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by jonsneyers 842 days ago
Humans generally tend to prefer smoothing over visible blocking artifacts. This is especially true when a direct comparison to the original image is not possible. Of course different humans have different tastes, and some do prefer blocking over blur. SSIMULACRA2 is based on the aggregated opinions of many thousands of people. It does care more about blur than metrics like PSNR, but maybe not as much as you do.