ssimulacra2
Score how visually similar a distorted image is to its original. tldr-pages
On several platforms
Several platforms
Score how visually similar a distorted image is to its original. Scores range from negative (very strong distortion) through 90 (visually lossless) to 100 (mathematically lossless).
Score a distorted image against the original (both images must have the same dimensions)
ssimulacra2 path/to/original.png path/to/distorted.pngIdentifyDisplay the usage and what each score range means
ssimulacra2Identify