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We propose a two-stage method based on multiple distributed sensors for detection of piracy operations at sea. The proposed method is based on fusion of evidence from radar and optical sensors as well as AIS signals. The sensors are land based, air based and space based. In the first stage, a number of detectors perform recognition of low-level events, such as vessel speed, direction, size and identification...
We propose a two-stage method for detection of abnormal behaviours, such as aggression and fights in urban environment, which is applicable to operator support in surveillance applications. The proposed method is based on fusion of evidence from audio and optical sensors. In the first stage, a number of modality-specific detectors perform recognition of low-level events. Their outputs act as input...
Commonly, surveillance operators are today monitoring a large number of CCTV screens, trying to solve the complex cognitive tasks of analyzing crowd behavior and detecting threats and other abnormal behavior. Information overload is a rule rather than an exception. Moreover, CCTV footage lacks important indicators revealing certain threats, and can also in other respects be complemented by data from...
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