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TSC Meeting Notes 2024-10-17

TSC Meeting Notes 2024-10-17

Owned by Christina Tempelaar-Lietz, created
Oct 17, 2024
2 min read

Attendance:

Cary Phillips
Christina Tempelaar-Lietz
John Mertic
Joseph Goldstone
Kimball Thurston
Larry Gritz
Nick Porcino
Peter Hillman
Rod Bogart

Guests:

  • Li Ji, ILM

  • Michael Smith, HT-J2K compressor

Discussion:

  • Li Ji presented dry-run of “Use cases for benchmarking design” slides

    • Slides: https://github.com/lji-ilm/openexr-notes/blob/main/resources/Use%20cases%20for%20benchmarking%20design.pdf

    • What will be a good test, what are criteria? Needs to reflect real-world usage, be reproducible, scalable, understandable.

    • Joseph: looked at submission from Michael Smith for HT-J2K compressor, trying to determine whether he was doing relevant work. https://jpeg.org/jpeg2000/htj2k.html .

    • Questions about real-world production usage. What common patterns of calls are in real world? Approximate combinations / importance of patterns.

    • When someone tries to commit, benchmarks would be invoked?

    • Larry: might want to think of these items more on a task basis. Trying to get to one metric? Let people look at the cases and decide for themselves.

    • Larry: interesting cases for benchmarking

      • Hardware

      • Patching as add a patch, version to version comparisons are we getting better

      • Application that wraps EXR - how far off the best bare bones EXR case is it?

    • Aras P tests setup as an example: https://aras-p.info/blog/2021/08/04/EXR-Lossless-Compression/

    • Make tests useful for studios

    • Kimball - 4 major cases, covers a lot of ground:

      • Open in editing tool - reading whole window - test exists

      • Playback - OpenRV type access - stream in some portion of image

      • Compositing workflows - Nuke/Shake - very heavily scanlined, diff threads reading scanlines, concurrent scanline access

      • Rendering - test render from OSL could be used, Larry: access pattern is very particular

    • Larry: writing simpler to test, no access patterns to untangle.

    • Larry: content types

      • photographic - samples in DPEL now?

      • renderer output

      • texture input, a few diff patterns

    • HDR Photographic survey http://markfairchild.org/HDR.html

    • Joseph - no command tool to convert from cameras to OpenEXR

    • Michael Smith: standard photographic tests ASC StEM2 - Standard Evaluation Material 2 - DPEL

    • More reference content: NETFLIX OPEN CONTENT

       

       

 

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