发明名称 |
Unusual event detection using motion activity descriptors |
摘要 |
A method detects an unusual event in a video. Motion vectors are extracted from each frame in a video acquired by a camera of a scene. Zero run-length parameters are determined for each frame from the motion vectors. The zero run-length parameters are summed over predetermined time intervals of the video, and a distance is determined between the sum of the zero run-lengths of a current time interval and the sum of the zero run-lengths of a previous time interval. Then, the unusual event is detected if the distance is greater than a predetermined threshold.
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申请公布号 |
US2003095602(A1) |
申请公布日期 |
2003.05.22 |
申请号 |
US20010997497 |
申请日期 |
2001.11.19 |
申请人 |
DIVAKARAN AJAY;RADHAKRISHNAN REGUNATHAN |
发明人 |
DIVAKARAN AJAY;RADHAKRISHNAN REGUNATHAN |
分类号 |
G06T1/00;G06T7/20;G08B13/196;H04N7/18;H04N7/26;H04N7/36;(IPC1-7):H04N7/12 |
主分类号 |
G06T1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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