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 | 1 | initial version |
Let imagine Laplacian filter 3x3 kernel:
Let consider pixel with the following neighborhood:
1 1 1 1 255 1 1 1 1
After applying Laplacian filter pixel value should be equal -4*255 + 4 = -1016
If we continue use CV_8U type (unsigned char 0-255) we can't save this value. So we should change type to CV_16S (signed short int, –32,768 to 32,767)
