colour.Nayatani95_Specification¶

class colour.Nayatani95_Specification[source]¶

Defines the Nayatani (1995) 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:

L_star_P (numeric or array_like) – Correlate of achromatic Lightness \(L_p^\star\).
C (numeric or array_like) – Correlate of chroma \(C\).
h (numeric or array_like) – Hue angle \(\theta\) in degrees.
s (numeric or array_like) – Correlate of saturation \(S\).
Q (numeric or array_like) – Correlate of brightness \(B_r\).
M (numeric or array_like) – Correlate of colourfulness \(M\).
H (numeric or array_like) – Hue \(h\) quadrature \(H\).
HC (numeric or array_like) – Hue \(h\) composition \(H_C\).
L_star_N (numeric or array_like) – Correlate of normalised achromatic Lightness \(L_n^\star\).

Notes

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

References

[Fai13g], [NSY95]

Create new instance of Nayatani95_Specification(L_star_P, C, h, s, Q, M, H, HC, L_star_N)

__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
`H`	Alias for field number 6
`HC`	Alias for field number 7
`L_star_N`	Alias for field number 8
`L_star_P`	Alias for field number 0
`M`	Alias for field number 5
`Q`	Alias for field number 4
`h`	Alias for field number 2
`s`	Alias for field number 3