title: DEFPARAM: a program package for aligning elliptical sections of biological objects containing an n-fold symmetry.
abstract: 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.
authors.affiliation: Centre de Génétique Moléculaire, CNRS UPR 2420 associé à l'Université P. et M. Curie, Gif-sur-Yvette, France.
authors.forename: P
authors.initials: P
authors.lastname: Nitschké
authors.forename: I
authors.initials: I
authors.lastname: Pignot-Paintrand
authors.forename: F
authors.initials: F
authors.lastname: Iftode
authors.forename: H
authors.initials: H
authors.lastname: Delacroix
mesh_terms: D000465:Algorithms; D000818:Animals; D048429:Cell Size; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008297:Male; D008854:Microscopy, Electron / Q000706:statistics & numerical data; D010247:Paramecium / Q000648:ultrastructure; D012984:Software; D013082:Sperm Tail / Q000648:ultrastructure