laplacian Function

public pure function laplacian(img, maximum_value) result(output)

laplacian filtering (8 neighborhood)

Arguments

Type	Intent	Optional	Attributes		Name
integer,	intent(in)			::	img(:,:,:)	Image array. has pixel values.
integer,	intent(in)			::	maximum_value	max value of a pix. default to 255.

Return Value integer, allocatable, (:,:,:)

filtered image array.