colour.models.log_decoding_FLog

colour.models.log_decoding_FLog(out_r, bit_depth=10, in_normalised_code_value=True, out_reflection=True, constants={'a': 0.555556, 'b': 0.009468, 'c': 0.344676, 'cut1': 0.00089, 'cut2': 0.100537775223865, 'd': 0.790453, 'e': 8.735631, 'f': 0.092864})

Defines the Fujifilm F-Log log decoding curve / electro-optical transfer function.

Parameters

• out_r (numeric or array_like) – Non-linear data \(out\).

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

• in_normalised_code_value (bool, optional) – Whether the non-linear Fujifilm F-Log data \(out\) is encoded as normalised code values.

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

• constants (Structure, optional) – Fujifilm F-Log constants.

Returns

Linear reflection data :math`in`.

Return type

numeric or ndarray

Notes

Domain	Scale - Reference	Scale - 1
out_r	[0, 1]	[0, 1]

Range	Scale - Reference	Scale - 1
in_r	[0, 1]	[0, 1]

References

[Fuj16]

Examples

>>> log_decoding_FLog(0.45931845866162124)  
0.1800000...