JP2007221581A - Monitor system and image processing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform image processing on images from a plurality of cameras in a multiplexed time-division manner. <P>SOLUTION: The monitor system comprises: a plurality of video transmission units constituted of analog cameras 11-1 to 11-3 and encoders 13-1 to 13-3 for encoding analog video signals or IP cameras 12-1, 12-2; a network 10 to which the plurality of video transmission units are connected; a decoder 21 which is connected to the network 10, fetches at least the I frame contained in video information sent from the plurality of video transmission units and converts the I frame into digital image information for one picture for image processing; and an image processing means 22 for detecting an event by analyzing the image of the digital image information decoded by the decoder 21, in a time-division manner, corresponding to the plurality of video transmission units. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a monitoring system and an image processing apparatus suitable for performing various types of monitoring such as road monitoring and intrusion monitoring using a camera.

  In the conventional monitoring system, as shown in FIG. 12, the analog video signal to be monitored captured by the monitoring cameras 101-1, 101-2,... It was. In order to transmit an analog video signal, it is necessary to provide an equalizer 103 in the transmission line that suppresses the deterioration. The event detection apparatus 102 captures a video signal, performs A / D conversion, performs image processing, and detects an event. A plurality of videos obtained by the monitoring cameras 101-1, 101-2,... When a single event detection device 102 processes the video signal, the video distributor 104 switches the analog video signal and sends it to the event detection device 102.

  In this system, instantaneous switching by the video distributor 104 is impossible, and control for switching the event detection device 102 by the video distributor 104 cannot be performed, and videos taken by a required monitoring camera one after another. However, image processing by time division cannot be executed. The recorder 105 records an analog video signal. The recorder 105 is configured to select and record a necessary analog video signal under the control of the event detection device 102. The video signal recorded in the past will be recorded later. It was impossible to read and perform image analysis.

  FIG. 13 shows a configuration example in which the degradation of the analog video signal is suppressed using the E / O converter 107 and the O / E converter 108 with the transmission line as an optical fiber. In this system, the equalizer 103 is unnecessary, but the E / O converter 107 and the O / E converter 108 are necessary, and there is no change in the need for measures against deterioration of the analog video signal. There is a problem described in FIG.

  In the conventional system shown in FIG. 14, a video switching unit 109 for obtaining a scanned video is provided between the video distributor 104 and the event detection device 102. In this system, the video switching is performed by acquiring the scanned video by the video distributor 104, and the event detection device 102 can be obtained by the desired monitoring cameras 101-1, 101-2,. It is not possible to obtain a system in which scan images are obtained one after another for time-division multiplexing processing.

  Further, the conventional system shown in FIG. 15 includes encoders 111-1, 111-2,... For encoding video signals obtained by the monitoring cameras 101-1, 101-2,. Is transmitted through the network 110 by connecting and encoding the video information. This system includes a decoder 112 which decodes video information related to MPEG2 or MPEG4 encoding and returns it to an analog video signal on the receiving side of the network 110, and this is A / D converted by a capture board or the like in the event detection device 102 Thus, the encoding / decoding iterative process was repeated many times and was complicated.

Patent Document 1 discloses that video signals obtained by a plurality of surveillance cameras are transmitted by MPEG, stored together with date / time information, and a plurality of images are displayed based on the date / time information during reproduction. Patent Document 2 discloses a monitoring system that sends only I frames during normal operation and sends I frames, B frames, and P frames when a certain amount of motion is detected.
JP 2003-163923 A JP 2000-165847 A

  The problem to be solved by the present invention is that when the video information is encoded and transmitted from the surveillance camera side, the encoding / decoding iterative process is repeated many times, and the object of the present invention is Another object of the present invention is to provide a monitoring system and an image processing apparatus that can multiplex image processing of images from a plurality of cameras and perform them in a time-sharing manner.

  The monitoring system according to the present invention includes a plurality of video transmission units that output video information that is encoded by imaging a subject to be transmitted, a network to which the plurality of video transmission units are connected, and the network A decoder that captures at least I frames included in the video information sent by the plurality of video sending units and converts them into digital image information for one screen, and a plurality of video sending units converted by the decoder And image processing means for analyzing the digital image information to be detected in a time-sharing manner and detecting an event.

  The monitoring system according to the present invention includes an image recording unit that records the decoded digital image information, and a recording control unit that adds, as metadata, an analysis result by the image processing unit to the digital image information recorded in the image recording unit. It is characterized by comprising.

  The monitoring system according to the present invention is characterized in that the image processing means changes a processing rate related to digital image information related to transmission of a corresponding video transmission unit according to an analysis result.

  In the monitoring system according to the present invention, the video sending unit includes a zoom mechanism, a turning mechanism, and a resolution changing unit, and the zoom mechanism, the turning mechanism in the video sending unit corresponding to the analysis result by the image processing unit, Camera control means for controlling the resolution changing means is provided.

  The monitoring system according to the present invention includes a sensor for detecting an event, event occurrence notifying means for notifying event occurrence information via a network when the sensor detects an event, and event occurrence information by the event occurrence notifying means. And an analysis control means for executing the analysis by the image processing means on the digital image information related to the transmission of the corresponding video transmission section according to the event occurrence information.

  In the monitoring system according to the present invention, the camera control means receives the event occurrence information sent from the event occurrence notification means via the network, and the zoom mechanism and the turning mechanism in the video transmission unit corresponding to the event occurrence information The resolution changing means is controlled.

  The monitoring system according to the present invention includes a camera control information database in which a video transmission unit to be controlled corresponding to time information and information on control contents are associated with each other, and the camera control means includes information in the camera control information database. A corresponding control is performed accordingly.

  The monitoring system according to the present invention comprises video storage means for taking in and storing video information sent from the video sending section from a network, and taking out the video information stored directly or via the network from the video storage means, the decoder And the analysis by the image processing means is executed.

  An image processing apparatus according to the present invention includes a decoder that captures at least an I frame included in video information and converts it into digital image information for one screen, and digital image information corresponding to a plurality of video transmission units converted by the decoder. And image processing means for performing event detection and event detection.

  In the monitoring system according to the present invention, a plurality of video transmission units that capture and encode a subject to be imaged and output video information that can be transmitted over the network transmits the video information via the network and receives the video information. Since at least an I frame is captured and decoded into digital image information for one screen, digital image information corresponding to a plurality of video transmission units is analyzed in a time-sharing manner, and event detection is performed. It is possible to detect multiple occurrences of the object to be imaged at, so that efficient monitoring is possible. The image processing apparatus according to the present invention also captures at least an I frame included in video information and converts it into digital image information for one screen, and time-divides the digital image information corresponding to the plurality of converted video transmission units. Since the image is analyzed and the event is detected, the occurrence of the event can be detected in a multiplexed manner for the object to be imaged by the plurality of video transmission units.

  In the monitoring system according to the present invention, the video transmission unit includes a zoom mechanism, a turning mechanism, and a resolution changing unit, and is a network according to an analysis result by the image processing unit or when a sensor detects an event. The event occurrence information by the event occurrence notification means for notifying the event occurrence information via the network is received via the network, and the zoom mechanism, the turning mechanism, and the resolution changing means in the corresponding video transmission unit are controlled according to this event occurrence information. As a result, the necessary position can be monitored when necessary, and efficient monitoring is possible.

  In the present invention, video information is transmitted via a network from a plurality of video transmission units that capture an image of a subject and output encoded video information that can be transmitted over the network. The system is configured to capture the image and decode it into digital image information for one screen, avoiding complicated processing and configuration, and analyzing the digital image information corresponding to a plurality of video transmission units in a time division manner to detect events. Thus, the object of detecting the occurrence of multiple events for a subject to be imaged by a plurality of video transmission units has been achieved.

  Embodiments of a monitoring system according to the present invention will be described below with reference to the accompanying drawings. In each figure, the same components are denoted by the same reference numerals, and redundant description is omitted. FIG. 1 is a block diagram showing a first embodiment of a monitoring system according to the present invention. In this system, an object to be imaged is captured by a plurality of analog cameras 11-1, 11-2, 11-3,... To obtain an analog video signal. In addition, a plurality of IP cameras 12-1, 12-2,. The analog cameras 11-1, 11-2, 11-3,... Have encoders 13-1, 13-2, 13-3,. It is connected.

  The analog cameras 11-1, 11-2, 11-3,... And the IP cameras 12-1, 12-2,. Changing means are provided. Analog cameras 11-1, 11-2, 11-3, IP cameras 12-1, 12-2,... And encoders 13-1, 13-2, 13-3,. , And encoders 13-1, 13-2, 13-3,... Are connected to the network 10 and broadcast video information. ing.

  The network 10 is connected to a monitoring terminal 20 constituted by, for example, a personal computer. Further, an image recording unit 30 is connected to the monitoring terminal 20. The monitoring terminal 20 is provided with a decoder 21 configured by software, an image processing unit 22, a recording control unit 23, and a camera control unit 24, and performs a camera control information DB (database) 25 and time measurement. A timer 26 is provided.

  The decoder 21 captures at least I frames included in the video information transmitted from the plurality of video transmission units and converts them into digital image information for one screen for image processing. The image processing means 22 analyzes the digital image information corresponding to the plurality of video transmission units decoded by the decoder 21 in a time-sharing manner, and performs event detection. The recording control unit 23 adds the analysis result by the image processing unit 22 as metadata to the digital image information recorded in the image recording unit 30 and stores it in the image recording unit 30. The camera control unit 24 controls the zoom mechanism, the turning mechanism, and the resolution changing unit in the corresponding camera according to the analysis result by the image processing unit 22, and corresponds according to the information in the camera control information DB 25. Controls the camera.

  For example, as shown in FIG. 2, the camera control information DB 25 is obtained by associating a camera to be controlled corresponding to time information with information on control contents. Here, information on cameras A, B, C, and D selected from time 00:00 to time 06:59, and information on the zoom ratio, turning angle, resolution, and priority for each camera A, B, C, and D, respectively. Are stored correspondingly, and information on cameras E, F, G, and H to be selected from time 07:00 to time 12:59, and the zoom ratio, turning angle, and the like for each camera E, F, G, and H, respectively. Information regarding resolution and priority is stored correspondingly, and similar information is stored corresponding to time.

  The camera control means 24 is provided with a currently selected camera information table GT shown in FIG. 3. In the currently selected camera information table GT, camera information about cameras currently processed by the image processing means 22, Information on the zoom ratio, turning angle, resolution, priority, and event occurrence flag (0: reset, 1: set) is stored.

  The image processing means 22 and the camera control means 24 are realized by the CPU of the monitoring terminal 20 performing processing based on the flowcharts shown in FIGS. The operation will be described below based on the flowcharts shown in FIGS. The monitoring terminal 20 is activated and starts, and information on the zoom ratio, turning angle, resolution, and priority is obtained from the camera control information DB 25 based on the current time of the timer 26 for each selected camera and each camera corresponding to the time ( S11), control information regarding the zoom ratio, turning angle, and resolution is sent to each selected camera via the network 10 to control each camera (S12). Following step S12, the currently selected camera information table GT is referred to and it is detected whether there is a camera for which the event occurrence flag is set (S13).

  If it is detected in step S13 that there is no camera for which the event occurrence flag is set, the information of the selected camera obtained from the camera control information DB 25 in step S11 is directly registered in the currently selected camera information table GT (S14). The video information currently broadcasted by the registered camera is loaded into the selected camera information table GT and decoded (S15). At this time, the MPEG video information includes an I frame, a B frame, and a P frame. Here, only the I frame is captured and decoded. Therefore, since I frames reach a maximum of two frames per second, a plurality of (four in the example of FIG. 3) cameras registered in the currently selected camera information table GT are sequentially switched and captured.

  Subsequent to step S15, the image information obtained for a plurality of cameras is subjected to multiprocessing at the same processing rate in a time division manner (S16). In the image processing here, for example, one or a plurality of known methods such as background difference, inter-frame difference, and pattern matching are used according to the CPU processing capability of the monitoring terminal 20. Following step S16, it is detected whether the data in the camera control information DB 25 is switched (in the example of FIG. 2, time 7:00 or the like) (S17). If it is not the data switching time, image processing is performed. It is determined whether a predetermined event occurrence (detection of an intruder in the intrusion monitoring system or occurrence of traffic jam in the road monitoring system) is detected (S18). If no predetermined event occurrence is detected, the process returns to step S15. Processing continues. When the arrival of the data switching time is detected in step S17, the process returns to step S11 and the process is performed.

  When a predetermined event occurrence is detected in step S18, an event occurrence flag is set for the corresponding camera in the currently selected camera information table GT, the processing rate for the target image information of the event occurrence is increased, and the image processing means 22 The analysis result and time information are added to the corresponding image information as metadata and stored in the image recording unit 30 (S19). In increasing the processing rate, for example, the resolution increase control is performed for the corresponding camera to obtain high-resolution video information, or one of a plurality of methods such as background difference, inter-frame difference, and pattern matching is used. A majority vote is adopted, decoding is performed using B frames or P frames in addition to I frames, and image information for image processing is decoded. Subsequently to step S19, the video information broadcast-transmitted by the camera registered in the currently selected camera information table GT is fetched and decoded (S21), and the time division is performed on the image information obtained for a plurality of cameras. As described above, multi-processing is performed for the image information corresponding to the camera in which the event occurrence flag is set by increasing the processing rate (S22).

  Then, after step S22, it is detected whether it is time to switch the data in the camera control information DB 25 (time 7:00 in the example of FIG. 2) (S23). In the image processing, it is determined whether a predetermined event occurrence (detection of an intruder in the intrusion monitoring system or occurrence of traffic jam in the road monitoring system) is detected (S24). In step S24, a predetermined event occurrence is detected. When detected, the event occurrence flag is set for the corresponding camera in the currently selected camera information table GT, the processing rate for the event occurrence target image information is increased as described above, the analysis result by the image processing means 22 and the time information, etc. Is added to the corresponding image information as metadata and stored in the image recording unit 30 (S25), and the process returns to step S21.

  If the arrival of the data switching time is detected in step S23, the process returns to step S11 and the process is performed. In this case, next, the process proceeds from step S12 to step S13. In step S13, it is detected that there is a camera in which the event occurrence flag is set, and the event occurrence flag is set in the currently selected camera information table GT. The information regarding the cameras that remain is selected, and an allowable number (number according to the processing capability, four in the example of FIG. 3) is selected based on the priority from the selected cameras obtained from the camera control information DB 25 in step S11. Information about the camera is extracted and registered in the currently selected camera information table GT (S20). Thus, efficient monitoring is continued without removing image information from the camera that has captured the occurrence of the event from image processing.

  Further, when a predetermined event occurrence is not detected in step S24 as the above processing proceeds, the occurrence of the event disappears (no intruder detection in the intrusion monitoring system. Traffic congestion in the road monitoring system). (S26) is detected (S26), and if the disappearance of the event occurrence is not detected, the process returns to step S21 to continue the process, but if the disappearance of the event occurrence is detected, the current selection The event occurrence flag is reset for the corresponding camera in the camera information table GT, the processing rate for the target image information of the event occurrence is reduced and returned (S27), and the process proceeds to step S11. In the processing from step S11 performed after step S27, if it is detected in step S13 that no camera has an event occurrence flag set, information on the selected camera obtained from the camera control information DB 25 in step S11. Is registered in the currently selected camera information table GT as it is (S14), the process is performed, and if it is detected in step S13 that there is still a camera in which the event occurrence flag is set, the currently selected camera information table GT Information on the camera in which the event occurrence flag is set is left, and an allowable number (a number according to the processing capability) is selected based on the priority from the selected cameras obtained from the camera control information DB 25 in step S11. In this example, information about the selected camera is extracted and the currently selected camera information table is extracted. Registered in the Bull GT (S20) processing is performed. In the present embodiment, the analysis result by the image processing means 22 is added as metadata to the corresponding image information and stored in the image recording unit 30 only when an event occurrence is detected (S19, S25). When the disappearance of the event occurrence in step S27 is detected, the analysis result can be added to the corresponding image information as metadata and stored in the image recording unit 30. In any case, since the analysis result is added to the corresponding image information as metadata and stored in the image recording unit 30, for example, when the desired image information is read from the image recording unit 30 in the monitoring terminal 20 Can be searched using the added metadata as a key, and the efficiency of monitoring work can be improved.

  FIG. 6 shows a configuration diagram of a monitoring system according to the second embodiment. In this embodiment, a plurality of sensors 41-1, 41-2,... For detecting an event, and when the sensors 41-1, 41-2,. Event occurrence notifying means 40 for notifying event occurrence information is newly provided. In the intrusion monitoring system, the sensors 41-1, 41-2,... Are infrared sensors for detecting intruders, and the road monitoring system is configured by a vehicle detection sensor for detecting occurrence of traffic jams. . In addition to the first configuration, the monitoring terminal 20A includes an analysis control unit 27. The analysis control means 28 receives the event occurrence information from the event occurrence notification means 40 via the network 10 and the digital image information related to the transmission of the video sending section corresponding to the imaging by the corresponding camera according to the event occurrence information. The analysis by the image processing means 22 is executed.

  In addition to the processing in the first embodiment, the camera control means 24 receives event occurrence information sent from the event occurrence notification means 40 via the network 10, and zooms in the corresponding camera according to the event occurrence information. The mechanism, the turning mechanism, and the resolution changing means are controlled. In order to manage event occurrence detection by the sensors 41-1, 41-2,..., A camera to be controlled corresponding to sensor identification information (ID) as shown in FIG. A control information table CT storing identification information, zoom ratio, turning angle, resolution, and priority, and a sensor information management table ST as shown in FIG. 8 are provided. The sensor information management table ST includes a previous detection sensor column for registering the identification information (ID) of the sensor in which the previous event occurrence detection is performed, and a current detection sensor column in which the identification information (ID) of the sensor in which the current event occurrence detection is registered. Yes. Then, the CPU of the monitoring terminal 20A performs an operation according to the program corresponding to the flowchart shown in FIG. 9 by interruption every predetermined time, for example, in addition to the operation according to the program corresponding to the flowchart shown in FIGS. . The configuration of the monitoring system according to the second embodiment is the same as that of the first embodiment except for the above.

  The operation will be described below based on the flowchart shown in FIG. By the interruption, the program corresponding to the flowchart shown in FIG. 9 is started, the contents of the current detection sensor column are moved to the previous detection sensor column, and the sensors 41-1, 41-2,. Is detected, the sensor identification information corresponding to the event occurrence information sent this time is registered in the current detection sensor column (S31), the contents of the previous detection sensor column and the current detection sensor column Are compared (S32), and it is detected whether there is a difference (S33).

  If it is detected in step S33 that there is no difference, the process ends. If a difference is detected in step S33, it is detected whether there is a sensor corresponding to the occurrence of the event that has not been detected (S34). If there is a sensor corresponding to the occurrence of the event (d is not detected in the table of FIG. 8), the information of the corresponding camera is deleted from the currently selected camera information table GT (S35).

  Next, the presence or absence of a new sensor is detected (S36), and when there is a new sensor (b and c are new in the table in FIG. 8), the sensor is shown in FIG. 7 based on the sensor identification information newly registered. The control information table CT is referred to obtain a corresponding camera to be controlled, and the camera control is performed by sending information on the zoom ratio, turning angle, and resolution to the camera (S37), and at the same time, in the currently selected camera information table GT Information on the selected camera corresponding to the number of new centers is deleted based on the priority, and information on the camera corresponding to the new center is registered in the currently selected camera information table GT together with the flag set (S38).

  Since the CPU of the monitoring terminal 20A performs an operation based on a program corresponding to the flowcharts shown in FIGS. 4 and 5, an event occurs by the sensors 41-1, 41-2,... In response to the detection, image processing by the image processing means 22 is performed on the image information relating to the video imaged by a required camera, and necessary monitoring can be appropriately performed. Note that the process of adding metadata to the video information recorded in the image recording unit 30 is performed by the program corresponding to the flowcharts shown in FIGS. 4 and 5, but the occurrence of the event is detected by the sensor described above. In this case, corresponding information (sensor location, ID, detection time, etc.) may be added as metadata to image information from the corresponding camera and stored in the image recording unit 30.

  FIG. 10 shows a configuration diagram of a monitoring system according to the third embodiment. In this embodiment, video storage means constituted by a video storage server 50 is connected to the network 10. The video storage server 50 acquires and stores video information sent from the video sending unit from the network. Here, the video storage server 50 stores video information (MPEG2, MPEG4, etc.) obtained and sent by all cameras together with time information. The video storage server 50 is connected to a monitoring terminal 20C configured by, for example, a personal computer, and an image recording unit 30A is connected to the monitoring terminal 20C.

  The monitoring terminal 20B connected to the network 10 has the same configuration as that of the monitoring terminal 20A provided in the second embodiment, and in addition, the CPU corresponds to the flowchart shown in FIG. By executing the program, the stored video information is extracted from the video storage server 50 via the network 10 and is decoded by the decoder 21 to be analyzed by the recording image processing means 22. Since the monitoring terminal 20B has the same configuration as the monitoring terminal 20A provided in the second embodiment, the display of each means and the like is omitted. The monitoring terminal 20C includes a decoder 21, an image processing unit 22, and a recording control unit 23, and executes a program corresponding to the flowcharts shown in FIGS. 4 and 5 to record a digital image on the image recording unit 30A. The analysis result by the image processing means 22 is added to the information as metadata and recorded. However, the monitoring terminal 20C does not need to change the selected camera based on the time in the programs corresponding to the flowcharts shown in FIGS. 4 and 5, and corresponds to the camera specified from the input unit of the personal computer. Assume that processing is performed on image information.

  In the program corresponding to the flowchart of FIG. 10, for example, when the process according to the second embodiment is started, an event occurs immediately, and the occurrence of the event has been continued if the authenticity is doubtful or before the start. It is activated for confirmation. In the monitoring terminal 20B, since the process according to the second embodiment is executed, for example, the image information corresponding to the selected camera having no event at present and having the lowest priority is used. Assume that the processing is stopped and the program corresponding to the flowchart of FIG. 11 is executed. The operation will be described below.

  The video storage server 50 is accessed to acquire video information corresponding to a predetermined camera from a predetermined time (for example, 5 minutes before the present) (S41), and decoding by the decoder 21 is performed to obtain image information for image processing. (S42). The decoded image information obtained in step S42 is subjected to image processing by the image processing means 22 (S43), and it is determined whether an event occurrence has been detected (S44). In the processing in step 43, it is more preferable to perform processing with higher accuracy, such as processing using an algorithm different from the image processing performed on the current camera with respect to the corresponding camera.

  If no event occurrence is detected in step S44, a notification that no event has occurred is displayed (S45), the absence of an end instruction input is detected (S46), and the processing in step S43 is continued. If the occurrence of an event is detected in step S44, it is compared with the result of image processing performed on the current image for the corresponding camera (S47), and it is detected whether a matching result is obtained (S48). If it is not obtained (for example, the occurrence of traffic jams and fog in the road monitoring system), the image processing result is informed by displaying a mismatch or erroneous detection (S49), and no termination instruction is input. (S51) and the process in step S43 is continued.

  If a coincidence result is obtained in step S48, a notification that the image processing results are coincident or that the event has continued is displayed (S50), and it is detected that there is no end instruction input ( S51) The processing in step S43 is continued. When an end instruction input is detected in steps S46 and S51, the process is ended. Thus, according to the present embodiment, it is possible to perform image processing using the stored video information, detect and notify the continuity of evaluation and event occurrence regarding image processing, and perform appropriate monitoring. It is.

  Although not shown in FIG. 10, a client computer is connected to the network 10, video information corresponding to a predetermined camera is acquired from the image storage server 50 from a predetermined time, and MPEG is decoded to display the video. And can be monitored.

The figure which shows the structure of the monitoring system which concerns on 1st Example in this invention. The figure which shows the content of the camera control information database used for the monitoring system which concerns on 1st Example in this invention. The figure which shows the content of the currently selected camera information table used for the monitoring system which concerns on 1st Example in this invention. The flowchart for demonstrating operation | movement of the monitoring system which concerns on 1st Example in this invention. The flowchart for demonstrating operation | movement of the monitoring system which concerns on 1st Example in this invention. The figure which shows the structure of the monitoring system which concerns on 2nd Example in this invention. The figure which shows the content of the control information table used for the monitoring system which concerns on 2nd Example in this invention. The figure which shows the content of the sensor information management table used for the monitoring system which concerns on 3rd Example in this invention. The flowchart for demonstrating operation | movement of the monitoring system which concerns on 2nd Example in this invention. The figure which shows the structure of the monitoring system which concerns on 3rd Example in this invention. The flowchart for demonstrating operation | movement of the monitoring system which concerns on 3rd Example in this invention. The figure which shows the structure which concerns on the conventional monitoring system. The figure which shows the structure which concerns on the conventional monitoring system. The figure which shows the structure which concerns on the conventional monitoring system. The figure which shows the structure which concerns on the conventional monitoring system.

Explanation of symbols

10 Network 11-1, 11-2, 11-3 Analog Camera 12-1, 12-2 IP Camera 13-1, 13-2, 13-3 Encoder 20, 20A, 20B, 20C Monitoring Terminal 21 Decoder 22 Image Processing Means 23 Recording control means 24 Camera control means 25 Camera control information DB
26 Timer 27 Analysis control means 30, 30A Image recording unit 40 Event occurrence notification means 41-1, 41-2 Sensor 50 Video storage server

Claims (9)

A plurality of video transmission units for imaging the object to be imaged and outputting encoded video information that can be transmitted through the network;
A network to which the plurality of video transmission units are connected;
A decoder connected to the network for capturing at least an I frame included in the video information transmitted by the plurality of video transmission units and converting it into digital image information for one screen;
A monitoring system comprising: image processing means for performing event analysis on digital image information corresponding to a plurality of video transmission units converted by the decoder in a time division manner. An image recording unit for recording the decoded digital image information;
The monitoring system according to claim 1, further comprising: a recording control unit that adds, as metadata, an analysis result by the image processing unit to digital image information recorded in the image recording unit. The monitoring system according to claim 1, wherein the image processing unit changes a processing rate related to digital image information related to transmission of a corresponding video transmission unit according to an analysis result. The video sending unit includes a zoom mechanism, a turning mechanism, and a resolution changing means,
The monitoring system according to claim 1, further comprising a camera control unit that controls a zoom mechanism, a turning mechanism, and a resolution changing unit in a corresponding video transmission unit according to an analysis result by the image processing unit. . A sensor for detecting an event, and event occurrence notifying means for notifying event occurrence information via a network when the sensor detects an event;
Analysis control means for receiving event occurrence information by the event occurrence notification means via a network, and performing analysis by the image processing means on digital image information related to transmission of a corresponding video transmission section according to the event occurrence information; The monitoring system according to claim 1, further comprising: The camera control means receives the event occurrence information sent from the event occurrence notification means via the network, and controls the zoom mechanism, the turning mechanism, and the resolution changing means in the corresponding video transmission unit according to the event occurrence information. The monitoring system according to claim 5. Provided with a camera control information database in which video transmission units to be controlled according to time information and information on control contents are associated with each other,
The monitoring system according to claim 4, wherein the camera control unit performs corresponding control according to information in the camera control information database. Video storage means for capturing and storing video information sent from the video sending unit from the network,
2. The monitoring system according to claim 1, wherein video information stored directly from the video storage means or via a network is extracted, decoded by the decoder, and analyzed by the image processing means. A decoder that captures at least an I frame included in video information and converts it into digital image information for one screen;
An image processing apparatus comprising: image processing means for performing event analysis by analyzing digital image information corresponding to a plurality of video transmission units converted by the decoder in a time-sharing manner.

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