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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.
*====================================================================*/
/*
* edgetest.c
*/
#include <stdio.h>
#include <stdlib.h>
#include "allheaders.h"
main(int argc,
char **argv)
{
l_int32 i, w, h, d;
l_float32 time;
PIX *pixs, *pixf, *pixd;
PIXA *pixa;
char *filein, *fileout;
static char mainName[] = "edgetest";
if (argc != 3)
exit(ERROR_INT(" Syntax: edgetest filein fileout", mainName, 1));
filein = argv[1];
fileout = argv[2];
if ((pixs = pixRead(filein)) == NULL)
exit(ERROR_INT("pix not made", mainName, 1));
pixGetDimensions(pixs, &w, &h, &d);
if (d != 8)
exit(ERROR_INT("pix not 8 bpp", mainName, 1));
/* Speed: about 12 Mpix/GHz/sec */
startTimer();
pixf = pixSobelEdgeFilter(pixs, L_HORIZONTAL_EDGES);
pixd = pixThresholdToBinary(pixf, 60);
pixInvert(pixd, pixd);
time = stopTimer();
fprintf(stderr, "Time = %7.3f sec\n", time);
fprintf(stderr, "MPix/sec: %7.3f\n", 0.000001 * w * h / time);
pixDisplay(pixs, 0, 0);
pixInvert(pixf, pixf);
pixDisplay(pixf, 480, 0);
pixDisplay(pixd, 960, 0);
pixWrite(fileout, pixf, IFF_PNG);
pixDestroy(&pixd);
/* Threshold at different values */
pixInvert(pixf, pixf);
for (i = 10; i <= 120; i += 10) {
pixd = pixThresholdToBinary(pixf, i);
pixInvert(pixd, pixd);
pixDisplayWrite(pixd, 1);
pixDestroy(&pixd);
}
pixDestroy(&pixf);
/* Display tiled */
pixa = pixaReadFiles(".", "junk_write_display");
pixd = pixaDisplayTiledAndScaled(pixa, 8, 400, 3, 0, 25, 2);
pixWrite("junktiles", pixd, IFF_JFIF_JPEG);
pixDestroy(&pixd);
pixaDestroy(&pixa);
pixDestroy(&pixs);
exit(0);
}
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