JP2010232968A - Monitoring device provided with image pickup device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a monitoring device which is provided with an image pickup device that can instantaneously and surely determine abnormalities of changes in the movement during circulation monitoring, by comparing the last screen on the previous movement detection screen at the same imaging position with the present initial movement detection screen, after a single circulation monitoring and by detecting the change. <P>SOLUTION: The image pickup device that detects the movement of a screen, while repeating circulation monitoring and detects the movement by comparing the previous monitoring screen with the present screen at each imaging position. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a monitoring device provided with an imaging device, and more particularly to a monitoring device that detects movement of an image obtained by patrol monitoring.

  Monitoring that monitors the movement of an object by patroling multiple monitoring locations while panning (azimuth changing), tilting (tilting angle changing), and zooming (viewing angle change) as the imaging direction of one imaging device, that is, the imaging position. The device is widely used.

  The imaging apparatus disclosed in Japanese Patent Application Laid-Open No. 2006-174036 moves the imaging direction of the camera to an imaging position and stops at that position, and detects a motion from continuously obtained image frames. Although the frames of the image are arranged in the order of time as a moving image is formed, the motion is detected by comparing two consecutive frames of the image.

  Such an imaging apparatus may miss an abnormality such as movement of a vehicle or abandoned object during patrol monitoring. For example, if there was no vehicle when the previous image was captured at the monitoring position, but the vehicle was parked during patrol monitoring, and then the vehicle was already parked after returning to the monitoring position, the above In the imaging apparatus disclosed in Japanese Patent Application Laid-Open No. 2006-174036, since the past image is acquired and the difference is obtained after moving to the imaging position, an abnormality such as a change in movement (the vehicle is parked) is instantaneously detected. It cannot be detected.

  As described above, in the conventional imaging apparatus, there is a fear that an abnormality may be overlooked when a plurality of monitoring places are cyclically monitored to detect a motion.

JP 2006-174036 A, paragraph 0019, paragraph 0058, FIG. 2, FIG.

  The present invention has been made in view of the above points, and the object of the present invention is the last screen on the previous motion detection screen at the same imaging position, and the first this time after one round of monitoring thereafter. It is intended to provide a monitoring device including an imaging device that can instantaneously and reliably determine an abnormality called a change in motion during cyclic monitoring by comparing the motion detection screen with a motion detection screen and detecting the change. .

  The monitoring apparatus provided with the imaging device of the present invention includes: an imaging unit; a pan head unit that sets an imaging direction of the imaging unit; and data stored in association with a plurality of imaging positions set by the pan head unit. Based on the control means for driving the pan head means, the past image storage means for storing the image obtained by the imaging means as a past image, the current image currently taken by the imaging means, and the past image storage means. A motion detection unit that detects a motion of the imaging target by comparing the previous images, and a past image stored in association with the imaging position at the end of the operation of the motion detection unit. Past image updating means for updating with an image picked up sometimes, and when the motion detecting means detects a motion, a signal indicating that there is motion is output.

  In the monitoring apparatus provided with the imaging device, a signal indicating no motion is output when the motion detection means does not detect motion.

  In the monitoring device including each of the imaging devices, a current image signal currently captured by the imaging unit is output.

  The monitoring device including each of the imaging devices may further include a zoom unit that adjusts an angle of view captured by the imaging unit, and the control unit relates to an imaging position when the current image is captured by the imaging unit. The zoom means is driven based on the stored view angle data.

  Further, the monitoring device including each of the imaging devices includes rewriting means for rewriting data stored in association with a plurality of imaging positions.

  According to the monitoring apparatus of the present invention, the last screen on the previous motion detection screen at the same imaging position is compared with the current first motion detection screen after one round of monitoring thereafter, and the change is detected. By doing so, it is possible to instantaneously and reliably determine an abnormality such as a change in movement during patrol monitoring.

It is a block diagram which shows the structure of the monitoring apparatus provided with the imaging device which is Example 1 of this invention. It is a flowchart which shows the effect | action of the monitoring apparatus. It is a table | surface which shows the table memorize | stored in the monitoring apparatus. It is a figure which shows the area of the data memorize | stored in the memory of the monitoring apparatus.

  Hereinafter, modes for carrying out the present invention will be described with reference to examples.

  FIG. 1 is a block diagram illustrating a configuration of a monitoring apparatus including an imaging apparatus that is Embodiment 1 of the present invention. A lens 101 shown in FIG. 1 forms an image of light reflected from an imaging target on an imaging device (CCD) of the imaging unit 102. The lens 101 is moved by the zoom unit M so that the angle of view formed on the CCD of the imaging unit 102 can be changed.

  The control unit (CPU) 105 has a signal input / output interface and a drive unit. By executing a program recorded in the memory (MEM) 104, the zoom unit M, pan head 108, and digital The signal processing unit (DSP) 103 is controlled, signals are input / output to / from the digital signal processing unit 103, and signals are output to a monitor or the like disposed in the monitoring room via the motion detection output unit 106.

  The lens 101, the zoom unit M, the imaging unit 102, the digital signal processing unit 103, the memory 104, the control unit 105, the motion detection output unit 106, and the video signal output unit 107 constitute an imaging apparatus and are held on the camera platform 108. Has been. The pan / tilt head 108 performs pan / tilt of the imaging apparatus. The memory 104 includes a ROM, a RAM, and a nonvolatile memory such as a battery backup memory and a flash memory. The memory 104 stores the data of the table shown in FIG. 3 and the data related to the imaging position shown in FIG. The control unit 105 is operated by the written program.

  The image formed on the imaging unit 102 by the lens 101 is photoelectrically converted by the CCD of the imaging unit 102 and further input to the digital signal processing unit 103 to generate a video signal. The video signal generated by the digital signal processing unit 103 is output to the control unit 105 and is compared with the past image signal in the memory 104 obtained through the control unit 105.

  The digital signal processing unit 103 outputs the video signal to the video signal output unit 107 via the control unit 105, and detects the movement of the imaging target by comparing the video signal and the past image signal. Then, a motion detection signal is output to the motion detection output unit 106.

  Data related to the imaging position for patrol monitoring around the place where the above-described imaging device is installed is stored in the memory 104 as a table shown in FIG. The stored data shown in FIG. 3 will be described. The pan angle, tilt angle, zoom magnification, and stop time (s: seconds) are stored as data related to the positions 01 to 05, respectively.

  The memory 104 also stores past images at positions 01 to 05 in the areas (P1 to P4) 401 to 405 shown in FIG. 4, and a first threshold value and area to be described later in the area (TH1) 406. (TH2) 407 stores a second threshold value to be described later. The area (TA) 408 stores the data of the table described in FIG.

  The motion detection in the digital signal processing unit 103 is performed by dividing the entire screen to be compared into blocks and comparing the difference calculated for each block with a first threshold value.

  The patrol monitoring operation will be described below with reference to the flowchart of FIG. In the tour monitoring operation, first, in step S201, the position data to be imaged from the table data stored in the area 408 of the memory 104 (initially data of position 01, pan angle 10 °, tilt angle 5 °, zoom (8x magnification) is read and the process proceeds to step S202.

  In step S202, the pan drive motor and tilt drive motor of the camera platform 108 are driven based on the read data, and the motor that drives the zoom unit M of the lens 101 is driven.

  After completion of driving of the camera platform 108 and the zoom unit M, after waiting for a time for the camera position to stabilize, for example, 0.5 seconds, by comparing the current captured image with the past image of the current position, The motion detection routine in step S203 and subsequent steps is executed.

  Therefore, in the first round after the start of monitoring, it is determined that the past image is not recorded by determining whether the past image of this position is stored in the memory at the time of execution of step S203. In step S213, the current image is stored in the memory and the past image at this position is stored.

  If it is determined in step S203 that the past image is stored, the process proceeds to step S204. In step S204, the current image and the past image stored in the memory at this position are divided into the same state, and an image difference (such as an average deviation of the contour line) is calculated between the corresponding divided blocks. In step S205, it is determined whether the image difference is larger than a first threshold value.

  If it is determined in step S205 that the image difference is larger than the first threshold value, the process proceeds to step S206, and this block is assumed to be changed. In step S207, the number of changed blocks is up-counted, and the process proceeds to step S209.

  If it is determined in step S205 that the image difference is not greater than the first threshold value, the process proceeds to step S208, the block is unchanged, and the process proceeds to step S209. In step S209, it is determined whether the processing for the image differences of all the blocks of the image has been completed. If the processing has not been completed, the steps after step S204 are repeated with the image difference calculation target as the next block.

  If it is determined in step S209 that the processing for the image differences of all the blocks of the image has been completed, the process proceeds to step S210, and the number of blocks counted as having changed in step S207 is compared with the second threshold value.

  If it is determined in step S210 that the number of blocks that have changed is greater than the second threshold value, the process proceeds to step S212, a signal with motion is output from the motion detection output unit 106, and then the process proceeds to step S213. In this case, the current captured image may be output from the video signal output unit 107 at the same time, or the current captured image signal may be output from the video signal output unit 107 at all times.

  If it is determined in step S210 that the number of blocks that have changed is smaller than the second threshold, it is determined that there is no change, noise, disturbance, or the like, and the process proceeds to step S211 to output a motionless signal as a motion detection output unit. Then, the process proceeds to step S213.

  In step S213, the current image is overwritten and saved on the past image (regions 401 to 405) at the current position, and the motion detection process at this position is completed. Next, the process proceeds to step S214, where it is determined whether or not the stop time of this position (stop time in FIG. 3) has passed. Repeat the position motion detection process.

  If it is determined in step 214 that the stop time of this position has elapsed, the image pickup position is set as the next image pickup position, and step S201 and subsequent steps at the next image pickup position (after the last image pickup position becomes the first image pickup position). The motion detection process is executed. In this way, while performing motion detection using past images at each imaging position, patrol monitoring after the second round is continued.

  In the above patrol monitoring, since the previous captured image and the current captured image are compared at each imaging position, the vehicle is parked during the patrol monitoring, and the vehicle is already parked when returning to the monitoring position next time. Even in such a case, it is possible to accurately detect a change in movement during patrol monitoring in a short time and reliably recognize an abnormality.

  The embodiment is configured as described above, but the invention is not limited to this. For example, an operation unit such as a cross key or a determination key or a display is provided to rewrite the imaging position and related data. Good.

  In this case, a mode different from the mode for executing the routine shown in FIG. 2 is selected, and the imaging position and related data are rewritten by a known means. In this way, it is possible to easily make the imaging condition and the motion detection condition optimal for the environment where they are arranged.

  For example, it is preferable that the user can set the second threshold value according to the installation state of the motion detection object and its background.

  The monitoring device provided with the imaging device of the present invention includes the last screen on the previous motion detection screen at the same imaging position and the first motion detection screen of this time after one round of ring monitoring thereafter in the tour monitoring. In comparison, by detecting the change, it is possible to instantaneously and reliably determine anomalies such as changes in movement during cyclic monitoring, so that changes in movement during cyclic monitoring can be accurately performed in a short time. It is possible to reliably recognize an abnormality by detecting with.

  Therefore, by using a public line or the like, even when there are a large number of monitoring places such as parking lots, entrances of offices and factories in a wide area, it is possible to monitor at one place and improve the work of the security company.

DESCRIPTION OF SYMBOLS 101 Lens 102 Image pick-up part 103 Digital signal processing part 104 Memory 105 Control part 106 Motion detection output part 107 Video signal output part 108 Pan head

Claims (5)

Imaging means;
A platform means for setting an imaging direction of the imaging means;
Control means for driving the camera platform means based on data stored in association with a plurality of imaging positions set by the camera platform means;
Past image storage means for storing an image obtained by the imaging means as a past image;
A motion detection means for detecting a motion of an imaging target by comparing a current image currently captured by the imaging means with a previous image stored in the past image storage means;
Past image update means for updating a past image stored in association with the imaging position at the end of the operation of the motion detection means with an image captured at the end of the operation of the motion detection means, and the motion detection means A monitoring apparatus provided with an imaging device, characterized in that when movement is detected, a signal indicating movement is output. 2. A monitoring device comprising an imaging device according to claim 1, wherein when the motion detection means does not detect motion, a signal indicating no motion is output. The monitoring apparatus provided with the imaging device according to claim 1, wherein a current image signal currently captured by the imaging unit is output. Zoom means for adjusting an angle of view captured by the imaging means;
4. The imaging apparatus according to claim 1, wherein when the current image is captured by the imaging unit, the control unit drives the zoom unit based on field angle data stored in association with an imaging position. 5. Equipped with a monitoring device. The monitoring apparatus provided with the imaging device in any one of Claim 1 to 4 provided with the rewriting means which rewrites the data memorize | stored in relation to the several imaging position.

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