39 KB54997 KB24 KB200020242008Jeulin, DominiqueMoreaud, Maxime10 straniletnik:27številka:3str. 183-192ISSN:1580-3139COBISSID:25400025URN:URN:NBN:SI:doc-QPT3HWY3enDruštvo za stereologijo in kvantitativno analizo slike, Medicinska fakultetaImage analysis and stereologyanaliza slikCelluloseCelulozaFourier AnalysisFourierjeva analizaImage Processing, Computer-AssistedMicroscopy, ElectronMikroskopija elektronskamikrostrukturaSlika, obdelava z računalnikomstereologijaSegmentation of 2D and 3D textures from estimates of the local orientation|We use a method to estimate local orientations in the n-dimensional space fromthe covariance matrix of the gradient, which can be implemented either in the image space or in the Fourier space. In a second step, two methods allow us to detect sudden changes of orientation in images. The first one uses an index of confidence of the estimated orientation, and the second one the detection of minima of scalar products in a neighbourhood. This is illustratedon 2D Transmission Electrons Microscope images of cellulose cryofracture (to display the organisation of cellulose whiskers and the pointsof germination), and to 3D images of a TA6V alloy (lamellar microstructure) obtained by microtomographyTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaDruštvo za stereologijo in kvantitativno analizo slike