- image-ref i pprocedure
Index into an PNM image or into a matrix. This is like indexing into a matrix except that the arguments are reversed. A matrix-ref takes the row and then the column, image-ref takes a point which is an (x,y) coordinate.
Index into an PNM image or into a matrix. This is like indexing into a matrix except that the arguments are reversed. A matrix-ref takes the row and then the column, image-ref takes a point which is an (x,y) coordinate.