JP4286100B2 - Intrusion monitoring system - Google Patents

Description

  The present invention relates to an intrusion monitoring system, and more particularly to an intrusion monitoring system that performs intrusion detection.

  In recent years, the importance of video monitoring technology such as traffic monitoring, intruder monitoring, and disaster monitoring has increased, and the realization of a high-performance video intrusion monitoring system is strongly desired. In the video intrusion monitoring system, a moving image captured by a camera is input, address information is added to the image data to generate a packet, and the packet is transferred to an MPU (Micro Processing Unit) via a bus. The MPU analyzes the transferred packet and performs processing such as object detection.

As a conventional video monitoring technique, a technique has been proposed in which, when a captured image of a moving object comes into contact with a sensor, the sensor operates to sound an alarm (for example, Patent Document 1).
Japanese Patent Laid-Open No. 4-68990 (pages 2 to 3, FIG. 1)

  In the video intrusion monitoring system, when high-precision detection is performed, a high-resolution camera (1280 (H) × 1024 (V), 1024 (H) × 768 (V), H: number of horizontal effective pixels, V: It is conceivable to improve the recognition accuracy by using a vertical effective pixel number) and widening the angle of view.

  However, in a moving image captured by a high-resolution camera, the amount of data for one frame increases. Therefore, if the bus for transferring to the MPU is not fast, it cannot be transferred within the time of one frame. It becomes impossible to process. Even if the bus can be transferred within the time of one frame, if the processing capability of the MPU is low, the detection processing will not be in time, and if a higher speed bus and a higher performance MPU are installed, the cost will be reduced. The problem that it is considerably disadvantageous comes out.

  The present invention has been made in view of these points, and an object thereof is to provide an intrusion monitoring system that performs intrusion detection at an early stage without requiring an MPU that performs high-speed processing.

  In the present invention, in order to solve the above problems, in an intrusion monitoring system 1 that performs intrusion detection as shown in FIG. 1, a camera 10 that monitors and captures a specific area, and a frame of an image input from the camera 10 are accumulated. A frame buffer 21 that generates an interrupt signal when accumulation of one frame is completed, and an address generation start instruction that outputs an address generation start instruction for reading image data from the frame buffer 21 when the interrupt signal is received The output unit 22a generates an address data based on an address generation start instruction, an address generation unit 22b that reads the image data from the frame buffer 21, and a packet generation unit that packetizes and transfers the read image data and the address data. 22c, and packet transfer based on the appearance characteristics of the intruding object. An intrusion monitoring system 1 comprising: an image sensor device 20 comprising: a packet transfer control unit 22 that performs control; and a detection control unit 23 that analyzes the transferred packet and detects an intruding object. Is provided.

  Here, the camera 10 monitors and captures a specific area. The frame buffer 21 accumulates frames of an image input from the camera 10 and generates an interrupt signal when the accumulation of one frame is completed. The address generation start instruction output unit 22a outputs an address generation start instruction for reading image data from the frame buffer 21 when an interrupt signal is received. The address generation unit 22b generates address data based on the address generation start instruction, and reads the image data from the frame buffer 21. The packet generator 22c packetizes and transfers the read image data and address data. The detection control unit 23 analyzes the transferred packet and detects an intruding object.

  The intrusion monitoring system of the present invention generates a packet from an image frame input from a camera, performs packet transfer control based on the appearance characteristics of the intruding object, analyzes the transferred packet, and detects the intruding object. It was set as the structure to detect. This makes it possible to detect an intruding object at an early stage without installing a high-speed bus or a high-performance MPU.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a principle diagram of an intrusion monitoring system according to the present invention. The intrusion monitoring system 1 of the present invention is a system that detects an intruding object by the image sensor device 20 based on an image from the camera 10.

  The camera 10 is a surveillance camera that captures a specific area. The image sensor device 20 includes a frame buffer 21, a packet transfer control unit 22, and a detection control unit 23. The packet transfer control unit 22 includes an address generation start instruction output unit 22a, an address generation unit 22b, and a packet generation unit 22c. including.

  The frame buffer 21 accumulates the frame of the image input from the camera 10 and generates an interrupt signal notifying the end of writing when the accumulation of one frame is completed. The packet transfer control unit 22 performs packet transfer control based on the appearance characteristics of the intruding object.

  When receiving an interrupt signal, the address generation start instruction output unit 22 a outputs an address generation start instruction for reading image data from the frame buffer 21 to the packet transfer control unit 22.

The address generation unit 22b generates address data based on the address generation start instruction, and reads image data from the frame buffer 21 based on the address data.
The packet generator 22c packetizes the read image data and address data to generate and transfer a packet. The detection control unit 23 analyzes the transferred packet and detects an intruding object.

  Here, when a certain area is imaged and monitored by a camera, an object entering the monitoring area always appears from the outside of the screen. In other words, vehicle entry detection, intruder detection, fallen object detection, etc. do not suddenly appear in the center of the monitoring screen area. Also, the object to be tracked is continuously moving on the screen, so that it does not disappear suddenly or move instantaneously.

  Therefore, in the present invention, the packet transfer control unit 22 is configured to transfer only the image portion necessary for the detection process of the intruding object to the detection control unit 23 by making use of such appearance characteristics of the intruding object in the camera image. As a result, even when a high-resolution monitoring camera is used, an intruding object can be detected early without requiring a high-speed bus or a high-performance MPU.

  Next, packet transfer (first to fifth packet transfers) according to the appearance characteristics of the intruding object will be described in detail. FIG. 2 is a conceptual diagram showing the first packet transfer. The image P1 shows a camera image of 1024 × 768 pixels composed of 48 blocks (1 block = 128 × 128 pixels), for example. The first packet transfer is related to the surrounding area of the entire screen when the intruding object detection process is started and the intruding direction of the intruding object is unknown (when it is not known from the top / bottom / left / right direction of the screen). The image data is transferred so as to go around (for example, in the direction of the arrow as shown in the figure). Actually, the image information of each block is divided, the divided image data is inserted into a plurality of packets, and these packets are transferred in an order such that they go around the screen. Note that the transfer position of the first packet transfer is arbitrary.

  The detection control unit 23 receives the packets transferred in this order and detects an intruding object. Thereby, even when the MPU processing capability of the image sensor device 20 is low when a high-resolution camera is used, it is possible to detect an intruding object at an early stage (for intruding object detection processing, (There ’s no need to transfer all the images).

  FIG. 3 is a conceptual diagram showing the second packet transfer. In the second packet transfer, when the intrusion direction of the intruding object is determined, a packet related to one side of the screen in the intrusion direction is transferred. For example, when a road or corridor is taken with a camera from the front, the intrusion direction is determined in advance, and image data on one side of the screen in that direction is transferred. In the image P2, the car travels in the direction of the arrow, so the image data of the rightmost line of the screen is transferred.

FIG. 4 is a diagram for explaining the operation of the image sensor device 20. The operation in the case where the first and second packet transfer control described above with reference to FIGS. 2 and 3 is performed is shown.
[S1] The frame buffer 21 accumulates several frames of images, and transmits an interrupt signal to the address generation start instruction output unit 22a when the accumulation of one frame is completed.
[S2] When receiving the interrupt signal, the address generation start instruction output unit 22a outputs an address generation start instruction for reading an image to the address generation unit 22b.
[S3] The address generation unit 22b generates address data a1 for reading an image from the frame buffer 21 based on an address generation start instruction. Here, in the case of performing the first packet transfer, address data for reading in one round is generated, and in the case of performing the second packet transfer, address data for reading out only one side is generated. The generated address data a1 is transmitted to the frame buffer 21 and the packet generator 22c.
[S4] The frame buffer 21 outputs image data corresponding to the address data a1.
[S5] The packet generator 22c packetizes the image data read from the frame buffer 21 and the address data a1 from the address generator 22b, and transmits the packet to the detection controller 23.
[S6] The detection control unit 23 detects an intruder from the received packet.

  Next, the third packet transfer will be described. 5 and 6 are conceptual diagrams showing the third packet transfer. In the third packet transfer, when an intruding object is detected, in the packet transfer of the next frame, the packet is transferred using the place where the intruding object is detected as a start position for making a round around the screen.

  Assume that the detection control unit 23 detects an intruding object in the block B1 when the packet transfer control unit 22 sequentially transfers the periphery of the screen for the image P3-1 in FIG. Then, as in the image P3-2 in FIG. 6, in the next frame processing, it is considered that the intruding object has a high probability of entering from the same place again, and the start position of the image data transfer is set as the block B1, and the inside of the block B1. Transfer once from the image data. This makes it possible to detect an intruding object at an early stage.

FIG. 7 is a diagram for explaining the operation of the image sensor device 20. The operation when the third packet transfer control described above with reference to FIGS. 5 and 6 is performed is shown. In addition, operation | movement after recognizing the detection of an intruding object by block B1 by said step S6 is demonstrated.
[S11] When detecting the intruding object, the detection control unit 23 transmits the detection position address data a2 to the address generation start instruction output unit 22a.
[S12] In the image transfer in the next frame, the address generation start instruction output unit 22a performs an address generation unit 22b so as to perform packet transfer that goes around the entire screen with the detected position address data a2 as the head. An address generation start instruction is output. Subsequent operations are the same as those in the first packet transfer.

  Next, the fourth packet transfer will be described. 8 and 9 are conceptual diagrams showing the fourth packet transfer. In the fourth packet transfer, when an intruding object is detected, in order to enable tracking of the intruding object in the next frame, in addition to the one-way transfer around the screen, the peripheral portion of the place where the intruding object is further detected Image data is also transferred.

  Assume that the detection control unit 23 detects an intruding object in the block B1 when the packet transfer control unit 22 sequentially transfers the image P4-1 in FIG. Then, as shown in the image P4-2 in FIG. 9, in the next frame processing, in addition to the round transfer around the screen (also provided for other intruding objects), the image data around the detection position of the intruding object is also obtained. Transfer (transfer the image around the detection position first, then transfer once). If such a transfer is continued for each frame process, it becomes possible to follow the intruding object.

FIG. 10 is a diagram for explaining the operation of the image sensor device 20. The operation when the fourth packet transfer described above with reference to FIGS. 8 and 9 is performed is shown. In addition, operation | movement after recognizing the detection of an intruding object by block B1 by said step S6 is demonstrated.
[S21] When detecting the intruding object, the detection control unit 23 transmits the detection position address data a2 and tracking address data a3 around the detection position to the address generation start instruction output unit 22a.
[S22] The address generation start instruction output unit 22a, in the image transfer in the next frame, performs packet transfer that goes around the entire screen periphery with the detected position address data a2 as the head and the tracking address. An address generation start instruction is output to the address generation unit 22b so that the packet around the detection position is transferred based on the data a3. Subsequent operations are the same as those in the first packet transfer.

  Next, the fifth packet transfer will be described. 11 and 12 are conceptual views showing the fifth packet transfer. In the fifth packet transfer, when an intruding object is detected, in order to enable tracking of the intruding object in the next frame, the intrusion direction is predicted from the place where the intruding object is detected, including the peripheral part of the screen. Also forward the packet for the part.

  Assume that an intruding object is detected in the block B1 in the detection control unit 23 when the packet transfer control unit 22 sequentially transfers the periphery of the screen in order to the image P5-1 in FIG. At this time, the detection control unit 23 predicts the traveling direction of the intruding object (predicted blocks are referred to as blocks B2 and B3). Then, as in the image P5-2 in FIG. 12, in the next frame processing, in addition to the peripheral portion of the image, the image data in the blocks B2 and B3 of the predicted progress region of the intruding object is also transferred (predicted image is transferred first). And then transfer once). This makes it possible to track an intruding object with a smaller amount of information compared to the fourth packet transfer.

FIG. 13 is a diagram for explaining the operation of the image sensor device 20. The operation in the case where the fifth packet transfer described above with reference to FIGS. 11 and 12 is performed is shown. In addition, operation | movement after recognizing the detection of an intruding object by block B1 by said step S6 is demonstrated.
[S31] When detecting the intruding object, the detection control unit 23 transmits the detection position address data a2 and the tracking address data a4 in which the traveling direction of the intruding object is predicted to the address generation start instruction output unit 22a.
[S32] In the image transfer in the next frame, the address generation start instruction output unit 22a performs a packet transfer that goes around the entire screen with the detected position address data a2 as the head, and a tracking address. An address generation start instruction is output to the address generation unit 22b so that the packet of the prediction area image is transferred based on the data a4. Subsequent operations are the same as those in the first packet transfer.

  Next, each component of the image sensor device 20 will be described. FIG. 14 is a diagram showing the write / read timing of the frame buffer 21. The frame buffer 21 has a two-surface configuration of A and B surfaces. When image data is written in one frame buffer, a writing / reading process is performed in which the image data is read from the other frame buffer. .

The surface switching is performed based on a transfer request (generated from the MPU in the image sensor device 20) when the camera image is transferred from the camera 10 to the frame buffer 21. When the data writing on one side is completed, the frame buffer generates an interrupt signal and transmits it to the address generation start instruction output unit 22a to start reading from the corresponding frame buffer.
[C1] The image data from the camera 10 is written into the frame buffer 21a.
[C2] The image data around the entire screen is read from the frame buffer 21a based on the first packet transfer, and the image data from the camera 10 is written to the frame buffer 21b. Also, assume that an intruding object is detected at time t1.
[C3] The image data from the camera 10 is written into the frame buffer 21a. Further, from the frame buffer 21b, for example, based on the third packet transfer, image data around the detection position of the intruding object and image data around the entire screen are read out.

  Next, the format of the packet generated by the packet generator 22c will be described. FIG. 15 is a diagram showing a packet format. The packet Pk generated by the packet generator 22c is composed of a header part and a payload part composed of image data 0 to 31.

  Here, the detection control unit 23 has a plurality of MPUs for image processing, and the MPU has a unique ID. The packet generator 22c selects one of a plurality of MPUs (designates an ID) and performs packet transfer.

  For the header part, DSIZE is the data size of the image data 0 to 31. The transfer source ID is the ID of the packet generation unit 22c, and the transfer destination ID is the ID of the MPU. The transfer source address is an address generated by the address generation unit 22b, and the transfer destination address is an address of a storage area necessary when image processing is performed by the MPU. The DSIZE, transfer source ID, and transfer destination ID are 1 byte, and the transfer source address and the transfer destination address are 3 bytes. When a packet having such header information is sent to the detection control unit 23, the detection control unit 23 analyzes the packet addressed to itself and performs an intruding object detection process.

Next, the operation of the detection control unit 23 will be described. FIG. 16 is a flowchart showing the operation of the detection control unit 23.
[S41] The forwarded packet is received.
[S42] The image data in the packet is analyzed to determine whether there is a difference from the image data constituting the previous frame. If there is a difference, the process goes to step S43, and if not, the difference detection process is continued.
[S43] It is determined whether to track the intruding object. When not tracking, it goes to step S44, and when it tracks, it goes to step S45.
[S44] The detected position address data is transmitted.
[S45] It is determined whether or not the traveling direction of the intruding object is predicted. When not predicting, it goes to step S46, and when predicting, it goes to step S47.
[S46] The detection position address data and tracking address data based on the periphery of the detection position are transmitted.
[S47] The detected position address data and the tracking address data based on the prediction are transmitted.

Next, the operation of the packet transfer control unit 22 will be described. FIG. 17 is a flowchart showing the operation of the packet transfer control unit 22.
[S51] The address generation start instruction output unit 22a waits for the end of writing in the frame buffer 21.
[S52] Upon receiving an interrupt signal from the frame buffer 21, the address generation start instruction output unit 22a recognizes the end of writing in the frame buffer 21. If the tracking address data transmitted from the detection control unit 23 is not registered, the process goes to step S53, and if it is registered, the process goes to step S56.
[S53] The address generation start instruction output unit 22a outputs an address generation start instruction. Based on the address generation start instruction, the address generation unit 22b generates an address for transferring the periphery of the entire screen, and the image data is read from the frame buffer 21.
[S54] The packet generator 22c packetizes the read image data and transfers it to the detection controller 23.
[S55] The packet generator 22c returns to step S51 if all the packets related to the blocks around the entire screen have been transferred, and returns to step S53 if not.
[S56] The address generation start instruction output unit 22a outputs an address generation start instruction. Based on the address generation start instruction, the address generation unit 22b generates an address for transferring around the entire screen and a tracking address, and the image data is read from the frame buffer 21.
[S57] The packet generator 22c packetizes the read image data and transfers it to the detection controller 23.
[S58] The packet generator 22c returns to step S51 if all of the packets based on the tracking address and packets related to the blocks around the entire screen have been transferred, and otherwise returns to step S56.

  Next, the effect of the present invention will be described. A high-resolution camera (1024 × 768) is used as the camera 10, and one block around the entire screen necessary for detecting an intruding object is 32 × 32. At this time, the bus transfer speed required for sending the entire screen is 1024 (pixels) × 768 (pixels) × 30 (frames) = 22.5 (MBps).

  Here, the number of 32 × 32 blocks present on the upper and lower lines of the screen is 1024/32 = 32, and the number of 32 × 32 blocks present on the left and right lines of the screen is 768/32 = 24. It is. Accordingly, the bus transfer speed required to send only the part around the entire screen necessary for intrusion detection is (32 × 2 + 24 × 2−4) × 32 (pixel) × 32 (pixel) × 30 (frame) = 3. .16 (MBps).

  On the other hand, the bus transfer speed of the low resolution camera (640 × 240) is 640 (pixel) × 240 (pixel) × 30 (frame) = 4.4 (MBps). In the present invention, the entire screen is sent around, so even when a high-resolution camera is used, the bus transfer speed is 3.16 (MBps), which is within the transfer speed (4.4 (MBps)) compatible with low-resolution cameras. be able to.

  As described above, according to the present invention, in consideration of appearance characteristics of an intruding object, only a portion necessary for detection processing is transferred, so that a high-speed bus or a high-performance MPU can be installed. Even with an MPU having a low processing speed, it is possible to detect and track an intruding object at an early stage, and to perform highly reliable monitoring processing.

(Appendix 1) In an intrusion monitoring system that performs intrusion detection,
A camera for monitoring and shooting a specific area;
A frame buffer that stores an image frame input from the camera and generates an interrupt signal when the accumulation of one frame is completed, and image data is read from the frame buffer when the interrupt signal is received. An address generation start instruction output unit that outputs an address generation start instruction, an address generation unit that generates address data based on the address generation start instruction, and reads image data from the frame buffer, the read image data, Includes a packet generation unit that packetizes and transfers address data, and a packet transfer control unit that controls packet transfer based on the appearance characteristics of the intruding object, and detection that detects the intruding object by analyzing the transferred packet An image sensor device comprising a control unit;
An intrusion monitoring system characterized by comprising:

  (Supplementary note 2) The intrusion monitoring system according to supplementary note 1, wherein the packet transfer control unit forwards the packet so as to go around the entire periphery of the entire screen when the intrusion direction of the intruding object is unknown.

  (Supplementary note 3) The intrusion monitoring system according to supplementary note 1, wherein the packet transfer control unit transfers a packet related to one side of the screen in the intrusion direction when the intrusion direction of the intruding object is determined.

  (Supplementary Note 4) After detecting the intruding object, the detection control unit outputs detection position address data, and the packet transfer control unit uses the detection position address data as a start position in the packet transfer of the next frame. 2. The intrusion monitoring system according to appendix 1, wherein the packet is transferred so as to go around the surrounding area.

  (Supplementary Note 5) The detection control unit outputs the detection position address data and tracking address data around the detection position after detecting the intruding object, and performs the packet transfer control unit in order to track the intruding object in the next frame. Based on the tracking address data, the packet related to the image portion around the detection position is transferred, and the packet is transferred so as to go around the entire periphery of the entire screen with the detection position address data as the start position. The intrusion monitoring system according to appendix 1, characterized by:

  (Supplementary Note 6) After detecting the intruding object, the detection control unit outputs detection position address data and tracking address data in which the traveling direction of the intruding object is predicted, and in order to follow the intruding object in the next frame, The packet transfer control unit transfers a packet related to the image portion specified by prediction based on the tracking address data, and makes a round around the entire screen with the detection position address data as a start position. The intrusion monitoring system according to claim 1, wherein the packet is transferred.

(Supplementary Note 7) In an image sensor device that performs intrusion detection based on an image from a camera,
A frame buffer for accumulating frames of an image input from the camera and generating an interrupt signal when accumulation for one frame is completed;
When receiving the interrupt signal, an address generation start instruction output unit for outputting an address generation start instruction for reading image data from the frame buffer, and generating address data based on the address generation start instruction, Consists of an address generation unit that reads image data from the frame buffer, a packet generation unit that packetizes and transfers the read image data and the address data, and controls packet transfer based on appearance characteristics of an intruding object A packet transfer control unit for performing
A detection control unit that analyzes the transferred packet and detects an intruding object;
An image sensor device comprising:

  (Supplementary note 8) The image sensor device according to supplementary note 7, wherein the packet transfer control unit forwards the packet so as to go around the entire periphery of the entire screen when the intrusion direction of the intruding object is unknown.

  (Supplementary note 9) The image sensor device according to supplementary note 7, wherein the packet transfer control unit transfers a packet related to one side of the screen in the intrusion direction when the intrusion direction of the intruding object is determined.

  (Supplementary Note 10) After detecting the intruding object, the detection control unit outputs detection position address data, and the packet transfer control unit uses the detection position address data as a start position in the packet transfer of the next frame. 8. The image sensor device according to appendix 7, wherein the packet is transferred so as to go around the peripheral portion of.

  (Supplementary Note 11) After detecting the intruding object, the detection control unit outputs the detection position address data and tracking address data around the detection position, and performs the tracking of the intruding object in the next frame. Based on the tracking address data, the packet related to the image portion around the detection position is transferred, and the packet is transferred so as to go around the entire periphery of the entire screen with the detection position address data as the start position. Item 8. The image sensor device according to appendix 7.

  (Supplementary Note 12) After detecting the intruding object, the detection control unit outputs detection position address data and tracking address data in which the traveling direction of the intruding object is predicted, and in order to follow the intruding object in the next frame, The packet transfer control unit transfers a packet related to the image portion specified by prediction based on the tracking address data, and makes a round around the entire screen with the detection position address data as a start position. 8. The image sensor device according to appendix 7, wherein the image sensor device transfers a packet.

It is a principle figure of the intrusion monitoring system of this invention. It is a conceptual diagram which shows 1st packet transfer. It is a conceptual diagram which shows 2nd packet transfer. It is a figure for demonstrating operation | movement of an image sensor apparatus. It is a conceptual diagram which shows 3rd packet transfer. It is a conceptual diagram which shows 3rd packet transfer. It is a figure for demonstrating operation | movement of an image sensor apparatus. It is a conceptual diagram which shows 4th packet transfer. It is a conceptual diagram which shows 4th packet transfer. It is a figure for demonstrating operation | movement of an image sensor apparatus. It is a conceptual diagram which shows 5th packet transfer. It is a conceptual diagram which shows 5th packet transfer. It is a figure for demonstrating operation | movement of an image sensor apparatus. It is a figure which shows the write / read timing of a frame buffer. It is a figure which shows a packet format. It is a flowchart which shows operation | movement of a detection control part. It is a flowchart which shows operation | movement of a packet transfer control part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Intrusion monitoring system 10 Camera 20 Image sensor apparatus 21 Frame buffer 22 Packet transfer control part 22a Address generation start instruction output part 22b Address generation part 22c Packet generation part 23 Detection control part

Claims (5)

In an intrusion monitoring system that performs intrusion detection,
A camera for monitoring and shooting a specific area;
A frame buffer that stores an image frame input from the camera and generates an interrupt signal when the accumulation of one frame is completed, and image data is read from the frame buffer when the interrupt signal is received. An address generation start instruction output unit that outputs an address generation start instruction, an address generation unit that generates address data based on the address generation start instruction, and reads image data from the frame buffer, the read image data, Includes a packet generation unit that packetizes and transfers address data, and a packet transfer control unit that controls packet transfer based on the appearance characteristics of the intruding object, and detection that detects the intruding object by analyzing the transferred packet An image sensor device comprising a control unit;
An intrusion monitoring system characterized by comprising:   The intrusion monitoring system according to claim 1, wherein the packet transfer control unit transfers the packet so as to go around the entire periphery of the entire screen when the intrusion direction of the intruding object is unknown.   The intrusion monitoring system according to claim 1, wherein the packet transfer control unit transfers a packet related to one side of the screen of the intrusion direction when the intrusion direction of the intruding object is determined.   After the detection of the intruding object, the detection control unit outputs detection position address data, and the packet transfer control unit uses the detection position address data as a start position in the packet transfer of the next frame. The intrusion monitoring system according to claim 1, wherein the packet is transferred so as to make a round.   After the detection of the intruding object, the detection control unit outputs detection position address data and tracking address data around the detection position, and the packet transfer control unit performs the tracking of the intruding object in the next frame. Based on the address data, a packet related to an image portion around the detection position is transferred, and the packet is transferred so as to go around the entire periphery of the entire screen with the detection position address data as a start position. The intrusion monitoring system according to claim 1.

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