# PREDICTIVE-SPECTRAL COMPRESSION OF DYNAMIC 3D MESHES

### Rachida Amjoun, Wolfgang Straßer

#### 2007

#### Abstract

This paper proposes a new compression algorithm for dynamic 3d meshes. In such a sequence of meshes, neighboring vertices have a strong tendency to behave similarly and the degree of dependencies between their locations in two successive frames is very large which can be efficiently exploited using a combination of Predictive and DCT coders (PDCT). Our strategy gathers mesh vertices of similar motions into clusters, establish a local coordinate frame (LCF) for each cluster and encodes frame by frame and each cluster separately. The vertices of each cluster have small variation over a time relative to the LCF. Therefore, the location of each new vertex is well predicted from its location in the previous frame relative to the LCF of its cluster. The difference between the original and the predicted local coordinates are then transformed into frequency domain using DCT. The resulting DCT coefficients are quantized and compressed with entropy coding. The original sequence of meshes can be reconstructed from only a few non-zero DCT coefficients without significant loss in visual quality. Experimental results show that our strategy outperforms or comes close to other coders.

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#### Paper Citation

#### in Harvard Style

Amjoun R. and Straßer W. (2007). **PREDICTIVE-SPECTRAL COMPRESSION OF DYNAMIC 3D MESHES** . In *Proceedings of the Second International Conference on Computer Graphics Theory and Applications - Volume 2: GRAPP,* ISBN 978-972-8865-72-6, pages 30-38. DOI: 10.5220/0002081200300038

#### in Bibtex Style

@conference{grapp07,

author={Rachida Amjoun and Wolfgang Straßer},

title={PREDICTIVE-SPECTRAL COMPRESSION OF DYNAMIC 3D MESHES},

booktitle={Proceedings of the Second International Conference on Computer Graphics Theory and Applications - Volume 2: GRAPP,},

year={2007},

pages={30-38},

publisher={SciTePress},

organization={INSTICC},

doi={10.5220/0002081200300038},

isbn={978-972-8865-72-6},

}

#### in EndNote Style

TY - CONF

JO - Proceedings of the Second International Conference on Computer Graphics Theory and Applications - Volume 2: GRAPP,

TI - PREDICTIVE-SPECTRAL COMPRESSION OF DYNAMIC 3D MESHES

SN - 978-972-8865-72-6

AU - Amjoun R.

AU - Straßer W.

PY - 2007

SP - 30

EP - 38

DO - 10.5220/0002081200300038