Which image is not like the others?

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Ron Volkovinsky
Ron Volkovinsky 2020-7-19
评论： Image Analyst 2020-7-19
I have four RGB images I1, I2, I3, and I4. 3 of them are exactly the same, and one is different. Is there an elegant solution to find which image is different? Currently, I'm using something like the following.
if ~isequal(I1, I2) & ~isequal(I1, I3) & ~isequal(I1, I4)
dif = I1
elseif ~isequal(I2, I1) & ~isequal(I2, I3) & ~isequal(I2, I4)
dif = I2
%etc.
end

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采纳的回答

Abhishek Gangwar
Abhishek Gangwar 2020-7-19
Compute difference of two images using "imabsdiff()" function, output of this function would be a matrix if both images are same, resulting matrix would have all zeros, you can use this logic.
for example:-
diff1 = imabsdiff(I1, I2);
diff2 = imabsdiff(I2, I3);
diff3 = imabsdiff(I3, I4);
diff4 = imabsdiff(I4, I1);
if sum(sum(diff1)) == 0 && sum(sum(diff2)) == 0 && sum(sum(diff3)) ~= 0 && sum(sum(diff4)) ~= 0
diff = I4;
elseif sum(sum(diff1)) == 0 && sum(sum(diff2)) ~= 0 && sum(sum(diff3)) ~= 0 && sum(sum(diff4)) == 0
diff = I3;
elseif sum(sum(diff1)) ~= 0 && sum(sum(diff2)) ~= 0 && sum(sum(diff3)) == 0 && sum(sum(diff4)) == 0
diff = I2;
elseif sum(sum(diff1)) ~= 0 && sum(sum(diff2)) == 0 && sum(sum(diff3)) == 0 && sum(sum(diff4)) ~= 0
diff = I1;
end
  1 个评论
Image Analyst
Image Analyst 2020-7-19
diff is a built in function so you should use a different name for your output variable.

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更多回答（1 个）

KSSV
KSSV 2020-7-19
编辑：KSSV 2020-7-19
n = numel(I1) ;
if nnz(I1==I2==I3) == n
dif = I4 ;
elseif nnz(I2==I3==I4) == n
dif = I1 ;
elseif nnz(I3==I4==I1) == n
dif = I2 ;
else
dif = I3 ;
end

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