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[GH-ISSUE #221] Feature request: Support upload of lossless image format. #2884

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opened 2026-03-20 22:05:23 +01:00 by sascha_hemi · 1 comment
sascha_hemi commented 2026-03-20 22:05:23 +01:00
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Originally created by @dreirund on GitHub (Feb 7, 2024).
Original GitHub issue: https://github.com/OpenEPaperLink/OpenEPaperLink/issues/221

Is your feature request related to a problem? Please describe.

The wiki says that the images which can be uploaded should be JPEG.

This is a bad choice:

  • JPEG is designed for (quasi)continuous colour space. The tags have discrete colours (two, three or four). JPEG is not designed for that.
  • JPEG creates artifacts.
  • Lossless formats are both smaller AND without artifacts with discrete colour space.

Describe the solution you'd like

Support lossless image format.

Low level like pbm, high level like PNG, or embedded-friendly like QOI, or something else.

Your choice. But lossless.

Originally created by @dreirund on GitHub (Feb 7, 2024). Original GitHub issue: https://github.com/OpenEPaperLink/OpenEPaperLink/issues/221 ### Is your feature request related to a problem? Please describe. [The wiki says](https://github.com/jjwbruijn/OpenEPaperLink/wiki/Image-specifications) that the images which can be uploaded should be JPEG. This is a bad choice: * JPEG is designed for (quasi)continuous colour space. The tags have discrete colours (two, three or four). JPEG is not designed for that. * JPEG creates artifacts. * Lossless formats are _both_ smaller AND without artifacts with discrete colour space. ### Describe the solution you'd like Support lossless image format. Low level like pbm, high level like PNG, or embedded-friendly like QOI, or something else. Your choice. But lossless.
sascha_hemi added the enhancement label 2026-03-20 22:05:23 +01:00
sascha_hemi commented 2026-03-20 22:05:24 +01:00
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@jjwbruijn commented on GitHub (Feb 7, 2024):

You're a recordholder opening issues. Please let me know when you've forked this project and have built a version with all of your issues fixed.

<!-- gh-comment-id:1931695368 --> @jjwbruijn commented on GitHub (Feb 7, 2024): You're a recordholder opening issues. Please let me know when you've forked this project and have built a version with all of your issues fixed.
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Reference: starred/OpenEPaperLink#2884
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