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

__init__

Initialize self.

count(value)

index(value, [start, [stop]])

Raises ValueError if the value is not present.

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