MATLAB: How to Slide a 3X3 window across a pixel of the image in matlab.

slide window

I have an binary image I want to slide 3*3 window across it.

conv2 or imfilter all are sliding window concept.

For a "moving" sum - the sum in a window - you can use conv(), or conv2() in two dimensions:

windowWidth = 15; % or whatever.

movingSum = conv(oneDsignal, ones(1, windowWidth));

for the moving average:

windowWidth = 15; % or whatever.
movingAverage = conv(oneDsignal, ones(1, windowWidth) / windowWidth);

The loop is unnecessary.

% First element of counts is the last row count:

counts(size(BW,1):-1:1,:) = sum(BW == 1,2);

or you can simply use:

counts = flipud(sum(BW == 1,2));