/
TSC Meeting Notes 2025-02-06

TSC Meeting Notes 2025-02-06

Owned by Cary Phillips
Feb 11, 2025
2 min read

 

Attendance:

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

Guests:

  • Pierre-Anthony Lemieux, Sandflow Consulting

  • Carol Payne, OCIO

  • Doug Walker, OCIO

  • Alyssa Alexis

Discussion:

  • HTJ2K:

    • OpenEXRCore should be a C-only implementation

    • Can replace OpenJPH with any JPEG2000: Kakadu, OpenJPG

    • Might produce different files, but will read.

    • Mapping between channel order between OpenEXR and encoder stream. Channel order is now written at each chunk.

    • Kimball:

      • Goal: get to OSs don’t have to recompile w/OpenEXR Security patch

      • Goal: ability to run in an environment where you want to control the allocators.

      • Goal: can run on embedded devices

      • Issue with PR: it’s not using the OpenEXRCore allocator, it’s allocating via std lib.

      • Disappointing OpenJPH is not C, since it’s mostly C code

    • OpenJPH: it’s the highest performance and most actively maintained.

    • It does only Part 15.

  • Carol/Doug - Color Interop Forum

    • Color metadata management

    • Would like metadata to be the next topic in the interop meeting, Feb 24, noon Pacific.

    • Larry: We’re the ones to bless the names. Where can people count on the meaning? Correct the decades old confusion about chromaticities. 

    • Larry: we don’t have a dog in the fight.

    • Foundry involved? Yes, Mark Titchner

    • Custom metadata? You’d need support before you could rely on it. The advantage is that you have a better chance of getting it right.

    • It would be good to have some guidance about what channels should be color managed and which should not.

    • Peter: It was Piotr’s idea to lock down the chromaticities.

    • Peter: There are carefully written rules that are completely ignored.

    • Idea is to have a standard set of names, independent of OCIO.

    • Color Interop Forum published a list of names last year.

    • Texture Asset Color Spaces: https://docs.google.com/document/d/1IV3e_9gpTOS_EFYRv2YGDuhExa4wTaPYHW1HyV36qUU/edit?usp=sharing

    • Don’t like the ability to lie. Can we definite a dozen things that cannot be overridden.

    • Biggest issue is the Chromaticities



Related content