WebP is so great except it's not

Re:WebP is so great except it's not by tivert on Friday December 15, 2023 @11:55AM (#38655988)

> I opened the first two pictures in separate tabs and switched quickly between them. There is zero difference. Tried it on two different monitors, Chrome and Firefox. Same with the pictures of the guy at the end.

One easy difference to spot is the background in this pair is posterized (https://en.wikipedia.org/wiki/Posterization) in webp but not in jpg:

https://eng.aurelienpierre.com/wp-content/uploads/sites/8/20...

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Re:WebP is so great except it's not by Izkata on Friday December 15, 2023 @01:48PM (#38657197)

For clarity if anyone is still confused, on Wikipedia's example image, look at the snakes's shadow - that's what's happening to the background in the blog's image.

I didn't know the word "posterization", so I'd describe this (slightly?) more simply as a stepped gradient instead of a smooth gradient.

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