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

`count`	Return number of occurrences of value.
`index`	Return first index of value.

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