colour.models.log_decoding_SLog2#

colour.models.log_decoding_SLog2(y: ArrayLike, bit_depth: int = 10, in_normalised_code_value: bool = True, out_reflection: bool = True) → NDArrayFloat[source]#

Define the Sony S-Log2 log decoding curve / electro-optical transfer function.

Parameters:

y (ArrayLike) – Non-linear Sony S-Log2 data \(y\).
bit_depth (int) – Bit-depth used for conversion.
in_normalised_code_value (bool) – Whether the non-linear Sony S-Log2 data \(y\) is encoded as normalised code values.
out_reflection (bool) – Whether the light level \(x\) to a camera is reflection.

Returns:

Reflection or \(IRE / 100\) input light level \(x\) to a camera.

Return type:

numpy.ndarray

Notes

Domain	Scale - Reference	Scale - 1
`y`	[0, 1]	[0, 1]

Range	Scale - Reference	Scale - 1
`x`	[0, 1]	[0, 1]

References

[SonyCorporation12]

Examples

>>> log_decoding_SLog2(0.339532524633774)  
0.1...