%0 Journal Article %T CHARACTERIZATION OF THE FORMATION OF FILTER PAPER USING THE BARTLETT SPECTRUM OF THE FIBER STRUCTURE %A Martin Lehmann %A Jobst Eisengr£¿ber-Pabst %A Joachim Ohser %A Ali Moghiseh %J Image Analysis and Stereology %D 2013 %I Slovenian Society for Stereology and Quantitative Image Analysis %R 10.5566/ias.v32.p77-87 %X 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 mm. %K Bartlett spectrum %K chart cloudiness %K ber system %K lter paper %K formation %K image analysis %U http://www.ias-iss.org/ojs/IAS/article/view/986