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 * arithtest.c
29 *
30 * Test the pixacc functions, using an 8 bpp image and converting
31 * back and forth between 8 and 16 bpp.
32 */
33
34 #include "allheaders.h"
35
main(int argc,char ** argv)36 int main(int argc,
37 char **argv)
38 {
39 char *filein;
40 l_int32 w, h;
41 PIX *pixs, *pix1, *pix2, *pix3, *pix4, *pix5;
42 static char mainName[] = "arithtest";
43
44 if (argc != 2)
45 return ERROR_INT(" Syntax: arithtest filein", mainName, 1);
46 filein = argv[1];
47
48 setLeptDebugOK(1);
49 lept_mkdir("lept/arith");
50
51 if ((pixs = pixRead(filein)) == NULL)
52 return ERROR_INT("pix not made", mainName, 1);
53
54 /* Input a grayscale image and convert it to 16 bpp */
55 pixGetDimensions(pixs, &w, &h, NULL);
56 pix1 = pixInitAccumulate(w, h, 0);
57 pixAccumulate(pix1, pixs, L_ARITH_ADD);
58 pixMultConstAccumulate(pix1, 255., 0);
59 pix2 = pixFinalAccumulate(pix1, 0, 16);
60 l_pngSetReadStrip16To8(0);
61 pixWrite("/tmp/lept/arith/pix1.png", pix2, IFF_PNG);
62
63 /* Convert it back to 8 bpp, linear mapped */
64 pix3 = pixMaxDynamicRange(pix2, L_LINEAR_SCALE);
65 pixWrite("/tmp/lept/arith/pix2.png", pix3, IFF_PNG);
66
67 /* Convert it back to 8 bpp using the MSB */
68 pix4 = pixRead("/tmp/pix1.png");
69 pix5 = pixConvert16To8(pix4, 1);
70 pixWrite("/tmp/lept/arith/pix3.png", pix5, IFF_PNG);
71
72 pixDestroy(&pixs);
73 pixDestroy(&pix1);
74 pixDestroy(&pix2);
75 pixDestroy(&pix3);
76 pixDestroy(&pix4);
77 pixDestroy(&pix5);
78 return 0;
79 }
80
