Gray-scale or colored damaged image recovery

% Damaged gray-scale or colored image recovery
% This is a simple prog. for treating damaged areas in gray scale images.
% The recovery algorithm depends on replacing the missing pixels by the
% median of the non-damaged pixels lying within a 3x3 mask centered on the
% treated pixel. The algorithm is efficient for smooth areas, and it is
% less efficient in recovering areas belonging to different regions in the
% image. The prog. is tested on a segment of the rice.png image. The
% damaged area is determined by the user.
%
% By: Abdulrahman Ikram Siddiq
% Kirkuk - IRAQ
% Saturday Nov.5th 2011 10:50 PM