. im2double (ing): Converts a uint8 matrix (or image) ing into a matrix with double values or values of double precision, meaning that they can represent any real number, up to the computer's precision ability. At the same time, this command rescales the values in the image in the range between 0 and 1. The double precision as well as rescaling makes the image ready for processing since most built-in MATLAB commands require double precision variables. At the same time, double precision limits the issue of round-off errors when one performs calculations