Beyn’s algorithm for solving nonlinear eigenvalue problems is given a new interpretation and a variant is designed in which the required information is extracted via the canonical polyadic decomposition of a Hankel tensor. A numerical example shows that the choice of the filter function is very important, particularly with respect to where it is positioned in the complex plane.

A standard method of simplifying the task of obtaining a shaded image of a solid object is to represent it by a collection of surface patches or a polyhedron. A smooth shading technique is then applied to each patch/facet to restore smoothness to the image. This paper introduces an entirely new approach to surface representation: the use of isoluminance contours to represent CSG-type primitive ...

A divide and conquer strategy in the deformable contour method is presented. An initial inside closed contour is divided into segments, and these segments are allowed to deform separately preserving segments’ connectivity. A deformable contour algorithm is adapted to each contour segment movement. A maximum area threshold, A,,,, is used to stop these outward contour segment marchings. Clear and...