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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.
*====================================================================*/
/*
* kernel_reg.c
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "allheaders.h"
static const char *kdatastr = " 20.3 50 80 50 20 "
" 51.4 100 140 100 50 "
" 92.5 160 200 160 90 "
" 53.7 100 140 100 50 "
" 24.9 50 80 50 20 ";
main(int argc,
char **argv)
{
char *str;
l_int32 i, j;
l_float32 sum;
L_KERNEL *kel1, *kel2, *kel3;
PIX *pixs, *pixg, *pixd, *pixt;
PIXA *pixa;
SARRAY *sa;
static char mainName[] = "kernel_reg";
if (argc != 1)
exit(ERROR_INT(" Syntax: kernel_reg", mainName, 1));
pixa = pixaCreate(0);
/* Test creating from a string */
kel1 = kernelCreateFromString(5, 5, 2, 2, kdatastr);
pixd = kernelDisplayInPix(kel1, 41, 2);
pixSaveTiled(pixd, pixa, 1, 1, 20, 8);
pixDestroy(&pixd);
kernelDestroy(&kel1);
/* Test read/write for kernel */
kel1 = kernelCreateFromString(5, 5, 2, 2, kdatastr);
kernelWrite("junkkern1", kel1);
kel2 = kernelRead("junkkern1");
kernelWrite("junkkern2", kel2);
system("diff -s junkkern1 junkkern2");
kernelDestroy(&kel1);
kernelDestroy(&kel2);
/* Test creating from a file */
sa = sarrayCreate(0);
sarrayAddString(sa, "# small 3x3 kernel", L_COPY);
sarrayAddString(sa, "3 5", L_COPY);
sarrayAddString(sa, "1 2", L_COPY);
sarrayAddString(sa, "20.5 50 80 50 20", L_COPY);
sarrayAddString(sa, "82. 120 180 120 80", L_COPY);
sarrayAddString(sa, "22.1 50 80 50 20", L_COPY);
str = sarrayToString(sa, 1);
arrayWrite("junkkernfile", "w", str, strlen(str));
kel2 = kernelCreateFromFile("junkkernfile");
pixd = kernelDisplayInPix(kel2, 41, 2);
pixSaveTiled(pixd, pixa, 1, 1, 20, 0);
pixWrite("junkker1.bmp", pixd, IFF_BMP);
pixDestroy(&pixd);
sarrayDestroy(&sa);
FREE(str);
kernelDestroy(&kel2);
/* Test creating from a pix */
pixt = pixCreate(5, 3, 8);
pixSetPixel(pixt, 0, 0, 20);
pixSetPixel(pixt, 1, 0, 50);
pixSetPixel(pixt, 2, 0, 80);
pixSetPixel(pixt, 3, 0, 50);
pixSetPixel(pixt, 4, 0, 20);
pixSetPixel(pixt, 0, 1, 80);
pixSetPixel(pixt, 1, 1, 120);
pixSetPixel(pixt, 2, 1, 180);
pixSetPixel(pixt, 3, 1, 120);
pixSetPixel(pixt, 4, 1, 80);
pixSetPixel(pixt, 0, 0, 20);
pixSetPixel(pixt, 1, 2, 50);
pixSetPixel(pixt, 2, 2, 80);
pixSetPixel(pixt, 3, 2, 50);
pixSetPixel(pixt, 4, 2, 20);
kel3 = kernelCreateFromPix(pixt, 1, 2);
pixd = kernelDisplayInPix(kel3, 41, 2);
pixSaveTiled(pixd, pixa, 1, 0, 20, 0);
pixWrite("junkker2.bmp", pixd, IFF_BMP);
pixDestroy(&pixd);
pixDestroy(&pixt);
kernelDestroy(&kel3);
/* Test convolution with kel1 */
pixs = pixRead("test24.jpg");
pixg = pixScaleRGBToGrayFast(pixs, 3, COLOR_GREEN);
pixSaveTiled(pixg, pixa, 1, 1, 20, 0);
kel1 = kernelCreateFromString(5, 5, 2, 2, kdatastr);
pixd = pixConvolve(pixg, kel1, 8, 1);
pixSaveTiled(pixd, pixa, 1, 0, 20, 0);
pixWrite("junkker3.bmp", pixd, IFF_BMP);
pixDestroy(&pixs);
pixDestroy(&pixg);
pixDestroy(&pixd);
kernelDestroy(&kel1);
/* Test convolution with flat rectangular kel */
pixs = pixRead("test24.jpg");
pixg = pixScaleRGBToGrayFast(pixs, 3, COLOR_GREEN);
kel2 = kernelCreate(11, 11);
kernelSetOrigin(kel2, 5, 5);
for (i = 0; i < 11; i++) {
for (j = 0; j < 11; j++)
kernelSetElement(kel2, i, j, 1);
}
pixd = pixConvolve(pixg, kel2, 8, 1);
pixSaveTiled(pixd, pixa, 1, 1, 20, 0);
pixWrite("junkker4.bmp", pixd, IFF_BMP);
pixt = pixBlockconv(pixg, 5, 5);
pixSaveTiled(pixt, pixa, 1, 0, 20, 0);
pixWrite("junkker5.bmp", pixt, IFF_BMP);
pixCompareGray(pixd, pixt, L_COMPARE_ABS_DIFF, GPLOT_X11, NULL,
NULL, NULL, NULL);
pixDestroy(&pixs);
pixDestroy(&pixg);
pixDestroy(&pixd);
pixDestroy(&pixt);
kernelDestroy(&kel2);
/* Test generation and convolution with gaussian kernel */
pixs = pixRead("test8.jpg");
pixSaveTiled(pixs, pixa, 1, 1, 20, 0);
kel1 = makeGaussianKernel(5, 5, 3.0, 300);
kernelGetSum(kel1, &sum);
fprintf(stderr, "Sum for gaussian kernel = %f\n", sum);
kernelWrite("junkgauss.kel", kel1);
pixt = pixConvolve(pixs, kel1, 8, 1);
pixSaveTiled(pixt, pixa, 1, 0, 20, 0);
pixWrite("junkker6.bmp", pixt, IFF_BMP);
pixDestroy(&pixt);
pixt = kernelDisplayInPix(kel1, 25, 2);
pixSaveTiled(pixt, pixa, 1, 0, 20, 0);
pixDestroy(&pixt);
kernelDestroy(&kel1);
pixDestroy(&pixs);
/* Test generation and convolution with diff of gaussians kernel */
/* pixt = pixRead("marge.jpg");
pixs = pixConvertRGBToLuminance(pixt);
pixDestroy(&pixt); */
pixs = pixRead("test8.jpg");
pixSaveTiled(pixs, pixa, 1, 1, 20, 0);
kel1 = makeDoGKernel(7, 7, 1.5, 2.7);
kernelGetSum(kel1, &sum);
fprintf(stderr, "Sum for DoG kernel = %f\n", sum);
kernelWrite("junkdog.kel", kel1);
pixt = pixConvolve(pixs, kel1, 8, 0);
/* pixInvert(pixt, pixt); */
pixSaveTiled(pixt, pixa, 1, 0, 20, 0);
pixWrite("junkker7.bmp", pixt, IFF_BMP);
pixDestroy(&pixt);
pixt = kernelDisplayInPix(kel1, 20, 2);
pixSaveTiled(pixt, pixa, 1, 0, 20, 0);
pixDestroy(&pixt);
kernelDestroy(&kel1);
pixDestroy(&pixs);
pixd = pixaDisplay(pixa, 0, 0);
pixDisplay(pixd, 100, 100);
pixWrite("junkkernel.jpg", pixd, IFF_JFIF_JPEG);
pixDestroy(&pixd);
pixaDestroy(&pixa);
return 0;
}
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