l_int32 main(int argc,
char **argv)
{
l_uint32 *colors;
l_int32 ncolors;
PIX *pix1, *pix2, *pix3;
L_REGPARAMS *rp;
if (regTestSetup(argc, argv, &rp))
return 1;
/* Find the most populated colors */
pix1 = pixRead("fish24.jpg");
pixGetMostPopulatedColors(pix1, 2, 3, 10, &colors, NULL);
pix2 = pixDisplayColorArray(colors, 10, 190, 5, 1);
pixDisplayWithTitle(pix2, 0, 0, NULL, rp->display);
regTestWritePixAndCheck(rp, pix2, IFF_PNG); /* 0 */
lept_free(colors);
pixDestroy(&pix2);
/* Do a simple color quantization with sigbits = 2 */
pix2 = pixSimpleColorQuantize(pix1, 2, 3, 10);
pixDisplayWithTitle(pix2, 0, 400, NULL, rp->display);
regTestWritePixAndCheck(rp, pix2, IFF_PNG); /* 1 */
pix3 = pixRemoveColormap(pix2, REMOVE_CMAP_TO_FULL_COLOR);
regTestComparePix(rp, pix2, pix3); /* 2 */
pixNumColors(pix3, 1, &ncolors);
regTestCompareValues(rp, ncolors, 10, 0.0); /* 3 */
pixDestroy(&pix1);
pixDestroy(&pix2);
pixDestroy(&pix3);
/* Do a simple color quantization with sigbits = 3 */
pix1 = pixRead("wyom.jpg");
pixNumColors(pix1, 1, &ncolors); /* >255, so should give 0 */
regTestCompareValues(rp, ncolors, 0, 0.0); /* 4 */
pix2 = pixSimpleColorQuantize(pix1, 3, 3, 20);
pixDisplayWithTitle(pix2, 1000, 0, NULL, rp->display);
regTestWritePixAndCheck(rp, pix2, IFF_PNG); /* 5 */
ncolors = pixcmapGetCount(pixGetColormap(pix2));
regTestCompareValues(rp, ncolors, 20, 0.0); /* 6 */
pixDestroy(&pix1);
pixDestroy(&pix2);
/* Find the number of perceptually significant gray intensities */
pix1 = pixRead("marge.jpg");
pix2 = pixConvertTo8(pix1, 0);
pixNumSignificantGrayColors(pix2, 20, 236, 0.0001, 1, &ncolors);
regTestCompareValues(rp, ncolors, 219, 0.0); /* 7 */
pixDestroy(&pix1);
pixDestroy(&pix2);
return regTestCleanup(rp);
}
main(int argc,
char **argv)
{
char fname[256];
l_int32 i, w, h, nbins, factor, success, display;
l_int32 spike;
l_uint32 *array, *marray;
FILE *fp;
NUMA *na, *nan, *nai, *narbin;
PIX *pixs, *pixt, *pixd;
PIXA *pixa;
if (regTestSetup(argc, argv, &fp, &display, &success, NULL))
return 1;
/* Find the rank bin colors */
pixs = pixRead("map1.jpg");
pixGetDimensions(pixs, &w, &h, NULL);
factor = L_MAX(1, (l_int32)sqrt((l_float64)(w * h / 20000.0)));
nbins = 10;
pixGetRankColorArray(pixs, nbins, L_SELECT_MIN, factor, &array, 2);
for (i = 0; i < nbins; i++)
fprintf(stderr, "%d: %x\n", i, array[i]);
pixd = pixDisplayColorArray(array, nbins, 200, 5, 1);
pixWrite("/tmp/rankhisto.0.png", pixd, IFF_PNG);
regTestCheckFile(fp, argv, "/tmp/rankhisto.0.png", 0, &success);
pixDisplayWithTitle(pixd, 100, 100, NULL, display);
pixDestroy(&pixd);
/* Modify the rank bin colors by mapping them such
* that the lightest color is mapped to white */
marray = (l_uint32 *)CALLOC(nbins, sizeof(l_uint32));
for (i = 0; i < nbins; i++)
pixelLinearMapToTargetColor(array[i], array[nbins - 1],
0xffffff00, &marray[i]);
pixd = pixDisplayColorArray(marray, nbins, 200, 5, 1);
pixWrite("/tmp/rankhisto.1.png", pixd, IFF_PNG);
regTestCheckFile(fp, argv, "/tmp/rankhisto.1.png", 1, &success);
pixDisplayWithTitle(pixd, 100, 600, NULL, display);
pixDestroy(&pixd);
FREE(marray);
/* Save the histogram plots */
#ifndef _WIN32
sleep(2); /* give gnuplot time to write out the files */
#else
Sleep(2000);
#endif /* _WIN32 */
pixa = PixSavePlots1();
pixd = pixaDisplay(pixa, 0, 0);
pixWrite("/tmp/rankhisto.2.png", pixd, IFF_PNG);
regTestCheckFile(fp, argv, "/tmp/rankhisto.2.png", 2, &success);
pixDisplayWithTitle(pixd, 100, 600, NULL, display);
pixaDestroy(&pixa);
pixDestroy(&pixd);
/* Map to the lightest bin; then do TRC adjustment */
pixt = pixLinearMapToTargetColor(NULL, pixs, array[nbins - 1], 0xffffff00);
pixd = pixGammaTRC(NULL, pixt, 1.0, 0, 240);
pixWrite("/tmp/rankhisto.3.png", pixd, IFF_PNG);
regTestCheckFile(fp, argv, "/tmp/rankhisto.3.png", 3, &success);
pixDisplayWithTitle(pixd, 600, 100, NULL, display);
pixDestroy(&pixt);
pixDestroy(&pixd);
/* Now test the edge cases for the histogram and rank LUT,
* where all the histo data is piled up at one place.
* We only require that the result be sensible. */
for (i = 0; i < 3; i++) {
if (i == 0)
spike = 0;
else if (i == 1)
spike = 50;
else
spike = 99;
na = numaMakeConstant(0, 100);
numaReplaceNumber(na, spike, 200.0);
nan = numaNormalizeHistogram(na, 1.0);
numaDiscretizeRankAndIntensity(nan, 10, &narbin, &nai, NULL, NULL);
snprintf(fname, sizeof(fname), "/tmp/rtnan%d", i + 1);
gplotSimple1(nan, GPLOT_PNG, fname, "Normalized Histogram");
snprintf(fname, sizeof(fname), "/tmp/rtnai%d", i + 1);
gplotSimple1(nai, GPLOT_PNG, fname, "Intensity vs. rank bin");
snprintf(fname, sizeof(fname), "/tmp/rtnarbin%d", i + 1);
gplotSimple1(narbin, GPLOT_PNG, fname, "LUT: rank bin vs. Intensity");
numaDestroy(&na);
numaDestroy(&nan);
numaDestroy(&narbin);
numaDestroy(&nai);
}
#ifndef _WIN32
sleep(2); /* give gnuplot time to write out the files */
#else
Sleep(2000);
#endif /* _WIN32 */
pixa = PixSavePlots2();
pixd = pixaDisplay(pixa, 0, 0);
pixWrite("/tmp/rankhisto.4.png", pixd, IFF_PNG);
regTestCheckFile(fp, argv, "/tmp/rankhisto.4.png", 4, &success);
pixDisplayWithTitle(pixd, 500, 600, NULL, display);
pixaDestroy(&pixa);
pixDestroy(&pixd);
pixDestroy(&pixs);
FREE(array);
regTestCleanup(argc, argv, fp, success, NULL);
return 0;
}
