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Space-time interest...
Space-time interest points
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- Laptev, Ivan (författare)
- KTH,Numerisk analys och datalogi, NADA
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- Lindeberg, Tony, 1964- (författare)
- KTH,Beräkningsbiologi, CB
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(creator_code:org_t)
- IEEE conference proceedings, 2003
- 2003
- Engelska.
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Ingår i: Proceedings of Ninth IEEE International Conference on Computer Vision, 2003. - : IEEE conference proceedings. ; , s. 432-439
- Relaterad länk:
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http://www.nada.kth....
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http://ieeexplore.ie...
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https://kth.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Local image features or interest points provide compact and abstract representations of patterns in an image. We propose to extend the notion of spatial interest points into the spatio-temporal domain and show how the resulting features often reflect interesting events that can be used for a compact representation of video data as well as for its interpretation. To detect spatio-temporal events, we build on the idea of the Harris and Forstner interest point operators and detect local structures in space-time where the image values have significant local variations in both space and time. We then estimate the spatio-temporal extents of the detected events and compute their scale-invariant spatio-temporal descriptors. Using such descriptors, we classify events and construct video representation in terms of labeled space-time points. For the problem of human motion analysis, we illustrate how the proposed method allows for detection of walking people in scenes with occlusions and dynamic backgrounds.
Ämnesord
- NATURVETENSKAP -- Data- och informationsvetenskap -- Datavetenskap (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences -- Computer Sciences (hsv//eng)
- NATURVETENSKAP -- Data- och informationsvetenskap -- Datorseende och robotik (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences -- Computer Vision and Robotics (hsv//eng)
- NATURVETENSKAP -- Matematik (hsv//swe)
- NATURAL SCIENCES -- Mathematics (hsv//eng)
Nyckelord
- Acceleration
- Computer vision
- Event detection
- Image motion analysis
- Indexing
- Layout
- Motion analysis
- Optical computing
- Spatiotemporal phenomena
- Videoconference
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)