Spectral and XYZ Color Functions

Label plots with spectra. Convert wavelengths to RGB. Functions for color matching and illuminants.

Description

This is the beginning of a set of functions for working with color as wavelengths (spectral color) and in the xyY and XYZ color spaces.

Current functionality includes:

spectrumLabel - Add a color bar containing the visible spectrum to a plot's X axis.

spectrumRGB - Converts wavelengths of light to equivalent RGB values (in the sRGB space).

colorMatchFcn - Raw data of popular color matching functions (spectra to XYZ) for various standard observers:
  * CIE 1931 2-degree
  * CIE 1964 10-degree
  * CIE 1931 2-degree modified by Judd (1951)
  * CIE 1931 2-degree modified by Judd (1951) and Vos (1978)
  * Stiles and Burch 2-degree (1955)
  * Stiles and Burch 10-degree (1959)

illuminant - Raw data for the A, D65, and E standard illuminants.

• Required Products: Image Processing Toolbox
• MATLAB release: MATLAB 7.0.1 (R14SP1)
• Other Files: spectrumLabel.m, ; createSpectrum.m, ; spectrumRGB.m, ; illuminant.m, ; colorMatchFcn.m

[Wu John]

Good job! Thank you,but how about the other light source in illuminate.m?

[colour rainbow]

could you able to create function for r2xyz
for 1xm or 1xn matrix

[marwan reyadh]

please how can i convert an image from RGB of size n*n*3 to an image with of size n*n*n

[Levent Onural]

Thanks a lot, I have been looking for how I could generate the matching functions for 5 hours. Excellent piece of work...

[ben taylor]

Does anyone know hot to convert it the other way? I have an RGB image of black body radiation and I am writing a program that will give me a 3d temperature plot, but I need to convert from RGB to wavelength to temperature.

Thanks,

[Vishnuvenkatesh Dhage]

 

[NOne None]

None

[jeongwoon lee]

 

[Neeraj Adsul]

 

[Franck Riberi]

Need demo files absolutely.