potok/opencv
1
0
Fork 0
mirror of https://github.com/opencv/opencv.git synced 2026-07-29 15:23:05 +04:00
Code Packages Releases Wiki Activity

Fixed cv::mul overflow for U16 type.

Browse Source
This commit is contained in:
Alexander Smorkalov
2026-02-27 09:30:16 +03:00
parent 6c374bebee
commit 01320ab612
2 changed files with 21 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
modules/core/src/arithm.simd.hpp
+9
View File
@@ -1437,6 +1437,15 @@ struct op_mul
{ return saturate_cast<T1>(a * b); }
};
template<typename Tvec>
struct op_mul<uint16_t, Tvec>
{
static inline Tvec r(const Tvec& a, const Tvec& b)
{ return v_mul(a, b); }
static inline uint16_t r(uint16_t a, uint16_t b)
{ return saturate_cast<uint16_t>(static_cast<uint32_t>(a) * static_cast<uint32_t>(b)); }
};
template<typename T1, typename T2, typename Tvec>
struct op_mul_scale
{
modules/core/test/test_arithm.cpp
+12
View File
@@ -3411,4 +3411,16 @@ TEST_P(Core_LUT, accuracy_multi2)
INSTANTIATE_TEST_CASE_P(/**/, Core_LUT, testing::Combine( LutIdxType::all(), LutMatType::all()));
TEST(Core_Arithm, mul_overflow_28557)
{
uint16_t data[] = {5000, 60000, 5000, 60000, 5000, 60000};
cv::Mat m(1, 6, CV_16U, data);
cv::Mat res = m.mul(m);
for (int i = 0; i < 6; i++)
{
EXPECT_EQ(65535, res.at<uint16_t>(0, i));
}
}
}} // namespace