Geodesic
Filling Holes with B-spline Surfaces
Journal for geometry and graphics, Tome 6 (2002) no. 1, pp. 083-098 
M. Szilvasi-Nagy. Filling Holes with B-spline Surfaces. Journal for geometry and graphics, Tome 6 (2002) no. 1, pp. 083-098. http://geodesic.mathdoc.fr/item/JGG_2002_6_1_a6/
@article{JGG_2002_6_1_a6,
     author = {M. Szilvasi-Nagy},
     title = {Filling {Holes} with {B-spline} {Surfaces}},
     journal = {Journal for geometry and graphics},
     pages = {083--098},
     year = {2002},
     volume = {6},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/JGG_2002_6_1_a6/}
}
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Voir la notice de l'article provenant de la source Heldermann Verlag

This paper presents an algorithm for filling holes with polynomial tensor product B-spline surfaces of degree (3, 2). The B-spline surface is constructed as a tube shaped surface which is attached to the boundary of the hole at one end and is tied up in a closing point at the other end. The patches around the closing point are degenerate three-sided patches. The unknown control points and shape influencing tangent magnitudes of the B-spline surface are computed from boundary conditions and fairness criteria by minimizing appropriate energy functions.