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A comment on Unicode-based scientific plotting for working in the terminal. Parent comment

Re:Unicode-based scientific plotting for working in the term... by dTal on Saturday June 06, 2020 @09:26AM (#23439024)
>it packs better than png when used in conjunction with the bzip2 packer.

Cute! But is it fair? I don't think it's lossless - the color depth is much reduced.

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Re:Unicode-based scientific plotting for working in the term... by sprash on Saturday June 06, 2020 @10:29AM (#23439422)
I took the reduced color depth into consideration. However on second glance it seems like Imagemagick does not compress PNG very efficiently with default settings. After recompressing with zopflipng PNG was easily able to beat bzip2 packed sixels. Results for 256 color 512x512 Lenna:

Sixel + bzip2: 245K

PNG Imagemagick: 467K

PNG Zopfli 10 Iterations: 188K

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