colour.colour_rendering_index#

colour.colour_rendering_index(sd_test: SpectralDistribution, additional_data: bool = False) Union[float, ColourRendering_Specification_CRI][source]#

Return the Colour Rendering Index (CRI) \(Q_a\) of given spectral distribution.

Parameters:
  • sd_test (SpectralDistribution) – Test spectral distribution.

  • additional_data (bool) – Whether to output additional data.

Returns:

Colour Rendering Index (CRI).

Return type:

numpy.floating or colour.quality.ColourRendering_Specification_CRI

References

[OD08]

Examples

>>> from colour import SDS_ILLUMINANTS
>>> sd = SDS_ILLUMINANTS["FL2"]
>>> colour_rendering_index(sd)  
64.2337241...