Color measurement software
Avantes

The AvaSoft Color Application has been developed to perform on- and off-line color measurements with a spectrometer system. It can be used for reflective color measurements. This application provides a precise way to perform color measurements using the basic principles and techniques defined by the International Committee on Illumination (CIE). The CIE 1976 L*a*b* color parameters are calculated, as well as other frequently used parameters, like Hue, Chroma and X, Y, Z.

These parameters can be displayed in a CIELAB chart or in a graph versus time. It is also possible to save the measured L*a*b* values online to a database and use one of the products from the database as a reference color. By comparing the measured L*a*b* values to the stored database values, color differences (ΔELab, ΔL*, Δa*, or Δb*) can be measured as well.

The color of an object can be expressed by the CIE 1976 (L*a*b*) color space. L* describes the brightness of the color. A positive value of a* describes the redness of the color, a negative a* the greenness. Similarly, yellowness or blueness is expressed by coordinate b*, which is positive for yellow and negative for blue. The L*a*b* values are derived from the CIE tristimulus values X, Y and Z of the sample (object) and the standard illuminant tristimulus values Xn, Yn and Zn.