1531 KB41 KB200020242013Eisengräber-Pabst, JobstLehmann, MartinMoghiseh, AliOhser, Joachimštevilka:2letnik:32str. 77-87ISSN:1580-3139COBISSID:30797529URN:URN:NBN:SI:doc-IVVOYSOLenDruštvo za stereologijo in kvantitativno analizo slike, Medicinska fakultetaImage analysis and stereologyanaliza slikBartlett spectrumBartlettov spekterchart cloudinessfiber systemfilter paperfiltrirni papirformationimage analysismikrostrukturavlaknaCharacterization of the formation of filter paper using the Bartlett spectrum of the fiber structure|The formation index of filter paper is one of the most important characteristics used in industrial quality control. Its estimation is often based on subjective comparison chart rating or, even more objective, on the power spectrum of the paper structure observed on a transmission light table. It is shown that paper formation can be modeled as Gaussian random fields with a well defined class of correlation functions, and a formation index can be derived from the density of the Bartlett spectrum estimated from image data. More precisely, the formation index is the mean of the Bessel transform of the correlation taken for wave lengths between 2 and 5 mmTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaDruštvo za stereologijo in kvantitativno analizo slike