Revision: 56439
http://sourceforge.net/p/brlcad/code/56439
Author: mohitdaga
Date: 2013-08-01 20:07:10 +0000 (Thu, 01 Aug 2013)
Log Message:
-----------
Add stat.c This will contain statistics and histogram routines. Also adding
icv_hist function
Modified Paths:
--------------
brlcad/trunk/include/icv.h
brlcad/trunk/src/libicv/CMakeLists.txt
Added Paths:
-----------
brlcad/trunk/src/libicv/stat.c
Modified: brlcad/trunk/include/icv.h
===================================================================
--- brlcad/trunk/include/icv.h 2013-08-01 19:56:27 UTC (rev 56438)
+++ brlcad/trunk/include/icv.h 2013-08-01 20:07:10 UTC (rev 56439)
@@ -492,7 +492,15 @@
*/
ICV_EXPORT extern int icv_fade(icv_image_t *img, double fraction);
+/** @file libicv/stat.c
+ *
+ * This file contains image statistics and histogram routines.
+ *
+ */
+ICV_EXPORT size_t **icv_hist(icv_image_t* img, int n_bins);
+
+
/** @} */
/* end image utilities */
Modified: brlcad/trunk/src/libicv/CMakeLists.txt
===================================================================
--- brlcad/trunk/src/libicv/CMakeLists.txt 2013-08-01 19:56:27 UTC (rev
56438)
+++ brlcad/trunk/src/libicv/CMakeLists.txt 2013-08-01 20:07:10 UTC (rev
56439)
@@ -15,6 +15,7 @@
filter.c
encoding.c
operations.c
+ stat.c
pix.c
bw.c
)
Added: brlcad/trunk/src/libicv/stat.c
===================================================================
--- brlcad/trunk/src/libicv/stat.c (rev 0)
+++ brlcad/trunk/src/libicv/stat.c 2013-08-01 20:07:10 UTC (rev 56439)
@@ -0,0 +1,135 @@
+/* S T A T . C
+ * BRL-CAD
+ *
+ * Copyright (c) 2013 United States Government as represented by
+ * the U.S. Army Research Laboratory.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * version 2.1 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this file; see the file named COPYING for more
+ * information.
+ */
+/** @file libicv/stat.c
+ *
+ * This file contains image statistics and histogram routines.
+ *
+ */
+
+#include "bu.h"
+#include "icv.h"
+
+HIDDEN size_t **
+icv_init_bins(icv_image_t* img, int n_bins)
+{
+ int c;
+ int i;
+ size_t **bins;
+ bins = (size_t**) bu_malloc(sizeof(size_t*)*img->channels, "icv_init_bins
: Histogram Bins");
+ for (c = 0; c <= img->channels; c++) {
+ bins[c] = (size_t*) bu_malloc(sizeof(size_t)*n_bins, "icv_init_bins :
Histogram Array for Channels");
+ for(i=0; i<n_bins; i++) {
+ bins[c][i] = 0;
+ }
+ }
+ return bins;
+}
+
+size_t **
+icv_hist(icv_image_t* img, int n_bins)
+{
+ long int i;
+ int j;
+ double *data;
+ int temp;
+ long int size;
+ size_t **bins;
+ size = img->width*img->height;
+ data = img->data;
+
+ bins = icv_init_bins(img, n_bins);
+
+ for(i=0; i<=size; i++) {
+ for(j=0; j < img->channels; j++) {
+ temp = (*data++)*n_bins;
+ bins[j][temp]++;
+ }
+ }
+ return bins;
+}
+
+double *icv_image_max(icv_image_t* img)
+{
+ double *data = NULL;
+ size_t size;
+ double *max; /**< An array of size channels. */
+ int i;
+
+ max = bu_malloc(sizeof(double)*img->channels, "max values");
+
+ for(i=0; i<img->channels; i++)
+ max[i] = 0.0;
+
+ data = img->data;
+
+ for (size = img->width*img->height; size>0; size--)
+ for (i=0; i<img->channels; i++)
+ if (max[i] > *data++)
+ max[i] = *(data-1);
+
+ return max;
+}
+
+double *icv_image_sum(icv_image_t* img)
+{
+ double *data = NULL;
+
+ double *sum; /**< An array of size channels. */
+ int i;
+ size_t size,j;
+ sum = bu_malloc(sizeof(double)*img->channels, "sum values");
+
+ for(i=0; i<img->channels; i++)
+ sum[i] = 0.0;
+
+ data = img->data;
+ size = (size_t)img->width*img->height;
+
+ for (j=0; j<size; j++)
+ for (i=0; i<img->channels; i++)
+ sum[i] += *data++;
+
+ return sum;
+}
+
+double *icv_image_mean(icv_image_t* img)
+{
+ double *mean;
+ size_t size;
+ int i;
+
+ mean = icv_image_sum(img); /**< recieves sum from icv_image_sum*/
+ size = (size_t)img->width*img->height;
+
+ for(i=0; i<img->channels; i++)
+ mean[i]/=size;
+
+ return mean;
+}
+
+/*
+ * Local Variables:
+ * tab-width: 8
+ * mode: C
+ * indent-tabs-mode: t
+ * c-file-style: "stroustrup"
+ * End:
+ * ex: shiftwidth=4 tabstop=8
+ */
Property changes on: brlcad/trunk/src/libicv/stat.c
___________________________________________________________________
Added: svn:mime-type
## -0,0 +1 ##
+text/plain
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Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
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