Object Tracking in a LIVE VIDEO STREAM

% %run first in command
% ONCE PER MATLAB SESSION
% vid = videoinput('winvideo', '1', 'YUY2_160x120');
% set(vid,'ReturnedColorSpace','rgb');
% set(vid,'TriggerRepeat',Inf);
% vid.FrameGrabInterval = 5;
% start(vid);
%------

figure;
while(vid.FramesAcquired<=1000) % Stop after 1000 frames data = getdata(vid,2); diff_im = imabsdiff(data(:,:,:,1),data(:,:,:,2)); %background subtraction
diff = rgb2gray(diff_im);
diff_bw = im2bw(diff,0.2);
bw2 = imfill(diff_bw,'holes');
s = regionprops(diff_im, 'centroid');
cd = s.Centroid;
centroids = cat(1, s.Centroid);
imshow(data(:,:,:,2));
hold(imgca,'on');
plot(imgca,centroids(:,1),centroids(:,2),'g*');

hold on;
rectangle('Position',[cd(:,1) cd(:,2) 20 20],'LineWidth',2,'EdgeColor','b');
hold(imgca,'off');

end

stop(vid)