Flips the array A to be displayed with rasterImage, such that the first index runs from left to right and second index runs from bottom to top, like in standard Cartesian coordinates. In this way rasterImage(rasterflip(A)) has the same orientation as image(A).
rasterflip(A)n-by-m array of a monochromatic image or n-by-m-by-k array of a color image (where k is 3 or 4)