Create a light source structure. Only used for Macbeth chart creation
lightSource = illuminantCreate(iName,temperature,luminance,spectrum)
Create a lightSource data structure, containing information about an
illuminant. The lightSource is organized approximately as a scene
structure and can be addressed using sceneGet. But it has a unique
status. I don't think it is used anywhere else, so it has not been
thoroughly tested.
A few standard light sources are supported at present. These are d65,
d50, tungsten, fluorescene, blackbody's (over a range of color
temperatures), 550nm. See the internal routine, readIllumination (below).
Examples:
lightSource = illuminantCreate('d65')
lightSource = illuminantCreate('blackbody',3500,100)
lightSource = illuminantCreate('blackbody',6500,100)
Copyright ImagEval Consultants, LLC, 2005.