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Article: Object-based coding for plenoptic videos
Title | Object-based coding for plenoptic videos | ||||||
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Authors | |||||||
Keywords | IBR object coding Image-based rending MPEG-4 Object-based coding Plenoptic videos | ||||||
Issue Date | 2010 | ||||||
Publisher | IEEE | ||||||
Citation | Ieee Transactions On Circuits And Systems For Video Technology, 2010, v. 20 n. 4, p. 548-562 How to Cite? | ||||||
Abstract | A new object-based coding system for a class of dynamic image-based representations called plenoptic videos (PVs) is proposed. PVs are simplified dynamic light fields, where the videos are taken at regularly spaced locations along line segments instead of a 2-D plane. In the proposed object-based approach, objects at different depth values are segmented to improve the rendering quality. By encoding PVs at the object level, desirable functionalities such as scalability of contents, error resilience, and interactivity with an individual image-based rendering (IBR) object can be achieved. Besides supporting the coding of texture and binary shape maps for IBR objects with arbitrary shapes, the proposed system also supports the coding of grayscale alpha maps as well as depth maps (geometry information) to respectively facilitate the matting and rendering of the IBR objects. Both temporal and spatial redundancies among the streams in the PV are exploited to improve the coding performance, while avoiding excessive complexity in selective decoding of PVs to support fast rendering speed. Advanced spatial/temporal prediction methods such as global disparity-compensated prediction, as well as direct prediction and its extensions are developed. The bit allocation and rate control scheme employing a new convex optimization-based approach are also introduced. Experimental results show that considerable improvements in coding performance are obtained for both synthetic and real scenes, while supporting the stated object-based functionalities. © 2006 IEEE. | ||||||
Persistent Identifier | http://hdl.handle.net/10722/128744 | ||||||
ISSN | 2023 Impact Factor: 8.3 2023 SCImago Journal Rankings: 2.299 | ||||||
ISI Accession Number ID |
Funding Information: Manuscript received July 3, 2008; revised July 4, 2009. First version published January 29, 2010; current version published April 2, 2010. This work was supported in part by the Hong Kong Research Grant Council (RGC) and the Innovation and Technology Fund (ITF). Parts of this paper were presented at the IEEE International Conference on Image Processing, 2005 [57], and the International Symposium of Intelligent Signal Processing and Communication Systems, 2005 [58]. This paper was recommended by Associate Editor, L. Onural. | ||||||
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Ng, KT | en_HK |
dc.contributor.author | Wu, Q | en_HK |
dc.contributor.author | Chan, SC | en_HK |
dc.contributor.author | Shum, HY | en_HK |
dc.date.accessioned | 2010-11-03T07:22:37Z | - |
dc.date.available | 2010-11-03T07:22:37Z | - |
dc.date.issued | 2010 | en_HK |
dc.identifier.citation | Ieee Transactions On Circuits And Systems For Video Technology, 2010, v. 20 n. 4, p. 548-562 | en_HK |
dc.identifier.issn | 1051-8215 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/128744 | - |
dc.description.abstract | A new object-based coding system for a class of dynamic image-based representations called plenoptic videos (PVs) is proposed. PVs are simplified dynamic light fields, where the videos are taken at regularly spaced locations along line segments instead of a 2-D plane. In the proposed object-based approach, objects at different depth values are segmented to improve the rendering quality. By encoding PVs at the object level, desirable functionalities such as scalability of contents, error resilience, and interactivity with an individual image-based rendering (IBR) object can be achieved. Besides supporting the coding of texture and binary shape maps for IBR objects with arbitrary shapes, the proposed system also supports the coding of grayscale alpha maps as well as depth maps (geometry information) to respectively facilitate the matting and rendering of the IBR objects. Both temporal and spatial redundancies among the streams in the PV are exploited to improve the coding performance, while avoiding excessive complexity in selective decoding of PVs to support fast rendering speed. Advanced spatial/temporal prediction methods such as global disparity-compensated prediction, as well as direct prediction and its extensions are developed. The bit allocation and rate control scheme employing a new convex optimization-based approach are also introduced. Experimental results show that considerable improvements in coding performance are obtained for both synthetic and real scenes, while supporting the stated object-based functionalities. © 2006 IEEE. | en_HK |
dc.language | eng | - |
dc.publisher | IEEE | - |
dc.relation.ispartof | IEEE Transactions on Circuits and Systems for Video Technology | en_HK |
dc.rights | ©2010 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. | - |
dc.subject | IBR object coding | en_HK |
dc.subject | Image-based rending | en_HK |
dc.subject | MPEG-4 | en_HK |
dc.subject | Object-based coding | en_HK |
dc.subject | Plenoptic videos | en_HK |
dc.title | Object-based coding for plenoptic videos | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1051-8215&volume=20&issue=4&spage=548&epage=562&date=2010&atitle=Object-based+coding+for+plenoptic+videos | - |
dc.identifier.email | Ng, KT: wktng@hku.hk | en_HK |
dc.identifier.email | Chan, SC: ascchan@hkucc.hku.hk | en_HK |
dc.identifier.authority | Ng, KT=rp00157 | en_HK |
dc.identifier.authority | Chan, SC=rp00094 | en_HK |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1109/TCSVT.2010.2041820 | en_HK |
dc.identifier.scopus | eid_2-s2.0-77951122418 | en_HK |
dc.identifier.hkuros | 183149 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-77951122418&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 20 | en_HK |
dc.identifier.issue | 4 | en_HK |
dc.identifier.spage | 548 | en_HK |
dc.identifier.epage | 562 | en_HK |
dc.identifier.isi | WOS:000276681000008 | - |
dc.publisher.place | United States | en_HK |
dc.identifier.scopusauthorid | Ng, KT=7403178463 | en_HK |
dc.identifier.scopusauthorid | Wu, Q=52763969700 | en_HK |
dc.identifier.scopusauthorid | Chan, SC=13310287100 | en_HK |
dc.identifier.scopusauthorid | Shum, HY=7006094115 | en_HK |
dc.identifier.issnl | 1051-8215 | - |