colour.CAM_Specification_ATD95¶
- class colour.CAM_Specification_ATD95(h: Optional[FloatingOrNDArray] = <factory>, C: Optional[FloatingOrNDArray] = <factory>, Q: Optional[FloatingOrNDArray] = <factory>, A_1: Optional[FloatingOrNDArray] = <factory>, T_1: Optional[FloatingOrNDArray] = <factory>, D_1: Optional[FloatingOrNDArray] = <factory>, A_2: Optional[FloatingOrNDArray] = <factory>, T_2: Optional[FloatingOrNDArray] = <factory>, D_2: Optional[FloatingOrNDArray] = <factory>)[source]¶
Define the ATD (1995) colour vision model specification.
This specification has field names consistent with the remaining colour appearance models in
colour.appearance
but diverge from Fairchild (2013) reference.- Parameters
h (Optional[FloatingOrNDArray]) – Hue angle \(H\) in degrees.
C (Optional[FloatingOrNDArray]) – Correlate of saturation \(C\). Guth (1995) incorrectly uses the terms saturation and chroma interchangeably. However, \(C\) is here a measure of saturation rather than chroma since it is measured relative to the achromatic response for the stimulus rather than that of a similarly illuminated white.
Q (Optional[FloatingOrNDArray]) – Correlate of brightness \(Br\).
A_1 (Optional[FloatingOrNDArray]) – First stage \(A_1\) response.
T_1 (Optional[FloatingOrNDArray]) – First stage \(T_1\) response.
D_1 (Optional[FloatingOrNDArray]) – First stage \(D_1\) response.
A_2 (Optional[FloatingOrNDArray]) – Second stage \(A_2\) response.
T_2 (Optional[FloatingOrNDArray]) – Second stage \(A_2\) response.
D_2 (Optional[FloatingOrNDArray]) – Second stage \(D_2\) response.
- Return type
None
Notes
This specification is the one used in the current model implementation.
References
- __init__(h: Optional[FloatingOrNDArray] = <factory>, C: Optional[FloatingOrNDArray] = <factory>, Q: Optional[FloatingOrNDArray] = <factory>, A_1: Optional[FloatingOrNDArray] = <factory>, T_1: Optional[FloatingOrNDArray] = <factory>, D_1: Optional[FloatingOrNDArray] = <factory>, A_2: Optional[FloatingOrNDArray] = <factory>, T_2: Optional[FloatingOrNDArray] = <factory>, D_2: Optional[FloatingOrNDArray] = <factory>) None ¶
- Parameters
h (Optional[FloatingOrNDArray]) –
C (Optional[FloatingOrNDArray]) –
Q (Optional[FloatingOrNDArray]) –
A_1 (Optional[FloatingOrNDArray]) –
T_1 (Optional[FloatingOrNDArray]) –
D_1 (Optional[FloatingOrNDArray]) –
A_2 (Optional[FloatingOrNDArray]) –
T_2 (Optional[FloatingOrNDArray]) –
D_2 (Optional[FloatingOrNDArray]) –
- Return type
None
Methods
__init__
([h, C, Q, A_1, T_1, D_1, A_2, T_2, D_2])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.h
C
Q
A_1
T_1
D_1
A_2
T_2
D_2