block matching image issue
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When I did blockmatching algorithm on the tennis man image, and did a comparaison between the original and reconstructed image I got this black boxes, why?
5 Comments
Walter Roberson
on 8 Apr 2023
(Just showing the output, not trying to debug the problem)
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Answers (1)
Walter Roberson
on 8 Apr 2023
Your attached code (but not your posted code) has
imshow (F2_recons - e1)
where both of those arrays are double precision and happen to contain integer values. The difference between the two arrays ranges between -255 and +206 . You are passing that array of values -255 to +206 to imshow() as a double precision array. By default, when passed a double precision array, imshow() assumes that the valuable part of the data is the range 0 to 1, and that anything below 0 should be treated as 0 and anything above 1 should be treated as 1. So you more or less end up binarizing the difference array.
You should be considering using
imagesc(F2_recons - e1);
colormap(gray)
2 Comments
Walter Roberson
on 10 Apr 2023
Sorry, no, I do not see anything in your code that corresponds to vectors of motion, or anything that corresponds to motion at all. I cannot tell what you are calculating at all.
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