Prediction-Encoded Pixels image format

6 comments

• gforce_de 6 hours ago

  I really needs more benchmarks, especially decompression time. Also the sizes are interesting for very small images, but for real images, there are maybe better lossy variants:

    nz_scene - PEP = 73.542 bytes,
         lossy-PNG = 43.557 bytes,
        lossy-WEBP = 26.654 bytes,
    lossy-mozcjpeg = 15.716 bytes
  

  So it's not about filesize here, it must be decompression speed.
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  • msephton 6 hours ago

    The creator says that the PEP image format is meant for small, limited colour images and of course it does lossless compression.

• msephton 8 hours ago

  I've put together a quick CLI for macOS and a very naïve benchmarking suite to see what the gains are like. Compared to optimised PNG, it's worse most of the time but the interesting thing is when it is better. I'm not sure there's a hard and fast rule, at least not that I've found so far.

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  • mrbluecoat 6 hours ago

    Link?

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    • msephton 6 hours ago

      pepr on GitHub https://github.com/gingerbeardman/pepr (macOS-only)

      Also I posted some results earlier today: https://twitter.com/gingerbeardman/status/195993422257285161...

      And I already added support to my pixel art app, Dottie, just for kicks https://twitter.com/gingerbeardman/status/195998796230676915...

• tobinc 4 hours ago

  Endesga is always cooking up something interesting.