This paper addresses the problem of applying powerful pattern recognition algorithms based on kernels to ef\ufb01cient visual tracking. Recently Avidan [1] has shown that object recognizers using kernel-SVMs can be elegantly adapted to localization by means of spatial perturbation of the SVM, using optic \ufb02ow. Whereas Avidan\u2019s SVM applies to each frame of a video independently of other frames, the bene\ufb01ts of temporal fusion of data are well known. This issue is addressed here by using a fully probabilistic \u2018Relevance Vector Machine\u2019 (RVM) to generate observations with Gaussian distributions that can be fused over time. To improve performance further, rather than adapting a recognizer, we build a localizer directly using the regression form of the RVM. A classi\ufb01cation SVM is used in tandem, for object veri\ufb01cation, and this provides the capability of automatic initialization and recovery. The approach is demonstrated in real-time face and vehicle tracking systems. The \u2018sparsity\u2019 of the RVMs means that only a fraction of CPU time is required to track at frame rate. Tracker output is demonstrated in a camera management task in which zoom and pan are controlled in response to speaker\/vehicle position and orientation, over an extended period. The advantages of temporal fusion in this system are demonstrated<\/p>\n","protected":false},"excerpt":{"rendered":"
This paper addresses the problem of applying powerful pattern recognition algorithms based on kernels to ef\ufb01cient visual tracking. Recently Avidan [1] has shown that object recognizers using kernel-SVMs can be elegantly adapted to localization by means of spatial perturbation of the SVM, using optic \ufb02ow. Whereas Avidan\u2019s SVM applies to each frame of a video […]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","msr-author-ordering":[{"type":"text","value":"Oliver Williams"},{"type":"user_nicename","value":"ablake"},{"type":"text","value":"Roberto Cipolla"}],"msr_publishername":"","msr_publisher_other":"","msr_booktitle":"Proc. Int. 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