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© Oxford University Press

DEFPARAM: a program package for aligning elliptical sections of biological objects containing an n-fold symmetry

Patrick Nitschké , Isabelle Pignot-Paintrand 1, Francine Iftode 2 and Hervé Delacroix 3

Centre de Génétique Moléculaire, CNRS UPR 2420, associé à l'Universite P. el M. Curie 1 avenue de la Terrasse, 91198 Gif-sur-Yvelte Cedex
1DBMS-CS, INSERm U366. Centre d'Etude Nucléaire de Grenoble BP85X, 38041 Grenoble
2Université Paris XI, URA 1134, Biologie Cellulaire IV Bat. 444, 91405 Orsay Cedex, France

3To whom correspondence should be addressed

A program package has been developed to align automatically images of biological objects containing an n-fold symmetry, and to remove the distortions induced on their circular shape by the microtomy. It uses an original procedure based on correlation techniques and replaces usual manual processing. Examples of direct averaging of transverse sections of biological objects are given to illustrate the program's capabilities.

Received on March 22, 1995; accepted on July 13, 1995

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