Double camera scene change detection system with automatic zooming and focusing
In recent years, certain experience has been gained in front-end data reduction systems using detectors together with TV cameras. One drawback of front-end reduction is the fact that once data are reduced, it is no longer possible to get more detail than that provided by the data reduction system. This paper describes a scene change detection system equipped with two TV cameras, one with a conventional wide angle lens, and the second with a motorised lens with computer controlled zoom and focus. The second camera is installed on top of a computer controlled pan-and-tilt unit. During operation, the scene change detection system analyses the images from the first camera at full frame speed to detect scene changes in zones selected by safeguards staff. Once an alarm is detected, the image from the first camera is archived. At the same time, the pan-and-tilt system aims the second camera at the point of the scene where changes have occurred. The zoom of the second camera is then activated to get a more detailed image of a specific scene region and an auto-focusing procedure is initiated. A second scene image is then acquired and archived, complementing the first scene image with the necessary details in the area of interest.
Bibliographic Reference: Paper presented: 15th ESARDA Symposium on Safeguards and Nuclear Material Management, Roma (IT), May 11-13, 1993
Availability: Available from (1) as Paper EN 37563 ORA
Record Number: 199310887 / Last updated on: 1994-11-29
Original language: en
Available languages: en