colour.models.log_decoding_Log2¶
- colour.models.log_decoding_Log2(log_norm, middle_grey=0.18, min_exposure=- 6.5, max_exposure=6.5)[source]¶
Defines the common Log2 decoding function.
- Parameters
log_norm (numeric or array_like) – Logarithmic data to undergo decoding.
middle_grey (numeric, optional) – Middle Grey exposure value.
min_exposure (numeric, optional) – Minimum exposure level.
max_exposure (numeric, optional) – Maximum exposure level.
- Returns
Linear Log2 decoded data.
- Return type
numeric or ndarray
Notes
The common Log2 decoding function can be used to build logarithmic to linear shapers in the ACES OCIO configuration.
The shaper with logarithmic encoded values can be decoded back to linear domain:
Shaper Range
Shaper Domain
[0, 1]
[0.002, 16.291]
References
[]
Examples
>>> log_decoding_Log2(0.5) 0.1799999...