%0 Journal Article %A Horálek, Vratislav %T A non-orthogonal projection model for evaluating photographs recording a population of spheres lying on a flat plate %J Kybernetika %D 1991 %P 393-402 %V 27 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1991__27_5_a0/ %G en %F KYB_1991__27_5_a0