Apparatus and method of monitoring moving objects
View Patent ↗A monitoring area is scanned by an area sensor device (e.g., an optical distance meter) detects objects. Moving objects are identified among the detected objects, and, among the identified moving objects, a moving object which is present in the monitoring area and which has been newest identified is set as a tracking target. The moving object which has been set at the tracking target is automatically tracked by a camera device. As a result, even if there are present a plurality of moving objects in the monitoring area, tracking targets can be switched from one to another, so that it is possible to designate, as a tracking target, a moving object desired by an observer.
1. A method of monitoring a moving object within a predetermined monitoring area, the method comprising:
detecting objects by scanning the monitoring area by an optical distance meter;
identifying moving objects among the detected objects;
setting, as a tracking target, among the identified moving objects, a moving object which is present in the monitoring area and which is newest identified; and
automatically tracking the moving object which has been set as the tracking target, by an camera apparatus,
wherein, when there are present a plurality of moving objects which are identified as being the newest,
the tracking target is set in an order of starting from a moving object located the nearest to a border of the monitoring area, and
the identified tracking target is automatically tracked, the setting and the automatically tracking being repeated for ail the identified moving objects; and
wherein, when a response time is longer than a predicted time, the response time being a period of time required to automatically track a moving object newly set as a tracking target, the predicted time being a period of time necessary for the newly set tracking target to reach a priority monitoring object which is preset in the monitoring area, a priority monitoring area including the priority monitoring object is monitored, in fixed-point monitoring, at a wide angle by using the camera device.
2. The method of claim 1 , wherein when a count showing that a tracking period becomes lower successively than a lower limit value becomes larger than a lower determination count, the same moving object being automatically tracked during the tracking period, a priority monitoring area including a priority monitoring object preset in the monitoring area is monitored, in fixed-point monitoring at a wide angle by using the camera device.
3. The method of claim 1 , wherein when a count showing that the tracking target has been switched to other tracking targets in a predetermined determination period has exceeded a predetermined upper determination count, a priority monitoring area including a priority monitoring object preset in the monitoring area is monitored, in fixed-point monitoring, at a wide angle by using the camera device.
4. The method of claim 1 , wherein when any of the moving objects in the priority monitoring area is selected during the fixed-point monitoring the priority monitoring area at the wide angle using the camera device, the selected moving object is set as the tracking target for the automatic tracking.
5. An apparatus for monitoring a moving object in a preset monitoring area, the apparatus comprising:
means for detecting objects by scanning the monitoring area using an optical distance meter;
means for identifying moving objects among the detected objects;
means for setting, as a tracking target, among the specified moving objects, a moving object which is present in the monitoring area and which is newest identified;
means for automatically tracking the moving object which is set as the tracking target being automatically tracked, by an camera apparatus;
means for automatically tracking the moving object which is set as the tracking target being automatically tracked, by the camera apparatus;
means for setting the tracking target in an order of starting from a moving object located the nearest to a border of the monitoring area for repeating automatic tracking of the tracking target so that all the tracking targets are set through the repletion, when there are present a plurality of the moving objects which are identified as being the newest; and
means for performing, using the camera device, fixed-point monitoring of a priority monitoring area including the priority monitoring object at a wide angle, when a response time is longer than a predicted time, the response time being a period of time required to automatically track a moving object newly set as a tracking target, the predicted time being a period of time necessary for the newly set tracking target to reach a priority monitoring object which is preset in the monitoring area.