colour.models.cctf_decoding_ProPhotoRGB

colour.models.cctf_decoding_ProPhotoRGB(X_p: Annotated[_Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str], 1], bit_depth: int = 8, in_int: bool = False) → Annotated[ndarray[tuple[Any, ...], dtype[float16 | float32 | float64]], 1]

Apply the ProPhoto RGB decoding colour component transfer function (Decoding CCTF).

Parameters:

• X_p (Annotated[_Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str], 1]) – Non-linear encoded data \(X'_{ROMM}\).

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

• in_int (bool) – Whether to treat the input value as integer code value or floating point equivalent of a code value at a specified bit-depth.

Returns:

Linear data \(X_{ROMM}\).

Return type:

numpy.ndarray

Notes

Domain	Scale - Reference	Scale - 1
X_p	1	1

Range	Scale - Reference	Scale - 1
X	1	1

• This definition has an input int switch, thus the domain-range scale information is only specified for the floating point mode.

References

[ANSI03], [SWG00]

Examples

>>> cctf_decoding_ROMMRGB(0.385711424751138)
0.1...
>>> cctf_decoding_ROMMRGB(98, in_int=True)
0.1...