Wavelet methods for geometry encoding is a recently emerged supenet of multiresolution analysis which has proven to be very efficient in term of compression and adaptive transmission of 3D content. The decorrelating power and spacelscale localization of wavelets enable efficient compression of arbitrary meshes as well as progressive and local reconstruction. Recent techniques based on zerowee compressiun have shown to be among the best lossy mesh compression methods, while remaining compatible with selective transmission of geometric data at various level of detail. While some progressive reconstmction schemes have been propored in the past. we show in this paper that this representation. recently proposed in the MPEG4 standard. can be efficiently used to perfom real-time. view-dependent reconstruction of large meshes. The proposed system combines algorithms for local updates. cache management and serverlclient dialog. The local details management is an improvement of progressive reconstructions built on top of hierarchical structures. It enables fast. homogeneous accommodation and suppression of wavelet coefficients at any level of subdivision. with time complexity independent of the size of the reconstructed mesh. The cache structure wisely exploits the hierarchical character of the received data. in order lo avoid redundant information transmission. The whole system enables the client to have total control on the quality of navigation according to its storage and processing capabilities. whatever the size of the mesh.
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