colour.models.log_decoding_VLog

colour.models.log_decoding_VLog(V_out: ArrayLike, bit_depth: int = 10, in_normalised_code_value: bool = True, out_reflection: bool = True, constants: Structure = CONSTANTS_VLOG) → NDArrayFloat

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

Parameters:

• V_out (ArrayLike) – Non-linear data \(V_{out}\).

• bit_depth (int) – Bit-depth used for conversion.

• in_normalised_code_value (bool) – Whether the non-linear Panasonic V-Log data \(V_{out}\) is encoded as normalised code values.

• out_reflection (bool) – Whether the light level :math`L_{in}` to a camera is reflection.

• constants (Structure) – Panasonic V-Log constants.

Returns:

Linear reflection data :math`L_{in}`.

Return type:

numpy.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

[Panasonic14]

Examples

>>> log_decoding_VLog(0.423311448760136)  
0.1799999...