Image Size Range and TV Camera Separation Distances for Large Secure Areas.
Abstract
Closed circuit TV cameras frequently are outfitted with short focal length lenses to display terrain near the camera to a security guard. This method of employment causes three human factors problems: (1) usable range over which intruders are detectable and recognizable is quite short, (2) intruder images can vary greatly in size from the near to the far range, complicating intruder recognition, and (3) to cover long boundaries in large installations requires watching many TV display monitors. These problems can sometimes be eliminated by moving the near range out to a few hundred feet, using longer focal length camera lenses, and having each camera look past the net one, covering its blind zone. On long straight fences the number of cameras and the amount of associated equipment can be drastically reduced. Initial and life cycle costs of large installations can be greatly reduced while easing the monitoring task. The general case is examined and the approach is applied to the Base and Installation Security System (BISS) when it is used to protect large installations. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1982
- Accession Number
- ADA122444
Entities
People
- Herschel C. Self
Organizations
- Air Force Research Laboratory