Questions about the filter2D

#image-processing

asked 2013-10-25 22:41:16 -0600

Yi Zhang
21 ●4

The parameter anchor of the function filter2D indicates the relative position of a filtered point within the kernel; But what is the detail of processing the value of the anchor?

For example： image description

The default value (-1,-1) means that the anchor is at the kernel center, but I think in this case the anchor.x and anchor.y are not equal to -1? What is the real value of the anchor? And how dose OpenCV process the value of the anchor?

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answered 2013-10-26 04:26:00 -0600

Ilya Lavrenov
31 ●2

updated 2013-10-26 04:27:08 -0600

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).