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the anchor Point(-1, -1) means that OpenCV function must automatically puts a filtered pixel at the kernel center. For example, if a kernel has size Size(5, 5) then an anchor will be Point(2, 2).

the anchor Point(-1, -1) means that OpenCV function must automatically puts a filtered pixel at the kernel center. For example, if a kernel has size Size(5, 5) and you put an anchor Point(-1, -1) then an the real anchor will be Point(2, 2).