colour.models.cctf_encoding_ProPhotoRGB

colour.models.cctf_encoding_ProPhotoRGB(X: Annotated[_Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str], 1], bit_depth: int = 8, out_int: bool = False) → Annotated[TypeAliasForwardRef('NDArrayReal'), 1]

Apply the ProPhoto RGB encoding colour component transfer function (Encoding CCTF).

Parameters:

• X (Annotated[_Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str], 1]) – Linear data \(X_{ROMM}\).

• bit_depth (int) – Bit-depth used for conversion.

• out_int (bool) – Whether to return value as integer code value or floating point equivalent of a code value at a specified bit-depth.

Returns:

Non-linear encoded data \(X'_{ROMM}\).

Return type:

numpy.ndarray

Notes

Domain	Scale - Reference	Scale - 1
X	1	1

Range	Scale - Reference	Scale - 1
X_p	1	1

• This definition has an output int switch, thus the domain-range

scale information is only specified for the floating point mode.

References

[ANSI03], [SWG00]

Examples

>>> cctf_encoding_ROMMRGB(0.18)
0.3857114...
>>> cctf_encoding_ROMMRGB(0.18, out_int=True)
98