colour.quality.cri Module

Colour Rendering Index

Defines colour rendering index computation objects:

See also

Colour Rendering Index IPython Notebook

References

[1]http://cie2.nist.gov/TC1-69/NIST%20CQS%20simulation%207.4.xls (Last accessed 10 June 2014)
colour.quality.cri.TSC_COLORIMETRY_DATA_NXYZUVUVW

alias of TscColorimetryData_nXYZuvUVW

colour.quality.cri.colour_rendering_index(test_spd, additional_data=False)[source]

Returns the colour rendering index of given spectral power distribution.

Parameters:
  • test_spd (SpectralPowerDistribution) – Test spectral power distribution.
  • additional_data (bool, optional) – Output additional data.
Returns:

Colour rendering index, Tsc data.
Return type:

numeric or (numeric, dict)

Examples

>>> from colour import ILLUMINANTS_RELATIVE_SPDS
>>> spd = ILLUMINANTS_RELATIVE_SPDS.get('F2')
>>> colour_rendering_index(spd)  
64.1507331...