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/benchmarks/texture_synthesis/src/matlab/var2.m | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100755 SD-VBS/benchmarks/texture_synthesis/src/matlab/var2.m

(limited to 'SD-VBS/benchmarks/texture_synthesis/src/matlab/var2.m')

diff --git a/SD-VBS/benchmarks/texture_synthesis/src/matlab/var2.m b/SD-VBS/benchmarks/texture_synthesis/src/matlab/var2.m
new file mode 100755
index 0000000..6957eff
--- /dev/null
+++ b/SD-VBS/benchmarks/texture_synthesis/src/matlab/var2.m
@@ -0,0 +1,17 @@
+% V = VAR2(MTX,MEAN)
+%
+% Sample variance of a matrix.
+%  Passing MEAN (optional) makes the calculation faster.
+
+function res = var2(mtx, mn)
+
+if (exist('mn') ~= 1)
+  mn =  mean2(mtx);
+end
+
+if (isreal(mtx))
+  res = sum(sum(abs(mtx-mn).^2)) / max((prod(size(mtx)) - 1),1);
+else
+  res = sum(sum(real(mtx-mn).^2)) + i*sum(sum(imag(mtx-mn).^2));
+  res = res  / max((prod(size(mtx)) - 1),1);
+end
-- 
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