colour.models.log_encoding_PivotedLog¶
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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) # doctest: +ELLIPSIS 0.4349951...