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<p><b>Abstract</b>—This correspondence is originated by the definition of aspect given in a recent paper [<ref rid="bibi00571" type="bib">1</ref>] on the computation of aspect graphs of polyhedra. Simple examples are presented which show that the data stored according to this definition can be unsuitable for identifying an object or its attitude through a topological match. A definition is suggested which does not incur the problems pointed out.</p>
Aspect graphs, polyhedra, topological definition of aspect.

A. Laurentini, "Comments on "Efficiently Computing and Representing Aspect Graphs of Polyhedral Objects"," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 18, no. , pp. 57-58, 1996.
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