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).
- 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) 0.1000000... >>> ootf_inverse( ... 63.095734448019336, function='ITU-R BT.2100 HLG') 0.1000000...