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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.
*====================================================================*/
/*
* cornertest.c
*
* e.g., use on witten.tif
*/
#include <stdio.h>
#include <stdlib.h>
#include "allheaders.h"
#define LINE_SIZE 9
main(int argc,
char **argv)
{
char *filein, *fileout;
l_int32 x, y, n, i;
PIX *pixs;
PTA *pta;
PTAA *ptaa, *ptaa2, *ptaa3;
static char mainName[] = "cornertest";
if (argc != 3)
exit(ERROR_INT(" Syntax: cornertest filein fileout", mainName, 1));
filein = argv[1];
fileout = argv[2];
if ((pixs = pixRead(filein)) == NULL)
exit(ERROR_INT("pixs not made", mainName, 1));
/* Clean noise in LR corner of witten.tif */
pixSetPixel(pixs, 2252, 3051, 0);
pixSetPixel(pixs, 2252, 3050, 0);
pixSetPixel(pixs, 2251, 3050, 0);
pta = pixFindCornerPixels(pixs);
ptaWriteStream(stderr, pta, 1);
/* Test pta and ptaa I/O */
#if 1
ptaa = ptaaCreate(3);
ptaaAddPta(ptaa, pta, L_COPY);
ptaaAddPta(ptaa, pta, L_COPY);
ptaaAddPta(ptaa, pta, L_COPY);
ptaaWriteStream(stderr, ptaa, 1);
ptaaWrite("junkptaa", ptaa, 1);
ptaa2 = ptaaRead("junkptaa");
ptaaWrite("junkptaa2", ptaa2, 1);
ptaaWrite("junkptaa3", ptaa, 0);
ptaa3 = ptaaRead("junkptaa3");
ptaaWrite("junkptaa4", ptaa3, 0);
ptaaDestroy(&ptaa);
ptaaDestroy(&ptaa2);
ptaaDestroy(&ptaa3);
#endif
/* mark corner pixels */
n = ptaGetCount(pta);
for (i = 0; i < n; i++) {
ptaGetIPt(pta, i, &x, &y);
pixRenderLine(pixs, x - LINE_SIZE, y, x + LINE_SIZE, y, 3,
L_FLIP_PIXELS);
pixRenderLine(pixs, x, y - LINE_SIZE, x, y + LINE_SIZE, 3,
L_FLIP_PIXELS);
}
pixWrite(fileout, pixs, IFF_PNG);
pixDestroy(&pixs);
ptaDestroy(&pta);
ptaDestroy(&pta);
exit(0);
}
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