speceval
The speceval function evaluates spectral power distribution(s) for several parameters.
Calculation functions
ciespec2xyz10
The ciespec2xyz10 function calculates the normalized CIE 1931 colour coordinates x,y,z for the 10 degree standard observer, for a given spectral power distribution
mixYxy
The mixYxy function calculates the resulting chromaticity coordinates from n mixed inputs.
specsky
Creates spectral radiance data for a Tregenza hemisphere with 145 patches for CIE sky types 3 and 12
cieCAM02inv
Determines the colour appearance model parameters of the CIECAM02 inverse model
cieCAM02
Determines the colour appearance model parameters of the CIECAM02 forward model
cieXYZ2xyz
Calculates the normalized CIE 1931 chromaticity coordinates from standard CIE X,Y,Z tristimulus values
srgb2xyz
Transforms srgb values to CIE 1931 x,y,z, chromatic coordinates
xyz2srgb
Transforms CIE 1931 x,y,z chromaticity coordinates to srgb values
sunpos
Calculates the sun position according to DIN EN 17037 from UTC
planck
Calculates the spectral radiant exitance M of a Planck radiator for a given black body temperature
getskytype
Determines the CIE general standard sky type for a given luminance distribution of a Tregenza hemisphere
egrid
Creates a two-dimensional coordinate grid for illuminance measurements, depending on the size of the measurement area
ciewhitepoint
Returns the white point in CIE 1931 x and y chromaticity of any CIE standard illuminant
ciespec2Y
Calculates the integrated photometric value Y of a V(λ) weighted spectral power distribution
ciespec2xyz
Calculates the normalized CIE 1931 colour coordinates x,y,z for a given spectral power distribution
ciespec2wp
Determines the white point of an illuminant’s spectral power distribution
ciespec2unit
Weights given spectra with provided reference weighting functions and returns the integrated values
ciesky
Calculates the corresponding luminance distribution for a Tregenza hemisphere with 145 patches according to the CIE procedure described in ISO 15469
ciek
Returns the α-opic or blue light hazard luminous efficacy K for any given spectral power distribution