Chromium jpegxl issue closed as won't fix

Re:Chromium jpegxl issue closed as won't fix by gruez on Monday May 20, 2024 @11:20AM (#40416522)

>PNG will normally get at least 2:1 compression on photos

"At least"? I tried with the first photo on the wikipedia home page: https://en.wikipedia.org/wiki/File:City_Building_Champaign_I...

Saving it as a 24-bit bmp (ie. uncompressed) gets me 12,180KB. Saving it as a PNG gets me 7,157KB, which is 1.7:1

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Re:Chromium jpegxl issue closed as won't fix by SigmundA on Monday May 20, 2024 @12:51PM (#40417418)

I just did the same in preview on my Mac (export TIFF uncompressed - 12mb -> export PNG) and got 5.4mb so 2.2:1 and on https://cloudconvert.com 4.6mb with default settings.

PNG does have some tuning parameters that can effect the final size usually just speed vs size.

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Re:Chromium jpegxl issue closed as won't fix by mappu on Tuesday May 21, 2024 @04:02PM (#40433157)

Using plain gzip -9 on the 12MB uncompressed image, i get 6953 KiB, smaller than your PNG. Using a stronger gzip compressor (zopfli) i get as little as 6294 KiB.

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