Return spectral radiance of a standard illuminants
spectralRadiance = readIllumination(lightParameters,lightName)
The illuminant parameters can be controlled by using the structure
lightParameters. See the example below for how to set the values of this
structure.
If you don't wish to control the parameters, but only to get an
illuminant by name, the spectral radiance is returned at 400:10:700
nm samples and the mean luminance is 100 cd/m2.
The standard illuminant names are:
{'tungsten'}
{'illuminantc'}
{'d50'}
{'fluorescent'}
{'d65','D65'}
{'equalenergy'}
{'blackbody'} -- You must specify a color temperature in
lightParameters.temperature
{'555nm'}
The lightParameters structure is idiosyncratic and used only here.
See also: illuminantCreate
Examples:
readIllumination([],'d65')
readIllumination([],'tungsten')
lightParameters.name = 'd65';
lightParameters.spectrum.wave = 400:10:700;
lightParameters.luminance = 100;
readIllumination(lightParameters);
lightParameters.name = 'blackbody';
lightParameters.temperature = 3000;
lightParameters.spectrum.wave = 400:10:700;
lightParameters.luminance = 100;
sr = readIllumination(lightParameters);
Copyright ImagEval Consultants, LLC, 2005.