Process

aces-dev Discovery & Classification

The config generation process starts with a set of definitions and classes to discover, parse and classify the CTL transforms from aces-dev:

• opencolorio_config_aces.discover_aces_ctl_transforms()

• opencolorio_config_aces.classify_aces_ctl_transforms()

• opencolorio_config_aces.print_aces_taxonomy()

Note

This approach allowed us to improve the consistency of the CTL transforms ACEStransformID while fixing various filename issues.

Using ACES2065-1 and OCES as connection spaces, it is possible to build a colour conversion graph with all the high-level relevant transforms.

• opencolorio_config_aces.build_aces_conversion_graph()

• opencolorio_config_aces.plot_aces_conversion_graph()

Analytical & Reference Configs Generation

The colour conversion graph is then used to create the Analytical config that maps 1-to-1 the aces-dev CTL transforms to theoretical OpenColorIO builtin transforms. This config does not work but it is useful to test basic generation capabilities whilst diagnosing issues in the mapping.

The Reference config is driven by a CSV file generated from a spreadsheet mapping the ACEStransformID to OpenColorIO builtin transforms.

• opencolorio_config_aces.generate_config_aces()

CLF Transforms Generation, Discovery & Classification

The working group decided to express additional colour transforms using CLF. Some CLF transforms can be serialised into a config which reduces the need for external files. Each CLF transform has a CLFtransformID specified according to the CLF Formatting for ACES OCIO Config document.

The repository contains code to generate, discover and classify the additional CLF transforms that the CG and Studio configs require.

• opencolorio_config_aces.discover_clf_transforms()

• opencolorio_config_aces.classify_clf_transforms()

• opencolorio_config_aces.print_clf_taxonomy()

CG Config Generation

The CG config generator also uses a CSV file generated from a spreadsheet that expresses which ACEStransformID should be used from the Reference config and which CLFtransformID should be used from the shipped CLF transforms.

• opencolorio_config_aces.generate_config_cg()

The conversion process is as follows:

aces-dev Discovery & Classification -> Reference Config Generation -> CLF Transforms Generation, Discovery & Classification -> CG Config Generation

Studio Config Generation

The Studio config generator follows the same approach but uses a different pivot table of the spreadsheet.

• opencolorio_config_aces.generate_config_studio()

The conversion process is as follows:

aces-dev Discovery & Classification -> Reference Config Generation -> CLF Transforms Generation, Discovery & Classification -> Studio Config Generation