colour_hdri.exposure_index_values#

colour_hdri.exposure_index_values(H_a: ArrayLike) → NDArrayFloat[source]#

Compute the exposure index values \(I_{EI}\) from given focal plane exposure \(H_a\).

Parameters:

H_a (ArrayLike) – Focal plane exposure \(H_a\).

Returns:

Exposure index values \(I_{EI}\).

Return type:

numpy.ndarray

References

[ISO06]

Examples

>>> exposure_index_values(0.1628937086212269)  
61.3897251...