sobel Function

public function sobel(img, maximum_value, is_canny) result(output)

sobel filter (sqrt version)

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
logical,	intent(in),	optional		::	is_canny	Whether is used in canny adge detection

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

Filtered image array