Mean filter for smoothing images in Matlab

Question

I need to test some basic image processing techniques in Matlab. I need to test and compare especially two types of filters: mean filter and median filter.

To smooth

Answer 1

h = fspecial('average', n);
filter2(h, img);

See doc fspecial: h = fspecial('average', n) returns an averaging filter. n is a 1-by-2 vector specifying the number of rows and columns in h.