third-party/leptonica/prog/rank_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.
*====================================================================*/
/*
* rank_reg.c
*
* Tests grayscale rank functions:
* (1) pixRankFilterGray()
* (2) pixScaleGrayMinMax()
* (3) pixScaleGrayRankCascade()
*/
#include "allheaders.h"
static const l_int32 SIZE = 20;
int main(int argc,
char **argv)
{
l_int32 i, j, w, h, same;
l_float32 t, t1, t2;
GPLOT *gplot;
NUMA *nax, *nay1, *nay2;
PIX *pixs, *pixd, *pixt1, *pixt2, *pixt3, *pixt4;
PIXA *pixa;
static char mainName[] = "rank_reg";
if (argc != 1)
return ERROR_INT(" Syntax: rank_reg", mainName, 1);
if ((pixs = pixRead("lucasta.150.jpg")) == NULL)
return ERROR_INT("pixs not made", mainName, 1);
pixGetDimensions(pixs, &w, &h, NULL);
startTimer();
pixd = pixRankFilterGray(pixs, 15, 15, 0.4);
t = stopTimer();
fprintf(stderr, "Time = %7.3f sec\n", t);
fprintf(stderr, "MPix/sec: %7.3f\n", 0.000001 * w * h / t);
pixDisplay(pixs, 0, 200);
pixDisplay(pixd, 600, 200);
pixWrite("/tmp/filter.png", pixd, IFF_PNG);
pixDestroy(&pixd);
/* Get results for dilation */
startTimer();
pixt1 = pixDilateGray(pixs, 15, 15);
t = stopTimer();
fprintf(stderr, "Dilation time = %7.3f sec\n", t);
/* Get results for erosion */
pixt2 = pixErodeGray(pixs, 15, 15);
/* Get results using the rank filter for rank = 0.0 and 1.0.
* Don't use 0.0 or 1.0, because those are dispatched
* automatically to erosion and dilation! */
pixt3 = pixRankFilterGray(pixs, 15, 15, 0.0001);
pixt4 = pixRankFilterGray(pixs, 15, 15, 0.9999);
/* Compare */
pixEqual(pixt1, pixt4, &same);
if (same)
fprintf(stderr, "Correct: dilation results same as rank 1.0\n");
else
fprintf(stderr, "Error: dilation results differ from rank 1.0\n");
pixEqual(pixt2, pixt3, &same);
if (same)
fprintf(stderr, "Correct: erosion results same as rank 0.0\n");
else
fprintf(stderr, "Error: erosion results differ from rank 0.0\n");
pixDestroy(&pixt1);
pixDestroy(&pixt2);
pixDestroy(&pixt3);
pixDestroy(&pixt4);
fprintf(stderr, "\n----------------------------------------\n");
fprintf(stderr, "The next part takes about 30 seconds\n");
fprintf(stderr, "----------------------------------------\n\n");
nax = numaMakeSequence(1, 1, SIZE);
nay1 = numaCreate(SIZE);
nay2 = numaCreate(SIZE);
gplot = gplotCreate("/tmp/rankroot", GPLOT_X11, "sec/MPix vs filter size",
"size", "time");
for (i = 1; i <= SIZE; i++) {
t1 = t2 = 0.0;
for (j = 0; j < 5; j++) {
startTimer();
pixt1 = pixRankFilterGray(pixs, i, SIZE + 1, 0.5);
t1 += stopTimer();
pixDestroy(&pixt1);
startTimer();
pixt1 = pixRankFilterGray(pixs, SIZE + 1, i, 0.5);
t2 += stopTimer();
if (j == 0)
pixDisplayWrite(pixt1, 1);
pixDestroy(&pixt1);
}
numaAddNumber(nay1, 1000000. * t1 / (5. * w * h));
numaAddNumber(nay2, 1000000. * t2 / (5. * w * h));
}
gplotAddPlot(gplot, nax, nay1, GPLOT_LINES, "vertical");
gplotAddPlot(gplot, nax, nay2, GPLOT_LINES, "horizontal");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
/* Display tiled */
pixa = pixaReadFiles("/tmp/display", "file");
pixd = pixaDisplayTiledAndScaled(pixa, 8, 250, 5, 0, 25, 2);
pixWrite("/tmp/tiles.jpg", pixd, IFF_JFIF_JPEG);
pixDestroy(&pixd);
pixaDestroy(&pixa);
pixDestroy(&pixs);
pixDisplayWrite(NULL, -1); /* clear out */
pixs = pixRead("test8.jpg");
for (i = 1; i <= 4; i++) {
pixt1 = pixScaleGrayRank2(pixs, i);
pixDisplay(pixt1, 300 * (i - 1), 100);
pixDestroy(&pixt1);
}
pixDestroy(&pixs);
pixs = pixRead("test24.jpg");
pixt1 = pixConvertRGBToLuminance(pixs);
pixt2 = pixScale(pixt1, 1.5, 1.5);
for (i = 1; i <= 4; i++) {
for (j = 1; j <= 4; j++) {
pixt3 = pixScaleGrayRankCascade(pixt2, i, j, 0, 0);
pixDisplayWrite(pixt3, 1);
pixDestroy(&pixt3);
}
}
pixDestroy(&pixt1);
pixDestroy(&pixt2);
pixDestroy(&pixs);
pixDisplayMultiple("/tmp/display/file*");
return 0;
}