initial sd-vbs

initial sd-vbs

add sd-vbs

sd-vbs

1 files changed, 19 insertions, 0 deletions

diff --git a/SD-VBS/benchmarks/texture_synthesis/src/matlab/modulateFlip.m b/SD-VBS/benchmarks/texture_synthesis/src/matlab/modulateFlip.m
new file mode 100755
index 0000000..eb27303
--- /dev/null
+++ b/SD-VBS/benchmarks/texture_synthesis/src/matlab/modulateFlip.m
@@ -0,0 +1,19 @@
+% [HFILT] = modulateFlipShift(LFILT)
+%
+% QMF/Wavelet highpass filter construction: modulate by (-1)^n,
+% reverse order (and shift by one, which is handled by the convolution
+% routines).  This is an extension of the original definition of QMF's
+% (e.g., see Simoncelli90).
+
+% Eero Simoncelli, 7/96.
+
+function [hfilt] = modulateFlipShift(lfilt)
+
+lfilt = lfilt(:);
+
+sz = size(lfilt,1);
+sz2 = ceil(sz/2);
+
+ind = [sz:-1:1]';
+
+hfilt = lfilt(ind) .* (-1).^(ind-sz2);