Skip to content

Add Apple Log 2 color space #163

Description

@doug-walker

Proposed name: "Apple Log 2"
Proposed interop ID: ocio:applelog_applewg_scene

In addition, we should add a linear color space for the primaries.
Proposed name: "Linear Apple Wide Gamut"
Proposed interop ID: ocio:linear_applewg_scene

@carolalynn , please review.

The white paper does not specify what chromatic adaptation to use, so I propose using Bradford as it is the most consistent with ACES.

Here is what they should look like:

  - !<ColorSpace>
    name: Apple Log 2
    aliases: [ocio:applelog_applewg_scene]
    interop_id: ocio:applelog_applewg_scene
    family: Input/Apple
    equalitygroup: ""
    bitdepth: unknown
    isdata: false
    categories: [file-io]
    encoding: log
    allocation: uniform
    to_scene_reference: !<GroupTransform>
      children:
        - !<BuiltinTransform> {style: CURVE - APPLE_LOG_to_LINEAR}
        - !<MatrixTransform> {matrix: [0.694961049318096, 0.241405268785364, 0.06363368189654, 0, 0.0473627464149325, 1.00429592505428, -0.0516586714692158, 0, -0.021989789359883, -0.0289891049714743, 1.05097889433136, 0, 0, 0, 0, 1]}

  - !<ColorSpace>
    name: Linear Apple Wide Gamut
    aliases: [ocio:linear_applewg_scene]
    interop_id: ocio:linear_applewg_scene
    family: Input/Apple
    equalitygroup: ""
    bitdepth: unknown
    isdata: false
    categories: [file-io]
    encoding: scene-linear
    allocation: uniform
    to_scene_reference: !<MatrixTransform> {matrix: [0.694961049318096, 0.241405268785364, 0.06363368189654, 0, 0.0473627464149325, 1.00429592505428, -0.0516586714692158, 0, -0.021989789359883, -0.0289891049714743, 1.05097889433136, 0, 0, 0, 0, 1]}

Activity

  1. doug-walker commented on Oct 13, 2025

    @doug-walker
    ContributorAuthor

    At the 2025-10-13 TSC meeting, the group preferred using applelog_applewg_scene rather than my original proposal of applelog_awg_scene, so I edited the description above accordingly.

  2. carolalynn commented on Oct 15, 2025

    @carolalynn
    Contributor

    Yep, this looks good. CAT is indeed Bradford.

  3. added a commit that references this issue on Sep 12, 2026
    82aea39
  4. added a commit that references this issue on Sep 23, 2026
    a1d4bac
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Metadata

Metadata

Assignees

No one assigned

    Labels

    enhancementNew feature or request

    Type

    No type

    Projects

    No projects

      Milestone

      No milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions