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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.
*====================================================================*/
/*
* colorquant_reg.c
*
* Regression test for various color quantizers
*/
#include <stdio.h>
#include <stdlib.h>
#include "allheaders.h"
static const l_int32 SPACE = 30;
static const l_int32 MAX_WIDTH = 350;
static const char *image[4] = {"marge.jpg",
"test24.jpg",
"juditharismax.jpg",
"hardlight2_2.jpg"};
static l_int32 TestImage(const char *filename, l_int32 i);
static void PixSave32(PIXA *pixa, PIX *pixc);
main(int argc,
char **argv)
{
l_int32 i;
static char mainName[] = "colorquant_reg";
if (argc != 1)
exit(ERROR_INT(" Syntax: colorquant_reg", mainName, 1));
for (i = 0; i < 4; i++) {
/* if (i != 2) continue; */
TestImage(image[i], i);
}
return 0;
}
static l_int32
TestImage(const char *filename,
l_int32 i)
{
char buf[256];
l_int32 w, h, nerrors;
l_float32 factor;
PIX *pix, *pixs, *pixc, *pix32, *pixt, *pixd;
PIXA *pixa;
char *fileout;
PROCNAME("TestImage");
if ((pix = pixRead(filename)) == NULL)
return ERROR_INT("pix not made", procName, 1);
pixGetDimensions(pix, &w, &h, NULL);
if (w > MAX_WIDTH) {
factor = (l_float32)MAX_WIDTH / (l_float32)w;
pixs = pixScale(pix, factor, factor);
}
else
pixs = pixClone(pix);
pixDestroy(&pix);
pixa = pixaCreate(0);
/* Median cut quantizer (no dither; 5 sigbits) */
pixSaveTiled(pixs, pixa, 1, 1, SPACE, 32);
pixc = pixMedianCutQuantGeneral(pixs, 0, 0, 16, 5, 1);
PixSave32(pixa, pixc);
pixc = pixMedianCutQuantGeneral(pixs, 0, 0, 128, 5, 1);
PixSave32(pixa, pixc);
pixc = pixMedianCutQuantGeneral(pixs, 0, 0, 256, 5, 1);
PixSave32(pixa, pixc);
/* Median cut quantizer (with dither; 5 sigbits) */
pixSaveTiled(pixs, pixa, 1, 1, SPACE, 0);
pixc = pixMedianCutQuantGeneral(pixs, 1, 0, 16, 5, 1);
PixSave32(pixa, pixc);
pixc = pixMedianCutQuantGeneral(pixs, 1, 0, 128, 5, 1);
PixSave32(pixa, pixc);
pixc = pixMedianCutQuantGeneral(pixs, 1, 0, 256, 5, 1);
PixSave32(pixa, pixc);
/* Median cut quantizer (no dither; 6 sigbits) */
pixSaveTiled(pixs, pixa, 1, 1, SPACE, 32);
pixc = pixMedianCutQuantGeneral(pixs, 0, 0, 16, 6, 1);
PixSave32(pixa, pixc);
pixc = pixMedianCutQuantGeneral(pixs, 0, 0, 128, 6, 1);
PixSave32(pixa, pixc);
pixc = pixMedianCutQuantGeneral(pixs, 0, 0, 256, 6, 1);
PixSave32(pixa, pixc);
/* Median cut quantizer (with dither; 6 sigbits) */
pixSaveTiled(pixs, pixa, 1, 1, SPACE, 0);
pixc = pixMedianCutQuantGeneral(pixs, 1, 0, 16, 6, 1);
PixSave32(pixa, pixc);
pixc = pixMedianCutQuantGeneral(pixs, 1, 0, 128, 6, 1);
PixSave32(pixa, pixc);
pixc = pixMedianCutQuantGeneral(pixs, 1, 0, 256, 6, 10);
PixSave32(pixa, pixc);
/* Simple 1-pass octree quantizer */
pixSaveTiled(pixs, pixa, 1, 1, SPACE, 0);
pixc = pixColorQuant1Pass(pixs, 0); /* no dither */
PixSave32(pixa, pixc);
pixc = pixColorQuant1Pass(pixs, 1); /* dither */
PixSave32(pixa, pixc);
/* 2-pass octree quantizer */
pixSaveTiled(pixs, pixa, 1, 1, SPACE, 0);
pixc = pixOctreeColorQuant(pixs, 128, 0); /* no dither */
PixSave32(pixa, pixc);
pixc = pixOctreeColorQuant(pixs, 256, 0); /* no dither */
PixSave32(pixa, pixc);
pixc = pixOctreeColorQuant(pixs, 128, 1); /* dither */
PixSave32(pixa, pixc);
pixc = pixOctreeColorQuant(pixs, 256, 1); /* dither */
PixSave32(pixa, pixc);
/* Simple adaptive quantization to 4 or 8 bpp */
pixSaveTiled(pixs, pixa, 1, 1, SPACE, 0);
pixc = pixOctreeQuant(pixs, 8, 0); /* fixed: 8 colors */
PixSave32(pixa, pixc);
pixc = pixOctreeQuant(pixs, 16, 0); /* fixed: 16 colors */
PixSave32(pixa, pixc);
pixc = pixOctreeQuant(pixs, 64, 0); /* fixed: 64 colors */
PixSave32(pixa, pixc);
pixc = pixOctreeQuant(pixs, 256, 0); /* fixed: 256 colors */
PixSave32(pixa, pixc);
/* Quantize to fully populated octree (RGB) at given level */
pixSaveTiled(pixs, pixa, 1, 1, SPACE, 0);
pixc = pixFixedOctcubeQuantRGB(pixs, 2); /* level 2 */
PixSave32(pixa, pixc);
pixc = pixFixedOctcubeQuantRGB(pixs, 3); /* level 3 */
PixSave32(pixa, pixc);
pixc = pixFixedOctcubeQuantRGB(pixs, 4); /* level 4 */
PixSave32(pixa, pixc);
pixc = pixFixedOctcubeQuantRGB(pixs, 5); /* level 5 */
PixSave32(pixa, pixc);
/* Generate 32 bpp RGB image with num colors <= 256 */
pixt = pixOctreeQuant(pixs, 256, 0); /* cmapped version */
pix32 = pixRemoveColormap(pixt, REMOVE_CMAP_BASED_ON_SRC);
/* Quantize image with few colors at fixed octree leaf level */
pixSaveTiled(pixt, pixa, 1, 1, SPACE, 0);
pixc = pixFixedOctcubeQuantCmap(pix32, 2); /* level 2 */
PixSave32(pixa, pixc);
pixc = pixFixedOctcubeQuantCmap(pix32, 3); /* level 3 */
PixSave32(pixa, pixc);
pixc = pixFixedOctcubeQuantCmap(pix32, 4); /* level 4 */
PixSave32(pixa, pixc);
pixc = pixFixedOctcubeQuantCmap(pix32, 5); /* level 5 */
PixSave32(pixa, pixc);
/* Mixed color/gray octree quantizer */
pixSaveTiled(pixt, pixa, 1, 1, SPACE, 0);
pixc = pixOctcubeQuantMixed(pix32, 8, 64, 10); /* max delta = 10 */
PixSave32(pixa, pixc);
pixc = pixOctcubeQuantMixed(pix32, 8, 64, 30); /* max delta = 30 */
PixSave32(pixa, pixc);
pixc = pixOctcubeQuantMixed(pix32, 8, 64, 50); /* max delta = 50 */
PixSave32(pixa, pixc);
/* Run the high-level converter */
pixSaveTiled(pixt, pixa, 1, 1, SPACE, 0);
pixc = pixConvertRGBToColormap(pix32, 4, &nerrors); /* level 4 */
if (nerrors) fprintf(stderr, "Number errors at level 4: %d\n", nerrors);
PixSave32(pixa, pixc);
pixc = pixConvertRGBToColormap(pix32, 5, &nerrors); /* level 5 */
if (nerrors) fprintf(stderr, "Number errors at level 5: %d\n", nerrors);
PixSave32(pixa, pixc);
pixc = pixConvertRGBToColormap(pix32, 6, &nerrors); /* level 6 */
if (nerrors) fprintf(stderr, "Number errors at level 6: %d\n", nerrors);
PixSave32(pixa, pixc);
pixDestroy(&pix32);
pixDestroy(&pixt);
pixd = pixaDisplay(pixa, 0, 0);
pixDisplay(pixd, 100, 100);
sprintf(buf, "junkdisp.%d.jpg", i);
pixWrite(buf, pixd, IFF_JFIF_JPEG);
pixDestroy(&pixs);
pixDestroy(&pixd);
pixaDestroy(&pixa);
return 0;
}
static void
PixSave32(PIXA *pixa, PIX *pixc)
{
PIX *pix32;
pix32 = pixConvertTo32(pixc);
pixSaveTiled(pix32, pixa, 1, 0, SPACE, 0);
pixDestroy(&pixc);
pixDestroy(&pix32);
}
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