Method for simultaneous visual tracking of multiple bodies in a closed structured environment
US6950123B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 22, 2002 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | Dec 8, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30241
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Simultaneous tracking of multiple objects in a sequence of video frames captured by multiple cameras may be accomplished by extracting a foreground elements from a background in a frame, segmenting objects from the foreground surface, tracking objects within the frame, globally tracking positions of objects over time across multiple frames, fusing track data of objects obtained from multiple cameras to infer object positions, and resolving conflicts to estimate most likely object positions over time. Embodiments of the present invention improve substantially over existing trackers by including a technique for extraction of the region of interest that corresponds to a playing field, a technique for segmenting players from the field under varying illuminations, a template matching criteria that does not rely on specific shapes or color coherency of objects but on connected component properties, and techniques for reasoning about occlusions and consolidating tracking data from multiple cameras.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.