speceval
The speceval function evaluates spectral power distribution(s) for several parameters.
Photometry
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.
plotpolarE
Calculates the resulting horizontal and vertical illuminances for a given Tregenza luminance distribution with 145 patches
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
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
cief1
Calculates the f1 error of photometers, or more precisely the mismatch index to the V(λ) curve
cieedq
Determines the α-opic equivalent daylight D65 quantity for a given spectrum
ciemedi
Determines the melanopic equivalent daylight D65 illuminance for a given spectrum