colour.RLAB_Specification¶
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class
colour.
RLAB_Specification
[source]¶ Defines the RLAB colour appearance model specification.
This specification has field names consistent with the remaining colour appearance models in
colour.appearance
but diverge from Fairchild (2013) reference.Parameters: - J (numeric or array_like) – Correlate of Lightness \(L^R\).
- C (numeric or array_like) – Correlate of achromatic chroma \(C^R\).
- h (numeric or array_like) – Hue angle \(h^R\) in degrees.
- s (numeric or array_like) – Correlate of saturation \(s^R\).
- HC (numeric or array_like) – Hue \(h\) composition \(H^C\).
- a (numeric or array_like) – Red-green chromatic response \(a^R\).
- b (numeric or array_like) – Yellow-blue chromatic response \(b^R\).
Notes
- This specification is the one used in the current model implementation.
References
Create new instance of RLAB_Specification(J, C, h, s, HC, a, b)
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__init__
()¶ x.__init__(…) initializes x; see help(type(x)) for signature
Methods
count
(…)index
((value, [start, …)Raises ValueError if the value is not present.