Surveillance apparatus and recording medium recorded surveillance program
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 28, 2004
Grant Date -
Aug 2, 2001
app pub date -
Dec 22, 2000
filing date -
Dec 27, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An economical surveillance apparatus robust to an environmental change includes an input unit for inputting images in a time series, a background image memory unit for storing a plurality of input images, a difference image memory unit for calculating and storing difference degree between a plurality of background images of the background image memory unit and an image inputted afresh, and a judging unit for judging an existence/absence of an invading object by utilizing the value of the difference degree of the difference image memory unit. This surveillance apparatus can automatically register a plurality of background images from a camera image. Since the background images that are no longer used are automatically erased, the drop of detection speed and detection sensitivity can be prevented.
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