applied patch from #1712 (thanks to Vlad)

69f5d8c1 · Vadim Pisarevsky · 216ef24b · 69f5d8c1
Commit 69f5d8c1 authored Mar 26, 2012 by Vadim Pisarevsky
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surf.cpp modules/nonfree/src/surf.cpp +1 -1

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--- a/modules/nonfree/src/surf.cpp
+++ b/modules/nonfree/src/surf.cpp
@@ -418,7 +418,7 @@ struct SURFFindInvoker
        for( int i=range.begin(); i<range.end(); i++ )
        {
            int layer = (*middleIndices)[i];
-            int octave = i % nOctaveLayers;
+            int octave = i / nOctaveLayers;
            findMaximaInLayer( *sum, *mask_sum, *dets, *traces, *sizes, 
                               *keypoints, octave, layer, hessianThreshold,
                               (*sampleSteps)[layer] );