colour.sd_gaussian¶
-
colour.
sd_gaussian
(mu_peak_wavelength, sigma_fwhm, shape=SpectralShape(360, 780, 1), method='Normal')[source]¶ Returns a gaussian spectral distribution of given spectral shape using given method.
Parameters: - mu_peak_wavelength (numeric) – Mean wavelength \(\mu\) the gaussian spectral distribution will peak at.
- sigma_fwhm (numeric) – Standard deviation \(sigma\) of the gaussian spectral distribution or Full width at half maximum, i.e. width of the gaussian spectral distribution measured between those points on the y axis which are half the maximum amplitude.
- shape (SpectralShape, optional) – Spectral shape used to create the spectral distribution.
- method (unicode, optional) – {‘Normal’, ‘FWHM’}, Computation method.
Returns: Gaussian spectral distribution.
Return type: Notes
- By default, the spectral distribution will use the shape given by
colour.DEFAULT_SPECTRAL_SHAPE
attribute.
Examples
>>> sd = sd_gaussian(555, 25) >>> sd.shape SpectralShape(360.0, 780.0, 1.0) >>> sd[555] # doctest: +ELLIPSIS 1.0000000... >>> sd[530] # doctest: +ELLIPSIS 0.6065306... >>> sd = sd_gaussian(555, 25, method='FWHM') >>> sd.shape SpectralShape(360.0, 780.0, 1.0) >>> sd[555] 1.0 >>> sd[530] # doctest: +ELLIPSIS 0.3678794...