Similarity check between two binary images

Question

I want to apply a check if the two binary images are similar. I subtract a binary image 1 from the other to get a difference image. where Confidence = (sum(Image_1(:)) - Overlapping_Area)*100 /sum(Image_1 (:)) ;   It would not be reliable if the matching images have lot of shapes and rest borders lines in difference image. Any idea?

Kshitij Singh · Accepted Answer

Try the Dice Similarity Coefficient
 
 
% Find out where either mask is true.
unionMask = mask1 | mask2;
% Find the differences. Not used - just for fun/visualization.
%xorMask = xor(flippedMask, mask);
% Find the common/overlap area.
andMask = mask1 & mask2;
% Compute the Dice Coefficient
dice = nnz(andMask) / nnz(unionMask);

Similarity check between two binary images

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