D. Attali, P. Bertolino, and A. Montanvert, Using polyballs to approximate shapes and skeletons, Proceedings of 12th International Conference on Pattern Recognition, pp.626-628, 1994.
DOI : 10.1109/ICPR.1994.576381

[. Boissonnat and B. Geiger, <title>Three-dimensional reconstruction of complex shapes based on the Delaunay triangulation</title>, Biomedical Image Processing and Biomedical Visualization, 1992.
DOI : 10.1117/12.148710

]. J. Bli82 and . Blinn, A generalization of algebraic surface drawing, ACM Transactions on Graphics, pp.235-256, 1982.

]. Boi84 and . Boissonnat, Geometric structures for three-dimensional shape representation, ACM Trans. Graph, vol.3, issue.4, 1984.

J. Bloomenthal and K. Shoemake, Convolution surfaces, Proceedings of SIGGRAPH'91, pp.251-256, 1991.
DOI : 10.1145/127719.122757

J. Bloomenthal and B. Wyvill, Interactive techniques for implicit modeling, ACM SIGGRAPH Computer Graphics, vol.24, issue.2, pp.109-116, 1990.
DOI : 10.1145/91394.91427

I. [. Cohen and . Cohen, Deformable Models for 3D Medical Images using Finite Element and Balloons, IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'92), pp.592-598, 1992.

]. H. Del94 and . Delingette, Modélisation et reconnaissance d'objets tridimensionnels 'a l'aide de maillages simplexes, 1994.

H. Edelsbrunner and E. P. Mucke, Three-dimensional alpha shapes, Workshop on, vol.Visualization, pp.75-82, 1992.
DOI : 10.1145/147130.147153
URL : http://arxiv.org/abs/math/9410208

J. Gascuel, Fabule : un environnement de recherche pour l'animation et la simulation, Les Simulateurs,Troisì eme Séminaire du groupe de travail français Animation et Simulation, 1994.
URL : https://hal.archives-ouvertes.fr/inria-00510139

T. [. Hoppe, T. Derose, M. Duchamp, and . Halstead, Piecewise smooth surface reconstruction, Proceedings of the 21st annual conference on Computer graphics and interactive techniques , SIGGRAPH '94, pp.295-302, 1994.
DOI : 10.1145/192161.192233

T. [. Hoppe, T. Derose, J. Mcdonald, . Duchamp, and W. Stuetzle, Surface reconstruction from unorganized points, Computer Graphics (SIGGRAPH '92 Proceedings), pp.71-78, 1992.

Z. Kacic-alesic and B. Wyvill, Controlled blending of procedural implicit surfaces, Graphics Interface'91, pp.236-245, 1991.

M. Kass, A. Witkin, and D. Terzopoulos, Snakes: Active contour models, International Journal of Computer Vision, vol.5, issue.6035, pp.321-331, 1988.
DOI : 10.1007/BF00133570

E. [. Lachaud and . Bainville, A discrete adaptative model following topological modifications of volumes, Discrete Geometry for Computer Imagery, 1994.

]. F. Lei93 and . Leitner, Segmentation dynamique d'images tridimensionnelles, 1993.

. V. Mbe-+-91-]-j, D. E. Miller, . Breen, W. E. Lorensen, R. M. O-'bara et al., Geometrically deformed models: A method for extracting closed geometric models from volume data, Computer Graphics (SIGGRAPH '91 Proceedings), pp.217-226, 1991.

[. Muraki, Volumetric shape description of range data using ???Blobby Model???, ACM SIGGRAPH Computer Graphics, vol.25, issue.4, pp.227-235, 1991.
DOI : 10.1145/127719.122743

M. H. Nishimura, T. Hirai, T. Kawai, I. Kawata, K. Shirakawa et al., Objects modeling by distribution function and a method of image generation, Trans. IEICE Japan, issue.4, pp.68-718, 1985.

A. Pentland and S. Sclaroff, Generalized implicit functions for computer graphics, Computer Graphics (SIGGRAPH '91 Proceedings), pp.247-250, 1991.

N. Tsingos and M. Gascuel, Un modeleur interactif d'objets définis par des surfaces implicites, Secondes Journées de l'AFIG, 1994.

D. [. Terzopoulos and . Metaxas, Dynamic 3D models with local and global deformations: deformable superquadrics, IEEE Transactions on Pattern Analysis and Machine Intelligence, vol.13, issue.7, pp.703-714, 1991.
DOI : 10.1109/34.85659

A. [. Terzopoulos, M. Witkin, and . Kass, Constraints on deformable models:Recovering 3D shape and nonrigid motion, Artificial Intelligence, vol.36, issue.1, pp.91-123, 1988.
DOI : 10.1016/0004-3702(88)90080-X

G. Wyvill, C. Mcpheeters, and B. Wyvill, Data structure for soft objects. The Visual Computer, pp.227-234, 1986.

B. Wyvill and G. Wyvill, Field functions for implicit surfaces. The Visual Computer, pp.75-82, 1989.