colour.models.log_decoding_ACEScct

colour.models.log_decoding_ACEScct(ACEScct, constants={'A': 10.5402377416545, 'B': 0.0729055341958355, 'X_BRK': 0.0078125, 'Y_BRK': 0.155251141552511})[source]

Defines the ACEScct colourspace log decoding / electro-optical transfer function.

Parameters:
  • ACEScct (numeric or array_like) – ACEScct non-linear value.
  • constants (Structure, optional) – ACEScct constants.
Returns:

lin_AP1 value.

Return type:

numeric or ndarray

References

[TheAcademyofMotionPictureArtsandSciences2014q], [TheAcademyofMotionPictureArtsandSciences2014r], [TheAcademyofMotionPictureArtsandSciences2016c], [TheAcademyofMotionPictureArtsandSciencese]

Notes

Domain Scale - Reference Scale - 1
ACEScct [0, 1] [0, 1]
Range Scale - Reference Scale - 1
lin_AP1 [0, 1] [0, 1]

Examples

>>> log_decoding_ACEScct(0.413588402492442)  # doctest: +ELLIPSIS
0.1799999...