could you please explain the following code?
k = zeros(img_h, img_w, 4);k(:,:,1) = (fxx./((1 + fx.^2).^(3/2))).*fvr; % hor
k(:,:,2) = (fyy./((1 + fy.^2).^(3/2))).*fvr; % ver
k(:,:,3) = (f11./((1 + f1.^2).^(3/2))).*fvr; % \
k(:,:,4) = (f22./((1 + f2.^2).^(3/2))).*fvr; % /
Wr = 0;bla = k(:,:,1) > 0;for y=1:img_h for x=1:img_w if(bla(y,x)) %%% I cant understand (bla(y,x))
Wr = Wr + 1; end
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