colour.LLAB_Specification

class colour.LLAB_Specification[source]

Defines the :math:`LLAB(l:c)` 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 \(L_L\).

  • C (numeric or array_like) – Correlate of chroma \(Ch_L\).

  • h (numeric or array_like) – Hue angle \(h_L\) in degrees.

  • s (numeric or array_like) – Correlate of saturation \(s_L\).

  • M (numeric or array_like) – Correlate of colourfulness \(C_L\).

  • HC (numeric or array_like) – Hue \(h\) composition \(H^C\).

  • a (numeric or array_like) – Opponent signal \(A_L\).

  • b (numeric or array_like) – Opponent signal \(B_L\).

Notes

  • This specification is the one used in the current model implementation.

References

[Fai13e], [LLK96], [LM96]

Create new instance of LLAB_Specification(J, C, h, s, M, 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 5

J

Alias for field number 0

M

Alias for field number 4

a

Alias for field number 6

b

Alias for field number 7

h

Alias for field number 2

s

Alias for field number 3