JPS607593A - Invasion monitor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intrusion monitoring device that monitors intrusion into a specific prohibited area such as a plant, factory, or building.

Generally, the device shown in FIG. 1 can easily be considered as this type of device. In the figure, 1 is a camera that inputs a scene to be monitored, 2 is a scene memory that holds past scene information input from camera 1 as reference information, and 3 is a scene memory that stores the contents of the scene memory 2 according to predetermined rules. 1. Scene writing control means for controlling the writing; 4 is a scene change detection means for comparing the camera output with the contents of the scene memory 2 to detect a change in the scene.

The operation of the general intrusion monitoring device shown in FIG. 1 is as follows. That is, since the scene memory 2 contains pre-recorded past scene information, for example, an image obtained by averaging past screens for a certain period of time, this is compared with the scene information of a new screen obtained from the camera 1. . This comparison process is
The scene change detection means 4 performs subtraction on the two images to remove the unchanged background scene and detect only the change. In this case, if the detected value of the change exceeds a predetermined threshold value, it is determined that some kind of intrusion has occurred. The scene writing control means 3 has a control function for rewriting the contents of the scene memory 2 in accordance with a predetermined rule. Such an intrusion monitoring device compares past scene information and new scene information, and when there is an intrusion, it is possible to detect a change in the scene information and obtain an output signal indicating that there has been an intrusion.

However, in such a general intrusion monitoring device, since the entire field of view of the camera 1 is the target area for intrusion detection, it is difficult to detect areas with complex shapes, such as areas around specific types of objects, or multiple prefecture-block areas. It is extremely difficult to selectively monitor only intrusions such as Another disadvantage is that when installing the device or changing the prohibited area, the installation conditions of the camera 1 must be finely adjusted again, which is inconvenient.

This invention was made in order to eliminate the drawbacks of the above-mentioned general ones, and in addition to the above-mentioned general intrusion monitoring function, it also has an area writing function that can selectively write a no-intrusion area in the scene. It is an object of the present invention to provide a programmable intrusion monitoring device that allows a user to arbitrarily and easily set a no-intrusion area by adding means and area memory.

An embodiment of the present invention will be described below with reference to the drawings. Second
In the figure, the same reference numerals as in FIG. 1 indicate the same or equivalent parts, so the explanation will be omitted. Further, 5 is an area writing means using, for example, a light ben or a keyboard, 6 is an area memory for storing the area written by this area writing means 5, and 7 is a change area detected by the scene change detecting means 4. area discrimination means for discriminating whether or not the area is located inside the area stored in the area memory 6; 8 is an alarm means;
9 is a scene monitor for monitoring the contents of the area memory.

Next, the operation of this embodiment will be explained. In FIG. 2, the operation of the change area detection section consisting of the camera 1, scene memory 2, scene writing control means 3, and scene change detection means 4 is similar to that of the general intrusion monitoring device explained in FIG. be. That is, the scene memory 2 has past scene information recorded in advance, and this and the scene information as a new screen obtained from the camera 1 are input to the scene change detection means 4, and the subtraction (reduction n ) to detect changes in the new image. The scene writing control means 3 is
The control operation for changing the contents of the scene map 2 to 1 according to a predetermined rule is the same as in the case of the gi diagram.

On the other hand, an entry-prohibited area is written and stored in the area memory 6 in advance via the area writing means 5. The contents of this area memory 6 are sent to the area discrimination means I as an area discrimination signal. On the other hand, the output signal from the scene change detection means 4 is applied to the region discrimination means 7, and if the output signal g of the scene change detection means 4 is included in the region indicated by the region discrimination signal, At this time, the region discrimination means I outputs an alarm output signal to drive the alarm means 8. The scene monitor 9 is for the operator to refer to the monitored scene when performing the above-mentioned area inspection.

FIG. 3 is an operational explanatory diagram for explaining more specifically the operation of the intrusion monitoring device according to the above-described embodiment of the present invention. The shaded area in FIG. 3 is a building or installation within the field of view of the camera, and the broken line area 10° to 11 in the figure indicates a prohibited area. In the intrusion monitoring device according to this embodiment, even if a person enters the field of view of the camera shown in FIG. If a person enters the area indicated by the broken line, an intrusion detection alarm output signal is generated.

If the operation of the area discriminating means 1 is set to distinguish between the prohibited area 10 and the prohibited area 11 shown in FIG. Of course, it is also possible to distinguish between cases of intrusion and generate different alarm output signals for each case.

Further, in the above embodiment, the case of intrusion monitoring has been described, but this may also be used for escape monitoring, and generally the same effect can be achieved as a monitoring device for objects entering and exiting from the boundary of a predetermined area. For example, by introducing leakage monitoring, deformation monitoring, and infrared cameras, it can be widely applied to thermal monitoring.
The concept of intrusion monitoring in the present invention includes all of these types of monitoring.

As described above, according to the intrusion monitoring device of the present invention, a prohibited area can be arbitrarily specified and written in a scene obtained by a surveillance camera, so that it is possible to specify and write a prohibited area in a scene obtained by a surveillance camera. It is possible to monitor intrusions, and the user can easily make adjustments during setup and relocation.

Furthermore, since multiple interpretation areas can be specified within the scene, work in the factory can be made more efficient and stable.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing a general intrusion monitoring device, Figure 2 is a block diagram showing a general intrusion monitoring device.
FIG. 3 is a block diagram showing an intrusion monitoring device according to an embodiment of the present invention, and FIG. 3 is an operational explanatory diagram for explaining the operation of the intrusion monitoring device according to the embodiment of FIG. Note that the same reference numerals in the figures indicate the same or equivalent parts. DESCRIPTION OF SYMBOLS 1... Camera, 2... Scenery memory, 3... Scenery writing control means, 4... Scenery change detection means, 5... Area writing means, 6... Area memory, 7. -・Area discrimination means, 8...5 information means, 9...Scene monitor, 10.11
・-・No entry area. Agent Masuo Oiwa

Claims (1)

[Claims] An intrusion is detected by a scene change detection means that records past scene information in a scene memory through a camera that inputs the scene to be monitored, and detects changes in the scene by comparing the current scene information and the past scene information. An intrusion monitoring device that monitors the human body includes an area writing means that can arbitrarily set and input an intrusion-prohibited area in the above information f and f, and a and an area memory for recording an entry-prohibited area set in advance, and a tube layer output signal is generated when a change in the IW scenery occurs within the preset entry-prohibited area. Intrusion monitoring device.