RT Journal Article
JF IEEE Transactions on Visualization & Computer Graphics
YR 2009
VO 16
SP 513
TI Scalable L-Infinite Coding of Meshes
A1 Alin Alecu,
A1 Dan C. Cernea,
A1 Adrian Munteanu,
A1 Peter Schelkens,
A1 Jan Cornelis,
K1 L-infinite coding
K1 L-2 coding
K1 scalable mesh coding
K1 3D graphics
AB The paper investigates the novel concept of local-error control in mesh geometry encoding. In contrast to traditional mesh-coding systems that use the mean-square error as target distortion metric, this paper proposes a new L-infinite mesh-coding approach, for which the target distortion metric is the L-infinite distortion. In this context, a novel wavelet-based L-infinite-constrained coding approach for meshes is proposed, which ensures that the maximum error between the vertex positions in the original and decoded meshes is lower than a given upper bound. Furthermore, the proposed system achieves scalability in L-infinite sense, that is, any decoding of the input stream will correspond to a perfectly predictable L-infinite distortion upper bound. An instantiation of the proposed L-infinite-coding approach is demonstrated for MESHGRID, which is a scalable 3D object encoding system, part of MPEG-4 AFX. In this context, the advantages of scalable L-infinite coding over L-2-oriented coding are experimentally demonstrated. One concludes that the proposed L-infinite mesh-coding approach guarantees an upper bound on the local error in the decoded mesh, it enables a fast real-time implementation of the rate allocation, and it preserves all the scalability features and animation capabilities of the employed scalable mesh codec.
PB IEEE Computer Society, [URL:http://www.computer.org]
SN 1077-2626
LA English
DO 10.1109/TVCG.2009.90
LK http://doi.ieeecomputersociety.org/10.1109/TVCG.2009.90