I need to find which lossy image compression technique is the best. I chose to test JPEG, WebP and BPG. Which criteria can I choose for comparison apart from quality and speed of compression and how can I measure each criteria using tools like PSNR?

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    $\begingroup$ A better tool might be a human judging the quality of the compressed image. $\endgroup$ – Yuval Filmus Oct 17 '19 at 12:32
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    $\begingroup$ "There are various tests for measuring distortion, but none are as good as the human eye. And we do not always agree on which images look better." (Matt Mahoney on Quora) $\endgroup$ – Yuval Filmus Oct 17 '19 at 12:34

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