PR: Implement Support for Executing CLF Workflows

[MichaelMauderer]

Summary

Add support for executing CLF workflows defined as per https://docs.acescentral.com/specifications/clf/#common-lut-format-clf-a-common-file-format-for-look-up-tables

Closes #636

TODO

• Extend documentation
• Add tests for more complex workflows
• Add better error handling for invalid inputs
• Create a release of the CLF IO package and update the pyproject.tomlto use that instead of directly referring to the repo.

Preflight

Code Style and Quality

• Unit tests have been implemented and passed.
• Pyright static checking has been run and passed.
• Pre-commit hooks have been run and passed.
• New transformations have been added to the Automatic Colour Conversion Graph.
• New transformations have been exported to the relevant namespaces, e.g. colour, colour.models.

Documentation

• New features are documented along with examples if relevant.
• The documentation is Sphinx and numpydoc compliant.

[KelSolaar]

Thanks Michael for the work! This is just a first batch of important notes WRT to the implementation, core idea is that we try as much as possible to use our existing code.

[KelSolaar]

Major

This should be an optional dependency as we do not want to hard-depend on CLF.

We will thus need a new requirement entry and callable here: https://github.com/colour-science/colour/blob/develop/colour/utilities/requirements.py

We will also want to track its version in colour.utilities.describe_environment

[KelSolaar]

Minor

This is fine for now but we will need to release it on Pypi.

[KelSolaar]

Minor

Do you have the precommit hooks running, it looks like isort is not really running.

[KelSolaar]

Major

We wrote the functions for this during GSoc, let's please use those:

colour/colour/models/rgb/transfer_functions/log.py

Line 77 in 6341ee8

def logarithmic_function_basic(

,

colour/colour/models/rgb/transfer_functions/log.py

Line 154 in 6341ee8

def logarithmic_function_quasilog(

and

colour/colour/models/rgb/transfer_functions/log.py

Line 233 in 6341ee8

def logarithmic_function_camera(

[KelSolaar]

Major

We also wrote the functions for this during GSoc, let's please use those:

colour/colour/models/rgb/transfer_functions/exponent.py

Line 43 in 6341ee8

def exponent_function_basic(

and

colour/colour/models/rgb/transfer_functions/exponent.py

Line 191 in 6341ee8

def exponent_function_monitor_curve(

[KelSolaar]

Minor

We should be able to do something along the line of np.sum(weights * value, axis=-1) to avoid the tsplit.

[KelSolaar]

Major

We should try to use colour.io.LUTSequence here.