colour.colour_rendering_index

colour.colour_rendering_index(sd_test, additional_data=False)[source]

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

Parameters
  • sd_test (SpectralDistribution) – Test spectral distribution.

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

Returns

Colour Rendering Index (CRI).

Return type

numeric or ColourRendering_Specification_CRI

References

[OD08]

Examples

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