Revision: 56501
http://sourceforge.net/p/brlcad/code/56501
Author: mohitdaga
Date: 2013-08-03 14:39:07 +0000 (Sat, 03 Aug 2013)
Log Message:
-----------
Adding nintrep : nearest neighbour method to interpolate an image.
Modified Paths:
--------------
brlcad/trunk/src/libicv/decimate.c
Modified: brlcad/trunk/src/libicv/decimate.c
===================================================================
--- brlcad/trunk/src/libicv/decimate.c 2013-08-03 13:03:08 UTC (rev 56500)
+++ brlcad/trunk/src/libicv/decimate.c 2013-08-03 14:39:07 UTC (rev 56501)
@@ -89,6 +89,47 @@
return;
}
+HIDDEN void nintrep(icv_image_t* bif, int out_width, int out_height)
+{
+ double xstep, ystep;
+ int i,j;
+ int x,y;
+ int widthstep;
+ double *in_r, *in_c; /*<< Pointer to row and col of input buffers*/
+ double *out_data, *out_p;
+ xstep = (double) (bif->width-1) / (double) (out_width) - 1.0e-06;
+ ystep = (double) (bif->height-1) / (double) (out_height) - 1.0e-06;
+
+ out_p = out_data = bu_malloc(out_width*out_height*sizeof(double), "intrep
: out_data");
+
+ widthstep= bif->width*bif->channels;
+
+ for (j=0; j<out_height; j++) {
+ y = (int) (j*ystep);
+
+ in_r = bif->data + y*widthstep;
+
+ for (i = 0; i < out_width; i++) {
+ x = (int) (i*xstep);
+
+ in_c = in_r + x*bif->channels;
+
+ VMOVEN(out_p, in_c, bif->channels);
+ out_p += bif->channels;
+ }
+ }
+
+ bu_free(bif->data, "intrep : in_data");
+
+ bif->data = out_data;
+
+ bif->width = out_width;
+ bif->height = out_height;
+
+ return;
+
+}
+
/*
* Local Variables:
* tab-width: 8
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