1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/*====================================================================*
- 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.
*====================================================================*/
/*
* graymazetest.c
*
* Finds the least-cost path using a breadth-first algorithm
* between two points on a grayscale image.
*/
#include <stdio.h>
#include <stdlib.h>
#include "allheaders.h"
#define NPATHS 6
static const l_int32 xinit[NPATHS] = {42, 73, 73, 42, 324, 471};
static const l_int32 yinit[NPATHS] = {117, 319, 319, 117, 170, 201};
static const l_int32 xend[NPATHS] = {419, 419, 233, 326, 418, 128};
static const l_int32 yend[NPATHS] = {383, 383, 112, 168, 371, 341};
static const l_int32 XINIT = 42;
static const l_int32 YINIT = 117;
static const l_int32 XEND = 419;
static const l_int32 YEND = 383;
main(int argc,
char **argv)
{
char *mazein, *pathout;
l_int32 i, w, h;
PIX *pixex, *pix, *pixs, *pixd;
PTA *pta;
PTAA *ptaa;
static char mainName[] = "graymazetest";
if (argc != 3)
exit(ERROR_INT(" Syntax: graymazetest mazein pathout", mainName, 1));
mazein = argv[1];
pathout = argv[2];
if ((pix = pixRead(mazein)) == NULL)
exit(ERROR_INT("pixs not read", mainName, 1));
if (pixGetDepth(pix) != 8)
pixs = pixConvertTo8(pix, FALSE);
else
pixs = pixClone(pix);
pixGetDimensions(pixs, &w, &h, NULL);
#if 1 /* multiple paths */
ptaa = ptaaCreate(NPATHS);
for (i = 0; i < NPATHS; i++) {
if (xinit[i] >= w || xend[i] >= w || yinit[i] >= h || yend[i] >= h) {
fprintf(stderr, "path %d extends beyond image; skipping\n", i);
continue;
}
pta = searchGrayMaze(pixs, xinit[i], yinit[i], xend[i], yend[i],
NULL);
ptaaAddPta(ptaa, pta, L_INSERT);
}
pixd = pixDisplayPtaa(pixs, ptaa);
pixex = pixScaleBySampling(pixd, 4., 4.);
pixDisplay(pixex, 450, 50);
pixWrite(pathout, pixd, IFF_PNG);
ptaaDestroy(&ptaa);
#else /* one path */
pta = searchGrayMaze(pixs, XINIT, YINIT, XEND, YEND, &pixd);
pixd = pixDisplayPta(pixs, pta);
pixex = pixScaleBySampling(pixd, 4., 4.);
pixDisplay(pixex, 450, 50);
pixWrite(pathout, pixd, IFF_PNG);
ptaDestroy(&pta);
#endif
pixDestroy(&pixs);
pixDestroy(&pixd);
pixDestroy(&pixex);
exit(0);
}
|
