third-party/leptonica/prog/edgetest.c
/*====================================================================*
- Copyright (C) 2001 Leptonica. All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- 2. Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following
- disclaimer in the documentation and/or other materials
- provided with the distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*====================================================================*/
/*
* edgetest.c
*/
#include "allheaders.h"
int 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)
return ERROR_INT(" Syntax: edgetest filein fileout", mainName, 1);
filein = argv[1];
fileout = argv[2];
if ((pixs = pixRead(filein)) == NULL)
return ERROR_INT("pix not made", mainName, 1);
pixGetDimensions(pixs, &w, &h, &d);
if (d != 8)
return 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("/tmp/display", "file");
pixd = pixaDisplayTiledAndScaled(pixa, 8, 400, 3, 0, 25, 2);
pixWrite("/tmp/junktiles.jpg", pixd, IFF_JFIF_JPEG);
pixDestroy(&pixd);
pixaDestroy(&pixa);
pixDestroy(&pixs);
return 0;
}