发明名称 |
Perimeter surveillance system |
摘要 |
Disclosed is an automatic video intrusion detection system. The system monitors a given area such as between two parallel fences. The image of the given area is divided into an array of cells each approximately equal in size to the image of a man. The video for each cell is integrated, digitized and stored in an array. Changes in cell values are detected and tracked so that changes in, say, 3 adjacent cells in a given direction, indicate an intruder. A microcomputer implements a tracking algorithm. Filtering discriminates against light level changes. The system is simpler than a known one which analyzes grey values of thousands of points in a video field.
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申请公布号 |
US4249207(A) |
申请公布日期 |
1981.02.03 |
申请号 |
US19790097551 |
申请日期 |
1979.11.26 |
申请人 |
COMPUTING DEVICES COMPANY |
发明人 |
HARMAN, R. KEITH;PATCHELL, JOHN W. |
分类号 |
G06T7/20;G08B13/194;(IPC1-7):H04N7/18 |
主分类号 |
G06T7/20 |
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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