image manipulation with moving window.

i have a image of 256*256 and i have a moving window with (5*5).i want to move this moving window through out my original image,then i want to obtain new image.it's replace the one 5*5 block of the original image into one pixel.is there any method to insert some specific functions to the moving window.(like mean,median)

Answer 1

[Image Analyst]

Try this:

% Sliding mean:
windowSize = 5;
kernel = ones(windowSize, windowSize);
outputImage = conv2(double(grayImage), kernel, 'same');

If you want median, you can use blockproc (let me know if you need demos), or you can use nlfilter() in the Image Processing Toolbox if you want to do some custom operations within the window.

[mahesh chathuranga]

can you please give me demos.thank you

[Image Analyst]

See attached.