diff --git a/modules/nonfree/src/sift.cpp b/modules/nonfree/src/sift.cpp index 5a7fd89407..64b17c3628 100644 --- a/modules/nonfree/src/sift.cpp +++ b/modules/nonfree/src/sift.cpp @@ -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;