# colour.models.eotf_inverse_DCDM¶

colour.models.eotf_inverse_DCDM(XYZ, out_int=False)[source]

Defines the DCDM inverse electro-optical transfer function (EOTF / EOCF).

Parameters: XYZ (numeric or array_like) – CIE XYZ tristimulus values. out_int (bool, optional) – Whether to return value as integer code value or float equivalent of a code value at a given bit depth. Non-linear CIE XYZ’ tristimulus values. numeric or ndarray

Warning

DCDM is an absolute transfer function.

Notes

• DCDM is an absolute transfer function, thus the domain and range values for the Reference and 1 scales are only indicative that the data is not affected by scale transformations.
Domain * Scale - Reference Scale - 1
XYZ [0, 1] [0, 1]
Range * Scale - Reference Scale - 1
XYZ_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

[DigitalCinemaInitiatives2007b]

Examples

>>> eotf_inverse_DCDM(0.18)  # doctest: +ELLIPSIS
0.1128186...
>>> eotf_inverse_DCDM(0.18, out_int=True)
462