https://bugzilla.wikimedia.org/show_bug.cgi?id=67525
--- Comment #22 from Gilles Dubuc <[email protected]> --- I can finally repro and I know why it's happening: currently mediawiki doesn't do any sharpening for PNGs. It does for JPGs, and the extra sharpening passes in the chaining compensate the quality loss in terms of perceived quality. I had been testing mostly with JPGs during the development of this feature, which is why I missed the fact that PNGs are different in regards to sharpening. In order to preserve a decent amount of perceived quality, PNGs need to be sharpened when chained. I'll experiment locally and come up with a follow-up patch, but since the impact on perceived quality had only been tested on JPGs, I think that releasing this to production should be restrained to JPGs at first. I'll treat the release for PNG separately and I'll run another user test for perceived quality on them. -- You are receiving this mail because: You are the assignee for the bug. You are on the CC list for the bug. _______________________________________________ Wikibugs-l mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/wikibugs-l
