third-party/leptonica/prog/locminmax_reg.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.
*====================================================================*/
/*
* locminmax_reg.c
*
* Note: you can remove all minima that are touching the border, using:
* pix3 = pixRemoveBorderConnComps(pix1, 8);
* pixPaintThroughMask(pixd, pix3, 0, 0, redval);
*/
#include <math.h>
#include "allheaders.h"
int main(int argc,
char **argv)
{
l_int32 i, j;
l_float32 f;
l_uint32 redval, greenval;
PIX *pixs, *pixd, *pix0, *pix1, *pix2;
static char mainName[] = "locminmax_reg";
if (argc != 1)
return ERROR_INT("syntax: locminmax_reg", mainName, 1);
pixs = pixCreate(500, 500, 8);
for (i = 0; i < 500; i++) {
for (j = 0; j < 500; j++) {
f = 128.0 + 26.3 * sin(0.0438 * (l_float32)i);
f += 33.4 * cos(0.0712 * (l_float32)i);
f += 18.6 * sin(0.0561 * (l_float32)j);
f += 23.6 * cos(0.0327 * (l_float32)j);
pixSetPixel(pixs, j, i, (l_int32)f);
}
}
pixDisplay(pixs, 0, 0);
pixWrite("/tmp/junkpattern.png", pixs, IFF_PNG);
startTimer();
/* pixSelectedLocalExtrema(pixs, 1, &pix1, &pix2); */
pixLocalExtrema(pixs, 0, 0, &pix1, &pix2);
fprintf(stderr, "Time for extrema: %7.3f\n", stopTimer());
composeRGBPixel(255, 0, 0, &redval);
composeRGBPixel(0, 255, 0, &greenval);
pixd = pixConvertTo32(pixs);
pixPaintThroughMask(pixd, pix2, 0, 0, greenval);
pixPaintThroughMask(pixd, pix1, 0, 0, redval);
pixDisplay(pixd, 510, 0);
pixWrite("/tmp/junkpixd.png", pixd, IFF_PNG);
pixDestroy(&pix1);
pixDestroy(&pix2);
pixDestroy(&pixs);
pixDestroy(&pixd);
pix0 = pixRead("karen8.jpg");
pixs = pixBlockconv(pix0, 10, 10);
pixDisplay(pixs, 0, 400);
pixWrite("/tmp/junkconv.png", pixs, IFF_PNG);
startTimer();
/* pixSelectedLocalExtrema(pixs, 1, &pix1, &pix2); */
pixLocalExtrema(pixs, 50, 100, &pix1, &pix2);
fprintf(stderr, "Time for extrema: %7.3f\n", stopTimer());
composeRGBPixel(255, 0, 0, &redval);
composeRGBPixel(0, 255, 0, &greenval);
pixd = pixConvertTo32(pixs);
pixPaintThroughMask(pixd, pix2, 0, 0, greenval);
pixPaintThroughMask(pixd, pix1, 0, 0, redval);
pixDisplay(pixd, 350, 400);
pixWrite("/tmp/junkpixd2.png", pixd, IFF_PNG);
pixDestroy(&pix0);
pixDestroy(&pix1);
pixDestroy(&pix2);
pixDestroy(&pixs);
pixDestroy(&pixd);
return 0;
}