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photo: fix integer overflow

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There is no cast to wide integer type:
    std::numeric_limits<ST>::max() * std::numeric_limits<ST>::max()
This commit is contained in:
Alexander Alekhin 2017-06-09 00:16:58 +00:00
parent 0213b508dc
commit e665be1d70
1 changed files with 2 additions and 2 deletions
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4
modules/photo/src/fast_nlmeans_denoising_opencl.hpp
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@ -52,8 +52,8 @@ static bool ocl_calcAlmostDist2Weight(UMat & almostDist2Weight,
FT almostDist2ActualDistMultiplier = (FT)(1 << almostTemplateWindowSizeSqBinShift) / templateWindowSizeSq;
const FT WEIGHT_THRESHOLD = 1e-3f;
int maxDist = normType == NORM_L1 ? std::numeric_limits<ST>::max() * cn :
std::numeric_limits<ST>::max() * std::numeric_limits<ST>::max() * cn;
WT maxDist = normType == NORM_L1 ? (WT)std::numeric_limits<ST>::max() * cn :
(WT)std::numeric_limits<ST>::max() * (WT)std::numeric_limits<ST>::max() * cn;
int almostMaxDist = (int)(maxDist / almostDist2ActualDistMultiplier + 1);
FT den[4];
CV_Assert(hn > 0 && hn <= 4);