colour.quality.cri Module¶
Colour Rendering Index¶
Defines Colour Rendering Index (CRI) computation objects:
References
[1] | Ohno, Y., & Davis, W. (2008). NIST CQS simulation 7.4. Retrieved from http://cie2.nist.gov/TC1-69/NIST CQS simulation 7.4.xls |
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class
colour.quality.cri.
TCS_ColorimetryData
[source]¶ Bases:
colour.quality.cri.TCS_ColorimetryData
Defines the the class storing test colour samples colorimetry data.
Create new instance of TCS_ColorimetryData(name, XYZ, uv, UVW)
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class
colour.quality.cri.
TCS_ColourQualityScaleData
[source]¶ Bases:
colour.quality.cri.TCS_ColourQualityScaleData
Defines the the class storing test colour samples colour rendering index data.
Create new instance of TCS_ColourQualityScaleData(name, Q_a)
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class
colour.quality.cri.
CRI_Specification
[source]¶ Bases:
colour.quality.cri.CRI_Specification
Defines the Colour Rendering Index (CRI) colour quality specification.
Parameters: Create new instance of CRI_Specification(name, Q_a, Q_as, colorimetry_data)
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colour.quality.cri.
colour_rendering_index
(spd_test, additional_data=False)[source]¶ Returns the Colour Rendering Index (CRI) \(Q_a\) of given spectral power distribution.
Parameters: - spd_test (SpectralPowerDistribution) – Test spectral power distribution.
- additional_data (bool, optional) – Output additional data.
Returns: Colour Rendering Index (CRI).
Return type: numeric or CRI_Specification
Examples
>>> from colour import ILLUMINANTS_RELATIVE_SPDS >>> spd = ILLUMINANTS_RELATIVE_SPDS['F2'] >>> colour_rendering_index(spd) 64.1515202...
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colour.quality.cri.
tcs_colorimetry_data
(spd_t, spd_r, spds_tcs, cmfs, chromatic_adaptation=False)[source]¶ Returns the test colour samples colorimetry data.
Parameters: - spd_t (SpectralPowerDistribution) – Test spectral power distribution.
- spd_r (SpectralPowerDistribution) – Reference spectral power distribution.
- spds_tcs (dict) – Test colour samples spectral power distributions.
- cmfs (XYZ_ColourMatchingFunctions) – Standard observer colour matching functions.
- chromatic_adaptation (bool, optional) – Perform chromatic adaptation.
Returns: Test colour samples colorimetry data.
Return type: