| Lap | R Documentation | 
Laplacian filter
Lap(x, choice = 1, ...)
| x | An image matrix | 
| choice | What discrete kernel shall be used if several available#' | 
| direction | direction for Sobel edges detection. Can be 'left', 'right', or 'both' | 
The convolved image
Allan Sauvat, allan.sauvat@gustaveroussy.fr
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