1 files changed, 20 insertions, 0 deletions

diff --git a/SD-VBS/benchmarks/texture_synthesis/src/matlab/spyrNumBands.m b/SD-VBS/benchmarks/texture_synthesis/src/matlab/spyrNumBands.m
new file mode 100755
index 0000000..68aec3f
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+++ b/SD-VBS/benchmarks/texture_synthesis/src/matlab/spyrNumBands.m
@@ -0,0 +1,20 @@
+% [NBANDS] = spyrNumBands(INDICES)
+%
+% Compute number of orientation bands in a steerable pyramid with
+% given index matrix.  If the pyramid contains only the highpass and
+% lowpass bands (i.e., zero levels), returns 0.
+
+% Eero Simoncelli, 2/97.
+
+function [nbands] =  spyrNumBands(pind)
+
+if (size(pind,1) == 2)
+  nbands  = 0;
+else
+  % Count number of orientation bands:
+  b = 3;
+  while ((b <= size(pind,1)) & all( pind(b,:) == pind(2,:)) )
+    b = b+1;
+  end
+  nbands = b-2;
+end