Virtual observers in a mobile surveillance system
Conventional wide-area video surveillance systems use a network of fixed cameras positioned close to locations of interest. We describe an alternative and flexible approach to wide area surveillance based on observation streams collected from mobile cameras mounted on buses. We allow a “virtual obse...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Conference Paper |
| Published: |
ACM Press
2006
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| Online Access: | http://hdl.handle.net/20.500.11937/20334 |
| _version_ | 1848750276937252864 |
|---|---|
| author | Greenhill, Stewart Venkatesh, Svetha |
| author2 | lara Nahrstedt |
| author_facet | lara Nahrstedt Greenhill, Stewart Venkatesh, Svetha |
| author_sort | Greenhill, Stewart |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Conventional wide-area video surveillance systems use a network of fixed cameras positioned close to locations of interest. We describe an alternative and flexible approach to wide area surveillance based on observation streams collected from mobile cameras mounted on buses. We allow a “virtual observer” to be placed anywhere within the space covered by the sensor network, and reconstruct the scene at these arbitrary points. Use of such imagery is challenging because mobile cameras have variable position and orientation, and sample a large spatial area but at low temporal resolution. Additionally, the views of any particular place are distributed across many different video streams. Addressing this problem, we present a system in which views from an arbitrary perspective can be constructed by indexing, organising, and transforming images collected from multiple streams acquired from a network of mobile cameras. Our system supports retrieval of raw images based on constraints of space, time, and geometry (eg. visibility of landmarks). It also allows the synthesis of wide-angle panoramic views in situations where the camera motion produces suitable sampling of the scene and metaphors for query and presentation that overcome the complexity of the data. |
| first_indexed | 2025-11-14T07:34:16Z |
| format | Conference Paper |
| id | curtin-20.500.11937-20334 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:34:16Z |
| publishDate | 2006 |
| publisher | ACM Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-203342023-02-27T07:34:28Z Virtual observers in a mobile surveillance system Greenhill, Stewart Venkatesh, Svetha lara Nahrstedt Matthew Turk Yong Rui Wolfgang Klas Ketan Mayer-Patel Conventional wide-area video surveillance systems use a network of fixed cameras positioned close to locations of interest. We describe an alternative and flexible approach to wide area surveillance based on observation streams collected from mobile cameras mounted on buses. We allow a “virtual observer” to be placed anywhere within the space covered by the sensor network, and reconstruct the scene at these arbitrary points. Use of such imagery is challenging because mobile cameras have variable position and orientation, and sample a large spatial area but at low temporal resolution. Additionally, the views of any particular place are distributed across many different video streams. Addressing this problem, we present a system in which views from an arbitrary perspective can be constructed by indexing, organising, and transforming images collected from multiple streams acquired from a network of mobile cameras. Our system supports retrieval of raw images based on constraints of space, time, and geometry (eg. visibility of landmarks). It also allows the synthesis of wide-angle panoramic views in situations where the camera motion produces suitable sampling of the scene and metaphors for query and presentation that overcome the complexity of the data. 2006 Conference Paper http://hdl.handle.net/20.500.11937/20334 10.1145/1180639.1180759 ACM Press restricted |
| spellingShingle | Greenhill, Stewart Venkatesh, Svetha Virtual observers in a mobile surveillance system |
| title | Virtual observers in a mobile surveillance system |
| title_full | Virtual observers in a mobile surveillance system |
| title_fullStr | Virtual observers in a mobile surveillance system |
| title_full_unstemmed | Virtual observers in a mobile surveillance system |
| title_short | Virtual observers in a mobile surveillance system |
| title_sort | virtual observers in a mobile surveillance system |
| url | http://hdl.handle.net/20.500.11937/20334 |