| 摘要 |
PROBLEM TO BE SOLVED: To provide a supervisory system at a low cost, that is robust against environmental changes. SOLUTION: The supervisory system is provided with a means that enters an image in time series, a background image storage means that stores a plurality of images input, a different image storage means that calculates the difference between a plurality of background images of the background image storage means and a newly input image and stores the calculated differences, and a means that discriminates the presence of an intruded object by using the difference stored in the different image storage means. Since a plurality of background images can be automatically registered from a camera video image in an environment, where the environmental change such as an outdoor place is rapid, the robust supervisory system can be provided, which issues no wrong report, even if there are presence of the environmental changes such as shaking of trees, raining and snowfall, and reflection in a water surface. Furthermore, since a background image not in use can automatically be deleted, reduction in the detection speed and deterioration in the detection sensitivity can be prevented. |
