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- W46859052 abstract "A vision-based object tracking system takes live image sequences as input and determines the evolving geometric or physical properties (position, orientation, velocity, etc.) of a target object. Ideally, an object tracking system returns complete and accurate information about its target object, but ideal conditions rarely hold in the real world. For example, objects are difficult to track when moving too rapidly or when occluded by other objects. This dissertation presents work that makes vision-based object tracking robust to such circumstances.The primary contribution of this dissertation is Incremental Focus of Attention (IFA), an architecture for performing robust vision-based object tracking. IFA systems combine several visual search and visual tracking algorithms into a layered hierarchy. The architecture controls the transitions between layers and executes algorithms appropriate to the visual environment at hand: When conditions are good, tracking is accurate and precise; as conditions deteriorate, less accurate, yet more robust, algorithms take over; when tracking is lost altogether, layers cooperate to perform a rapid search for the target in order to recover tracking.Implemented IFA systems are extremely robust to most common types of temporary visual disturbances. They recover quickly after full occlusions, illumination changes, major distractions, and target disappearances. In particular, recovery times after lost tracking will be shown to depend primarily on the number of objects that are visually similar to the target in the field of view.Finally, IFA systems will be compared favorably to other methods of robust visual tracking: basic window-based tracking, tracking with adaptive subsampling, tracker fusion, and two-layer attention-based tracking. Each of these methods will be described in some detail prior to the presentation of IFA." @default.
- W46859052 created "2016-06-24" @default.
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- W46859052 date "1998-01-01" @default.
- W46859052 modified "2023-09-24" @default.
- W46859052 title "Robust vision-based object tracking" @default.
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