JP4054859B2 - Motion monitoring device - Google Patents

Description

  This invention uses one swing camera installed in a bookstore or a store for both automatic tracking of moving objects and tracking of manual operation in the surveillance area, and crimes such as shoplifting acts by the threat of the former automatic tracking. The present invention relates to a moving object monitoring apparatus capable of collecting video evidence of shoplifting addicts and the like by the latter manual operation tracking.

  The present applicant has disclosed a moving body image monitoring apparatus that tracks and images the behavior of a suspicious person (Patent Document 1). In other words, this conventional device automatically controls a CCD camera with an electric pan head and an electric zoom lens to track a moving object such as a person before entering the monitoring area, and stops in the monitoring area. Even if it exists, since the skin color is zoomed up to this as a detection element, the person can be specified from the face. Thereby, if this conventional apparatus is installed in a bookstore, a store, etc., a shoplifting action can be found and the action can be performed together with identification of a person.

  On the other hand, as a more classic criminal act monitoring method, a surveillance camera is installed in a store etc., and a surveillance person constantly monitors the imaging of the camera from a separate monitor room to detect criminal acts. The person in charge is specified by the monitor.

JP 2003-219225 A

  Any of the above conventional monitoring devices or methods has a camera installed in a relatively conspicuous place in the store. There is a certain effect to suppress. However, although the former device has an imaging recording function, of course, it is difficult to accurately determine the suspicious activity on the device side even though the recording is efficient only when there is a suspicious activity. In particular, it is extremely difficult to discriminate the skillful acts of shoplifting regular offenders.

  In this regard, the latter method in which the observer constantly monitors the site can identify criminal activities more accurately, but the burden on the observer is large and it is difficult to monitor physically at all times, It is inevitable that crimes such as shoplifting will be executed during the blank time.

  Therefore, the present invention has been made for the purpose of providing a moving object monitoring apparatus that can prevent crimes and collect field evidence by recording the evidence video even if a crime is committed. Is.

In order to achieve the above object, the present invention comprises a camera that captures a certain monitoring area, a pan that tilts the camera, a monitor that displays a video signal of the camera, and a switching device. An image signal from the camera is captured, a difference comparison is performed with the immediately preceding frame data, and if a difference is detected, an automatic tracking mode for controlling the pan head to track the coordinates corresponding to the difference is connected to the pan head. A manual operation monitoring mode in which pan / tilt control of the pan head is remotely operated by an actuator , and the switching device is configured to switch between the automatic tracking mode and the manual operation monitoring mode. In the mode, when the idle state continues for a certain period of time, a means for automatically switching to the other mode was used. Note that the video signal of the camera can be arbitrarily recorded in any mode.

  Further, the camera includes a zoom lens, and means for controlling the zoom lens by an actuator in the manual operation monitoring mode is used.

  Furthermore, in the automatic tracking mode, while tracking the coordinates corresponding to the difference, a specific color predetermined in order to further zoom up the difference image to the full frame is detected, and if this color is detected, the zoom lens The means of controlling is used.

  As described above, the present invention includes a camera that captures a certain monitoring area and a pan / tilt head that pans and tilts the camera, captures an image signal from the camera, and performs a difference comparison with the immediately preceding frame data. , If a difference is detected, an automatic tracking mode for controlling a pan head to track coordinates corresponding to the difference, and a manual operation connected to the pan head and remotely controlling pan / tilt control of the pan head by an actuator Since it is configured to be able to switch between both modes, the camera is swung to track the movement of moving objects in the automatic tracking mode, and the threat can prevent crime from occurring and manual operation Since the criminal act can be confirmed with the human eye through the monitor in the monitoring mode, the safety measures can be taken thoroughly.

  In addition, since the camera can be zoomed up in any mode, it is possible to obtain detailed information regarding the moving object.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a configuration used to achieve the present invention, wherein 1 is a zoom lens capable of continuously changing a focal length, 2 is an electric pan head that can perform electric pan / tilt, It is a CCD for converting an image captured by the zoom lens 1 into a video signal. A certain area is monitored by these configurations, and when a moving object enters the monitoring area, this is tracked by the electric camera platform 2, The moving object is zoomed in and out by operating the zoom lens 1.

  Reference numeral 4 denotes a joystick-type actuator for controlling the zoom lens 1 and the electric camera platform 2 respectively. The monitor or the like checks the image from the CCD 3 through the monitor 5 and manually operates the zoom lens 1 and the electric camera platform by remote control. 2 is appropriately controlled. That is, the actuator 4 forms a manual operation monitoring mode.

  On the other hand, a frame grabber 6 for taking in a video signal converted by the CCD 3 and selectively transmitting the signal to a subsequent memory is provided in an equivalent parallel manner. 6 is a frame memory for receiving and storing one frame of video signals selectively transmitted alternately from 6; Reference numeral 8 denotes a CPU, which recognizes an image sent from the frame memory 7A or 7B, further sends a signal for controlling the zoom lens 1 and the electric camera platform 2, and is obtained by controlling them. The whole body image of the moving object, the image after zooming in, and the like are temporarily stored and sent to the image database 9. The automatic configuration mode in the monitoring area is configured by the hardware configuration described here, and the pan head 2 is panned and tilted so that the person who has entered the monitoring area is positioned at the center of the image, and the person walks. In order to keep the person in the center of the CCD 3, the pan head 2 is further panned and tilted to be tracked. Since the operation and action in this automatic tracking mode are known in the above-mentioned patent document 1, detailed description is omitted here.

  In this embodiment, the manual operation monitoring mode and the automatic tracking mode are appropriately switched by the switching device 10 that is configured upstream of the actuator 4 and the CPU 8. This switching operation may be a manual operation of the switching device 10, or the operating time of each mode is measured, and when it is in an idle state for a certain period of time, it is automatically switched to another mode. The switching timing and operation method are arbitrary.

  FIG. 2 is a flowchart of the above moving object monitoring apparatus. First, all hardware is turned on by turning on the main power (entry of step 1). Then, the state of the switching device 10 is determined to determine whether it is in the automatic tracking mode (step 2), and if it is in the automatic tracking mode, detection of moving objects is attempted by the image sensor set in the specific area by the hardware configuration described above. . Next, if a moving object is detected, the difference between the image signals is processed, and the electric pan head 2 is pan / tilt controlled so that the moving object is located in the center of the screen (swing control of the CCD 3). Tracking is performed (step 3). Then, the measurement of the tracking time is started, and it is determined whether or not the arbitrarily set time has elapsed (step 4). If the tracking time is less than the set time, the process returns to step 3 to return to the automatic tracking mode. If the tracking time exceeds the set time, the process returns to step 2 to determine the state of the switching device 10 again to determine which mode to shift to.

  On the other hand, although this apparatus operates on the basis of the above-described automatic tracking mode, the operation when the switching apparatus 10 switches to the manual operation monitoring mode will be described. That is, when the switching device 10 is not in the automatic tracking mode in step 2, the mode is shifted to the manual operation monitoring mode. Thereafter, the monitor or the like operates the actuator 4 while looking at the monitor 5, and the zoom lens 1 or the electric camera platform 2 is moved. Remote control is performed (step 5). And it is also possible to record the video image | photographed suitably on appropriate storage devices (a video tape, a hard disk, CD, DVD, etc.). This recording operation can be performed by the actuator 4, or a storage device can be connected to the monitor 5 and the storage device can be operated separately.

  FIG. 3 shows a detailed operation flow in the manual monitoring operation mode, and shows an example of determining the operation state of the actuator 4 from steps 1 to 8. That is, in this example, the operating state of the actuator 4 is related to zoom (steps 1 and 2), related to pan / tilt (steps 3 and 4), related to elevation (steps 5 and 6), and related to recording. There are two types of detection (step 7) and those related to the end of the manual operation mode (step 8). The operation state is executed by appropriately transmitting a corresponding command via the camera control unit.

  The manual operation monitoring mode can be continued for an arbitrary time, but if a moving object such as a person is not projected on the monitor, the mode can be manually terminated (step 6 in FIG. 2). If the end of the manual operation monitoring mode is detected, the process returns to step 2, and thereafter the above-described operation is repeated.

Explanatory drawing which showed an example of the hardware constitutions which implement this invention Flow chart showing the system flow of the present invention Flow chart showing operation in manual operation monitoring mode

Explanation of symbols

1 Zoom lens 2 Electric pan head 3 CCD
4 Joystick type actuator 5 Monitor 6 Frame grabber 7A, 7B Frame memory 8 CPU
9 Image database 10 Mode switching device

Claims (3)

It consists of a camera that captures a certain monitoring area, a pan that tilts and tilts the camera, a monitor that displays the video signal of the camera, and a switching device. When the difference is compared with the data and the difference is detected, an automatic tracking mode for controlling the camera platform to track the coordinates corresponding to the difference is connected to the camera platform, and the pan / tilt control of the camera platform is controlled by the actuator. A manual operation monitoring mode that is remotely operated by the switching device , wherein the switching device is configured to switch between the automatic tracking mode and the manual operation monitoring mode, and the switching device is in a case where the idle state continues for a certain period of time in each mode. A moving object monitoring device that automatically switches to the other mode . The moving object monitoring apparatus according to claim 1, wherein the camera includes a zoom lens, and the zoom lens is controlled by an actuator in a manual operation monitoring mode. In automatic tracking mode, while tracking the coordinates corresponding to the difference, a specific color is detected in advance to zoom up the difference image to the full frame, and when this color is detected, the zoom lens is controlled. The moving body monitoring device according to claim 2.

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