colour.models.sUCS_ICh_to_sUCS_Iab

colour.models.sUCS_ICh_to_sUCS_Iab(ICh: Annotated[_Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str], 100, 100, 360]) → Annotated[ndarray[tuple[Any, ...], dtype[float16 | float32 | float64]], 100]

Convert from sUCS \(ICh\) cylindrical coordinates to sUCS \(Iab\) rectangular coordinates.

Parameters:

ICh (Annotated[_Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str], (100, 100, 360)]) – sUCS \(ICh\) cylindrical coordinates array.

Returns:

sUCS \(Iab\) rectangular coordinates array.

Return type:

numpy.ndarray

Notes

Domain	Scale - Reference	Scale - 1
ICh	I : 100 C : 100 h : 360	I : 1 C : 1 h : 1

Range	Scale - Reference	Scale - 1
Iab	100	1

References

[LL24]

Examples

>>> ICh = np.array([42.62923653, 40.42051103, 20.90415604])
>>> sUCS_ICh_to_sUCS_Iab(ICh)
array([ 42.6292365...,  36.9764682...,  14.1230135...])