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Fix potential NaN in cv::norm.

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There can be an int overflow.
cv::norm( InputArray _src, int normType, InputArray _mask ) is fine,
not cv::norm( InputArray _src1, InputArray _src2, int normType, InputArray _mask ).
This commit is contained in:
Vincent Rabaud
2021-06-11 22:03:33 +02:00
parent 3cf4375387
commit c8268e65fd
2 changed files with 10 additions and 1 deletions
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modules/core/src/norm.cpp
+1 -1
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@@ -1171,7 +1171,7 @@ double norm( InputArray _src1, InputArray _src2, int normType, InputArray _mask
// special case to handle "integer" overflow in accumulator
const size_t esz = src1.elemSize();
const int total = (int)it.size;
const int intSumBlockSize = normType == NORM_L1 && depth <= CV_8S ? (1 << 23) : (1 << 15);
const int intSumBlockSize = (normType == NORM_L1 && depth <= CV_8S ? (1 << 23) : (1 << 15))/cn;
const int blockSize = std::min(total, intSumBlockSize);
int isum = 0;
int count = 0;