colour.spectral_similarity_index¶

colour.spectral_similarity_index(sd_test: colour.colorimetry.spectrum.SpectralDistribution, sd_reference: colour.colorimetry.spectrum.SpectralDistribution) → numpy.ndarray[source]¶

Return the Academy Spectral Similarity Index (SSI) of given test spectral distribution with given reference spectral distribution.

Parameters

sd_test (colour.colorimetry.spectrum.SpectralDistribution) – Test spectral distribution.
sd_reference (colour.colorimetry.spectrum.SpectralDistribution) – Reference spectral distribution.

Returns

Academy Spectral Similarity Index (SSI).

Return type

numpy.ndarray

References

[TheAoMPAaSciences19]

Examples

>>> from colour import SDS_ILLUMINANTS
>>> sd_test = SDS_ILLUMINANTS['C']
>>> sd_reference = SDS_ILLUMINANTS['D65']
>>> spectral_similarity_index(sd_test, sd_reference)
94.0

colour.quality.ColourRendering_Specification_CQS

Reflectance Recovery