colour.log_decoding

colour.log_decoding(value, function='Cineon', **kwargs)[source]

Decodes \(R'G'B'\) video component signal value to linear-light values using given log function.

Parameters
  • value (numeric or array_like) – Value.

  • function (unicode, optional) – {‘ACEScc’, ‘ACEScct’, ‘ACESproxy’, ‘ALEXA Log C’, ‘Canon Log 2’, ‘Canon Log 3’, ‘Canon Log’, ‘Cineon’, ‘D-Log’, ‘ERIMM RGB’, ‘F-Log’, ‘Filmic Pro 6’, ‘Log2’, ‘Log3G10’, ‘Log3G12’, ‘Panalog’, ‘PLog’, ‘Protune’, ‘REDLog’, ‘REDLogFilm’, ‘S-Log’, ‘S-Log2’, ‘S-Log3’, ‘T-Log’, ‘V-Log’, ‘ViperLog’}, Computation function.

Other Parameters
Returns

Log value.

Return type

numeric or ndarray

Examples

>>> log_decoding(0.457319613085418)  
0.1...
>>> log_decoding(0.413588402492442, function='ACEScc')
... 
0.1...
>>> log_decoding(0.391006842619746, function='PLog', log_reference=400)
... 
0.1...
>>> log_decoding(0.376512722254600, function='S-Log')
... 
0.1...