Acta Stereologica



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Viktor Beneš & Margarita Slámová

Multivariate unfolding problems

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The classical stereological unfolding problem for particle systems is studied. While previously at most bivariate problems were solved, here a multivariate version is formulated. Then the unfolding of the joint trivariate distribution of size, shape factor and orientation of spheroidal particles is demonstrated using vertical uniform random sections. The formulation and solution is design-based, first the integral equations are derived, then a numerical solution is discussed. It is emphasized that under the conditional independence property of particle sections, the unfolding problem studied can be decomposed into a series of two simpler problems. The intensity NVestimator is obtained in the first step which is equivalent to the Wicksell problem of spheres. Finally an application of the results to the study of damage initiation in materials is presented.

Keywords : conditional independence, size-shape-orientation distribution, stereological unfolding, vertical sections

Om dit artikel te citeren:

Viktor Beneš & Margarita Slámová, «Multivariate unfolding problems», Acta Stereologica [En ligne], Volume 17 (1998), Number 2 - Sep. 1998, 189-199 URL :

Over : Viktor Beneš

Dept. of Mathematics FSI, Czech Technical University, Karlovo nám. 13, 12135 Prague 2, Czech Republic

Over : Margarita Slámová

Research Institute for Metals, Panenské Břežany, 25070 Odolena Voda, Czech Republic