https://bugzilla.wikimedia.org/show_bug.cgi?id=47311

--- Comment #4 from Tim Starling <[email protected]> ---
I've looked at the sharpening code in vipsthumbnail.c git master. It's much
simpler than what MediaWiki does. I am sure that MediaWiki is doing a better
job of this than vipsthumbnail.

The sharpening parameters that we use (radius and threshold) are carefully
chosen, and changing them has caused complaints in the past (bug 24857). So I
was keen to have a scaling system that reproduced the current results as nearly
as possible. That's why I asked Bryan to make VipsScaler the way it is.

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