Color Color::dark() const
{
float r, g, b, a, h, s, v;
getRGBA(r, g, b, a);
convertRGBToHSV(r, g, b, h, s, v);
v = max(0.0f, min(v - 0.33f, 1.0f));
convertHSVToRGB(h, s, v, r, g, b);
return Color((int)(r * 255), (int)(g * 255), (int)(b * 255), (int)(a * 255));
}
/*!
* pixcmapConvertHSVToRGB()
*
* Input: colormap
* Return: 0 if OK; 1 on error
*
* Notes:
* - in-place transform
* - See convertRGBToHSV() for def'n of HSV space.
* - replaces: h --> r, s --> g, v --> b
*/
l_int32
pixcmapConvertHSVToRGB(PIXCMAP *cmap)
{
l_int32 i, ncolors, rval, gval, bval, hval, sval, vval;
PROCNAME("pixcmapConvertHSVToRGB");
if (!cmap)
return ERROR_INT("cmap not defined", procName, 1);
ncolors = pixcmapGetCount(cmap);
for (i = 0; i < ncolors; i++) {
pixcmapGetColor(cmap, i, &hval, &sval, &vval);
convertHSVToRGB(hval, sval, vval, &rval, &gval, &bval);
pixcmapResetColor(cmap, i, rval, gval, bval);
}
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;
}
void ColorMap::calcColorSHSV(float *d, size_t i)
{
float t = (float)i/(float)m_numBuckets;
convertHSVToRGB(360.0*t, 1.0, 1.0, d[0], d[1], d[2]);
}
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);
}