third-party/leptonica/prog/livre_tophat.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.
*====================================================================*/
/*
* livre_tophat.c
*
*/
#include "allheaders.h"
int main(int argc,
char **argv)
{
PIX *pixs, *pixsg, *pixg, *pixd;
PIXA *pixa;
static char mainName[] = "livre_tophat";
if (argc != 1)
return ERROR_INT(" Syntax: livre_tophat", mainName, 1);
/* Read the image in at 150 ppi. */
if ((pixs = pixRead("brothers.150.jpg")) == NULL)
return ERROR_INT("pix not made", mainName, 1);
pixDisplayWrite(NULL, -1);
pixDisplayWriteFormat(pixs, 2, IFF_JFIF_JPEG);
pixsg = pixConvertRGBToLuminance(pixs);
/* Black tophat (closing - original-image) and invert */
pixg = pixTophat(pixsg, 15, 15, L_TOPHAT_BLACK);
pixInvert(pixg, pixg);
pixDisplayWriteFormat(pixg, 2, IFF_JFIF_JPEG);
/* Set black point at 200, white point at 245. */
pixd = pixGammaTRC(NULL, pixg, 1.0, 200, 245);
pixDisplayWriteFormat(pixd, 2, IFF_JFIF_JPEG);
pixDestroy(&pixg);
pixDestroy(&pixd);
/* Generate the output image */
pixa = pixaReadFiles("/tmp/display", "file");
pixd = pixaDisplayTiledAndScaled(pixa, 8, 350, 3, 0, 25, 2);
pixWrite("/tmp/tophat.jpg", pixd, IFF_JFIF_JPEG);
pixDisplay(pixd, 0, 0);
pixDestroy(&pixd);
pixDestroy(&pixs);
pixDestroy(&pixsg);
return 0;
}