Measurement software AvaSoft-COL

databasecoloronline

AvaSoft-COL is the ideal companion for online and offline reflective colour measurements. This application provides a precise way to perform colour measurements using the basic principles and techniques defined by the International Commission on Illumination (CIE). The CIE 1976 L*a*b* colour parameters are calculated, along with other parameters, like Hue, Chroma, and X, Y, Z. These parameters can be displayed in a CIELAB chart or in a graph versus time. Another possibility is saving the measured L*a*b* values to an online database and using one of the products from the database as a reference colour. Colour differences (ΔELab, ΔL*, Δa*, or Δb*) are achieved by comparing the measured L*a*b* values to the stored database values. The colour of an object can be expressed by the CIE 1976 (L*a*b*) colour space. L* describes the brightness of the colour. A positive value of a* describes the redness of the colour, a negative a* the greenness. Similarly, yellowness is a positive b*, where blue is a negative b*. 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. The standard illuminant tristimulus values for Xn, Yn, and Zn are constant and depend only on the type of standard illuminant selected.