TITLE:MS(multi scale)-SSIM
[[SSIM]] > [[MS-SSIM]]

- MULTI-SCALE STRUCTURAL SIMILARITY FOR IMAGE QUALITY ASSESSMENT
-- <del> http://www.cns.nyu.edu/~zwang/files/papers/msssim.pdf </del>
--  https://ece.uwaterloo.ca/~z70wang/publications/msssim.pdf