From f618466c25d43f3bae9e40920273bf77de1e1149 Mon Sep 17 00:00:00 2001
From: leochanj105 <leochanj@live.unc.edu>
Date: Mon, 19 Oct 2020 23:09:30 -0400
Subject: initial sd-vbs

initial sd-vbs

add sd-vbs

sd-vbs
---
 SD-VBS/common/c/fiConv2.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 SD-VBS/common/c/fiConv2.c

(limited to 'SD-VBS/common/c/fiConv2.c')

diff --git a/SD-VBS/common/c/fiConv2.c b/SD-VBS/common/c/fiConv2.c
new file mode 100644
index 0000000..87fc4ec
--- /dev/null
+++ b/SD-VBS/common/c/fiConv2.c
@@ -0,0 +1,54 @@
+/********************************
+Author: Sravanthi Kota Venkata
+********************************/
+
+#include "sdvbs_common.h"
+
+F2D* fiConv2(I2D* a, F2D* b)
+{
+    F2D *c;
+    F2D *out;
+    int ma, na, mb, nb, ci, cj, i, j, m, n;
+    int r_index, c_index;
+
+    ma = a->height;
+    na = a->width;
+
+    mb = b->height;
+    nb = b->width;
+    
+    r_index = ceil((mb + 1.0)/2.0);
+    c_index = ceil((nb + 1.0)/2.0);
+
+    ci = ma+mb-1;
+    cj = na+nb-1;
+
+    c = fSetArray(ci, cj, 0);
+
+    for(i=0; i<ci; i++)
+    {
+        for(j=0; j<cj; j++)
+        {
+            for(m=0; m<ma; m++)
+            {
+                for(n=0; n<na; n++)
+                {
+                    if( (i-m)>=0 && (j-n)>=0 && (i-m)<mb && (j-n)<nb )
+                        subsref(c,i,j) += subsref(a,m,n) * subsref(b,(i-m),(j-n));
+                }
+            }
+
+        }
+    }
+
+    out = fMallocHandle(ma, na);
+    for(i=0; i<ma; i++)
+    {
+        for(j=0; j<na; j++)
+        {
+            subsref(out,i,j) = subsref(c,(i+r_index-1),(j+c_index-1));
+        }
+    }
+
+    return out;
+}
-- 
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