# How to display the h s and v value difference in each frame of video

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SHOBA MOHAN on 19 Dec 2017
Commented: SHOBA MOHAN on 20 Dec 2017
Hi, I have calculated difference of h,s and v value of each frame in the video and want to display the value in order to random checkness of the difference value. I got final output as 360x640 matrix. Guess it displays difference value of last frame. Can anyone help me suggest the way forward.
% Determine how many frames there are.
% numberOfFrames = videoObject.NumberOfFrames;
vidHeight = videoObject.Height;
vidWidth = videoObject.Width;
for frame = 1 : numberOfFrames
% Extract the frame from the movie structure.
% Now let's do the differencing
alpha = 0.5;
if frame == 1
Background = thisFrame;
else
% Change background slightly at each frame
% Background(t+1)=(1-alpha)*I+alpha*Background
Background = (1-alpha)* thisFrame + alpha * Background;
end
subplot(2, 2, 3);
imshow(Background);
% Do color conversion from rgb to hsv
x=rgb2hsv(thisFrame);
y=rgb2hsv(Background);
% Split the hsv component to h,s,v value
Hx = x(:,:,1);
Sx = x(:,:,2);
Vx = x(:,:,3);
Hy = y(:,:,1);
Sy = y(:,:,2);
Vy = y(:,:,3);
dh=(abs(double(Hx) - double(Hy)));
ds1=(abs(double(Sx) - double(Sy)));
dv1=(abs(double(Vx) - double(Vy)));
disp(dh);
disp(ds1);
disp(dv1);
end
end

Image Analyst on 19 Dec 2017
In the loop, try this:
hFig = figure; % Bring up new figure.
subplot(2,2,1);
imshow(thisFrame);
subplot(2,2,2);
imshow(dh, []);
drawnow;
subplot(2,2,3);
imshow(ds1, []);
drawnow;
subplot(2,2,4);
imshow(dv1, []);
drawnow;
promptMessage = sprintf('Do you want to Continue processing,\nor Quit processing?');
titleBarCaption = 'Continue?';
buttonText = questdlg(promptMessage, titleBarCaption, 'Continue', 'Quit', 'Continue');
if contains(buttonText, 'Quit')
close(hFig);
break;
end
close(hFig);
SHOBA MOHAN on 20 Dec 2017
Thank you,i will try this

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