colour.models.cctf_decoding_ProPhotoRGB

colour.models.cctf_decoding_ProPhotoRGB(X_p, bit_depth=8, in_int=False)

Defines the ProPhoto RGB decoding colour component transfer function (Encoding CCTF).

Parameters
  • X_p (numeric or array_like) – Non-linear data \(X'_{ROMM}\).

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

  • in_int (bool, optional) – Whether to treat the input value as integer code value or float equivalent of a code value at a given bit depth.

Returns

Linear data \(X_{ROMM}\).

Return type

numeric or ndarray

Notes

Domain *

Scale - Reference

Scale - 1

X_p

[0, 1]

[0, 1]

Range *

Scale - Reference

Scale - 1

X

[0, 1]

[0, 1]

* This definition has an input integer switch, thus the domain-range scale information is only given 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...