Compensation for Color Distortions in End-to-End Video Transmission Paths with Regards to the Spectral Composition of Light Sources

Abstract

This paper presents the results of color perception modeling, taking into account the spectral distribution of light sources and the spectral properties of light-signal converters. The results show that a bandpass filter, whose effect on the original colors of the scene elements leads to a shift in the chromaticity coordinates, can model the spectral characteristics of the light-signal transducers. The spectral properties of the light sources at the transmitting and receiving side can be simulated by convolution with the output spectra of the photosensitive arrays, and the combined effect can lead to a shift in color coordinates that exceed the color difference thresholds. The calculations of the maximum shifts for sources of daylight illumination, incandescent lamps and fluorescent sources are given. It is proposed to include in the path from light to light-special signals that correct color shifts.