bummer the adaptive jpeg compressor uses an old imagemagic and its quite a pain to finagle.
jpeg-archive did get close to the size of a default webp though which was impressive. 146kb above the webp.
from what i can tell they're doing some tricks with visual perception scores and then crunching numbers over a huge hoard of photographs and using that to train heuristics. seems to work quite well https://github.com/danielgtaylor/jpeg-archive
there is another one called adept that is based on some analysis stuff that i couldn't build https://github.com/technopagan/adept-jpg-compressor it does some kind of edge analysis and then quantizes that to make a bitmap of where to use high and low quality encoding.
i don't know if the webp encoders are this advanced and i'm fairly sure the jxl ones are not. when i tested jxl it actually gets pretty competitive size performance to webp despite ... being seemingly massively less complicated
shame we'll never get to use it.
from what i can tell they're doing some tricks with visual perception scores and then crunching numbers over a huge hoard of photographs and using that to train heuristics. seems to work quite well https://github.com/danielgtaylor/jpeg-archive
there is another one called adept that is based on some analysis stuff that i couldn't build https://github.com/technopagan/adept-jpg-compressor it does some kind of edge analysis and then quantizes that to make a bitmap of where to use high and low quality encoding.
i don't know if the webp encoders are this advanced and i'm fairly sure the jxl ones are not. when i tested jxl it actually gets pretty competitive size performance to webp despite ... being seemingly massively less complicated
shame we'll never get to use it.
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@icedquinn
That "adaptive JPG Compressor" is a complete joke.
His preview image weighs in at 196kb, and has so much destroyed details in the hair, and smudgy, blurry compression artifacts in the background, that it's not even funny.
I downloaded his preview png, saved it as 92% jpeg in Gimp, takes up only 116kb, and still looks better in every way.
Either he fucked up his preview images without realizing, or his script is a complete farce.
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@icedquinn
Here's the thing that perplexes me... a lossy image compressor already does what his script is supposed to do. It looks at an image, to see what areas are more detailed, and require more bits, and which can get by with less.
