How to store the difference between adjacent pixel values of image
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I have a black and white image and I need to store the value of the differences between each adjacent pixel so that i may plot the values in a histogram.
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Benjamin Thompson
on 11 Apr 2022
Edited: Benjamin Thompson
on 11 Apr 2022
Use imfilter with a 1D filter argument. If your h is vertical then the difference operation is in the vertical direction. If the filter coefficients h are horizontal then the difference operation is horizontal.
>> imshow(phantom)
>> imshow(imfilter(phantom, [-1 1]))
>> imshow(imfilter(phantom, [-1 1]'))
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DGM
on 11 Apr 2022
If all you want is the difference in one direction, then just use diff().
A = randi([0 255],10);
dAdx = diff(A,1,2);
histogram(dAdx(:))
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