colour.colorimetry.sd_gaussian_fwhm¶

colour.colorimetry.sd_gaussian_fwhm(peak_wavelength, fwhm, shape=SpectralShape(360, 780, 1))[source]¶

Returns a gaussian spectral distribution of given spectral shape at given peak wavelength and full width at half maximum.

Parameters

peak_wavelength (numeric) – Wavelength the gaussian spectral distribution will peak at.
fwhm (numeric) – 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.

Returns

Gaussian spectral distribution.

Return type

SpectralDistribution

Notes

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

Examples

>>> sd = sd_gaussian_fwhm(555, 25)
>>> sd.shape
SpectralShape(360.0, 780.0, 1.0)
>>> sd[555]
1.0
>>> sd[530]  
0.3678794...