Defines luminous efficiency functions computation related objects.
See also
Luminous Efficiency Functions IPython Notebook colour.colorimetry.dataset.lefs, colour.colorimetry.spectrum.SpectralPowerDistribution
References
[1] | http://en.wikipedia.org/wiki/Mesopic#Mesopic_weighting_function (Last accessed 20 June 2014) |
Calculates the mesopic weighting function factor at given wavelength λ using the photopic luminance Lp.
Parameters: |
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Returns: | Mesopic weighting function factor. |
Return type: | numeric |
Raises: | KeyError – If wavelength λ is not available in either luminous efficiency function. |
Examples
>>> mesopic_weighting_function(500, 0.2)
0.7052200...
Returns the mesopic luminous efficiency function Vm(λ) for given photopic luminance Lp.
Parameters: |
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Returns: | Mesopic luminous efficiency function Vm(λ). |
Return type: | SpectralPowerDistribution |
Examples
>>> mesopic_luminous_efficiency_function(0.2)
<colour.colorimetry.spectrum.SpectralPowerDistribution object at 0x...>