im2int32 - Convert image to 32-bit signed integers
im2int32 convert intensity or RGB images to 32-bit signed integers. If the input is of class int32, the output image is identical to it. Otherwise, im2int32 rescales or offsets the data, and returns the equivalent image of class int32.
im2bw, im2uint8, im2int8, im2uint16, im2int16, im2double, mat2gray,