colour.RLAB_Specification

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)

__init__()

x.__init__(…) initializes x; see help(type(x)) for signature

Methods

count(…)
index((value, [start, …) Raises ValueError if the value is not present.