Alexis Spectral Data is a software developed for colour matching processes that calculates from available
spectral
''Spectral'' is a 2016 3D military science fiction, supernatural horror fantasy and action-adventure thriller war film directed by Nic Mathieu. Written by himself, Ian Fried, and George Nolfi from a story by Fried and Mathieu. The film stars ...
data the colour numbers used by computers to display colours on screen. It displays the colour for each
spectral reflectance
The reflectance of the surface of a material is its effectiveness in reflecting radiant energy. It is the fraction of incident electromagnetic power that is reflected at the boundary. Reflectance is a component of the response of the electronic ...
curve and records the calculated
trichromatic values and colour numbers along with the spectral curves. This eliminates the need to scan the samples separately with a
truecolour Scanner while creating the database. The spectral data can be introduced manually as a series of
reflectance values at
wavelength
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.
It is the distance between consecutive corresponding points of the same phase on the wave, such as two adjacent crests, t ...
s measured in different
standard illuminant
A standard illuminant is a theoretical source of visible light with a spectral power distribution that is published. Standard illuminants provide a basis for comparing images or colors recorded under different lighting.
CIE illuminants
The Inter ...
s with an arbitrary but fixed increment that must be kept for each spectral curve throughout the creation of the whole database. Therefore, older UV-VIS
Spectrophotometers
Spectrophotometry is a branch of electromagnetic spectroscopy concerned with the quantitative measurement of the reflection or transmission properties of a material as a function of wavelength. Spectrophotometry uses photometers, known as spec ...
that can't be
interfaced with computers can also be used for creating the database needed for colour matching. Alexis Spectral Data determines the
whiteness degree in a less time-consuming method, which permits storage and easier handling of the obtained data.
Alexis Spectral Data can export the trichromatic values, calculated from the spectral curves, to Alexis Analyser, software that handles only trichromatic data. The earliest information about the development of this software comes from a paper published by a student at the
University Politehnica Bucharest in 1993.
[Razvan Ion M. Preda, Mircea Popescu, "True RGB colour analysis", Chemistry and Chemical Engineering Conference, Bucharest 1998, Conference Proceedings, vol. 2, 437-441]
The software runs on Windows based computers but not on other operating systems.
References
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Graphics software