Eye detection using (MSE)

i have a project for real time detection , now I want to detect wether the eye is open or close, and i have to use several method , i save 5 frames for open and close eye and then i want to compare the real time frames with the one that has been saved. i use use function in matlab , i got numbers that shows the error like 86 , 60 . but i want to plot a graph for this and when I plot there is an error. i want a solution to find similarites between two frames and show that the eye is close. i hope that you understand what i mean

this is a part of the code

for ii=1:10 % Save this image to disk. FileName=sprintf('%3.3d.jpg',ii); fullImageFileName = fullfile(opFolder, FileName);

% Read it back in to check it. C = imread(fullImageFileName); err = mse(C, Eeye); plot(err); subplot(3,4,[9 10 11 12])

fprintf('\n The mean-squared error is %0.4f\n', err) end