CAN SOMEONE PLEASE INSERT A BASIC BAGROUND SUBTRACTION LOOP IN THIS CODE PLEASE..IT IS WRITTEN IN MATLAB..THANKYOUUU

v = VideoReader('IMG_6976.m4v');

vidWidth = v.Width;

vidHeight = v.Height;

mov = struct('cdata',zeros(vidHeight,vidWidth,3,'uint8'),...

'colormap',[]);

k = 1;

while hasFrame(v)

mov(k).cdata = readFrame(v);

k = k+1;

end

image(mov(5).cdata)

hf = figure;

set(hf,'position',[150 150 vidWidth vidHeight]);

movie(hf,mov,1,v.FrameRate);

close