colour.colorimetry.sd_multi_leds_Ohno2005#

colour.colorimetry.sd_multi_leds_Ohno2005(peak_wavelengths: ArrayLike, half_spectral_widths: ArrayLike, peak_power_ratios: ArrayLike | None = None, shape: SpectralShape = SPECTRAL_SHAPE_DEFAULT, **kwargs: Any) → SpectralDistribution[source]#

Return a multi LED spectral distribution of given spectral shape at given peak wavelengths, half spectral widths \(\Delta\lambda_{0.5}\) and peak power ratios according to Ohno (2005) method.

The multi LED spectral distribution is generated using many single LED spectral distributions generated with colour.sd_single_led_Ohno2005() definition.

Parameters:

  • peak_wavelengths (ArrayLike) – Wavelengths the multi LED spectral distribution will peak at, i.e. the peaks for each generated single LED spectral distributions.

  • half_spectral_widths (ArrayLike) – Half spectral widths \(\Delta\lambda_{0.5}\).

  • peak_power_ratios (ArrayLike | None) – Peak power ratios for each generated single LED spectral distributions.

  • shape (SpectralShape) – Spectral shape used to create the spectral distribution.

  • kwargs (Any) – {colour.colorimetry.sd_single_led_Ohno2005()}, See the documentation of the previously listed definition.

Returns:

Multi LED spectral distribution.

Return type:

colour.SpectralDistribution

Notes

References

[Ohn05], [OD08]

Examples

>>> sd = sd_multi_leds_Ohno2005(
...     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...