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In this paper, the problem of assessing the perceived contrast of image elements for no-reference measurement of the global contrast of complex (multi-element) images is considered. A new method for assess the perceived contrast of elements of complex image is proposed on the basis of measuring of the contrast of these elements on a prenormalized image with subsequent correction of the contrast value taking into account the dynamic range of the primary (original) image. A new generalized description of the perceived contrast of the image elements for different definitions of the contrast kernel is suggested. New definitions of the weighted and relative contrast of the image elements are proposed. A comparative analysis of the proposed and known definitions of the weighted and relative contrast of image elements was carried out.

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