Spectral locus interpolation with splines in optical instruments

International Conference "Modern Technologies and Materials of New Generations"

Zharinov, I.O.^1 ; Zharinov, O.O.^2

Department of Computer Design of On-Board Computer Equipment, Saint Petersburg National Research University of Information Technologies, Mechanics and Optics, Kronverksky ave., 49, Saint Petersburg

197101, Russia^1

Department of Problem-Oriented Computing Complexes, Saint Petersburg State University of Aerospace Instrumentation, Bolshaya Morskaia str., 69, Saint Petersburg

190000, Russia^2

关键词: Analytical expressions;    Chromaticity coordinates;    Chromaticity diagram;    Discrete sets;    Dominant wavelength;    Evaluation accuracy;    Luminous radiation;    Saturation values;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/286/1/012013/pdf
DOI  :  10.1088/1757-899X/286/1/012013

来源: IOP

【 摘 要 】

The article deals with the problem of representation of the spectral locus curve on the CIE xy chromaticity diagram. The issue is that spectral locus is specified at discrete set of points corresponding to given set of wavelengths of monochromatic colors. Thus, the problem appears which way to calculate chromaticity coordinates for any other wavelength. Three different methods how to interpolate the spectral locus were considered. The method we proposed to build an interpolant curve is based on using of Bezier curves. This approach allows to calculate chromaticity coordinates for any arbitrary wavelength directly on the CIE xy chromaticity diagram. Obtained analytical expressions for the spectral locus curve will increase the evaluation accuracy of the luminous radiation dominant wavelength value which defines the hue and the saturation value of the emitting color and other things.