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/*====================================================================*
- Copyright (C) 2001 Leptonica. All rights reserved.
- This software is distributed in the hope that it will be
- useful, but with NO WARRANTY OF ANY KIND.
- No author or distributor accepts responsibility to anyone for the
- consequences of using this software, or for whether it serves any
- particular purpose or works at all, unless he or she says so in
- writing. Everyone is granted permission to copy, modify and
- redistribute this source code, for commercial or non-commercial
- purposes, with the following restrictions: (1) the origin of this
- source code must not be misrepresented; (2) modified versions must
- be plainly marked as such; and (3) this notice may not be removed
- or altered from any source or modified source distribution.
*====================================================================*/
/*
* colorspacetest.c
*
*/
#include <stdio.h>
#include <stdlib.h>
#include "allheaders.h"
main(int argc,
char **argv)
{
char label[512];
l_int32 w, h, i, j, rwhite, gwhite, bwhite, count;
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;
PIXCMAP *cmap;
static char mainName[] = "colorspacetest";
if (argc != 2)
exit(ERROR_INT(" Syntax: colorspacetest filein", mainName, 1));
if ((pixs = pixRead(argv[1])) == NULL)
exit(ERROR_INT("pixs not made", mainName, 1));
/* 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 = pixOctreeQuant(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("junkplot1", GPLOT_X11,
"Fraction with given color (diff from average)",
"white point space for red", "amount of color");
gplot2 = gplotCreate("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("junkcolormag", pixt1, IFF_PNG);
pixDisplayWithTitle(pixt1, 0, 100, "Color magnitude", 1);
pixDestroy(&pixt1);
pixaDestroy(&pixa);
numaDestroy(&naseq);
numaaDestroy(&naa1);
numaaDestroy(&naa2);
system("gthumb junk_write_display* &");
pixDestroy(&pixs);
return 0;
}
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