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Answer Posted / bo b watz
Morphological Laplacian is the average of erosion and dilation minus the parent image:
Lapl = (Ero + Dil)/2 - Img
Where Erosion and Dilation (of the parent image) use the same structuring element.
The Laplacian above may contain negative values, that may be truncated if f.ex. the output is an 8-bit grayscale. In that case you may wish to add 128 to the expression.
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