colour.models.log_decoding_VLog¶

colour.models.log_decoding_VLog(V_out, bit_depth=10, in_legal=True, out_reflection=True, constants={'b': 0.00873, 'c': 0.241514, 'cut1': 0.01, 'cut2': 0.181, 'd': 0.598206})[source]¶

Defines the Panasonic V-Log log decoding curve / electro-optical transfer function.

Parameters:	V_out (numeric or array_like) – Non-linear data \(V_{out}\). bit_depth (int, optional) – Bit depth used for conversion. in_legal (bool, optional) – Whether the non-linear Panasonic V-Log data \(V_{out}\) is encoded in legal range. out_reflection (bool, optional) – Whether the light level :math`L_{in}` to a camera is reflection. constants (Structure, optional) – Panasonic V-Log constants.
Returns:	Linear reflection data :math`L_{in}`.
Return type:	numeric or ndarray

Notes

Domain	Scale - Reference	Scale - 1
`V_out`	[0, 1]	[0, 1]

Range	Scale - Reference	Scale - 1
`L_in`	[0, 1]	[0, 1]

References

[Pan14]

Examples

>>> log_decoding_VLog(0.423311448760136)  # doctest: +ELLIPSIS
0.1799999...