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Diffstat (limited to 'leptonica/prog/histotest.c')
| -rw-r--r-- | leptonica/prog/histotest.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/leptonica/prog/histotest.c b/leptonica/prog/histotest.c new file mode 100644 index 00000000..72b56327 --- /dev/null +++ b/leptonica/prog/histotest.c @@ -0,0 +1,102 @@ +/*====================================================================* + - 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. + *====================================================================*/ + +/* + * histotest.c + * + * Makes histograms of grayscale and color pixels + * from a pix. For RGB color, this uses + * rgb --> octcube indexing. + * + * histotest filein sigbits + * + * where the number of octcubes is 8^(sigbits) + * + * For gray, sigbits is ignored. + */ + +#ifdef HAVE_CONFIG_H +#include <config_auto.h> +#endif /* HAVE_CONFIG_H */ + +#include "allheaders.h" + +int main(int argc, + char **argv) +{ +char *filein; +l_int32 d, sigbits; +GPLOT *gplot; +NUMA *na; +PIX *pixs; +static char mainName[] = "histotest"; + + if (argc != 3) + return ERROR_INT(" Syntax: histotest filein sigbits", mainName, 1); + filein = argv[1]; + sigbits = atoi(argv[2]); + + setLeptDebugOK(1); + lept_mkdir("lept/histo"); + + if ((pixs = pixRead(filein)) == NULL) + return ERROR_INT("pixs not made", mainName, 1); + d = pixGetDepth(pixs); + if (d != 8 && d != 32) + return ERROR_INT("depth not 8 or 32 bpp", mainName, 1); + + if (d == 32) { + startTimer(); + if ((na = pixOctcubeHistogram(pixs, sigbits, NULL)) == NULL) + return ERROR_INT("na not made", mainName, 1); + lept_stderr("histo time = %7.3f sec\n", stopTimer()); + gplot = gplotCreate("/tmp/lept/histo/color", GPLOT_PNG, + "color histogram with octcube indexing", + "octcube index", "number of pixels in cube"); + gplotAddPlot(gplot, NULL, na, GPLOT_LINES, "input pix"); + gplotMakeOutput(gplot); + gplotDestroy(&gplot); + l_fileDisplay("/tmp/lept/histo/color.png", 100, 100, 1.0); + } + else { + if ((na = pixGetGrayHistogram(pixs, 1)) == NULL) + return ERROR_INT("na not made", mainName, 1); + numaWrite("/tmp/junkna", na); + gplot = gplotCreate("/tmp/lept/histo/gray", GPLOT_PNG, + "grayscale histogram", "gray value", + "number of pixels"); + gplotSetScaling(gplot, GPLOT_LOG_SCALE_Y); + gplotAddPlot(gplot, NULL, na, GPLOT_LINES, "input pix"); + gplotMakeOutput(gplot); + gplotDestroy(&gplot); + l_fileDisplay("/tmp/lept/histo/gray.png", 100, 100, 1.0); + } + + pixDestroy(&pixs); + numaDestroy(&na); + return 0; +} + |