Selective mesh refinement

Image analysis – Image compression or coding

Reexamination Certificate

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Details

C382S240000, C382S248000

Reexamination Certificate

active

06931155

ABSTRACT:
The invention concerns a method for coding an original mesh representing a three-dimensional object, which consist in determining a simple meshing having a reduced number of defined faces each defined by vertices and edges, then coefficients in a wavelet base of a function whereof said source mesh is the image defined on said simple mesh, so as to supply successive refined meshes. The method is characterized in that each of the faces of said meshes is subdivided into a limited number of facets to form the higher level mesh, the subdivisions of said surface corresponding only to those required for observing an affinity condition of said function of said face. The invention also concerns the corresponding method for reconstructing the mesh.

REFERENCES:
patent: 6144773 (2000-11-01), Kolarov et al.
patent: 6262737 (2001-07-01), Li et al.
patent: 6314205 (2001-11-01), Masuda et al.
patent: 789 330 (1997-08-01), None
patent: WO 97/32281 (1997-02-01), None
“Efficient Triangular Surface Approximations Using Wavelets and Quadtree Data Structures”; Gross, Markus; Staadt, Oliver; Gatti, Roger; IEEE, vol. 2, No. 2; Jun. 1996; XP000637707.
“A Comparison of Mesh Simplification Algorithms”; Cignoni, P.; Monani, C.; Scopigno, R.; Comput. & Graphics, vol. 22, No. 1, pp. 37-54; 1998.
“Including shape handles in recursive subdivsion surfaces”; Brunet, P.; Computer Aided Geometric Design 5 (1988) 41-50; XP-002085289.
“Multiresolution Analysis of Arbitrary Meshes”; Eck, M.; DeRose, T.; Duchamp, T.; Hoppe, H.; Lounsberry, M.; Stuetzle, W.; Computer Graphics Proceedings, Annual Conferences Series, 1995; XP-000546226.

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