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

[Fai96], [Fai13h]

Create new instance of RLAB_Specification(J, C, h, s, HC, a, b)

__init__()

Initialize self. See help(type(self)) for accurate signature.

Methods

__init__

Initialize self.

count(value)

index(value, [start, [stop]])

Raises ValueError if the value is not present.

Attributes

C

Alias for field number 1

HC

Alias for field number 4

J

Alias for field number 0

a

Alias for field number 5

b

Alias for field number 6

h

Alias for field number 2

s

Alias for field number 3