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| Iref = imread('lena_gray_512.png'); % https://i.imgur.com/LHqmBwZ.png | |
| I = imread('fabio_gray_512.png'); % https://i.imgur.com/jGM4euO.png | |
| figure; | |
| montage({Iref,I}); | |
| score = multissim(I,Iref) | |
| # 0.3701 | |
| [ssimval,ssimmap] = ssim(I,Iref); | |
| ssimval | |
| # ssimval = 0.4525 |
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ssim(I,Iref)gives me0.3451in MATLAB R2018b, which matches the result ofImageQualityIndexes.assess_ssim:0.34505006577497543multissimis introduced in R2020a.