Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/6038
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dc.contributorDepartment of Electronic and Information Engineering-
dc.creatorZhang, Y-
dc.creatorSiu, WC-
dc.creatorShen, T-
dc.date.accessioned2014-12-11T08:24:36Z-
dc.date.available2014-12-11T08:24:36Z-
dc.identifier.issn1017-9909-
dc.identifier.urihttp://hdl.handle.net/10397/6038-
dc.language.isoenen_US
dc.publisherSPIE-International Society for Optical Engineeringen_US
dc.rightsZhang Y, Siu W and Shen T, "Comprehensive scheme for subpixel variable block-size motion estimation," J. Electron. Imaging., 20(1), 013014, p. 1-20 (2011)en_US
dc.rightsCopyright 2011 Society of Photo-Optical Instrumentation Engineers & Society for Imaging Science and Technology. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.en_US
dc.rightshttp://dx.doi.org/10.1117/1.3553438en_US
dc.subjectAlgorithmsen_US
dc.subjectEstimationen_US
dc.subjectPixelsen_US
dc.subjectReal variablesen_US
dc.subjectSignal to noise ratioen_US
dc.titleComprehensive scheme for subpixel variable block-size motion estimationen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage1-
dc.identifier.epage20-
dc.identifier.volume20-
dc.identifier.issue1-
dc.identifier.doi10.1117/1.3553438-
dcterms.abstractFast variable block-size motion estimation is a key issue for real-time applications of the H.264, whereas the subpixel refinement takes up much computational time as compared to integer-pixel motion estimation. We propose a new fast subpixel precision variable block-size motion-estimation scheme. This algorithm uses the statistical information, which comes from the motion activities of the macroblocks (MBs) in the previous frame, to predict the characteristics of MBs in the current frame. Additionally, the distortion values and motion vectors of MBs in the previous frame are also considered as prior knowledge, based on which we can make decisions on early mode selection and early termination, and on whether or not to skip some candidate modes and candidate checking points. The intermediate results of subpixel motion estimation are used together with the prior knowledge to reduce subpixel search time when searching for stationary blocks. Our new directional information strategy is used in both integer-pixel motion estimation and subpixel motion estimation to accelerate the search procedure. Moreover, our algorithm can eliminate the subpixel motion estimation of all the unselected subpartition modes. The computational resources can then be spent on the modes and locations that deserve to be searched more than others. Extensive experimental is been done, the results of which show that the speed of our approach is nearly five times that of the fast algorithms in H.264 JM, with a better peak signal-to-noise ratio and better bit performance.-
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationJournal of electronic imaging, Jan 2011, v. 20, no. 1, 013014, p. 1-20-
dcterms.isPartOfJournal of electronic imaging-
dcterms.issued2011-01-
dc.identifier.isiWOS:000288893200016-
dc.identifier.scopus2-s2.0-80054806826-
dc.identifier.eissn1560-229X-
dc.identifier.rosgroupidr55518-
dc.description.ros2010-2011 > Academic research: refereed > Publication in refereed journal-
dc.description.oaVersion of Recorden_US
dc.identifier.FolderNumberOA_IR/PIRAen_US
dc.description.pubStatusPublisheden_US
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