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Scientific Review. Geographical Sciences

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PARAMETRIC DESCRIPTION OF COLOURED STONE PATTERN

Петров Т.Г., Шуйский А.В.
Features of the coloured stone pattern are described and the method for parametric description of its properties is proposed, including: lightness, contrast, complexity, cohesiveness, isotropy, rhythmicity. For their computation, the image is represented as a digital matrix of lightness. Complexity is measured by C. Shannon entropy, the latter three parameters – using the autocorrelation function. The first five parameters are normalized to the interval 0–1. Granite, marble, natural, grown malachite, and malachite imitations are considered as real-world objects. Parametric description of patterns can be used for their systematization by the chosen parameter, material preparation for facing and restoration work, as well as when creating inlaid products. In the doctrine of sedimentary rocks, isotropy can be used to measure the degree of their metamorphism and during geomapping. The proposed method of patterns description is a necessary and sufficient condition for the transition to patterns coding and their classification using RHA information language, approved as interdisciplinary.