hi, i'm now doing a program to calculate the pixels for the comparison between two images. both image should have the same size, 16 x 16 pixels, and in a matrices representation. any suggestion that could help me? does 2-dimensional array is reasonable? because if i do the 2-dimensional array, i need to declare 256 variables, and if suddenly i need to change the size into 24 x 24 pixels, it's gonna be more declaration.... could anyone can give a suggestion? thank you