Abstract
Proposals for further progress of video technologies, issues that need to be resolved to implement this progress and possible ways to implement them in real devices of special and general application are made. It is proposed to supplement the conventional model of the video path with a color perception model and an adaptive model of the spectral power distribution of the illuminant. Attention is paid to the end devices of the video path, which may introduce unacceptable changes in the transmitted video information, namely color. The schemes of the algorithm of adaptation to the spectral power distribution of the illuminant are presented. The possibility of universal use of the proposed algorithm in video transmission systems is considered. The algorithm of video image adaptation to the spectral power distribution of illuminants based on the selection of reference spectral power distributions with the given color coordinates is proposed. The algorithm of allocation of the spectral power distribution of the illuminant from the overall image scene is presented. Metrological support to assess the influence of the illuminant on the quality of color rendering is proposed. It is proposed to use spectral color distributions, the set of which is presented in the paper, as optical test images for testing the color rendering quality. Comparative characteristics with existing sets of spectral power distributions are presented and it is shown that they are not enough to implement the proposed algorithm. The simulation results prove the necessity and advantages of using the proposed algorithm. The image after the application of the algorithm is such if it was observed in sunlight, regardless of what type of lighting was used during shooting or observation. In addition, the presented algorithm allows adaptation to the spectral power distribution of various illuminants, such as incandescent lamps, fluorescent, LED, signal flares, and the like
Highlights
The progress of video technologies is observed in the development of standardization, with the advent of digital television systems – standard and high definition television systems [1], and the recommendation appears [2]
Further progress of video technologies can be seen in the introduction of the high dynamic range (HDR) system [3]
0.023 In Table 6, color markers indicate pairs that satisfy two test colors, but with different errors. This is caused by the fact that the insufficient set of spectral power distributions is presented in the papers, so some of them were chosen for both colors due to the lack of other spectra
Summary
The progress of video technologies is observed in the development of standardization, with the advent of digital television systems – standard and high definition television systems [1], and the recommendation appears [2]. This indicates the insufficiency and the need for improving the existing and creating fundamentally new solutions in video transmission systems. No research is conducted on this complex effect during the transmission by video channels These studies are relevant primarily in places where color rendering by video channels is extremely important, namely, in special and military applications, in e-medicine, textile industry, etc
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