colour.CAM_Specification_Hellwig2022#

class colour.CAM_Specification_Hellwig2022(J: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, C: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, h: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, s: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, Q: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, M: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, H: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, HC: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, J_HK: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, Q_HK: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>)[source]#

Define the Hellwig and Fairchild (2022) colour appearance model specification.

This specification supports the Helmholtz-Kohlrausch effect extension from [HSF22].

Parameters:

J (Optional[Union[float, NDArrayFloat]]) – Correlate of Lightness \(J\).
C (Optional[Union[float, NDArrayFloat]]) – Correlate of chroma \(C\).
h (Optional[Union[float, NDArrayFloat]]) – Hue angle \(h\) in degrees.
s (Optional[Union[float, NDArrayFloat]]) – Correlate of saturation \(s\).
Q (Optional[Union[float, NDArrayFloat]]) – Correlate of brightness \(Q\).
M (Optional[Union[float, NDArrayFloat]]) – Correlate of colourfulness \(M\).
H (Optional[Union[float, NDArrayFloat]]) – Hue \(h\) quadrature \(H\).
HC (Optional[Union[float, NDArrayFloat]]) – Hue \(h\) composition \(H^C\).
J_HK (Optional[Union[float, NDArrayFloat]]) – Correlate of Lightness \(J_{HK}\) accounting for Helmholtz-Kohlrausch effect.
Q_HK (Optional[Union[float, NDArrayFloat]]) – Correlate of brightness \(Q_{HK}\) accounting for Helmholtz-Kohlrausch effect.

References

[FH22], [HF22], [HSF22]

__init__(J: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, C: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, h: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, s: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, Q: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, M: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, H: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, HC: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, J_HK: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>, Q_HK: ~typing.Optional[~typing.Union[float, NDArrayFloat]] = <factory>) → None#

Parameters:

J (Optional[Union[float, NDArrayFloat]]) –
C (Optional[Union[float, NDArrayFloat]]) –
h (Optional[Union[float, NDArrayFloat]]) –
s (Optional[Union[float, NDArrayFloat]]) –
Q (Optional[Union[float, NDArrayFloat]]) –
M (Optional[Union[float, NDArrayFloat]]) –
H (Optional[Union[float, NDArrayFloat]]) –
HC (Optional[Union[float, NDArrayFloat]]) –
J_HK (Optional[Union[float, NDArrayFloat]]) –
Q_HK (Optional[Union[float, NDArrayFloat]]) –

Return type:

None

Methods

`__init__`([J, C, h, s, Q, M, H, HC, J_HK, Q_HK])
`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.
`J`
`C`
`h`
`s`
`Q`
`M`
`H`
`HC`
`J_HK`
`Q_HK`