Scalable L-Infinite Coding of Meshes

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 t...

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Veröffentlicht in:IEEE transactions on visualization and computer graphics Jg. 16; H. 3; S. 513 - 528
Hauptverfasser: Munteanu, A., Cernea, D.C., Alecu, A., Cornelis, J., Schelkens, P.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: United States IEEE 01.05.2010
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
1-CPRS
3D graphics
Algorithms
Allocations
Application software
Codecs
Coding
Computer displays
Computer Graphics
Decoding
Distortion
Encoding
Errors
Geometry
Image Interpretation, Computer-Assisted - methods
Imaging, Three-Dimensional - methods
L-2 coding
L-infinite coding
MESHGRID
MPEG 4 Standard
MPEG4-AFX
Preserves
Scalability
scalable mesh coding
Signal Processing, Computer-Assisted
Studies
Three dimensional
Upper bound
Upper bounds
User-Computer Interface
ISSN:1077-2626, 1941-0506
Online-Zugang:Volltext
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Beschreibung
Zusammenfassung: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.
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ISSN:1077-2626
1941-0506
DOI:10.1109/TVCG.2009.90