colour.models.log_encoding_ERIMMRGB

colour.models.log_encoding_ERIMMRGB(X, bit_depth=8, out_int=False, E_min=0.001, E_clip=316.2)[source]

Defines the ERIMM RGB log encoding curve / opto-electronic transfer function (OETF / OECF).

Parameters

  • X (numeric or array_like) – Linear data \(X_{ERIMM}\).

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

  • out_int (bool, optional) – Whether to return value as integer code value or float equivalent of a code value at a given bit depth.

  • E_min (numeric, optional) – Minimum exposure limit.

  • E_clip (numeric, optional) – Maximum exposure limit.

Returns

Non-linear data \(X'_{ERIMM}\).

Return type

numeric or ndarray

Notes

Domain *

Scale - Reference

Scale - 1

X

[0, 1]

[0, 1]

Range *

Scale - Reference

Scale - 1

X_p

[0, 1]

[0, 1]

* This definition has an output integer switch, thus the domain-range scale information is only given for the floating point mode.

References

[SWG00]

Examples

>>> log_encoding_ERIMMRGB(0.18)  
0.4100523...
>>> log_encoding_ERIMMRGB(0.18, out_int=True)
105