1 /*====================================================================*
2 - Copyright (C) 2001 Leptonica. All rights reserved.
3 -
4 - Redistribution and use in source and binary forms, with or without
5 - modification, are permitted provided that the following conditions
6 - are met:
7 - 1. Redistributions of source code must retain the above copyright
8 - notice, this list of conditions and the following disclaimer.
9 - 2. Redistributions in binary form must reproduce the above
10 - copyright notice, this list of conditions and the following
11 - disclaimer in the documentation and/or other materials
12 - provided with the distribution.
13 -
14 - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
15 - ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16 - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
17 - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY
18 - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 - OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
23 - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
24 - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *====================================================================*/
26
27 /*
28 * recogtest5.c
29 *
30 * Test document image decoding (DID) approach to splitting characters
31 *
32 * This uses recogIdentifyMultiple() to first split the touching
33 * characters and then do the identification on the resulting
34 * single characters. Compare with recogtest4.c.
35 */
36
37 #include "string.h"
38 #include "allheaders.h"
39
40 static PIX *GetBigComponent(PIX *pixs);
41
42
main(int argc,char ** argv)43 l_int32 main(int argc,
44 char **argv)
45 {
46 char buf[256];
47 l_int32 i, n, item;
48 l_int32 example[6] = {17, 20, 21, 22, 23, 24}; /* for decoding */
49 BOXA *boxa;
50 PIX *pix1, *pix2, *pix3, *pixdb;
51 PIXA *pixa1, *pixa2, *pixa3;
52 L_RECOG *recog;
53
54 if (argc != 1) {
55 fprintf(stderr, " Syntax: recogtest5\n");
56 return 1;
57 }
58
59 setLeptDebugOK(1);
60 lept_mkdir("lept/recog");
61
62 /* Generate the recognizer */
63 pixa1 = pixaRead("recog/sets/train01.pa");
64 recog = recogCreateFromPixa(pixa1, 0, 0, 0, 128, 1); /* no scaling */
65 recogAverageSamples(&recog, 1);
66 recogWrite("/tmp/lept/recog/rec1.rec", recog);
67
68 /* Show the templates */
69 recogDebugAverages(&recog, 1);
70 recogShowMatchesInRange(recog, recog->pixa_tr, 0.0, 1.0, 1);
71
72 /* Get a set of problem images to decode */
73 pixa2 = pixaRead("recog/sets/test01.pa");
74
75 /* Decode a subset of them. It takes about 2 ms to decode a
76 * 4 digit number (Viterbi for splitting; identification against
77 * all templates; debug off. */
78 for (i = 0; i < 6; i++) {
79 /* if (i != 3) continue; */ /* remove this comment to do all 6 */
80 item = example[i];
81 pix1 = pixaGetPix(pixa2, item, L_CLONE);
82 pixDisplay(pix1, 100, 100);
83 pix2 = GetBigComponent(pix1);
84 recogIdentifyMultiple(recog, pix2, 0, 0, NULL, &pixa3, NULL, 1);
85 pix3 = pixaDisplayTiledInColumns(pixa3, 1, 1.0, 20, 2);
86 pixDisplay(pix3, 800, 100);
87 pixDestroy(&pix1);
88 pixDestroy(&pix2);
89 pixDestroy(&pix3);
90 pixaDestroy(&pixa3);
91 }
92
93 pixaDestroy(&pixa1);
94 pixaDestroy(&pixa2);
95 recogDestroy(&recog);
96 return 0;
97 }
98
99 static PIX *
GetBigComponent(PIX * pixs)100 GetBigComponent(PIX *pixs)
101 {
102 BOX *box;
103 PIX *pix1, *pixd;
104
105 pix1 = pixMorphSequence(pixs, "c40.7 + o20.15 + d25.1", 0);
106 pixClipToForeground(pix1, NULL, &box);
107 pixd = pixClipRectangle(pixs, box, NULL);
108 pixDestroy(&pix1);
109 boxDestroy(&box);
110 return pixd;
111 }
112
113
114