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Applied fix suggested in bug 3282 and shortened code

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This commit is contained in:
StevenPuttemans 2013-09-24 09:01:20 +02:00
parent d08b163657
commit f6c802b563
1 changed files with 2 additions and 0 deletions
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modules/nonfree/src/sift.cpp
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@ -543,6 +543,8 @@ static void calcSIFTDescriptor( const Mat& img, Point2f ptf, float ori, float sc
float exp_scale = -1.f/(d * d * 0.5f);
float hist_width = SIFT_DESCR_SCL_FCTR * scl;
int radius = cvRound(hist_width * 1.4142135623730951f * (d + 1) * 0.5f);
// Clip the radius to the diagonal of the image to avoid autobuffer too large exception
radius = std::min(radius, (int) sqrt((double) img.cols*img.cols + img.rows*img.rows));
cos_t /= hist_width;
sin_t /= hist_width;