colour.models.sUCS_Iab_to_sUCS_ICh

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

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

Parameters:

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

Returns:

sUCS \(ICh\) cylindrical coordinates array.

Return type:

numpy.ndarray

Notes

Domain	Scale - Reference	Scale - 1
Iab	100	1

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

References

[LL24]

Examples

>>> Iab = np.array([42.62923653, 36.97646831, 14.12301358])
>>> sUCS_Iab_to_sUCS_ICh(Iab)
array([ 42.6292365...,  40.4205110...,  20.9041560...])