colour.models.log_decoding_SLog2

colour.models.log_decoding_SLog2(y, bit_depth=10, in_legal=True, out_reflection=True)[source]

Defines the Sony S-Log2 log decoding curve / electro-optical transfer function.

Parameters:
  • y (numeric or array_like) – Non-linear Sony S-Log2 data \(y\).
  • bit_depth (int, optional) – Bit depth used for conversion.
  • in_legal (bool, optional) – Whether the non-linear Sony S-Log2 data \(y\) is encoded in legal range.
  • out_reflection (bool, optional) – Whether the light level \(x\) to a camera is reflection.
Returns:

Reflection or \(IRE / 100\) input light level \(x\) to a camera.
Return type:

numeric or ndarray

Notes

Domain Scale - Reference Scale - 1
y [0, 1] [0, 1]
Range Scale - Reference Scale - 1
x [0, 1] [0, 1]

References

[SonyCorporation12]

Examples

>>> log_decoding_SLog2(0.339532524633774)  # doctest: +ELLIPSIS
0.1...
>>> log_decoding_SLog2(0.323449512215013, in_legal=False)
... # doctest: +ELLIPSIS
0.1...
>>> log_decoding_SLog2(0.326286538946799, out_reflection=False)
... # doctest: +ELLIPSIS
0.1...