colour.ootf_inverse¶

colour.ootf_inverse(value, function='ITU-R BT.2100 PQ', **kwargs)[source]¶

Maps relative display linear light to scene linear light using given inverse opto-optical transfer function (OOTF / OOCF).

Other Parameters:
Parameters:	value (numeric or array_like) – Value. function (unicode, optional) – {‘ITU-R BT.2100 HLG’, ‘ITU-R BT.2100 PQ’} Inverse opto-optical transfer function (OOTF / OOCF).
	L_B (numeric, optional) – {`colour.models.ootf_inverse_HLG_BT2100()`}, \(L_B\) is the display luminance for black in \(cd/m^2\). L_W (numeric, optional) – {`colour.models.ootf_inverse_HLG_BT2100()`}, \(L_W\) is nominal peak luminance of the display in \(cd/m^2\) for achromatic pixels. gamma (numeric, optional) – {`colour.models.ootf_inverse_HLG_BT2100()`}, System gamma value, 1.2 at the nominal display peak luminance of \(1000 cd/m^2\).
Returns:	Luminance of scene linear light.
Return type:	numeric or ndarray

Examples

>>> ootf_inverse(779.988360834115840)  # doctest: +ELLIPSIS
0.1000000...
>>> ootf_inverse(  # doctest: +ELLIPSIS
...     63.095734448019336, function='ITU-R BT.2100 HLG')
0.1000000...