• Colorimetry
• Data visualisation
• Daylight
• Image processing
• Lighting control
• Lighting Toolbox documentation
• Photometric measurements
• Radiometry
• α-opic metrology

Lighting Toolbox documentation

• chromad

  Calculates chromatic adaptation matrices for the CIE 1931 x,y,z chromaticity

• cieblh

  Evaluates the Blue Light Hazard for a given spectral radiance L according to CIE S 009

• cieCAM02

  Determines the colour appearance model parameters of the CIECAM02 forward model

• cieCAM02inv

  Determines the colour appearance model parameters of the CIECAM02 inverse model

• ciecct2spec

  Calculates the corresponding spectral daylight distribution for a given CCT

• ciecfi

  Determines the colour fidelity index

• ciecri

  Determines the colour rendering index

• cieedq

  Determines the α-opic equivalent daylight D65 quantity for a given spectrum

• cief1

  Calculates the f1 error of photometers, or more precisely the mismatch index to the V(λ) curve

• ciek

  Returns the α-opic or blue light hazard luminous efficacy K for any given spectral power distribution

• cielab2lch

  Transforms CIE L*a*b* chromaticity coordinates to the alternative LCh model

• cielab2xyz

  Calculates the transformation of CIE L*a*b* chromaticity coordinates to CIE 1931 x,y,z chromaticity coordinates

• cielch2lab

  Transforms CIE LCh chromaticity coordinates to the alternative L*a*b* model

• ciemedi

  Determines the melanopic equivalent daylight D65 illuminance for a given spectrum

• ciesky

  Calculates the corresponding luminance distribution for a Tregenza hemisphere with 145 patches according to the CIE procedure described in ISO 15469

• ciespec

  Contains various reference spectra provided by the CIE

• ciespec2aopic

  Derives the α-opic quantities from any given spectral power distribution

• ciespec2cct

  Derives the Correlated Colour Temperature (CCT) for a given spectral power distribution (SPD)

• ciespec2unit

  Weights given spectra with provided reference weighting functions and returns the integrated values

• ciespec2uvw

  Calculates the normalized CIE 1960 Uniform Colour Space (UCS) coordinates u,v,w for a given spectral power distribution

• ciespec2wp

  Determines the white point of an illuminant’s spectral power distribution

• ciespec2xyz

  Calculates the normalized CIE 1931 colour coordinates x,y,z for a given spectral power distribution

• ciespec2Y

  Calculates the integrated photometric value Y of a V(λ) weighted spectral power distribution

• cieuv2cct

  Calculates the Correlated Colour Temperature (CCT) from given CIE 1960 chromaticity coordinates u and v

• cieuv2xy

  Transforms CIE 1960 chromaticity coordinates u and v to CIE 1931 chromaticity coordinates x and y

• ciewhitepoint

  Returns the white point in CIE 1931 x and y chromaticity of any CIE standard illuminant

• ciexy2cct

  Calculates the Correlated Colour Temperature from given CIE 1931 chromaticity coordinates x and y

• ciexy2uv

  Transforms CIE 1931 chromaticity coordinates x and y to CIE 1960 chromaticity coordinates u and v

• ciexyY2XYZ

  Determines the CIE cone-fundamental-tristimulus values X,Y,Z from CIE 1931 x and y chromaticity coordinates and the corresponding photometric unit Y

• ciexyz2lab

  Calculates the transformation of CIE x,y,z chromaticity coordinates to CIE L*a*b* chromaticity coordinates

• cieXYZ2xyz

  Calculates the normalized CIE 1931 chromaticity coordinates from standard CIE X,Y,Z tristimulus values

• colours

  Creates a n x 3 colour-matrix

• egrid

  Creates a two-dimensional coordinate grid for illuminance measurements, depending on the size of the measurement area

• getskytype

  Determines the CIE general standard sky type for a given luminance distribution of a Tregenza hemisphere

• hyperspec2srgb

  Creates a sRGB colour image from a hyperspectral image matrix

• hyperspec2unit

  Derives a photometric or radiometric image from a hyper-spectral image matrix

• jetiaim

  Enables the target laser in a JETI specbos spectroradiometer

• jeticon

  Creates a serial connection to a JETI specbos spectroradiometer

• jetimeas

  Triggers a measurement of a JETI specbos spectroradiometer

• jetioff

  Disables the target laser in a JETI specbos spectroradiometer

• kobavskytype

  Determines the CIE general standard sky type for a given luminance distribution of a Tregenza hemisphere as described by Kobav et al.

• ldc2phi

  Calculates the luminous flux Φ of a luminaire from its luminous intensity distribution curve

• planck

  Calculates the spectral radiant exitance M of a Planck radiator for a given black body temperature

• plot2dldc

  Plots a 2D illustration of a given light intensity distribution curve

• plot3dldc

  Plots a 3D illustration of a given light intensity distribution curve

• plotaopic

  Plots α-opic images from the αΩ-meter

• plotcfi

  Creates a plot of the chromatic shift in a’ and b’ dimension according to the Colour Fidelity Index in CIE 224:2017 and ANSI TM30-20

• plotcfibar

  Plots the special colour fidelity indices which form the general colour fidelity index

• plotcieuv

  Plots the CIE 1960 u and v chromaticity diagram

• plotcieuv_

  Plots the CIE 1976 u’ and v’ chromaticity diagram

• plotciexy

  Plots the CIE 1931 x and y chromaticity diagram

• plotcolour

  Plots a series of colours defined in an n x 3 matrix.

• plotcribar

  Plots the special colour rendering indices which form the general colour rendering index

• plotfalsecolours

  Creates a false-colour illustration for a given data set

• plotgrid

  Creates an iso-line, iso-colour or false-colour plot for a given mesh-grid and the according data

• plotisocolours

  Creates an isoline false colour illustration for a given data distribution on a surface

• plotisolines

  Creates an isoline illustration for a given data distribution on a surface

• plotorder

  Plots several graphs in user defined colours, line styles and markers

• plotskydirecto

  Creates a directogram plot of a Tregenza sky hemisphere

• plotspec

  Plots a given spectrum with corresponding colours in the visible wavelength part

• plotspecrange

  Creates a statistical evaluation of an arbitrary number of spectra and plots the mean values, standard deviation and the minima and maxima values

• plotspecslice

  Creates an illustration of spectral false colour slices of several input spectra

• plottregenza

  Creates a 2D illustration of the Tregenza sky hemisphere

• polardataCCT

  Calculates the resulting horizontal and vertical Correlated Colour Temperatures from the Tregenza radiance distribution with 145 patches and the colour coordinates x and y

• polardataE

  Calculates the resulting horizontal and vertical illuminances for a given Tregenza luminance distribution

• readaopic

  Reads α-opic image data from the αΩ-meter

• readldt

  Imports the luminous intensity distribution curve from EULUMDAT files

• readpcfimage

  Reads a luminance camera XYZ colour .pcf image file

• readpfimage

  Read a luminance camera .pf image file.

• saveplot

  Allows for easy figure export in Matlab and Octave

• south

  Returns the (UTC) for True Solar Time (TST) 12:00 according to DIN EN 17037

• spec2srgb

  Transforms spectra to MATLAB/Octave sRGB values

• srgb2xyz

  Transforms srgb values to CIE 1931 x,y,z, chromatic coordinates

• sunpos

  Calculates the sun position according to DIN EN 17037 from UTC

• tregenzadist

  Determines the nearest neighbour patches and the angular distance to a given tregenza hemisphere patch

• tregenzaskytype

  Determines the CIE general standard sky type for a given luminance distribution of a Tregenza hemisphere

• TST

  Calculates the True Solar Time (TST) according to DIN EN 17037 from Coordinated Universal Time (UTC)

• xyz2srgb

  Transforms CIE 1931 x,y,z chromaticity coordinates to srgb values