Results of the study of the possibility of replacing the Gia GemSet, designed for evaluating the color of precious stones, with digital simulators for automated control systems

Abstract

Currently, the quality of precious stones is assessed by the organoleptic method. To identify their color experts use a set of Gia GemSet imitators made of transparent acrylic plastic-a polymer with a high refractive index, and with its own GIA color space. The authors conducted research on the optical characteristics of the GIA GemSet set in order to study the possibility of replacing physical standards with digital simulators for automated control systems. The research was carried out using two methods: spectral and technical vision. Spectral measurements were performed using a USB4000 fiber-optic spectrometer. To determine the color characteristics of digital images, we used a proprietary hardware and software package. Based on the research results, a color body of the GIA GemSet for the case of a standard D65 source is constructed, which gives a visual representation of the characteristics of the set. The correspondence between the color coordinates of the samples obtained by the two methods is established, which confirms the possibility of automation of color of precious stones evaluation process.