27 KB154 KB14 KB200020242001Douiri, NisrineKhoudeir, MajdiOlivier, Christianletnik:20številka:35 stranistr. 225-229ISSN:1580-3139COBISSID:16038873URN:URN:NBN:SI:doc-0BD64224enDruštvo za stereologijo in kvantitativno analizo slike, Medicinska fakultetaImage analysis and stereologybivališčaBivališčeHousingImage Processing, Computer-AssistedRadijski valoviRadio WavesSlika, obdelava z računalnikomtelecommunicationTelecommunicationsTelekomunikacijeRoughness characterization of an indoor environment|For a transmission at 60 GHz inside the buildings, the models of propagation currently developed do not take into account the 3D roughness of surfaces under consideration. In this paper, we deal with the evaluation of the 3D roughness of surfaces in this kind of environment. An indoor environment includes different types of surfaces but the most representative of 3D roughness are walls, ceiling and floor. We propose a method to characterise the 3D roughness of these surfaces by constructing an image space made up of the original image, the image of gradient, the image of curvature and the image of the angles between the perpendicular to the grey level surface and the perpendicular to the whole image. The method we have developed is based, first, on the study of correlation variations of our image space, and second on a frequency analysis of the angle image histograms. The elaborated criteriaallowed us to classify the surfaces studiedTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaDruštvo za stereologijo in kvantitativno analizo slike