I am trying to create a block average filter of an image.
In Matlab my code looks like:
ba=4; %block average block size
B = ones(ba)/ba^2;
out1 = conv2(double(rgb_img(:,:,1))/255,B,'valid');
out1 = out1(1:ba:end,1:ba:end);
out2 = conv2(double(rgb_img(:,:,2))/255,B,'valid');
out2 = out2(1:ba:end,1:ba:end);
out3 = conv2(double(rgb_img(:,:,3))/255,B,'valid');
out3 = out3(1:ba:end,1:ba:end);
I know how to do the first step using filter2D
how do I do the second step (take every 4th element)
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