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UDC 621.391

LOW CONTRAST AND NARROWBAND IMAGE CODING BASED ON NONLINEAR FORMING SYSTEM

M. V. Stremoukhov, PhD (technical sciences), Employer, The Academy of Federal Security Guard Service of the Russian Federation; This email address is being protected from spambots. You need JavaScript enabled to view it.
M. V. Ilyushin, PhD (technical sciences), Employer, The Academy of Federal Security Guard Service of the Russian Federation; This email address is being protected from spambots. You need JavaScript enabled to view it.
V. V. Dvoryadkin, Employer, The Academy of Federal Security Guard Service of the Russian Federation; This email address is being protected from spambots. You need JavaScript enabled to view it.

In course of information support of subscribers the problem to transmit video information received in conditions of low luminosity arises. The images acquired in difficult environments, such as faint of illumination intensity, precipitations, fog, smoke and etc., are characterized by low contrast and narrow dynamic range (or narrow band). The standard methods like this image coding do not support of the control information exchange demanded quality.
The aim of the work is to develop algorithms of effecting coding and decoding of the images like that on the basis of parametric nonlinear coding of video information considering nonlinear dependencies between image elements. The authors suggest parametric images coding method, based on nonlinear forming system parameters optimization at given stimulus sequence. Experimental results show that the offered method provides higher quality of restoration while coding image of a certain type.

Key words: low contrast and narrowband image coding; quality of image compression; parametric coding; nonlinear forming system; nonlinear relationships.

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