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		<doi>10.1109/SIBGRAPI.2009.46</doi>
		<citationkey>Ristivojevi&#263Konr:2009:MuMoDe</citationkey>
		<title>Multi-frame motion detection for active/unstable cameras</title>
		<format>Printed, On-line.</format>
		<year>2009</year>
		<numberoffiles>1</numberoffiles>
		<size>174 KiB</size>
		<author>Ristivojevi&#263, Mirko,</author>
		<author>Konrad, Janusz,</author>
		<affiliation>Intellivid Corp.</affiliation>
		<affiliation>Boston University</affiliation>
		<editor>Nonato, Luis Gustavo,</editor>
		<editor>Scharcanski, Jacob,</editor>
		<e-mailaddress>jkonrad@bu.edu</e-mailaddress>
		<conferencename>Brazilian Symposium on Computer Graphics and Image Processing, 22 (SIBGRAPI)</conferencename>
		<conferencelocation>Rio de Janeiro, RJ, Brazil</conferencelocation>
		<date>11-14 Oct. 2009</date>
		<publisher>IEEE Computer Society</publisher>
		<publisheraddress>Los Alamitos</publisheraddress>
		<booktitle>Proceedings</booktitle>
		<tertiarytype>Full Paper</tertiarytype>
		<transferableflag>1</transferableflag>
		<versiontype>finaldraft</versiontype>
		<keywords>motion detection, multi-frame video analysis, level sets, affine motion.</keywords>
		<abstract>Network cameras, extensively used in video surveillance, often allow pan-tilt-zoom functionality and are also subject to wind load and mount vibrations, thus causing video frame misalignment. Although algorithms for motion detection, a basic block of most visual surveillance systems, are relatively mature for fixed cameras, they usually perform poorly for active and/or vibrating cameras. The issue is particularly severe for algorithms using multiple video frames jointly. In this paper, we extend our earlier work on multiple-frame motion detection to the case of active and unstable cameras. Our method accounts for spatially-affine, inter-frame transformations that can vary in time, uses a variational formulation and applies a level-set solution.  We present ground-truth and real-data experimental results and show significant improvements over earlier methods. .</abstract>
		<language>en</language>
		<targetfile>PID950239_final_submission.pdf</targetfile>
		<usergroup>jkonrad@bu.edu</usergroup>
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