QUANTITATIVE ASSESSMENT OF THE PRECIOUS STONES COLOR BY MACHINE VISION

摘要

The quality and value of precious stones is determined by a set of indicators such as color, purity, dimension, type and quality of cut. This article is devoted to the problem of assessment of the color of precious stones as one of the crucial quality indicators. To date, the color is usually evaluated by an expert who relies on his/her own color perception and a set of master stones (precious stones color standards). The authors propose an alternative way of determining the color using special hardware and software and standard colorimetric techniques. On the example of green ("emerald") shades the possibility of digital classification of precious stones by color is shown.