Monitoring system

Abstract

To perform detection of shaking such as an earthquake using a picture obtained by imaging an observation point using a camera, while reducing an influence caused by shaking and movement of the camera itself on the shake detection.SOLUTION: A monitoring system comprises: a first mark (L1) fixed at a predetermined position of a space at an observation point; a second mark (L2) added to a measurement object T arranged in the space at the observation point; a camera 10(C) for imaging the space at the observation point; and a picture processing device 20 for analyzing the imaged picture received from the camera 10(C). The picture processing device 20 detects movement of the measurement object T on the basis of a change in positional relation between the first mark (L1) and the second mark (L2) in the imaged picture by the camera 10(C).SELECTED DRAWING: Figure 2

Claims

1. A monitoring system for detecting tremors such as earthquakes at observation points, A first marker fixed at a predetermined position in the space of the observation site, A second marker attached to an object placed in the aforementioned space, The system includes multiple cameras for photographing the aforementioned space, A monitoring system characterized by obtaining the position of each marker in a three-dimensional coordinate system using images captured by the aforementioned multiple cameras, calculating the distance between the first marker and the second marker in the three-dimensional coordinate system for each predetermined frame, detecting the movement of the object by comparing the distance calculated in the current frame with the distance calculated in the previous frame, and determining whether or not shaking such as an earthquake is occurring at the observation point.

2. In the monitoring system described in claim 1, A monitoring system characterized by detecting camera shake based on changes in the position of the first marker in the captured image.

3. In the monitoring system described in claim 1, A monitoring system characterized by calculating the velocity and acceleration of an object based on the change in the distance between the first marker and the second marker in the captured image.

4. In the monitoring system according to any one of claims 1 to 3, A monitoring system characterized by using LED lights as the first and second markers.

Images