zncc

Normalized cross correlation

m = zncc(i1, i2) is the zero-mean normalized cross-correlation between the two equally sized image patches i1 and i2. The result m is a scalar in the interval -1 to 1 that indicates similarity. A value of 1 indicates identical pixel patterns.

Notes

• The ZNCC similarity measure is invariant to affine changes in image intensity (brightness offset and scale).

See also

ncc, sad, ssd, isimilarity

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