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T-Comm_Article 2_4_2020

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Aleksei M. Potashnikov, Moscow Technical University of Communications and Informatics, Moscow, Russia, nickmikh@gmail.com
Igor V. Vlasuyk, Moscow Technical University of Communications and Informatics, Moscow, Russia, ru3dlp@yandex.ru

The paper analyzes the current use of equal-contrast color spaces and shows that, on the one hand, in fact, there is only one such color model of in various variations, on the other hand, there are many applications where it would be desirable to use a color model with both predefined restrictions on the complexity and, accordingly, the accuracy of matching the parameters of the visual system, and the ability to set the initial conditions of the experiment, such as, for example, adaptation conditions, field of view, various temporal parameters of test stimuli because the human visual system is characterized by a complex nonlinear multidimensional function transformation parameters of sense stimuli. The possibility of using «specialized» models ranges from optimizing the presentation of information, for example, when painting images in pseudo colors, to creating display devices with personalized parameters. The work contains a justification, taking into account the known parameters and characteristics of the human visual system, and the development of methods for conducting preliminary experimental studies, and processing the results of its application in a group of 66 subjects. Next, we consider all the stages of processing the experimental results in such a way that, if necessary, readers can perform similar processing for their experimental results obtained with the required conditions. Unlike previous attempts to create an equal-contrast color space, it was possible to obtain non-discontinuous expressions that allowed us to perform transitions from XYZ or RGB spaces to the proposed one and vice versa. The resulting color space is already used in solving practical problems of optimal color contrasting of objects, while a further area of work is the introduction of the dependence of color differentiation of parts of objects on their brightness into the model, which, however, requires a significant increase in the number of experiments.

Keywords: color space, CIE LAB, color distinguishability threshold, equal contrast space, color model, human visual system.


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