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fixes #5066: laplacian: "y" may contain negative values

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This commit is contained in:
Alexander Alekhin 2015-12-14 18:13:57 +03:00
parent 5cdf0e3e89
commit 1305962af7
1 changed files with 1 additions and 1 deletions
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modules/imgproc/src/deriv.cpp
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@ -858,7 +858,7 @@ void cv::Laplacian( InputArray _src, OutputArray _dst, int ddepth, int ksize,
Mat src = _src.getMat(), dst = _dst.getMat();
int y = fx->start(src), dsty = 0, dy = 0;
fy->start(src);
const uchar* sptr = src.ptr(y);
const uchar* sptr = src.ptr() + src.step[0] * y;
int dy0 = std::min(std::max((int)(STRIPE_SIZE/(CV_ELEM_SIZE(stype)*src.cols)), 1), src.rows);
Mat d2x( dy0 + kd.rows - 1, src.cols, wtype );