Revision: 56433
http://sourceforge.net/p/brlcad/code/56433
Author: mohitdaga
Date: 2013-08-01 19:07:28 +0000 (Thu, 01 Aug 2013)
Log Message:
-----------
Add icv_saturate function. This changes the saturation of image pixels.
Modified Paths:
--------------
brlcad/trunk/include/icv.h
brlcad/trunk/src/libicv/operations.c
Modified: brlcad/trunk/include/icv.h
===================================================================
--- brlcad/trunk/include/icv.h 2013-08-01 18:57:28 UTC (rev 56432)
+++ brlcad/trunk/include/icv.h 2013-08-01 19:07:28 UTC (rev 56433)
@@ -428,7 +428,18 @@
*/
icv_image_t *icv_divides(icv_image_t *img1, icv_image_t *img2);
+/**
+ * Change the saturation of image pixels. If sat is
+ * set to 0.0 the result will be monochromatic, if sat is made
+ * 1.0, the color will not change, if sat is made greater than 1.0,
+ * the amount of color is increased.
+ *
+ * @param img RGB Image to be saturated.
+ * @param sat Saturation value.
+ */
+int icv_saturate(icv_image_t* img, double sat);
+
typedef enum {
ICV_FILTER_LOW_PASS,
ICV_FILTER_LAPLACIAN,
Modified: brlcad/trunk/src/libicv/operations.c
===================================================================
--- brlcad/trunk/src/libicv/operations.c 2013-08-01 18:57:28 UTC (rev
56432)
+++ brlcad/trunk/src/libicv/operations.c 2013-08-01 19:07:28 UTC (rev
56433)
@@ -225,6 +225,45 @@
return out_img;
}
+int icv_saturate(icv_image_t* img, double sat)
+{
+ double *data;
+ double bw; /* monochrome intensity */
+ double rwgt, gwgt, bwgt;
+ double rt, gt, bt;
+ long size;
+
+ if (img == NULL) {
+ bu_log("icv_saturate : Trying to Saturate a Null img");
+ return -1;
+ }
+
+ if (img->color_space != ICV_COLOR_SPACE_RGB) {
+ bu_log("icv_saturate : Saturates only RGB Images");
+ return -1;
+ }
+ fprintf(stderr, "saturation value is %lf\n", sat);
+ data = img->data;
+ size = img->width*img->height;
+ rwgt = 0.31*(1.0-sat);
+ gwgt = 0.61*(1.0-sat);
+ bwgt = 0.08*(1.0-sat);
+ while(size-- > 0) {
+ rt = *data;
+ gt = *(data+1);
+ bt = *(data+2);
+ bw = (rwgt*rt + gwgt*gt + bwgt*bt);
+ rt = bw + sat*rt;
+ gt = bw + sat*gt;
+ bt = bw + sat*bt;
+ *data++ = rt;
+ *data++ = gt;
+ *data++ = bt;
+ }
+ icv_sanitize(img);
+ return 0;
+}
+
/*
* Local Variables:
* tab-width: 8
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