diff options
Diffstat (limited to 'leptonica/prog/gammatest.c')
| -rw-r--r-- | leptonica/prog/gammatest.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/leptonica/prog/gammatest.c b/leptonica/prog/gammatest.c new file mode 100644 index 00000000..7c8e2ec6 --- /dev/null +++ b/leptonica/prog/gammatest.c @@ -0,0 +1,98 @@ +/*====================================================================* + - 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. + *====================================================================*/ + +/* + * gammatest.c + */ + +#ifdef HAVE_CONFIG_H +#include <config_auto.h> +#endif /* HAVE_CONFIG_H */ + +#include <math.h> +#include "allheaders.h" + +#define MINVAL 30 +#define MAXVAL 210 + +int main(int argc, + char **argv) +{ +char *filein, *fileout; +char buf[512]; +l_int32 iplot, same; +l_float32 gam; +l_float64 gamma[] = {.5, 1.0, 1.5, 2.0, 2.5, -1.0}; +GPLOT *gplot; +NUMA *na, *nax; +PIX *pixs, *pixd; +static char mainName[] = "gammatest"; + + if (argc != 4) + return ERROR_INT(" Syntax: gammatest filein gam fileout", mainName, 1); + filein = argv[1]; + gam = atof(argv[2]); + fileout = argv[3]; + + setLeptDebugOK(1); + lept_mkdir("lept/gamma"); + + if ((pixs = pixRead(filein)) == NULL) + return ERROR_INT("pixs not made", mainName, 1); + + startTimer(); + pixd = pixGammaTRC(NULL, pixs, gam, MINVAL, MAXVAL); + lept_stderr("Time for gamma: %7.3f sec\n", stopTimer()); + pixGammaTRC(pixs, pixs, gam, MINVAL, MAXVAL); + pixEqual(pixs, pixd, &same); + if (!same) + lept_stderr("Error in pixGammaTRC!\n"); + pixWrite(fileout, pixs, IFF_JFIF_JPEG); + pixDestroy(&pixs); + + na = numaGammaTRC(gam, MINVAL, MAXVAL); + gplotSimple1(na, GPLOT_PNG, "/tmp/lept/gamma/trc", "gamma trc"); + l_fileDisplay("/tmp/lept/gamma/trc.png", 100, 100, 1.0); + numaDestroy(&na); + + /* Plot gamma TRC maps */ + gplot = gplotCreate("/tmp/lept/gamma/corr", GPLOT_PNG, + "Mapping function for gamma correction", + "value in", "value out"); + nax = numaMakeSequence(0.0, 1.0, 256); + for (iplot = 0; gamma[iplot] >= 0.0; iplot++) { + na = numaGammaTRC(gamma[iplot], 30, 215); + snprintf(buf, sizeof(buf), "gamma = %3.1f", gamma[iplot]); + gplotAddPlot(gplot, nax, na, GPLOT_LINES, buf); + numaDestroy(&na); + } + gplotMakeOutput(gplot); + gplotDestroy(&gplot); + l_fileDisplay("/tmp/lept/gamma/corr.png", 100, 100, 1.0); + numaDestroy(&nax); + return 0; +} + |