colour.models.oetf_inverse_H273_LogSqrt#

colour.models.oetf_inverse_H273_LogSqrt(V)[source]#

Define Recommendation ITU-T H.273 inverse-opto-electronic transfer function (OETF) for logarithmic encoding (100*Sqrt(10):1 range).

Parameters:

V – Electrical signal \(V\).

Returns:

Corresponding scene Luminance \(L_c\).

Return type:

numpy.ndarray

Notes

Range

Scale - Reference

Scale - 1

V

[0, 1]

[0, 1]

Domain

Scale - Reference

Scale - 1

L_c

[0, 1]

[0, 1]

References

[InternationalTUnion21]

Warning

  • The function is clamped to domain [sqrt(10) / 1000, np.inf].

Examples

>>> oetf_inverse_H273_LogSqrt(0.702109002041)  
0.1799999999...
>>> oetf_inverse_H273_LogSqrt(0.0)  
0.00316227766...
>>> oetf_inverse_H273_LogSqrt(1.0)  
1.0