1 files changed, 15 insertions, 0 deletions

diff --git a/SD-VBS/benchmarks/texture_synthesis/src/matlabPyrTools/ifftshift.m b/SD-VBS/benchmarks/texture_synthesis/src/matlabPyrTools/ifftshift.m
new file mode 100755
index 0000000..2ade297
--- /dev/null
+++ b/SD-VBS/benchmarks/texture_synthesis/src/matlabPyrTools/ifftshift.m
@@ -0,0 +1,15 @@
+% [RES] = ifftshift (MTX)
+%
+% Inverse of MatLab's FFTSHIFT.  That is,
+%     ifftshift(fftshift(MTX)) = MTX
+%   for any size MTX.
+
+% Eero Simoncelli, 2/97.
+
+function [res]  = ifftshift(mtx)
+
+sz = size(mtx);
+DC = ceil((sz+1)./2);                   % location of DC term in a matlab fft.
+
+res = [mtx(DC(1):sz(1), DC(2):sz(2)) , mtx(DC(1):sz(1), 1:DC(2)-1); ...
+       mtx(1:DC(1)-1, DC(2):sz(2)) , mtx(1:DC(1)-1, 1:DC(2)-1)];