colour.models.log_encoding_Panalog#

colour.models.log_encoding_Panalog(x: FloatingOrArrayLike, black_offset: FloatingOrArrayLike = 10 ** 64 - 681 / 444) FloatingOrNDArray[source]#

Define the Panalog log encoding curve / opto-electronic transfer function.

Parameters
  • x (FloatingOrArrayLike) – Linear data \(x\).

  • black_offset (FloatingOrArrayLike) – Black offset.

Returns

Non-linear data \(y\).

Return type

numpy.floating or numpy.ndarray

Warning

These are estimations known to be close enough, the actual log encoding curves are not published.

Notes

Domain

Scale - Reference

Scale - 1

x

[0, 1]

[0, 1]

Range

Scale - Reference

Scale - 1

y

[0, 1]

[0, 1]

References

[SonyImageworks12]

Examples

>>> log_encoding_Panalog(0.18)  
0.3745767...