This tool calculates CIE colorimetric values from visible spectra . The spectra must be in units of nanometers vs. Reflectance and cover the spectral range of 360 to 830 nanometers.
CIE is the International Commission on Illumination. This body makes recomendations for colorimetry and photometry. The standards specify the light source (or illuminant) and the observer (field of view).
This tool is an add-on plugin. Click here to download the plugin: setup_cieTool.exe After installation, the tool will appear in the 'Analysis' toolbox with the label 'CIE Color Measurement'.
A collection of 24 sample spectra are available, click here to download them. These spectra correspond to the 24 ColorChecker tiles produced by X-Rite. The tiles are an array of 24 scientifically formulated colors that have been the leading industry color reference target for more than 40 years.
|The X-Rite ColorChecker tiles|
This tool is essential for color-matching measurements. Many application areas make use of this analysis:
Peak uses these CIE illuminants:
And these CIE standard observers:
These color space values are calculated and reported by Peak Spectroscopy Software:
For more information on the theory and calculations, please see this helpful and informative site: www.brucelindbloom.com