colour.models.log_encoding_ERIMMRGB#

colour.models.log_encoding_ERIMMRGB(X: Annotated[_Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str], 1], bit_depth: int = 8, out_int: bool = False, E_min: float = 0.001, E_clip: float = 316.2) → Annotated[TypeAliasForwardRef('NDArrayReal'), 1][source]#

Apply the ERIMM RGB log encoding opto-electronic transfer function (OETF).

Parameters:

  • X (Annotated[_Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str], 1]) – Linear data \(X_{ERIMM}\).

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

  • out_int (bool) – Whether to return value as integer code value or floating point equivalent of a code value at a specified bit-depth.

  • E_min (float) – Minimum exposure limit.

  • E_clip (float) – Maximum exposure limit.

Returns:

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

Return type:

numpy.ndarray

Notes

Domain

Scale - Reference

Scale - 1

X

1

1

Range

Scale - Reference

Scale - 1

X_p

1

1

  • This definition has an output int switch, thus the domain-range scale information is only specified for the floating point mode.

References

[SWG00]

Examples

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