third-party/leptonica/prog/arithtest.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.
*====================================================================*/
/*
* arithtest.c
*
*/
#include "allheaders.h"
int main(int argc,
char **argv)
{
char *filein;
l_int32 w, h;
PIX *pixs, *pix1, *pix2, *pix3, *pix4, *pix5;
static char mainName[] = "arithtest";
if (argc != 2)
return ERROR_INT(" Syntax: arithtest filein", mainName, 1);
filein = argv[1];
if ((pixs = pixRead(filein)) == NULL)
return ERROR_INT("pix not made", mainName, 1);
/* Input a grayscale image and convert it to 16 bpp */
pixGetDimensions(pixs, &w, &h, NULL);
pix1 = pixInitAccumulate(w, h, 0);
pixAccumulate(pix1, pixs, L_ARITH_ADD);
pixMultConstAccumulate(pix1, 255., 0);
pix2 = pixFinalAccumulate(pix1, 0, 16);
l_pngSetReadStrip16To8(0);
pixWrite("/tmp/pix1.png", pix2, IFF_PNG);
/* Convert it back to 8 bpp, linear mapped */
pix3 = pixMaxDynamicRange(pix2, L_LINEAR_SCALE);
pixWrite("/tmp/pix2.png", pix3, IFF_PNG);
/* Convert it back to 8 bpp using the MSB */
pix4 = pixRead("/tmp/pix1.png");
pix5 = pixConvert16To8(pix4, 1);
pixWrite("/tmp/pix3.png", pix5, IFF_PNG);
pixDestroy(&pixs);
pixDestroy(&pix1);
pixDestroy(&pix2);
pixDestroy(&pix3);
pixDestroy(&pix4);
pixDestroy(&pix5);
return 0;
}