A.I. Mazurov, K.A. Raevskaya

Physical parameters used by human visual system to collect spectra into indiscernible (metameric) groups being perceived psychologically as one color is an important unsolved colorimetric task. Solving problems of color physical parameters authors based on light quantum theory and H. Grassmann-s laws one of which establishes color three-dimensionality while the other tells that by mixing colors their quantities are summed up. Along with conventional RGB, XYZ colorimetric systems for colorimetric calculations there can be used ΦΕD (E) system.