int main(int argc,
char **argv)
{
char textstr[256];
l_int32 w, h, d, i;
l_uint32 srcval, dstval;
l_float32 scalefact, sat, fract;
L_BMF *bmf8;
L_KERNEL *kel;
NUMA *na;
PIX *pix, *pixs, *pixs1, *pixs2, *pixd;
PIX *pixt0, *pixt1, *pixt2, *pixt3, *pixt4;
PIXA *pixa, *pixaf;
L_REGPARAMS *rp;
if (regTestSetup(argc, argv, &rp))
return 1;
pix = pixRead(filein);
pixGetDimensions(pix, &w, &h, &d);
if (d != 32)
return ERROR_INT("file not 32 bpp", argv[0], 1);
scalefact = (l_float32)WIDTH / (l_float32)w;
pixs = pixScale(pix, scalefact, scalefact);
w = pixGetWidth(pixs);
pixaf = pixaCreate(5);
/* TRC: vary gamma */
pixa = pixaCreate(20);
for (i = 0; i < 20; i++) {
pixt0 = pixGammaTRC(NULL, pixs, 0.3 + 0.15 * i, 0, 255);
pixaAddPix(pixa, pixt0, L_INSERT);
}
pixt1 = pixaDisplayTiledAndScaled(pixa, 32, w, 5, 0, 10, 2);
pixSaveTiled(pixt1, pixaf, 1.0, 1, 20, 32);
regTestWritePixAndCheck(rp, pixt1, IFF_PNG); /* 0 */
pixDisplayWithTitle(pixt1, 0, 100, "TRC Gamma", rp->display);
pixDestroy(&pixt1);
pixaDestroy(&pixa);
/* TRC: vary black point */
pixa = pixaCreate(20);
for (i = 0; i < 20; i++) {
pixt0 = pixGammaTRC(NULL, pixs, 1.0, 5 * i, 255);
pixaAddPix(pixa, pixt0, L_INSERT);
}
pixt1 = pixaDisplayTiledAndScaled(pixa, 32, w, 5, 0, 10, 2);
pixSaveTiled(pixt1, pixaf, 1.0, 1, 20, 0);
regTestWritePixAndCheck(rp, pixt1, IFF_PNG); /* 1 */
pixDisplayWithTitle(pixt1, 300, 100, "TRC", rp->display);
pixDestroy(&pixt1);
pixaDestroy(&pixa);
/* Vary hue */
pixa = pixaCreate(20);
for (i = 0; i < 20; i++) {
pixt0 = pixModifyHue(NULL, pixs, 0.01 + 0.05 * i);
pixaAddPix(pixa, pixt0, L_INSERT);
}
pixt1 = pixaDisplayTiledAndScaled(pixa, 32, w, 5, 0, 10, 2);
pixSaveTiled(pixt1, pixaf, 1.0, 1, 20, 0);
regTestWritePixAndCheck(rp, pixt1, IFF_PNG); /* 2 */
pixDisplayWithTitle(pixt1, 600, 100, "Hue", rp->display);
pixDestroy(&pixt1);
pixaDestroy(&pixa);
/* Vary saturation */
pixa = pixaCreate(20);
na = numaCreate(20);
for (i = 0; i < 20; i++) {
pixt0 = pixModifySaturation(NULL, pixs, -0.9 + 0.1 * i);
pixMeasureSaturation(pixt0, 1, &sat);
pixaAddPix(pixa, pixt0, L_INSERT);
numaAddNumber(na, sat);
}
pixt1 = pixaDisplayTiledAndScaled(pixa, 32, w, 5, 0, 10, 2);
pixSaveTiled(pixt1, pixaf, 1.0, 1, 20, 0);
gplotSimple1(na, GPLOT_PNG, "/tmp/regout/enhance.7", "Average Saturation");
regTestWritePixAndCheck(rp, pixt1, IFF_PNG); /* 3 */
pixDisplayWithTitle(pixt1, 900, 100, "Saturation", rp->display);
numaDestroy(&na);
pixDestroy(&pixt1);
pixaDestroy(&pixa);
/* Vary contrast */
pixa = pixaCreate(20);
for (i = 0; i < 20; i++) {
pixt0 = pixContrastTRC(NULL, pixs, 0.1 * i);
pixaAddPix(pixa, pixt0, L_INSERT);
}
pixt1 = pixaDisplayTiledAndScaled(pixa, 32, w, 5, 0, 10, 2);
pixSaveTiled(pixt1, pixaf, 1.0, 1, 20, 0);
regTestWritePixAndCheck(rp, pixt1, IFF_PNG); /* 4 */
pixDisplayWithTitle(pixt1, 0, 400, "Contrast", rp->display);
pixDestroy(&pixt1);
pixaDestroy(&pixa);
/* Vary sharpening */
pixa = pixaCreate(20);
for (i = 0; i < 20; i++) {
pixt0 = pixUnsharpMasking(pixs, 3, 0.01 + 0.15 * i);
pixaAddPix(pixa, pixt0, L_INSERT);
}
pixt1 = pixaDisplayTiledAndScaled(pixa, 32, w, 5, 0, 10, 2);
pixSaveTiled(pixt1, pixaf, 1.0, 1, 20, 0);
regTestWritePixAndCheck(rp, pixt1, IFF_PNG); /* 5 */
pixDisplayWithTitle(pixt1, 300, 400, "Sharp", rp->display);
pixDestroy(&pixt1);
pixaDestroy(&pixa);
/* Hue constant mapping to lighter background */
pixa = pixaCreate(11);
bmf8 = bmfCreate("fonts", 8);
pixt0 = pixRead("candelabrum-11.jpg");
composeRGBPixel(230, 185, 144, &srcval); /* select typical bg pixel */
for (i = 0; i <= 10; i++) {
fract = 0.10 * i;
pixelFractionalShift(230, 185, 144, fract, &dstval);
pixt1 = pixLinearMapToTargetColor(NULL, pixt0, srcval, dstval);
snprintf(textstr, 50, "Fract = %5.1f", fract);
pixt2 = pixAddSingleTextblock(pixt1, bmf8, textstr, 0xff000000,
L_ADD_BELOW, NULL);
pixSaveTiledOutline(pixt2, pixa, 1.0, (i % 4 == 0) ? 1 : 0, 30, 2, 32);
pixDestroy(&pixt1);
pixDestroy(&pixt2);
}
pixDestroy(&pixt0);
pixd = pixaDisplay(pixa, 0, 0);
regTestWritePixAndCheck(rp, pixd, IFF_JFIF_JPEG); /* 6 */
pixDisplayWithTitle(pixd, 600, 400, "Constant hue", rp->display);
bmfDestroy(&bmf8);
pixaDestroy(&pixa);
pixDestroy(&pixd);
/* Delayed testing of saturation plot */
regTestCheckFile(rp, "/tmp/regout/enhance.7.png"); /* 7 */
/* Display results */
pixd = pixaDisplay(pixaf, 0, 0);
regTestWritePixAndCheck(rp, pixd, IFF_JFIF_JPEG); /* 8 */
pixDisplayWithTitle(pixd, 100, 100, "All", rp->display);
pixDestroy(&pixd);
pixaDestroy(&pixaf);
pixDestroy(&pix);
pixDestroy(&pixs);
/* -----------------------------------------------*
* Test global color transforms *
* -----------------------------------------------*/
/* Make identical cmap and rgb images */
pix = pixRead("wet-day.jpg");
pixs1 = pixOctreeColorQuant(pix, 200, 0);
pixs2 = pixRemoveColormap(pixs1, REMOVE_CMAP_TO_FULL_COLOR);
regTestComparePix(rp, pixs1, pixs2); /* 9 */
/* Make a diagonal color transform matrix */
kel = kernelCreate(3, 3);
kernelSetElement(kel, 0, 0, 0.7);
kernelSetElement(kel, 1, 1, 0.4);
kernelSetElement(kel, 2, 2, 1.3);
/* Apply to both cmap and rgb images. */
pixt1 = pixMultMatrixColor(pixs1, kel);
pixt2 = pixMultMatrixColor(pixs2, kel);
regTestComparePix(rp, pixt1, pixt2); /* 10 */
kernelDestroy(&kel);
/* Apply the same transform in the simpler interface */
pixt3 = pixMultConstantColor(pixs1, 0.7, 0.4, 1.3);
pixt4 = pixMultConstantColor(pixs2, 0.7, 0.4, 1.3);
regTestComparePix(rp, pixt3, pixt4); /* 11 */
regTestComparePix(rp, pixt1, pixt3); /* 12 */
regTestWritePixAndCheck(rp, pixt1, IFF_JFIF_JPEG); /* 13 */
pixDestroy(&pix);
pixDestroy(&pixs1);
pixDestroy(&pixs2);
pixDestroy(&pixt1);
pixDestroy(&pixt2);
pixDestroy(&pixt3);
pixDestroy(&pixt4);
return regTestCleanup(rp);
}
int main(int argc,
char **argv)
{
char *filein, *fileout;
l_int32 i, j, w, d, nhue, nsat, tilewidth;
l_float32 scale, dhue, dsat, delhue, delsat;
PIX *pixs, *pixt1, *pixt2, *pixd;
PIXA *pixa;
static char mainName[] = "modifyhuesat";
if (argc != 7)
return ERROR_INT(
" Syntax: modifyhuesat filein nhue dhue nsat dsat fileout",
mainName, 1);
filein = argv[1];
nhue = atoi(argv[2]);
dhue = atof(argv[3]);
nsat = atoi(argv[4]);
dsat = atof(argv[5]);
fileout = argv[6];
if (nhue % 2 == 0) {
nhue++;
fprintf(stderr, "nhue must be odd; raised to %d\n", nhue);
}
if (nsat % 2 == 0) {
nsat++;
fprintf(stderr, "nsat must be odd; raised to %d\n", nsat);
}
if ((pixt1 = pixRead(filein)) == NULL)
return ERROR_INT("pixt1 not read", mainName, 1);
pixGetDimensions(pixt1, &w, NULL, NULL);
scale = 250.0 / (l_float32)w;
pixt2 = pixScale(pixt1, scale, scale);
pixs = pixConvertTo32(pixt2);
pixDestroy(&pixt1);
pixDestroy(&pixt2);
pixGetDimensions(pixs, &w, NULL, &d);
pixa = pixaCreate(nhue * nsat);
for (i = 0; i < nsat; i++) {
delsat = (i - nsat / 2) * dsat;
pixt1 = pixModifySaturation(NULL, pixs, delsat);
for (j = 0; j < nhue; j++) {
delhue = (j - nhue / 2) * dhue;
pixt2 = pixModifyHue(NULL, pixt1, delhue);
pixaAddPix(pixa, pixt2, L_INSERT);
}
pixDestroy(&pixt1);
}
tilewidth = L_MIN(w, 1500 / nsat);
pixd = pixaDisplayTiledAndScaled(pixa, d, tilewidth, nsat, 0, 25, 3);
pixWrite(fileout, pixd, IFF_JFIF_JPEG);
pixDestroy(&pixs);
pixDestroy(&pixd);
pixaDestroy(&pixa);
return 0;
}
