colour.CAM_Specification_Nayatani95#

Define 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 (float | NDArrayFloat | None) – Correlate of achromatic Lightness \(L_p^\star\).
C (float | NDArrayFloat | None) – Correlate of chroma \(C\).
h (float | NDArrayFloat | None) – Hue angle \(\theta\) in degrees.
s (float | NDArrayFloat | None) – Correlate of saturation \(S\).
Q (float | NDArrayFloat | None) – Correlate of brightness \(B_r\).
M (float | NDArrayFloat | None) – Correlate of colourfulness \(M\).
H (float | NDArrayFloat | None) – Hue \(h\) quadrature \(H\).
HC (float | NDArrayFloat | None) – Hue \(h\) composition \(H_C\).
L_star_N (float | NDArrayFloat | None) – Correlate of normalised achromatic Lightness \(L_n^\star\).

Notes

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

References

[Fai13c], [NSY95]

Parameters:

L_star_P (float | NDArrayFloat | None)
C (float | NDArrayFloat | None)
h (float | NDArrayFloat | None)
s (float | NDArrayFloat | None)
Q (float | NDArrayFloat | None)
M (float | NDArrayFloat | None)
H (float | NDArrayFloat | None)
HC (float | NDArrayFloat | None)
L_star_N (float | NDArrayFloat | None)

Return type:

None

Methods

`__init__`([L_star_P, C, h, s, Q, M, H, HC, ...])
`arithmetical_operation`(a, operation[, in_place])	Perform given arithmetical operation with \(a\) operand on the `dataclass`-like class.

Attributes

`fields`	Getter property for the fields of the `dataclass`-like class.
`items`	Getter property for the `dataclass`-like class items, i.e., the field names and values.
`keys`	Getter property for the `dataclass`-like class keys, i.e., the field names.
`values`	Getter property for the `dataclass`-like class values, i.e., the field values.
`L_star_P`
`C`
`h`
`s`
`Q`
`M`
`H`
`HC`
`L_star_N`