colour.cctf_encoding#

colour.cctf_encoding(value: ArrayLike, function: LiteralCCTFEncoding | str = 'sRGB', **kwargs: Any) → NDArrayFloat | NDArrayInt[source]#

Encode linear \(RGB\) values to non-linear \(R'G'B'\) values using given encoding colour component transfer function (Encoding CCTF).

Parameters:

value (ArrayLike) – Linear \(RGB\) values.
function (LiteralCCTFEncoding | str) – {colour.CCTF_ENCODINGS}, Encoding colour component transfer function.
kwargs (Any) – Keywords arguments for the relevant encoding CCTF of the colour.CCTF_ENCODINGS attribute collection.

Return type:

NDArrayFloat | NDArrayInt

Warning

For ITU-R BT.2100, only the inverse electro-optical transfer functions (EOTFs / EOCFs) are exposed by this definition, See the colour.oetf() definition for the opto-electronic transfer functions (OETF).

Returns:

Non-linear \(R'G'B'\) values.

Return type:

numpy.ndarray

Parameters:

value (ArrayLike)
function (LiteralCCTFEncoding | str)
kwargs (Any)

Examples

>>> cctf_encoding(0.18, function="PLog", log_reference=400)
... 
0.3910068...
>>> cctf_encoding(0.18, function="ST 2084", L_p=1000)
... 
0.1820115...
>>> cctf_encoding(  
...     0.11699185725296059, function="ITU-R BT.1886"
... )
0.4090077...