colour.models.spectral_to_aces_relative_exposure_values

colour.models.spectral_to_aces_relative_exposure_values(spd, illuminant=SpectralPowerDistribution(name='D60', ...))

Converts given spectral power distribution to ACES2065-1 colourspace relative exposure values.

Parameters:

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

Returns:

ACES2065-1 colourspace relative exposure values array.

Return type:

ndarray, (3,)

Notes

• Output ACES2065-1 colourspace relative exposure values array is in range [0, 1].

References

• [TheAoMPAaSciencesScienceaTCouncilAcademyCESACESPSubcommittee14c]
• [TheAoMPAaSciencesScienceaTCouncilAcademyCESACESPSubcommittee14d]
• [TheAoMPAaSciencesScienceaTCouncilAcademyCESACESPSubcommittee]

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...])