Fringe Visibility Homework: Obtain Intensity Values in MATLAB

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Homework Statement


Hi. I'm attempting to find the fringe visibility of an interference pattern from a diffraction grating, using MATLAB. I have an image of this pattern, and have used the following code so far in MATLAB:
Code: 
myimage = imread('IMG_0166.JPG')
image = rgb2gray(myimage);
imshow(image)
I'm struggling to find a way in which i can go about obtaining the intensity values from this image.

Homework Equations


The fringe visibility is given by:
Visibility = (Imax-Imin)/(Imax+Imin)

The Attempt at a Solution


Above.

Any help would be appreciated,

Thanks.
 
Last edited:
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Is anyone able to help please?
 

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