colour.models.log_encoding_PivotedLog¶
-
colour.models.
log_encoding_PivotedLog
(x, log_reference=445, linear_reference=0.18, negative_gamma=0.6, density_per_code_value=0.002)[source]¶ Defines the Josh Pines style Pivoted Log log encoding curve / opto-electronic transfer function.
- Parameters
x (numeric or array_like) – Linear data \(x\).
log_reference (numeric or array_like) – Log reference.
linear_reference (numeric or array_like) – Linear reference.
negative_gamma (numeric or array_like) – Negative gamma.
density_per_code_value (numeric or array_like) – Density per code value.
- Returns
Non-linear data \(y\).
- Return type
numeric or ndarray
Notes
Domain
Scale - Reference
Scale - 1
x
[0, 1]
[0, 1]
Range
Scale - Reference
Scale - 1
y
[0, 1]
[0, 1]
References
Examples
>>> log_encoding_PivotedLog(0.18) 0.4349951...