colour.sd_CIE_standard_illuminant_A#

colour.sd_CIE_standard_illuminant_A(shape: SpectralShape = SPECTRAL_SHAPE_DEFAULT) → SpectralDistribution[source]#

Represent typical domestic tungsten-filament lighting according to CIE Standard Illuminant A.

Generate spectral distribution of CIE Standard Illuminant A, which represents the spectral characteristics of a Planckian radiator at a temperature of approximately 2856 K. This illuminant should be used in all colorimetry applications involving incandescent lighting, unless there are specific reasons for using a different illuminant.

Parameters:

shape (SpectralShape) – Spectral shape used to create the spectral distribution of the CIE Standard Illuminant A.

Returns:

CIE Standard Illuminant A spectral distribution.

Return type:

colour.SpectralDistribution

References

[CIET14804a]

Examples

>>> from colour import SpectralShape
>>> sd_CIE_standard_illuminant_A(SpectralShape(400, 700, 10))
...
SpectralDistribution([[400.        ,  14.7080384...],
                      [410.        ,  17.6752521...],
                      [420.        ,  20.9949572...],
                      [430.        ,  24.6709226...],
                      [440.        ,  28.7027304...],
                      [450.        ,  33.0858929...],
                      [460.        ,  37.8120566...],
                      [470.        ,  42.8692762...],
                      [480.        ,  48.2423431...],
                      [490.        ,  53.9131532...],
                      [500.        ,  59.8610989...],
                      [510.        ,  66.0634727...],
                      [520.        ,  72.4958719...],
                      [530.        ,  79.1325945...],
                      [540.        ,  85.9470183...],
                      [550.        ,  92.9119589...],
                      [560.        , 100.       ...],
                      [570.        , 107.1837952...],
                      [580.        , 114.4363383...],
                      [590.        , 121.7312009...],
                      [600.        , 129.0427389...],
                      [610.        , 136.3462674...],
                      [620.        , 143.6182057...],
                      [630.        , 150.8361944...],
                      [640.        , 157.9791857...],
                      [650.        , 165.0275098...],
                      [660.        , 171.9629200...],
                      [670.        , 178.7686175...],
                      [680.        , 185.4292591...],
                      [690.        , 191.9309499...],
                      [700.        , 198.2612232...]],
                     SpragueInterpolator,
                     {},
                     Extrapolator,
                     {'method': 'Constant', 'left': None, 'right': None})