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- 2014-04-18T11:28:52-07:00
- Forum: Bugs
- Topic: compare -metric NCC returns 0.866025 on identical images
- Replies: 4
- Views: 6612
compare -metric NCC returns 0.866025 on identical images
I have a (large) number of png images for which 'compare -metric NCC' produces unexpected values: $ compare -metric RMSE img.png img.png diff.png 0 (0) $ compare -metric NCC img.png img.png diff.png 0.866025 In other words, when comparing the image with itself, the NCC is 0.866025 - and this should ...