Sparse representation for colors of 3D point cloud via virtual adaptive sampling

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)peer-review

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Detail(s)

Original languageEnglish
Title of host publication2017 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2926-2930
ISBN (Electronic)978-1-5090-4117-6
ISBN (Print)978-1-5090-4118-3
Publication statusPublished - 19 Jun 2017

Publication series

NameInternational Conference on Acoustics, Speech, and Signal Processing (ICASSP)
PublisherIEEE
ISSN (Print)1520-6149
ISSN (Electronic)2379-190X

Conference

Title2017 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)
PlaceUnited States
CityNew Orleans
Period5 - 9 March 2017

Abstract

Sparse signal representation has proven to be an extremely powerful tool in a wide range of engineering applications. However, most of the existing techniques are designed for regular data (such as audio signals and images/videos) that uniformly lies in regular Euclidian spaces. This paper aims at extending sparse representation for irregular data (such as colors of 3D point clouds) that is defined on irregular domains embedded in Euclidean spaces. Dealing with the irregular structure of such data via a virtual adaptive sampling process, we formulate sparse representation as an ℓ0-norm regularized optimization problem. Experimental results show that the proposed algorithm outperforms the state-of-the-art algorithm to a large extent: with the same number of nonzero coefficients, we improve the reconstruction quality up to 5 dB; conversely, fixing the reconstruction quality, our method uses only 55% coefficients. Using compressive sensing theory, we provide an intuitive explanation on how and why our algorithm works well in practice.

Research Area(s)

  • 3D point cloud, compression, compressive sensing, reconstruction, sparse representation, voxelization

Citation Format(s)

Sparse representation for colors of 3D point cloud via virtual adaptive sampling. / HOU, Junhui; Chau, Lap-Pui; He, Ying et al.

2017 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). Institute of Electrical and Electronics Engineers Inc., 2017. p. 2926-2930 7952692 (International Conference on Acoustics, Speech, and Signal Processing (ICASSP)).

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)peer-review