zssd

Sum of squared differences

m = zssd(i1, i2) is the zero-mean sum of squared differences between the two equally sized image patches i1 and i2. The result m is a scalar that indicates image similarity, a value of 0 indicates identical pixel patterns and is increasingly positive as image dissimilarity increases.

Notes

• The ZSSD similarity measure is invariant to changes in image brightness offset.

See also

sdd, sad, ncc, isimilarity

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