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/*====================================================================*
- Copyright (C) 2001 Leptonica. All rights reserved.
- This software is distributed in the hope that it will be
- useful, but with NO WARRANTY OF ANY KIND.
- No author or distributor accepts responsibility to anyone for the
- consequences of using this software, or for whether it serves any
- particular purpose or works at all, unless he or she says so in
- writing. Everyone is granted permission to copy, modify and
- redistribute this source code, for commercial or non-commercial
- purposes, with the following restrictions: (1) the origin of this
- source code must not be misrepresented; (2) modified versions must
- be plainly marked as such; and (3) this notice may not be removed
- or altered from any source or modified source distribution.
*====================================================================*/
/*
* gammatest.c
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "allheaders.h"
#define NPLOTS 5
#define MINVAL 30
#define MAXVAL 210
main(int argc,
char **argv)
{
char *filein, *fileout;
char bigbuf[512];
l_int32 iplot;
l_float32 gam;
l_float64 gamma[NPLOTS] = {.5, 1.0, 1.5, 2.0, 2.5};
GPLOT *gplot;
NUMA *na, *nax;
PIX *pixs, *pixd;
static char mainName[] = "gammatest";
if (argc != 4)
exit(ERROR_INT(" Syntax: gammatest filein gam fileout", mainName, 1));
filein = argv[1];
gam = atof(argv[2]);
fileout = argv[3];
if ((pixs = pixRead(filein)) == NULL)
exit(ERROR_INT("pixs not made", mainName, 1));
#if 1
startTimer();
pixGammaTRC(pixs, pixs, gam, MINVAL, MAXVAL);
fprintf(stderr, "Time for gamma: %7.3f sec\n", stopTimer());
pixWrite(fileout, pixs, IFF_JFIF_JPEG);
pixDestroy(&pixs);
#endif
#if 0
startTimer();
pixd = pixGammaTRC(NULL, pixs, gam, MINVAL, MAXVAL);
fprintf(stderr, "Time for gamma: %7.3f sec\n", stopTimer());
pixWrite(fileout, pixd, IFF_JFIF_JPEG);
pixDestroy(&pixs);
pixDestroy(&pixd);
#endif
na = numaGammaTRC(gam, MINVAL, MAXVAL);
gplotSimple1(na, GPLOT_X11, "junkroot", "gamma trc");
numaDestroy(&na);
#if 1 /* plot gamma TRC maps */
gplot = gplotCreate("junkmap", GPLOT_X11,
"Mapping function for gamma correction",
"value in", "value out");
nax = numaMakeSequence(0.0, 1.0, 256);
for (iplot = 0; iplot < NPLOTS; iplot++) {
na = numaGammaTRC(gamma[iplot], 30, 215);
sprintf(bigbuf, "gamma = %3.1f", gamma[iplot]);
gplotAddPlot(gplot, nax, na, GPLOT_LINES, bigbuf);
numaDestroy(&na);
}
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
numaDestroy(&nax);
#endif
exit(0);
}
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