colour.sd_multi_leds¶

colour.sd_multi_leds(peak_wavelengths: ArrayLike, fwhm: ArrayLike, peak_power_ratios: Optional[ArrayLike] = None, shape: SpectralShape = SPECTRAL_SHAPE_DEFAULT, method: Union[Literal['Ohno 2005'], str] = 'Ohno 2005', **kwargs: Any) → SpectralDistribution[source]¶

Return a multi LED spectral distribution of given spectral shape at given peak wavelengths and full widths at half maximum according to given method.

Parameters

peak_wavelengths (ArrayLike) – Wavelengths the multi LED spectral distribution will peak at, i.e. the peaks for each generated single LED spectral distributions.
fwhm (ArrayLike) – Full widths at half maximum, i.e. widths of the underlying gaussian spectral distributions measured between those points on the y axis which are half the maximum amplitude.
peak_power_ratios (Optional[ArrayLike]) – Peak power ratios for each generated single LED spectral distributions.
shape (SpectralShape) – Spectral shape used to create the spectral distribution.
method (Union[Literal['Ohno 2005'], str]) – Computation method.
kwargs (Any) – {colour.colorimetry.sd_multi_leds_Ohno2005()}, See the documentation of the previously listed definition.

Returns

Multi LED spectral distribution.

Return type

colour.SpectralDistribution

Notes

By default, the spectral distribution will use the shape given by colour.SPECTRAL_SHAPE_DEFAULT attribute.

References

[Ohn05], [OD08]

Examples

>>> sd = sd_multi_leds(
...     np.array([457, 530, 615]),
...     np.array([20, 30, 20]),
...     np.array([0.731, 1.000, 1.660]),
... )
>>> sd.shape
SpectralShape(360.0, 780.0, 1.0)
>>> sd[500]  
0.1295132...

colour.SD_MULTI_LEDS_METHODS

colour.colorimetry.blackbody_spectral_radiance