Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Graph-based compression of dynamic 3D point cloud sequences   This paper addresses the problem of compression of 3D point cloud sequences
that are characterized by moving 3D positions and color attributes. As
temporally successive point cloud frames are similar, motion estimation is key
to effective compression of these sequences. It however remains a challenging
problem as the point cloud frames have varying numbers of points without
explicit correspondence information. We represent the time-varying geometry of
these sequences with a set of graphs, and consider 3D positions and color
attributes of the points clouds as signals on the vertices of the graphs. We
then cast motion estimation as a feature matching problem between successive
graphs. The motion is estimated on a sparse set of representative vertices
using new spectral graph wavelet descriptors. A dense motion field is
eventually interpolated by solving a graph-based regularization problem. The
estimated motion is finally used for removing the temporal redundancy in the
predictive coding of the 3D positions and the color characteristics of the
point cloud sequences. Experimental results demonstrate that our method is able
to accurately estimate the motion between consecutive frames. Moreover, motion
estimation is shown to bring significant improvement in terms of the overall
compression performance of the sequence. To the best of our knowledge, this is
the first paper that exploits both the spatial correlation inside each frame
(through the graph) and the temporal correlation between the frames (through
the motion estimation) to compress the color and the geometry of 3D point cloud
sequences in an efficient way.

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The categories of this paper are: math-ph
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: funct-an
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The categories of this paper are: hep-th
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The categories of this paper are: patt-sol
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an