colour.models.aces_rgb_idt Module

ACES RGB Colourspace - Input Device Transform

Defines the ACES RGB colourspace Input Device Transform utilities:

See also

RGB Colourspaces IPython Notebook

References

[1]http://www.oscars.org/science-technology/council/projects/aces.html (Last accessed 24 February 2014)
[2]Academy Color Encoding Specification (ACES) (Last accessed 24 February 2014)
colour.models.aces_rgb_idt.spectral_to_aces_relative_exposure_values(spd, illuminant=<colour.colorimetry.spectrum.SpectralPowerDistribution object at 0x102e126d0>)[source]

Converts given spectral power distribution to ACES RGB colourspace relative exposure values.

Parameters:
  • spd (SpectralPowerDistribution) – Spectral power distribution.
  • illuminant (SpectralPowerDistribution, optional) – Illuminant spectral power distribution.
Returns:

ACES RGB colourspace relative exposure values matrix.
Return type:

ndarray, (3,)

Notes

  • Output ACES RGB colourspace relative exposure values matrix is in domain [0, 1].

See also

colour.colorimetry.tristimulus.spectral_to_XYZ()

References

Examples

>>> from colour import COLOURCHECKERS_SPDS
>>> spd = COLOURCHECKERS_SPDS['ColorChecker N Ohta']['dark skin']
>>> spectral_to_aces_relative_exposure_values(spd)  
array([ 0.1187697...,  0.0870866...,  0.0589442...])