colour.appearance.coefficient_K_Br_Nayatani1997#

colour.appearance.coefficient_K_Br_Nayatani1997(L_a: FloatingOrArrayLike) → FloatingOrNDArray[source]#

Return the \(K_{Br}\) coefficient for Nayatani (1997) HKE computations.

Parameters: L_a (FloatingOrArrayLike) – Adapting luminance in \(cd/m^2\).
Returns: \(K_{Br}\) coefficient for Nayatani (1997) HKE methods.
Return type: numpy.floating or numpy.ndarray

Notes

The \(K_{Br}\) coefficient is normalised to unity around \(63.66cd/m^2\).

References

Examples

>>> L_a_values = [10 + i * 20 for i in range(5)]
>>> coefficient_K_Br_Nayatani1997(L_a_values)  
array([ 0.7134481...,  0.8781172...,  0.9606248...,  1.0156689...,  1.0567008...])
>>> coefficient_K_Br_Nayatani1997(63.66)  
1.0001284...

colour.appearance.coefficient_q_Nayatani1997

Biochemistry