- pix-subtract-gray pix-d pix-1 pix-2procedure
Returns pointer to image which is pixel difference of pix-1 and pix-2. Unless #f, pix-d may specify the destination image, and pix-d may be equal to pix-1 for an in-place change.
Returns pointer to image which is pixel difference of pix-1 and pix-2. Unless #f, pix-d may specify the destination image, and pix-d may be equal to pix-1 for an in-place change.