imgfilter.m

Some image filtering functions in matlab. Includes: Laplace Sharpening, UnsharpMask, Median filter

% Main image filtering function
% usage:
% [output_img] = imgFilter ([input_img], mask)
% mask - must be square matrix
% Effect depends on the filtering mask.

function [img_out] = imgFilter (img_in, mask)

i_max = size(img_in,1);         % X-size of input image
j_max = size(img_in,2);         % Y-size of input image

mask_size = size(mask,1);       % size of mask (must be square)
border = fix(mask_size/2);      % select border for filtering

img_in = imgResize(img_in,border);

for i=1:1:i_max
    for j=1:1:j_max
        img_out(i,j) = uint8(sum(sum(double(img_in(i:i+(2*border),j:j+(2*border))).*mask)));
    end
end