WO2006085500A1 - 監視カメラ装置、それを用いた監視システムおよび監視画像伝送方法 - Google Patents
監視カメラ装置、それを用いた監視システムおよび監視画像伝送方法 Download PDFInfo
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- WO2006085500A1 WO2006085500A1 PCT/JP2006/301957 JP2006301957W WO2006085500A1 WO 2006085500 A1 WO2006085500 A1 WO 2006085500A1 JP 2006301957 W JP2006301957 W JP 2006301957W WO 2006085500 A1 WO2006085500 A1 WO 2006085500A1
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- image data
- monitoring
- image
- motion
- change
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
- G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
- G08B13/19654—Details concerning communication with a camera
- G08B13/19656—Network used to communicate with a camera, e.g. WAN, LAN, Internet
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
- G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
- G08B13/19663—Surveillance related processing done local to the camera
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
- H04L67/125—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks involving control of end-device applications over a network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
- H04N7/185—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source from a mobile camera, e.g. for remote control
Definitions
- the present invention relates to a monitoring camera device that monitors a remote place using a subject image captured by a monitoring camera or the like, and a monitoring system using the same, and in particular, image data of a captured subject image is stored in a network or the like.
- the present invention relates to a surveillance system that transmits data to a remote location via a network, a surveillance camera device and a surveillance image transmission method used in the system.
- FIG. 5 is a block diagram showing an example of a monitoring system using such a conventional monitoring camera device.
- the monitoring camera device 92 the subject image to be monitored captured by the imaging unit 91 is compression-coded.
- the surveillance camera device 92 transmits the compressed and encoded image data to the surveillance monitor device 94 via a transmission network 93 which is a network such as the 1S Internet.
- the imaging unit 91 images a subject and supplies image data of the captured subject to each encoder provided in the monitoring camera device 92.
- the moving image encoder 913 compresses and encodes the image data supplied from the imaging unit 91 based on a moving image compression encoding method, and generates moving image data that is image data of the compressed and encoded moving image.
- the still image encoder 914 compresses and encodes the image data supplied from the imaging unit 91 based on the still image compression encoding method, and is a still image that is image data of the compressed still image. Generate data. At that time, the still image encoder 914 generates still image data at a cycle slower than the cycle at which the moving image encoder 913 generates moving image data, and also generates still image data having a higher resolution than the moving image data. .
- One digital technique for compressing and encoding still image data is an intra-frame compression encoding method that performs compression encoding using image data in one frame.
- JPEG Joint Photographic Image Experts Group
- JPEG Joint Photographic Image Experts Group
- the transmission unit 915 performs control to transmit the compression-coded moving image data and still image data to the monitoring monitor device 94 via the transmission network 93 in the form of packets.
- the receiving unit 916 performs control to receive data sent from the monitoring / monitoring device 94 via the transmission network 93, and transfers the received data to the transmitting unit 915. Based on the data received from the receiving unit 916, the transmitting unit 915 selects and controls whether to transmit! // shift between moving image data and still image data.
- the change detection unit 919 detects a temporal change in each block obtained by dividing an image into a plurality of blocks, for example. Then, when the number of changed blocks exceeds a predetermined ratio, the change detection unit 919 instructs the still image encoder 914 to generate still image data at that time. Furthermore, the change detection unit 919 instructs the transmission unit 915 to transmit the still image data to the monitoring monitor device 94.
- a receiving unit 921 Inside the monitoring monitor device 94, a receiving unit 921, a moving picture decoder 922, a still picture decoder 923, a display unit 924, a user input unit 925, and a transmitting unit 927 are provided. .
- the receiving unit 921 receives data from the monitoring camera device 92.
- Video decoder 922 Moving image data is also extracted from the medium received by the receiving unit 921 and converted into a video signal.
- the still picture decoder 923 extracts still picture data from the medium of the data received by the receiving unit 921 and converts it into a video signal.
- the video signal generated by the moving picture decoder 922 and the still picture decoder 923 is reproduced by the display unit 924.
- the user input unit 925 receives a user-friendly instruction and notifies the transmission unit 927 of information related to the received instruction.
- the transmission unit 927 notifies the reception unit 916 of the monitoring camera device 92 of the information related to the notified instruction from the user power via the transmission network 93.
- the conventional monitoring system as described above transmits still image data to be monitored at that time when the monitoring target is changed along with transmission of moving image data. Therefore, the user can display this still image data as necessary. Furthermore, since the user does not need to continue to visually check the display unit 924, the burden is reduced, and oversight of changes in the monitoring target can be reduced.
- a transmission network for transmitting data is shared with other data communication, or a communication line shared by a plurality of monitoring camera devices is used. used. Therefore, the capacity that can be transmitted is not constant due to the congestion level of the communication line. When the transmission load became heavy, there was a possibility that a transmission delay would occur or a failure such as packet discard might occur.
- the monitoring image is transmitted based on the congestion state of the network, and the influence of the transmission load is reduced.
- a monitoring image sending device such as the above-described monitoring camera device 92 is provided with a measuring means for measuring the load state of the network.
- a monitoring system that sends moving image data and sends still image data when the network is overloaded has been proposed.
- connection-type communication protocol that requires establishment of a connection between communications is usually used in data transmission.
- the reliability of data transmission is regarded as the most important, and bidirectional confirmation response procedures and retransmission processing for transmission errors are included. Therefore, even when the network is congested as described above, the transmitted data is reliably transmitted to the receiving side. However, since such complicated processing and procedures are necessary, there may be a time delay until the transmitted data is received at the receiving side.
- TCP Transmission Control Protocol
- connectionless communication protocol that does not require establishment of a connection between communication is usually used for data transmission.
- the real-time property of data transmission is regarded as the most important, so the confirmation response procedure and the retransmission processing are not included as in the connection communication protocol, and high-speed transmission processing is not performed.
- the network congestion is large as described above, packet loss occurs on the network, causing inconveniences such as the image on the receiving side being corrupted or the motion of the moving image being stopped. there is a possibility.
- UD P User Datagram Protocol
- RTP Real Time
- Real-time performance such as moving images.
- Time Transport Protocol Time Transport Protocol
- connection type such as TCP where reliability of data transmission is regarded as the most important.
- a communication protocol is used.
- a connectionless communication protocol such as UDP, where there is a real-time property of data transmission, UDP !, or RTP is used.
- the display of a still image based on still image data transmitted by detecting a change in the monitoring subject is intermittent even if the resolution is high. Therefore, there is a problem that it is difficult to determine whether or not the force of the monitoring target in which the change in the monitoring subject is difficult to observe has occurred.
- the monitoring monitor device displays a still image in which the person appears together with the moving image being monitored. This makes it easier for the supervisor to recognize that the monitoring target has changed. Furthermore, since the supervisor can confirm the action of the person from the moving images transmitted at the same time, the person can check whether or not the person has taken an action that is recognized as abnormal, such as theft.
- the supervisor can confirm the person's action from the normally transmitted moving image, and recognize that the person is abnormal such as theft. You can confirm whether or not you have acted like this.
- the network is overloaded, a still image is transmitted instead of a normal moving image.
- the display of the still image is intermittent, there is a possibility of missing a moment of behavior that is recognized as an abnormality such as theft.
- the monitoring person can confirm the action of the person by the moving image transmitted regardless of the load state of the network. It is possible to confirm whether or not a person has taken an action such as theft that is recognized as abnormal.
- image 1S is not particularly important. It is transmitted with a transmission protocol. As a result, the amount of transmission data increases.
- the present invention has been made to solve the above-described problems, is not affected by the load state of a network such as the Internet, and suppresses the load on the network and is necessary for determining an abnormality of a monitoring target. It is an object of the present invention to provide a surveillance camera device capable of accurately transmitting images and a surveillance system using the same.
- the monitoring camera device of the present invention transmits the captured monitoring image data to the monitoring terminal device via a network which is a communication line network, thereby
- This is a monitoring camera device of a monitoring system that monitors a remote location, imaging an object to be monitored, and generating an image data corresponding to the imaged object at a fixed frame period, and generated by the imaging unit
- a moving image extraction unit that extracts image data of each frame in a predetermined frame period from the image data of a predetermined frame period, and the image data extracted by the moving image extraction unit is converted into a still image compression encoding method or a moving image
- a motion image encoder that generates motion image data, which is compression-encoded image data based on the image compression encoding method, and image data;
- a change detection unit that detects a change in the object based on the data and outputs the detection result as a change detection signal, and performs data transmission to the monitoring terminal device via the network.
- a connectionless communication protocol that does not require the establishment of a connection between a processing means based on a connection-oriented communication protocol that requires the establishment of a connection and the communication.
- a transmission processing unit that performs data transmission processing by selectively switching the processing means of the transmission protocol according to the change detection signal.
- the transmission processing unit transmits the motion image data generated by the motion image encoder to the monitoring terminal device via the network based on the connectionless communication protocol.
- the motion image data generated by the motion image encoder is transmitted to the monitoring terminal device via the network based on the connection-type communication protocol.
- the monitoring target image data of a predetermined frame period is transmitted to the monitoring terminal device based on the connectionless communication protocol.
- the monitoring target image data is transmitted to the monitoring terminal device based on the connection type communication protocol. In other words, when monitoring images that have changed are transmitted, they are transmitted using a high-quality transmission protocol that is not affected by the network load.
- an image that is likely to be abnormal for the monitoring target does not have any obstacles such as the image being distorted or stopped moving in the monitoring terminal device.
- motion image data is transmitted based on a high-quality connection-type communication protocol only when the monitoring target changes. Therefore, the amount of data transmission per unit time can be suppressed, and the load on the network can also be suppressed.
- the surveillance camera device of the present invention includes a still image extraction unit that extracts image data in an arbitrary frame from image data of a fixed frame period generated by the imaging unit, and a still image extraction unit.
- a still image encoder that compresses and encodes the image data extracted in step 4 based on a still image compression encoding method and generates still image data that is compressed and encoded image data.
- the transmission processing unit includes a still image encoder.
- the still image data generated by the network is monitored via the network based on the connection-type communication protocol.
- the change detection signal indicates that there is no change
- the motion image data generated by the motion image encoder is transmitted to the monitoring terminal device via the network based on the connectionless communication protocol.
- the change detection signal indicates a change
- the motion image data generated by the motion image encoder is transmitted to the monitoring terminal device via the network based on the connection-type communication protocol.
- the monitoring terminal device can display and monitor a moving image based on motion image data, as well as a high-resolution still image or a still image obtained by cutting out a part of the still image data, for example. Therefore, the monitoring accuracy can be further increased.
- a connection type communication protocol processing means is provided to transmit still image data, and since this processing means is in an operating state, if there is a change in the subject image to be monitored, a connection is established immediately.
- Motion image data can be transmitted by switching from less-type communication protocol processing to connection-type communication protocol. This eliminates the need for processing time for switching the transmission protocol processing, and enables the transmission of images with a possibility of monitoring target abnormality while suppressing delay.
- the motion image data corresponding to the image of the subject to be monitored focuses on quality.
- the transmission is based on a connectionless communication protocol that is a transmission protocol. Therefore, the load on the network can be suppressed.
- the motion image data is transmitted based on the connection-type communication protocol, which is a high-quality transmission protocol that is not affected by the load state of the network. Therefore, it is possible to observe continuously in every predetermined frame period without any obstacles such as the image being corrupted or stopped moving in the monitoring terminal device.
- the monitoring terminal device can display and monitor a moving image based on the motion image data and a still image based on the still image data.
- the accuracy of monitoring can be increased.
- the connection type communication protocol processing means for transmitting still image data is used to instantly connectless communication protocol.
- Motion image data can be transmitted by switching from protocol processing to connection-oriented communication protocol. This eliminates the need for processing time for switching the transmission protocol processing, and enables the transmission of images with a possibility of monitoring target abnormality while suppressing delay.
- the load on the network is suppressed without being affected by the load state of the network such as the Internet.
- images necessary for determining the abnormality of the monitoring target can be transmitted accurately.
- FIG. 1 is a block diagram showing a configuration of a monitoring system including a monitoring camera device according to Embodiment 1 of the present invention.
- FIG. 2 is a flowchart showing a procedure for transmitting motion image data to a monitoring terminal device in the monitoring camera device according to the first embodiment of the present invention.
- FIG. 3 is a flowchart showing a procedure for transmitting each of motion image data and still image data to the monitoring terminal device in the monitoring camera device according to the first embodiment of the present invention.
- FIG. 4 is a block diagram showing a configuration of a monitoring system including the monitoring camera device according to the second embodiment of the present invention.
- FIG. 5 is a block diagram showing an example of a surveillance system using a conventional surveillance camera device.
- FIG. 1 shows a configuration of a monitoring system including the monitoring camera device according to the first embodiment of the present invention. It is a block diagram. As shown in FIG. 1, the monitoring system performs monitoring using a subject image captured by an imaging unit 11 that is a monitoring camera.
- This monitoring system includes a monitoring camera device 10 that generates image data of a subject, a network 30 that transmits image data of a subject captured by the monitoring camera device 10 to a remote location, and a monitoring camera device 10 via the network 30. It includes a monitoring terminal device 40 connected in communication. In this monitoring system, the monitoring image data captured by the monitoring camera device 10 is transmitted to the monitoring terminal device 40 via the network 30 which is a communication network.
- the monitoring camera device 10 is a communication protocol between the monitoring camera device 10 and the monitoring terminal device 40 in accordance with a change in the subject image and a change in the status of the monitoring target. It is characterized by the ability to adaptively switch protocols and transmit image data for monitoring.
- the configuration of the monitoring camera device 10 that is a feature of the present invention will be mainly described.
- the control unit 20 controls various processes of the monitoring camera device 10, performs notification of control information to each unit described below, and receives notification information from each unit.
- the control unit 20 includes a microcomputer and a memory, and performs various controls and processes by executing various programs stored in the microcomputer power memory.
- the control unit 20 is configured to be able to perform data communication with the monitoring terminal device 40 via the network 30. For example, when the monitor inputs instruction information to the monitoring terminal device 40, the instruction information is notified to the control unit 20, and the control unit 20 controls each unit according to the instruction information.
- the imaging unit 11 captures a subject to be monitored and generates image data corresponding to the captured subject image at a constant frame period.
- the imaging unit 11 is a video camera having an imaging element such as a CCD (Charge Coupled Device), for example. From the image sensor, an image signal corresponding to the captured image is output, for example, at a fixed frame period of 30 fps (frame per second). Furthermore, the imaging unit 11 includes an AZD converter that converts an analog signal into a digital signal. Image signal from image sensor The issue is converted to digital image data by this AZD modification. This image data is output from the imaging unit 11 at a frame period of 30 fps, for example. The image data from the imaging unit 11 is supplied to the moving image extraction unit 12 and the still image extraction unit 14.
- CCD Charge Coupled Device
- the moving image extraction unit 12 extracts the image data of each frame for each predetermined frame period from the image data of the predetermined frame period generated by the imaging unit 11, or converts the image data to the image data of the predetermined frame period. .
- the moving image extraction unit 12 converts the image data to 15 fps by extracting the frame once every two frames, or converts it to four frames. By extracting a frame once, it is converted to 7.5fps image data.
- the moving image extracting unit 12 may further have a function of extracting a frame once per frame, that is, outputting 30 fps image data as it is. Further, the frame period to be extracted is notified from the control unit 20 as frame period information.
- the moving image extraction unit 12 converts the number of frames according to the notified frame period information. Image data from the moving image extraction unit 12 is supplied to the resolution conversion unit 121.
- the resolution conversion unit 121 converts the resolution of the image of the image data from the moving image extraction unit 12.
- the resolution conversion unit 121 converts the number of pixels per frame of the supplied image data by performing a thinning process of the pixel data and the like, thereby converting it to a predetermined resolution. For example, when the image data from the imaging unit 11 is a high resolution 4VGA (1280 X960 pixels), the resolution conversion unit 121 uses the 4VGA image data to obtain a medium resolution VGA (640X480 pixels) or CIF (352X288 pixels). ), Certain! / ⁇ convert to low resolution QCIF (176X144 pixels) and output. Note that the resolution converter 121 may further have a function of outputting the 4VGA image data as it is.
- the resolution conversion unit 121 may further include a function of cutting out an area having image power per frame in response to such resolution conversion. For example, it is a function that extracts the image data of the 1/4 upper right area from this 4VGA image data and outputs it as VGA image data. Such a resolution to be converted, a cutout position, a cutout size, and the like are notified from the control unit 20. Resolution converter 121 Then, resolution conversion, image cutout processing, and the like are performed according to the notified information. Image data from the resolution converter 121 is supplied to the motion image encoder 13.
- the motion image encoder 13 is compressed and encoded image data obtained by compressing and encoding the image data supplied from the resolution conversion unit 121 based on a still image compression encoding method or a moving image compression encoding method. Generate motion image data.
- the compression encoding method used by the motion image encoder 13 includes an inter-frame compression encoding method, and more specifically, there is an MPEG2 method or an MP EG4 method that is a moving image compression encoding standard.
- the motion image encoder 13 performs compression encoding processing based on the MPEG2 system or the MPEG4 system.
- the motion image encoder 13 may perform compression encoding with the frame period of the supplied image data based on a still image compression encoding method, that is, a JPEG method that is an intra-frame compression encoding method. It should be noted that such a process for performing compression coding for each frame based on the PEG method is called a motion JPEG method. Since the image data is supplied to the motion image encoder 13 in units of periodic frames, the motion image encoder 13 can compress the image data supplied in units of periodic frames. In this way, the motion image encoder 13 generates motion image data that is image data for a plurality of periodic frames subjected to compression coding.
- the motion image encoder 13 may have a configuration in which the above-described compression encoding method can be switched by the control from the control unit 20. For example, certain image data is compression-encoded based on the inter-frame compression encoding method, and further, the image data of the same frame is compression-encoded based on the intra-frame compression encoding method, and both are sent to the transmission processing unit 19. May be.
- the still image extraction unit 14 extracts image data in an arbitrary frame from the image data having a fixed frame period generated by the imaging unit 11.
- the still image extraction unit 14 extracts image data for one frame from the supplied image data. Further, the still image extraction unit 14 extracts the image data for one frame in response to an instruction from the control unit 20. Image data from the still image extraction unit 14 is supplied to the resolution conversion unit 141.
- the resolution conversion unit 141 has the same function as the resolution conversion unit 121.
- Resolution converter 1 41 converts the resolution of the image data from the still image extraction unit 14.
- the resolution conversion unit 141 further includes a function of outputting the supplied image data as it is, and a function of cutting out a certain image area from the supplied image data. Good.
- Such a resolution to be converted, a cutout position, a cutout size, and the like are notified from the control unit 20.
- the resolution conversion unit 141 performs resolution conversion, image clipping processing, and the like according to the notified information.
- the image data from the resolution conversion unit 141 is supplied to the still image encoder 15.
- the still image encoder 15 compresses the image data supplied from the resolution conversion unit 141 based on, for example, a still image compression code method such as the JPEG method that is an intra-frame compression code method. To generate still image data, which is compressed and encoded image data.
- the still image encoder 15 is supplied with image data for one frame at an arbitrary timing.
- the still image encoder 15 performs compression encoding according to the timing at which the image data is supplied! / ⁇ , and generates still image data that is one frame of image data that has been compression encoded.
- the motion image encoder 13 outputs motion image data corresponding to images captured at predetermined time intervals.
- the motion image encoder 15 outputs still image data corresponding to an image captured at an arbitrary time.
- it is configured so that still image data is output in accordance with an instruction from the supervisor, and the supervisor can display a desired image as necessary.
- the resolution and frame period are appropriately set from the control unit 20 to the resolution conversion unit 121, the resolution conversion unit 141, and the moving image extraction unit 12.
- the resolution and frame period are appropriately set from the control unit 20 to the resolution conversion unit 121, the resolution conversion unit 141, and the moving image extraction unit 12.
- the recording / reproducing unit 29 has a recording medium, and records data on the recording medium or records data on the recording medium. Data read processing is performed.
- the recording / reproducing unit 29 is a hard disk drive (Hard Disk Drive) having a magnetic disk as a recording medium. Alternatively, a memory card having a semiconductor memory as a recording medium may be inserted and removed.
- the recording / reproducing unit 29 records and reproduces the motion image data generated by the motion image encoder 13 and the still image data generated by the still image encoder 15. Recording processing and playback processing of the recording / playback unit 29 are controlled by the control unit 20.
- the recording / playback unit 29 By providing the recording / playback unit 29, even if the monitoring target is overlooked, the image data recorded in the recording / playback unit 29 can be played back and the status and progress of the monitoring target can be confirmed later. This also improves the reliability of monitoring.
- the motion processing unit 16 performs processing related to the motion of the image captured by the imaging unit 11.
- Motion Image Encoder 13 Power When performing compression encoding processing based on the MPEG2 system or MPEG4 system, the motion image encoder 13 generates a motion vector based on these systems. This motion vector is supplied to the motion processing unit 16.
- the motion processing unit 16 generates motion information in the captured image using the motion vector. Also, in the case of the motion image encoder 13 force JPEG method, the motion image encoder 13 does not generate a motion vector. In this case, for example, the motion processing unit 16 may obtain a frame difference value of the image data supplied to the motion image encoder 13 and generate motion information based on the frame difference value.
- the motion processing unit 16 may be configured to generate motion information based on both the motion vector and the frame difference value. Further, the motion processing unit 16 may have a function of generating motion information in each block obtained by dividing an image into a plurality of blocks, for example. The motion information generated by the motion processing unit 16 is notified to a change detection unit 17 and a transmission processing unit 19 described later.
- the change detection unit 17 detects a change in the image captured by the imaging unit 11, a change in the status of the monitoring target, and the like.
- the change detection unit 17 uses the motion information notified from the motion processing unit 16 to detect a change in the captured image. For example, when a person passes in front of the monitoring camera apparatus 10, the passing of the person results in a continuous image of a moving monitoring subject. Therefore, the motion processing unit 16 notifies the change detection unit 17 of motion information indicating that the motion of the monitoring image has occurred. . Based on the notified motion information, the change detection unit 17 detects a change in the captured image on the assumption that a temporal change has occurred in the monitored subject.
- a sensor 28 is connected to the change detection unit 17 in order to detect a change in the status of the monitoring target.
- the sensor 28 is, for example, a sensor that detects a change in temperature, a vibration of the monitoring camera device 10, or an approach of a person or an animal, and detects a change in the status of the monitoring target. It is provided for this purpose.
- the change detection unit 17 detects a change in the monitoring image, a change in the status of the monitoring target, and notifies the alarm processing unit 27 of information regarding such a change. Further, when the change detection unit 17 detects a change in the monitoring image or a change in the status of the monitoring target, the change detection unit 17 notifies the transmission processing unit 19 as a change detection signal.
- the alarm processing unit 27 responds to the notification of the change information from the change detection unit 17, for example, the type of the change, the time when the change occurred, and the state of the monitoring camera device 10 at that time. Generate alarm information that is edited. This alarm information is notified to the recording / reproducing unit 29 and recorded in the recording / reproducing unit 29. The alarm processing unit 27 accumulates and records alarm information in the recording / reproducing unit 29 every time a change is detected in the change detection unit 17. As a result, an alarm list in which alarm information is listed in the recording / playback unit 29 is created. The alarm information is also notified to the transmission processing unit 19.
- the still image data and the motion image data may be added to the alarm information and recorded in the recording / reproducing unit 29.
- the monitoring effect can be further enhanced, for example, the change status can be confirmed in more detail later.
- the transmission processing unit 19 is a communication interface that performs communication connection with the monitoring terminal device 40 via the network 30.
- Various data such as image data are sent from the transmission processing unit 19 to the monitoring terminal device 40.
- data such as instruction information from the monitoring terminal device 40 is received by the transmission processing unit 19.
- the transmission processing unit 19 includes the motion image data generated by the motion image encoder 13 described above, the still image data generated by the still image encoder 15, the alarm information generated by the alarm processing unit 27, and the motion processing unit.
- the motion information generated in 16 is transmitted to the monitoring terminal device 40 via the network 30.
- the transmission processing unit 19 is also connected to the control unit 20. Control unit 20 and monitoring end Data communication with the terminal device 40 is executed via the transmission processing unit 19.
- the transmission processing unit 19 includes a UDP processing unit 191 that performs processing based on UDP (User Datagram Protocol) as a protocol for transmitting data, and a TCP (Transmission Control) as a protocol for transmitting data.
- a connection switching unit 193 that connects the processing unit 192 to the communication unit 194.
- the UDP processing unit 191 forms a UDP packet with a UDP header attached thereto, and performs a process of storing the supplied data in the UDP packet.
- the UDP processing unit 191 is supplied with the motion image data from the motion image encoder 13, and the UDP processing unit 19
- UDP is a type of connectionless communication protocol that has been proposed to perform communication with an emphasis on high-speed transmission in the transport layer.
- the UDP processing unit 191 is based on UDP, which is a transport layer, and can be configured by arranging an RTP (Real-time Transport Protocol) suitable for moving image transmission as an upper protocol.
- RTP Real-time Transport Protocol
- the TCP processing unit 192 forms a TCP packet with a TCP header attached thereto, and performs processing to store the supplied data in this TCP bucket. Furthermore, as described above, TCP is a type of connection-type communication protocol. Therefore, it is necessary to establish a connection between communications and to perform a process for temporary retransmission. Therefore, the TCP processing unit 192 uses a connection confirmation signal called an ACK signal or NACK signal to establish a connection with the monitoring terminal device 40 prior to data transmission. Perform processing. Further, the TCP processing unit 192 determines the connection state with the monitoring terminal device 40 even during data transmission. If it is determined that an error has occurred during data transmission, retransmission processing is performed to transmit the data at the time of the error again.
- the TCP processing unit 192 reliably transmits data to the monitoring terminal device 40 even when the network 30 is heavily congested.
- the TCP processing unit 192 is based on TCP, which is a transport layer, and as an upper-layer application protocol, FTP (File Transfer Protocol) defined as a file transfer protocol and multimedia It can be configured with HTTP (Hyper Text Transfer Protocol) specified for data transfer. Note that it is desirable to use the FTP protocol when saving to a server, especially when there is a change!
- the TCP processing unit 192 is used to exchange various control information and notification information between the control unit 20 and the monitoring terminal device 40. Transmission takes place. Also, the TCP processing unit 192 is notified of alarm information from the alarm processing unit 27 and motion information from the motion processing unit 16, and the TCP processing unit 192 transmits these information to the monitoring terminal device 40. Is also used. Further, the motion image data generated by the motion image encoder 13 and the still image data generated by the still image encoder 15 are supplied to the TCP processing unit 192. The TCP processing unit 192 also transmits the image data. Used.
- the connection switching unit 193 supplies the UDP packet generated by the UDP processing unit 191 and the TCP packet generated by the TCP processing unit 192 to the communication unit 194 according to the switching control.
- the connection switching unit 193 is supplied with a switching control signal from the control unit 20 and a change detection signal from the change detection unit 17.
- the connection switching unit 193 receives the motion image data from the UDP processing unit 191 based on the change detection signal from the change detection unit 17!
- a UDP packet including a packet and a TCP packet including motion image data from the TCP processing unit 192 are selectively supplied to the communication unit 194.
- the connection switching unit 193 selects the UDP packet including the motion image data from the UDP processing unit 191 and supplies the UDP packet to the communication unit 194.
- the connection switching unit 193 selects a TCP packet including the motion image data from the TCP processing unit 192 and supplies the TCP packet to the communication unit 194. To do.
- the transmission processing unit 19 is connected to the TCP processing unit 192, which is a processing means based on a connection-type communication protocol that requires the establishment of a connection between communications, and between the communications. It does not require connection establishment! / And has a UDP processing unit 191 which is a processing means based on a connectionless communication protocol.
- the transmission processing unit 19 is changed by the connection switching unit 193.
- the transmission protocol processing means is selectively switched according to the activation detection signal, and data transmission is executed from the communication unit 194 based on the selected protocol.
- the connection switching unit 193 indicates that the change detection signal has not changed, the transmission processing unit 19 transmits the motion image data to the monitoring terminal device via the network 30 based on the connectionless communication protocol UDP. Transmit to 40.
- the change detection signal indicates that there has been a change
- the motion image data is transmitted to the monitoring terminal device 40 via the network 30 based on TCP, which is a connection type communication protocol.
- the connection switching unit 193 is also supplied with a switching control signal from the control unit 20.
- the control unit 20 uses this switching control signal when transmitting still image data from the still image encoder 15, alarm information from the alarm processing unit 27, and motion information from the motion processing unit 16.
- the TCP switching unit 192 and the communication unit 194 are connected by the connection switching unit 193, and these data and information are transmitted to the monitoring terminal device 40 based on the TCP.
- the control unit 20 also connects the TCP processing unit 192 and the communication unit 194 with the connection switching unit 193 using the switching control signal when communicating with the monitoring terminal device 40, and the TCP. Based on the above, communication with the monitoring terminal device 40 is performed.
- connection of the connection switching unit 193 can be controlled from the control unit 20 in this way, for example, when the change detection signal indicates that there has been a change, the motion image data is transferred to the connectionless communication protocol UDP. It is also possible to transmit to the monitoring terminal device 40 via the network 30 in parallel based on the connection type communication protocol TCP. In addition, by supplying a change detection signal to the control unit 20 so that the control unit 20 can perform control according to the change detection signal, for example, when the change detection signal indicates that there has been a change, It is also possible to transmit both still image data and motion image data to the monitoring terminal device 40 based on TCP.
- the image data for monitoring is transmitted by adaptively switching the protocol that characterizes the present invention. Details will be described focusing on the operation.
- FIG. 2 is a flowchart as a monitoring image transmission method of the present invention showing a procedure for transmitting motion image data to the monitoring terminal device 40 in the monitoring camera device 10. Less than The motion image data transmission process, which is the basic operation of the surveillance camera device 10, will be described below with reference to FIG.
- the monitoring camera device 10 starts the monitoring process.
- the control unit 20 can communicate with the monitoring terminal device 40 via the network 30.
- the control unit 20 waits for an instruction based on instruction information from the monitoring terminal device 40.
- the control unit 20 determines whether there is an instruction to transmit the motion image data. When there is no instruction to transmit motion image data from the monitoring terminal device 40, the control unit 20 waits for the instruction. In addition, when there is an instruction to transmit motion image data from the monitoring terminal device 40, the control unit 20 controls to execute the process of step S102 (step S100).
- the motion image encoder 13 compresses and encodes the image data supplied from the resolution converter 121 in accordance with the control of the control unit 20.
- Motion image data that is compression-encoded image data is generated (step S102).
- the generated motion image data is supplied to the transmission processing unit 19.
- the change detection signal from the change detector 17 is supplied to the transmission processor 19 as described above.
- the transmission processing unit 19 forms a UDP packet in the UDP processing unit 191 and stores the supplied motion image data in the UDP packet.
- the TCP processing unit 192 forms a TCP packet, and the supplied motion image data is also stored in the TCP packet.
- connection switching unit 193 determines the supplied change detection signal.
- the connection switching unit 193 selects the UDP packet from the UDP processing unit 191 when the change detection signal indicates that there is no change.
- the change detection signal indicates that there has been a change
- the TCP packet from the TCP processing unit 192 is selected (step S104).
- the packet selected by the connection switching unit 193 is supplied to the communication unit 194, and a packet including motion image data is transmitted from the communication unit 194 to the monitoring terminal device 40.
- the transmission processing unit 19 When the change detection signal indicates that there is no change, the transmission processing unit 19 The motion image data generated by the coder 13 is transmitted to the monitoring terminal device 40 via the network 30 based on UDP which is a connectionless communication protocol (step S108). Further, when the change detection signal indicates that the change detection signal has changed, the transmission processing unit 19 establishes a connection with the monitoring terminal device 40 based on TCP, and connects the motion image data generated by the motion image encoder 13 to the connection. The data is transmitted to the monitoring terminal device 40 via the network 30 based on TCP, which is a type communication protocol (step S106). Note that the transmission processing unit 19 is configured to establish a connection with the monitoring terminal device 40 based on TCP in advance, for example, when starting a monitoring process such as when the monitoring camera device 10 is initially set. May be.
- control unit 20 determines whether or not the motion image data transmission process requested from the monitoring terminal device 40 has been completed. When the transmission process is completed, the process proceeds to step S112. If the transmission process does not end, the process from step S102 is continued (step S110). When the transmission process ends, the control unit 20 determines whether or not the end of the monitoring process is instructed. When the end of the monitoring process is instructed, the monitoring process ends. If the end of the monitoring process is not instructed, the process returns to step S100 and waits for an instruction to transmit motion image data (step S112).
- the surveillance camera device 10 of the present invention allows the motion image data to be transmitted using the connectionless communication protocol when there is no change in the image of the subject to be monitored or the status change of the monitoring target.
- the data is transmitted to the monitoring terminal device 40 based on a certain UDP.
- monitoring images with no changes or abnormalities are transmitted, they are transmitted using a transmission protocol that does not place importance on quality, so the load on the network without increasing the amount of transmitted data is reduced.
- the motion image data to be monitored is transmitted to the monitoring terminal device 40 based on TCP which is a connection type communication protocol.
- TCP which is a connection type communication protocol.
- TCP a high-quality transmission protocol that is not affected by the load state of the network. It is possible to monitor continuously without obstacles such as collapse or stopping movement, and continuously for every predetermined frame period. The occurrence of abnormalities can be accurately determined.
- motion image data is transmitted based on TCP, which is a high-quality connection-oriented communication protocol, only when there is a change in the monitoring target. Therefore, the amount of data transmission per unit time can be suppressed, and the load on the network can also be reduced.
- FIG. 3 is a flowchart as the monitoring image transmission method of the present invention showing a procedure for transmitting each of the motion image data and the still image data to the monitoring terminal device 40 in the monitoring camera device 10.
- FIG. 3 a process for transmitting two types of image data, ie, motion image data and still image data, which are features of the monitoring camera device 10, will be described.
- the same steps as those in FIG. 2 are denoted by the same reference numerals, and detailed description thereof is omitted.
- the monitoring camera device 10 starts the monitoring process.
- the control unit 20 can communicate with the monitoring terminal device 40 via the network 30.
- the control unit 20 waits for an instruction based on the instruction information from the monitoring terminal device 40.
- Still image data is transmitted based on TCP as described above.
- the TCP processing unit 192 executes processing for establishing a connection with the monitoring terminal device 40 based on TCP in order to transmit still image data (step S200).
- the surveillance camera device 10 can immediately transmit the still image data in response to this request.
- control unit 20 determines whether there is an instruction to transmit still image data. If there is no instruction to transmit still image data from the monitoring terminal device 40, the control unit 20 waits for the instruction. In addition, when there is an instruction to transmit still image data from the monitoring terminal device 40, the control unit 20 controls to execute the process of step S204 (step S202).
- the still image encoder 15 compresses and encodes the image data supplied from the resolution conversion unit 141 in accordance with the control from the control unit 20.
- Still image data that is compression-encoded image data Generate (step S204).
- the generated still image data is supplied to the transmission processing unit 19.
- the control unit 20 controls the transmission processing unit 19 to transmit this still image data.
- the transmission processing unit 19 forms a TCP packet in the TCP processing unit 192 and stores the still image data supplied to the TCP packet.
- the control unit 20 controls the connection switching unit 193 to select the TCP packet from the TCP processing unit 192, and the communication unit 194 transmits the TCP packet storing the still image data to the monitoring terminal device 40. (Step S206).
- control unit 20 determines whether or not it is instructed to end the monitoring process. When the termination of the monitoring process is instructed, the monitoring process is terminated. If it is not instructed to end the monitoring process, the process returns to step S100 and waits for an instruction to transmit motion image data or still image data (step S112).
- the monitoring camera device 10 includes the moving image extraction unit 12 that can change the frame period of the motion image, the resolution conversion unit 121 that can change the resolution and clipping position of the motion image, and the resolution and clipping position of the still image. Is provided with a resolution conversion unit 141 that can vary the above. Therefore, using these, a motion image is displayed at a predetermined frame period with a somewhat low resolution and is monitored as a moving image.
- the high-resolution still image is used to check the change, or the change is cut out, or the high-resolution still image is checked.
- the accuracy of monitoring can be increased.
- a connection between the TCP processing unit 192 and the monitoring terminal device 40 is established, and the TCP processing unit 192 is in an operating state.
- the motion image data can be transmitted immediately by switching from the transmission based on UDP to the transmission based on TCP. Therefore, transmission protocol The processing time for switching the col processing is not required, and it is possible to transmit an image with a possibility of abnormality of the monitoring target while suppressing the delay.
- FIG. 4 is a block diagram showing a configuration of a monitoring system including the monitoring camera device according to the second embodiment of the present invention.
- the present monitoring system performs monitoring using the subject image captured by the imaging unit 11 that is a monitoring camera.
- the surveillance system includes a surveillance camera device 10 that generates image data of a subject, a network 30 that transmits image data of a subject captured by the surveillance camera device 10 to a remote location, and a surveillance camera device 10 via the network 30. It includes a monitoring terminal device 40 connected in communication. The image data for monitoring captured by the monitoring camera device 10 is transmitted to the monitoring terminal device 40 via the network 30 which is a communication line network.
- the same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
- the 4 further includes a network monitoring unit 21 connected to the communication unit 194.
- the network monitoring unit 21 is connected in addition to the change of the monitoring target by the change detection signal. It is characterized by transmitting motion image data by adaptively switching the protocol according to 30 congestion conditions.
- the network monitoring unit 21 is connected to the communication unit 194, monitors the transmission load state according to the status of the network 30, and notifies the control unit 20 of network information based on the monitoring. For example, the network monitoring unit 21 periodically receives a predetermined amount of data from the monitoring terminal device 40, measures the transmission load state of the network 30 based on this reception state, that is, the congestion state, and based on the measurement, the network monitoring unit 21 Generate information.
- the control unit 20 controls the compression encoding method of the motion image encoder 13 based on this network information.
- the control unit 20 selects a still image compression encoding method that is an intra-frame compression encoding method such as the JPEG method, and selects the still image compression encoding method.
- the motion image data generated based on this is supplied to the transmission processing unit 19.
- a moving image compression code method that is an interframe compression code method such as the MPEG4 method is used.
- the motion image data generated based on the moving image compression encoding method is selected and supplied to the transmission processing unit 19.
- motion image data with a large amount of transmission data can be transmitted according to the situation of the network 30.
- the load on the network 30 due to the transmission of the motion image data can be suppressed by transmitting the motion image data by the still image compression code method such as the MPEG4 method.
- motion image data is transmitted by a moving image compression code method such as the JPEG method.
- a moving image compression code method such as the JPEG method.
- the monitoring camera device and the monitoring system of the present invention are used, the load on the network is suppressed without being affected by the load state of the network such as the Internet.
- the network such as the Internet.
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Abstract
Description
Claims
Priority Applications (3)
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US11/720,212 US20090135252A1 (en) | 2005-02-09 | 2006-02-06 | Monitoring camera device, monitoring system using the same, and monitoring image transmission method |
JP2007502591A JPWO2006085500A1 (ja) | 2005-02-09 | 2006-02-06 | 監視カメラ装置、それを用いた監視システムおよび監視画像伝送方法 |
EP06713100A EP1806786A1 (en) | 2005-02-09 | 2006-02-06 | Monitoring camera device, monitoring system using the same, and monitoring image transmission method |
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JPWO2022009356A1 (ja) * | 2020-07-09 | 2022-01-13 | ||
WO2022009356A1 (ja) * | 2020-07-09 | 2022-01-13 | 三菱電機ビルテクノサービス株式会社 | 監視システム |
JP7118322B2 (ja) | 2020-07-09 | 2022-08-15 | 三菱電機ビルソリューションズ株式会社 | 監視システム |
CN115836516A (zh) * | 2020-07-09 | 2023-03-21 | 三菱电机楼宇解决方案株式会社 | 监视系统 |
CN115836516B (zh) * | 2020-07-09 | 2024-03-15 | 三菱电机楼宇解决方案株式会社 | 监视系统 |
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US20090135252A1 (en) | 2009-05-28 |
CN101099240A (zh) | 2008-01-02 |
EP1806786A1 (en) | 2007-07-11 |
JPWO2006085500A1 (ja) | 2008-06-26 |
CN100517746C (zh) | 2009-07-22 |
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