmp/lept/numa1/diff1.png");
pix2 = pixRead("/tmp/lept/numa1/diff2.png");
regTestWritePixAndCheck(rp, pix1, IFF_PNG); /* 18 */
regTestWritePixAndCheck(rp, pix2, IFF_PNG); /* 19 */
pixaAddPix(pixa, pix1, L_INSERT);
pixaAddPix(pixa, pix2, L_INSERT);
if (rp->display) {
pixd = pixaDisplayTiledInRows(pixa, 32, 1500, 1.0, 0, 20, 2);
pixDisplayWithTitle(pixd, 600, 0, NULL, 1);
pixDestroy(&pixd);
}
pixaDestroy(&pixa);
numaDestroy(&nasx);
numaDestroy(&nasy);
numaDestroy(&nafx);
numaDestroy(&nafy);
numaDestroy(&nadx);
numaDestroy(&nady);
numaDestroy(&nay);
/* -------------------------------------------------------------------*
* Rank extraction *
* -------------------------------------------------------------------*/
/* Rank extraction with interpolation */
pixs = pixRead("test8.jpg");
nasy= pixGetGrayHistogramMasked(pixs, NULL, 0, 0, 1);
numaMakeRankFromHistogram(0.0, 1.0, nasy, 350, &nax, &nay);
gplot = gplotCreate("/tmp/lept/numa1/rank1", GPLOT_PNG,
"test rank extractor", "pix val", "rank val");
gplotAddPlot(gplot, nax, nay, GPLOT_LINES, "plot 1");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nasy);
numaDestroy(&nax);
numaDestroy(&nay);
pixDestroy(&pixs);
/* Rank extraction, point by point */
pixs = pixRead("test8.jpg");
nap = numaCreate(200);
pixGetRankValueMasked(pixs, NULL, 0, 0, 2, 0.0, &val, &na);
for (i = 0; i < 101; i++) {
rank = 0.01 * i;
numaHistogramGetValFromRank(na, rank, &val);
numaAddNumber(nap, val);
}
gplotSimple1(nap, GPLOT_PNG, "/tmp/lept/numa1/rank2", "rank value");
pixa = pixaCreate(2);
pix1 = pixRead("/tmp/lept/numa1/rank1.png");
pix2 = pixRead("/tmp/lept/numa1/rank2.png");
regTestWritePixAndCheck(rp, pix1, IFF_PNG); /* 20 */
regTestWritePixAndCheck(rp, pix2, IFF_PNG); /* 21 */
pixaAddPix(pixa, pix1, L_INSERT);
pixaAddPix(pixa, pix2, L_INSERT);
if (rp->display) {
pixd = pixaDisplayTiledInRows(pixa, 32, 1500, 1.0, 0, 20, 2);
pixDisplayWithTitle(pixd, 900, 0, NULL, 1);
pixDestroy(&pixd);
}
pixaDestroy(&pixa);
numaDestroy(&na);
numaDestroy(&nap);
pixDestroy(&pixs);
/* -------------------------------------------------------------------*
* Numa-morphology *
* -------------------------------------------------------------------*/
na = numaRead("lyra.5.na");
gplotSimple1(na, GPLOT_PNG, "/tmp/lept/numa1/lyra1", "Original");
na1 = numaErode(na, 21);
gplotSimple1(na1, GPLOT_PNG, "/tmp/lept/numa1/lyra2", "Erosion");
na2 = numaDilate(na, 21);
gplotSimple1(na2, GPLOT_PNG, "/tmp/lept/numa1/lyra3", "Dilation");
na3 = numaOpen(na, 21);
gplotSimple1(na3, GPLOT_PNG, "/tmp/lept/numa1/lyra4", "Opening");
na4 = numaClose(na, 21);
gplotSimple1(na4, GPLOT_PNG, "/tmp/lept/numa1/lyra5", "Closing");
pixa = pixaCreate(2);
pix1 = pixRead("/tmp/lept/numa1/lyra1.png");
pix2 = pixRead("/tmp/lept/numa1/lyra2.png");
pix3 = pixRead("/tmp/lept/numa1/lyra3.png");
pix4 = pixRead("/tmp/lept/numa1/lyra4.png");
pix5 = pixRead("/tmp/lept/numa1/lyra5.png");
pixaAddPix(pixa, pix1, L_INSERT);
pixaAddPix(pixa, pix2, L_INSERT);
pixaAddPix(pixa, pix3, L_INSERT);
pixaAddPix(pixa, pix4, L_INSERT);
pixaAddPix(pixa, pix5, L_INSERT);
regTestWritePixAndCheck(rp, pix1, IFF_PNG); /* 22 */
regTestWritePixAndCheck(rp, pix2, IFF_PNG); /* 23 */
regTestWritePixAndCheck(rp, pix3, IFF_PNG); /* 24 */
regTestWritePixAndCheck(rp, pix4, IFF_PNG); /* 25 */
regTestWritePixAndCheck(rp, pix5, IFF_PNG); /* 26 */
if (rp->display) {
pixd = pixaDisplayTiledInRows(pixa, 32, 1500, 1.0, 0, 20, 2);
pixDisplayWithTitle(pixd, 1200, 0, NULL, 1);
pixDestroy(&pixd);
}
pixaDestroy(&pixa);
numaDestroy(&na);
numaDestroy(&na1);
numaDestroy(&na2);
numaDestroy(&na3);
numaDestroy(&na4);
pixaDestroy(&pixa);
return regTestCleanup(rp);
}
main(int argc,
char **argv)
{
PIX *pixs;
l_int32 d;
static char mainName[] = "scaletest2";
if (argc != 2)
return ERROR_INT(" Syntax: scaletest2 filein", mainName, 1);
if ((pixs = pixRead(argv[1])) == NULL)
return ERROR_INT("pixs not made", mainName, 1);
d = pixGetDepth(pixs);
#if 1
/* Integer scale-to-gray functions */
if (d == 1)
{
PIX *pixd;
pixd = pixScaleToGray2(pixs);
pixWrite("/tmp/s2g_2x", pixd, IFF_PNG);
pixDestroy(&pixd);
pixd = pixScaleToGray3(pixs);
pixWrite("/tmp/s2g_3x", pixd, IFF_PNG);
pixDestroy(&pixd);
pixd = pixScaleToGray4(pixs);
pixWrite("/tmp/s2g_4x", pixd, IFF_PNG);
pixDestroy(&pixd);
pixd = pixScaleToGray6(pixs);
pixWrite("/tmp/s2g_6x", pixd, IFF_PNG);
pixDestroy(&pixd);
pixd = pixScaleToGray8(pixs);
pixWrite("/tmp/s2g_8x", pixd, IFF_PNG);
pixDestroy(&pixd);
pixd = pixScaleToGray16(pixs);
pixWrite("/tmp/s2g_16x", pixd, IFF_PNG);
pixDestroy(&pixd);
}
#endif
#if 1
/* Various non-integer scale-to-gray, compared with
* with different ways of getting similar results */
if (d == 1)
{
PIX *pixt, *pixd;
pixd = pixScaleToGray8(pixs);
pixWrite("/tmp/s2g_8.png", pixd, IFF_PNG);
pixDestroy(&pixd);
pixd = pixScaleToGray(pixs, 0.124);
pixWrite("/tmp/s2g_124.png", pixd, IFF_PNG);
pixDestroy(&pixd);
pixd = pixScaleToGray(pixs, 0.284);
pixWrite("/tmp/s2g_284.png", pixd, IFF_PNG);
pixDestroy(&pixd);
pixt = pixScaleToGray4(pixs);
pixd = pixScaleBySampling(pixt, 284./250., 284./250.);
pixWrite("/tmp/s2g_284.2.png", pixd, IFF_PNG);
pixDestroy(&pixt);
pixDestroy(&pixd);
pixt = pixScaleToGray4(pixs);
pixd = pixScaleGrayLI(pixt, 284./250., 284./250.);
pixWrite("/tmp/s2g_284.3.png", pixd, IFF_PNG);
pixDestroy(&pixt);
pixDestroy(&pixd);
pixt = pixScaleBinary(pixs, 284./250., 284./250.);
pixd = pixScaleToGray4(pixt);
pixWrite("/tmp/s2g_284.4.png", pixd, IFF_PNG);
pixDestroy(&pixt);
pixDestroy(&pixd);
pixt = pixScaleToGray4(pixs);
pixd = pixScaleGrayLI(pixt, 0.49, 0.49);
pixWrite("/tmp/s2g_42.png", pixd, IFF_PNG);
pixDestroy(&pixt);
pixDestroy(&pixd);
pixt = pixScaleToGray4(pixs);
pixd = pixScaleSmooth(pixt, 0.49, 0.49);
pixWrite("/tmp/s2g_4sm.png", pixd, IFF_PNG);
pixDestroy(&pixt);
pixDestroy(&pixd);
pixt = pixScaleBinary(pixs, .16/.125, .16/.125);
pixd = pixScaleToGray8(pixt);
pixWrite("/tmp/s2g_16.png", pixd, IFF_PNG);
pixDestroy(&pixt);
pixDestroy(&pixd);
pixd = pixScaleToGray(pixs, .16);
pixWrite("/tmp/s2g_16.2.png", pixd, IFF_PNG);
pixDestroy(&pixd);
}
#endif
#if 1
/* Antialiased (smoothed) reduction, along with sharpening */
if (d != 1)
{
PIX *pixt1, *pixt2;
startTimer();
pixt1 = pixScaleSmooth(pixs, 0.154, 0.154);
fprintf(stderr, "fast scale: %5.3f sec\n", stopTimer());
pixDisplayWithTitle(pixt1, 0, 0, "smooth scaling", DISPLAY);
pixWrite("/tmp/smooth1.png", pixt1, IFF_PNG);
pixt2 = pixUnsharpMasking(pixt1, 1, 0.3);
pixWrite("/tmp/smooth2.png", pixt2, IFF_PNG);
pixDisplayWithTitle(pixt2, 200, 0, "sharp scaling", DISPLAY);
pixDestroy(&pixt1);
pixDestroy(&pixt2);
}
#endif
#if 1
/* Test a large range of scale-to-gray reductions */
if (d == 1)
{
l_int32 i;
l_float32 scale;
PIX *pixd;
for (i = 2; i < 15; i++) {
scale = 1. / (l_float32)i;
startTimer();
pixd = pixScaleToGray(pixs, scale);
fprintf(stderr, "Time for scale %7.3f: %7.3f sec\n",
scale, stopTimer());
pixDisplayWithTitle(pixd, 75 * i, 100, "scaletogray", DISPLAY);
pixDestroy(&pixd);
}
for (i = 8; i < 14; i++) {
scale = 1. / (l_float32)(2 * i);
startTimer();
pixd = pixScaleToGray(pixs, scale);
fprintf(stderr, "Time for scale %7.3f: %7.3f sec\n",
scale, stopTimer());
pixDisplayWithTitle(pixd, 100 * i, 600, "scaletogray", DISPLAY);
pixDestroy(&pixd);
}
}
#endif
#if 1
/* Test the same range of scale-to-gray mipmap reductions */
if (d == 1)
{
l_int32 i;
l_float32 scale;
PIX *pixd;
for (i = 2; i < 15; i++) {
scale = 1. / (l_float32)i;
startTimer();
pixd = pixScaleToGrayMipmap(pixs, scale);
fprintf(stderr, "Time for scale %7.3f: %7.3f sec\n",
scale, stopTimer());
pixDisplayWithTitle(pixd, 75 * i, 100, "scale mipmap", DISPLAY);
pixDestroy(&pixd);
}
for (i = 8; i < 12; i++) {
scale = 1. / (l_float32)(2 * i);
startTimer();
pixd = pixScaleToGrayMipmap(pixs, scale);
fprintf(stderr, "Time for scale %7.3f: %7.3f sec\n",
scale, stopTimer());
pixDisplayWithTitle(pixd, 100 * i, 600, "scale mipmap", DISPLAY);
pixDestroy(&pixd);
}
}
#endif
#if 1
/* Test several methods for antialiased reduction,
* along with sharpening */
if (d != 1)
{
PIX *pixt1, *pixt2, *pixt3, *pixt4, *pixt5, *pixt6, *pixt7;
l_float32 SCALING = 0.27;
l_int32 SIZE = 7;
l_int32 smooth;
l_float32 FRACT = 1.0;
smooth = SIZE / 2;
startTimer();
pixt1 = pixScaleSmooth(pixs, SCALING, SCALING);
fprintf(stderr, "fast scale: %5.3f sec\n", stopTimer());
pixDisplayWithTitle(pixt1, 0, 0, "smooth scaling", DISPLAY);
pixWrite("/tmp/sm_1.png", pixt1, IFF_PNG);
pixt2 = pixUnsharpMasking(pixt1, 1, 0.3);
pixDisplayWithTitle(pixt2, 150, 0, "sharpened scaling", DISPLAY);
startTimer();
pixt3 = pixBlockconv(pixs, smooth, smooth);
pixt4 = pixScaleBySampling(pixt3, SCALING, SCALING);
fprintf(stderr, "slow scale: %5.3f sec\n", stopTimer());
pixDisplayWithTitle(pixt4, 200, 200, "sampled scaling", DISPLAY);
pixWrite("/tmp/sm_2.png", pixt4, IFF_PNG);
startTimer();
pixt5 = pixUnsharpMasking(pixs, smooth, FRACT);
pixt6 = pixBlockconv(pixt5, smooth, smooth);
pixt7 = pixScaleBySampling(pixt6, SCALING, SCALING);
fprintf(stderr, "very slow scale + sharp: %5.3f sec\n", stopTimer());
pixDisplayWithTitle(pixt7, 500, 200, "sampled scaling", DISPLAY);
pixWrite("/tmp/sm_3.jpg", pixt7, IFF_JFIF_JPEG);
pixDestroy(&pixt1);
pixDestroy(&pixt2);
pixDestroy(&pixt3);
pixDestroy(&pixt4);
pixDestroy(&pixt5);
pixDestroy(&pixt6);
pixDestroy(&pixt7);
}
#endif
#if 1
/* Test the color scaling function, comparing the
* special case of scaling factor 2.0 with the
* general case. */
if (d == 32)
{
PIX *pix1, *pix2, *pixd;
NUMA *nar, *nag, *nab, *naseq;
GPLOT *gplot;
startTimer();
pix1 = pixScaleColorLI(pixs, 2.00001, 2.0);
fprintf(stderr, " Time with regular LI: %7.3f\n", stopTimer());
pixWrite("/tmp/color1.jpg", pix1, IFF_JFIF_JPEG);
startTimer();
pix2 = pixScaleColorLI(pixs, 2.0, 2.0);
fprintf(stderr, " Time with 2x LI: %7.3f\n", stopTimer());
pixWrite("/tmp/color2.jpg", pix2, IFF_JFIF_JPEG);
pixd = pixAbsDifference(pix1, pix2);
pixGetColorHistogram(pixd, 1, &nar, &nag, &nab);
naseq = numaMakeSequence(0., 1., 256);
gplot = gplotCreate("/tmp/plot_absdiff", GPLOT_X11, "Number vs diff",
"diff", "number");
gplotSetScaling(gplot, GPLOT_LOG_SCALE_Y);
gplotAddPlot(gplot, naseq, nar, GPLOT_POINTS, "red");
gplotAddPlot(gplot, naseq, nag, GPLOT_POINTS, "green");
gplotAddPlot(gplot, naseq, nab, GPLOT_POINTS, "blue");
gplotMakeOutput(gplot);
pixDestroy(&pix1);
pixDestroy(&pix2);
pixDestroy(&pixd);
numaDestroy(&naseq);
numaDestroy(&nar);
numaDestroy(&nag);
numaDestroy(&nab);
gplotDestroy(&gplot);
}
#endif
#if 1
/* Test the gray LI scaling function, comparing the
* special cases of scaling factor 2.0 and 4.0 with the
* general case */
if (d == 8 || d == 32)
{
PIX *pixt, *pix0, *pix1, *pix2, *pixd;
NUMA *nagray, *naseq;
GPLOT *gplot;
if (d == 8)
pixt = pixClone(pixs);
else
pixt = pixConvertRGBToGray(pixs, 0.33, 0.34, 0.33);
pix0 = pixScaleGrayLI(pixt, 0.5, 0.5);
#if 1
startTimer();
pix1 = pixScaleGrayLI(pix0, 2.00001, 2.0);
fprintf(stderr, " Time with regular LI 2x: %7.3f\n", stopTimer());
startTimer();
pix2 = pixScaleGrayLI(pix0, 2.0, 2.0);
fprintf(stderr, " Time with 2x LI: %7.3f\n", stopTimer());
#else
startTimer();
pix1 = pixScaleGrayLI(pix0, 4.00001, 4.0);
fprintf(stderr, " Time with regular LI 4x: %7.3f\n", stopTimer());
startTimer();
pix2 = pixScaleGrayLI(pix0, 4.0, 4.0);
fprintf(stderr, " Time with 2x LI: %7.3f\n", stopTimer());
#endif
pixWrite("/tmp/gray1", pix1, IFF_JFIF_JPEG);
pixWrite("/tmp/gray2", pix2, IFF_JFIF_JPEG);
pixd = pixAbsDifference(pix1, pix2);
nagray = pixGetGrayHistogram(pixd, 1);
naseq = numaMakeSequence(0., 1., 256);
gplot = gplotCreate("/tmp/g_absdiff", GPLOT_X11, "Number vs diff",
"diff", "number");
gplotSetScaling(gplot, GPLOT_LOG_SCALE_Y);
gplotAddPlot(gplot, naseq, nagray, GPLOT_POINTS, "gray");
gplotMakeOutput(gplot);
pixDestroy(&pixt);
pixDestroy(&pix0);
pixDestroy(&pix1);
pixDestroy(&pix2);
pixDestroy(&pixd);
numaDestroy(&naseq);
numaDestroy(&nagray);
gplotDestroy(&gplot);
}
#endif
pixDestroy(&pixs);
return 0;
}