JP4508981B2 - Monitor display device and monitoring system using the same - Google Patents

Description

  The present invention relates to a monitor display device for monitoring used in a monitoring system including a number of monitoring cameras.

  Conventionally, a plurality of camera units including a monitoring camera that captures each monitored location and a transmitter that transmits video captured by the surveillance camera are provided to receive the video captured by the surveillance camera. A monitoring unit having a terminal and a monitor display for displaying video received by the terminal is provided in a monitoring room, for example, and the transmitter of each camera unit and the terminal of the monitoring unit are connected via a network such as a packet communication network. Connected monitoring system.

In such a monitoring system, for example, as shown in FIG. 4, the display area of the monitor display of the monitoring unit includes a main image display area 52 including a plurality of moving image display areas 53, a camera information display area 54, and the like. The camera information display area 54 is configured to display a camera list, that is, character information about each surveillance camera (IP address corresponding to each surveillance camera and installation location of the surveillance camera) 56. Yes. Then, for example, by operating the mouse, a certain character information 56 is selected and dragged and dropped onto a desired moving image display area 53, so that a moving image captured by the monitoring camera corresponding to the character information 56 is displayed. A desired moving image display area 53 can be displayed.
JP 2003-163914 A

  In the above conventional configuration, by selecting the character information 56 displayed in the camera information display area 54, the surveillance camera that wants to display the moving image taken in the main image display area 52 is selected. For example, there may be tens or hundreds of surveillance cameras installed. When a large number of surveillance cameras are installed in this way, in order to select a surveillance camera to display a moving image, camera information The characters such as the installation location of the monitoring camera included in each of the large number of character information 56 shown in the display area 54 must be read one by one to find and select the character information 56 corresponding to the desired monitoring camera, It will take a long time.

  The present invention has been made to solve the above-described problems, and a monitor display device capable of shortening the time required for selecting a monitoring camera to display a moving image shot on the screen of the monitor display. It aims at providing the monitoring system using it.

In order to solve the above problems, the monitor display device of the present invention divides the entire display area of the screen to have the camera information display area and the moving image display area, the predetermined timing by each of the monitoring cameras multiple Thumbnail images obtained by reducing the still images taken in the above are displayed from the top to the bottom row in the camera information display area in the order of their display priority, and arbitrary images selected from the displayed thumbnail images are displayed. Image display means for displaying a moving image taken by the monitoring camera corresponding to the thumbnail image in the moving image display area, and the arbitrary thumbnail image from the thumbnail images displayed in the camera information display area. and a selection operation means an operation for selecting is performed, the moving image photographed by the monitoring camera corresponding to the thumbnail image It is configured to change the display priority as the display priority as the number of times or the accumulated time indicated increases.

According to this configuration, when selecting a surveillance camera to display a captured moving image, the thumbnail image displayed in the camera information display area is viewed, and the photograph is taken by the surveillance camera to be selected from among the thumbnail images. A thumbnail image with a reduced still image may be selected by operating the selection operation means. Therefore, by looking at the thumbnail image corresponding to the still image taken by the surveillance camera, it is possible to intuitively recognize where the surveillance camera is installed, and the surveillance camera trying to display the moving image It is possible to shorten the time required for selection.
The thumbnail image may further include a means for updating the thumbnail image to the latest image.

  The image display means divides the entire display area of the screen so as to have the camera information display area and a plurality of the moving image display areas, and the selection operation means includes the moving image display area. An operation for selecting the thumbnail image corresponding to the monitoring camera that captures the displayed moving image is performed, and a moving image captured by the monitoring camera corresponding to the selected thumbnail image is displayed. An operation for selecting the moving image display area from the plurality of moving image display areas may be performed. Thereby, the moving image image | photographed with the some monitoring camera can be displayed simultaneously.

  The image display means is configured to display a character string indicating information related to the monitoring camera corresponding to each thumbnail image in the camera information display area in association with each thumbnail image. You may have been. Thereby, when selecting a surveillance camera to display a moving image, it can be confirmed by looking at the character string whether the surveillance camera is to be selected.

  In this case, the selection operation means can perform an operation for selecting a character string indicating information related to the monitoring camera corresponding to the thumbnail image, and selecting the character string It may be configured to be equivalent to selecting a thumbnail image.

The monitoring system of the present invention includes a plurality of camera units each including a monitoring camera, and a monitoring unit including the monitor display device according to any one of claims 1 to 5 , wherein the camera unit includes the monitoring camera. The transmission unit transmits the still image data and the moving image data captured by the transmission unit to the monitoring unit via a communication line, and the monitoring unit transmits the transmission unit of the camera unit via the communication line. Receiving means for receiving the still image data and moving image data to be transmitted; and the image display means of the monitor display device converts the still image data received by the receiving means into thumbnail image data. Converting, displaying the thumbnail image in the camera information display area based on the data of the thumbnail image, In based on the data of the moving image that is received is configured to display the moving image to the moving image display area.

  According to this configuration, since the conversion from the still image captured by the monitoring camera to the thumbnail image, that is, the creation of the thumbnail image, is performed not by each camera unit but by the monitor display device of the monitoring unit, An increase in load on the camera unit can be suppressed. In many cases, a plurality of monitoring units are provided. In such a case, when moving image data is transmitted from one camera unit to one monitoring unit, there is a request for a thumbnail image in another monitoring unit. In this case, it is not preferable to create and transmit thumbnail images while transmitting moving image data with a certain camera unit as described above. In addition, it is not preferable to provide a thumbnail image creation function in each of a larger number of camera units than the monitoring unit because the cost of the entire monitoring system increases. The effects of the monitor display device used in the monitoring unit are as described above.

  The present invention has the above-described configuration, and a monitor display device capable of shortening the time required for selecting a monitoring camera to display a moving image shot on the screen of the monitor display and monitoring using the same The system can be provided.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  It is a block diagram which shows the structure of the monitoring system of embodiment of this invention of FIG.

  In this monitoring system, a plurality of camera units 2 installed at monitored locations and a monitoring unit 3 installed in a monitoring room, for example, are connected to a network 1. An IP address is assigned to each of the transmitters 21 of the plurality of camera units 2 and the terminals 31 of the monitoring unit 3.

  The network 1 is, for example, an Ethernet type LAN.

  The plurality of camera units 2 are installed at different monitored locations. Each camera unit 2 includes a transmitter 21 and a monitoring camera 22 that captures an image. The transmitter 21 is connected to the network 1. For example, the video analog signal input from the monitoring camera 22 is converted into a packet including information on the transmission destination and the IP address of the transmission source in a header and is transmitted to the network 1. In addition, a packet whose destination IP address is its own address is acquired from the network 1.

  The monitoring unit 3 includes a terminal 31 composed of a general-purpose computer and a monitor display 32. Although not shown, the terminal 31 includes a keyboard for inputting information and the like as an input operation device and a mouse as a pointing device. The terminal 31 is connected to the network 1 and acquires from the network 1 a packet whose destination IP address is its own address. The terminal 31 and the monitor display 32 constitute the monitor display device of the present invention. Here, the mouse provided in the terminal 31 functions as a selection operation means.

  FIG. 2 is a block diagram showing an internal functional configuration of the transmitter 21 of the camera unit 2 and the terminal 31 of the monitoring unit 3 of the monitoring system. In FIG. 2, only one of the plurality of camera units 2 is illustrated, but the configuration of other camera units 2 that are not illustrated is the same.

  The transmitter 21 includes a network processing unit 23, a moving image encoding unit 24, a still image encoding unit 25, and a control unit 26 that controls them. The moving image encoding unit 24 encodes the video analog signal input from the monitoring camera 22 in, for example, MPEG4 format (A / D conversion and compression processing) to generate compressed moving image data, and the network processing unit To 23. The still image encoding unit 25 encodes the video analog signal input from the surveillance camera 22 in, for example, JPEG format (A / D conversion and compression processing) to generate still image compressed data, and a network processing unit To 23.

  The network processing unit 23 has a network interface function and a packet assembly / disassembly function (PAD: Packet Assembly Disassembly), packetizes moving image compressed data input from the moving image encoding unit 24 into a moving image packet, Further, the compressed still image data input from the still image encoding unit 25 is packetized into a still image packet and transmitted to the network 1. In addition, the network 1 acquires a packet whose destination IP address is the address of the transmitter 21 including itself.

  The terminal 31 of the monitoring unit 3 includes a network processing unit 33, a moving image decoding unit 34, a moving image memory 35, a still image decoding unit 36, a thumbnail creation unit 37, a thumbnail image memory 38, and an IP address storage unit 39. , An address-installation location correspondence table memory 40, a display control unit 41, and a control unit 42 for controlling them. The network processing unit 33 has a network interface function and a packet assembling / disassembling function (PAD), and acquires from the network 1 a packet whose destination IP address is the address of the terminal 31 including itself. If the packet is a moving image packet, the data portion (moving image compressed data) of the moving image packet is extracted and output to the moving image decoding unit 34. The moving image decoding unit 34 decodes (decompresses) the moving image compressed data to generate moving image data and stores it in the moving image memory 35. In addition, when the acquired packet is a still image packet, the network processing unit 33 extracts the data portion (still image compressed data) of the still image packet and outputs it to the still image decoding unit 36. The still image decoding unit 36 decodes (decompresses) the still image compressed data to generate still image data, and outputs the still image data to the thumbnail creation unit 37. The thumbnail creating unit 37 converts still image data into reduced still image (thumbnail image) data and stores the converted data in the thumbnail image memory 38. The IP address storage unit 39 is a storage unit that stores the IP address of the transmitter 21 that has been confirmed to be connected to the network 1. The address-installation location correspondence table memory 40 stores in advance a table in which the IP addresses of the transmitters 21 of all the camera units 2 are associated with the installation locations of the monitoring cameras. The display control unit 41 controls the monitor display 32 based on the moving image data in the moving image memory 35, the thumbnail image data in the thumbnail image memory 38, the data in the address-installation location correspondence table memory 40, and the like. Display moving images and thumbnail images on the screen.

  Next, the operation of the monitoring system of the present embodiment configured as described above will be described. Hereinafter, for convenience, the IP address of the transmitter 21 is also referred to as the IP address of the monitoring camera 22.

  In the terminal 31 of the monitoring unit 3, the control unit 42 controls the network processing unit 33 at the time of activation and at a fixed time interval after activation, and a packet of “request for existence confirmation” is transmitted to the network 1 using a broadcast method. Send it out. Note that the fixed time interval for sending the “presence confirmation request” packet is stored in the control unit 42, and the fixed time interval can be set or changed by operating the keyboard or the like. .

  When the transmitter 21 of each camera unit 2 receives the “request for existence confirmation” packet, the network processing unit 23 outputs the contents to the control unit 26. In response to the “existence confirmation request”, the control unit 26 controls the network processing unit 23 to create a “presence confirmation response” packet and transmit it to the terminal 31. The header of this “presence confirmation response” packet includes information on the IP address of the transmission source and the IP address of the transmission destination, and the IP address of the transmission source transmitter 21 is stored in the transmission source IP address. The IP address of the destination terminal 31 is stored in the destination IP address.

  Since the “existence confirmation response” packet transmitted from each transmitter 21 includes information on the IP address of the transmission source as described above, the control unit 42 controls the network processing unit 33 in the terminal 31. Then, the IP address storage unit 39 stores the source IP address included in the “presence confirmation response” packet received by the network processing unit 33.

  With the above operation, the IP address of the transmitter 21 of the camera unit 2 that is connected to the network 1 and is operating is stored in the IP address storage unit 39.

  Next, the terminal 31 of the monitoring unit sequentially issues a transmission request for still images taken by the monitoring camera 22 to all transmitters 21 having the IP addresses stored in the IP address storage unit 39, and transmits them. A thumbnail image of the still image that has been created is created and stored. This procedure will be described in detail.

  First, the control unit 42 of the terminal 31 controls the network processing unit 33 to designate any one of the IP addresses stored in the IP address storage unit 39 as a transmission destination, and “request for still image”. "Is created and transmitted.

  In the transmitter 21 that has received the above-described “still image request” packet, the network processing unit 23 outputs the contents to the control unit 26. In response to the “still image request”, the control unit 26 controls the still image encoding unit 25 and the network processing unit 23, and the still image encoding unit 25 is stopped from the video analog signal input from the monitoring camera 22. The compressed image data is created, and is transmitted to the terminal 31 as a packet (still image packet) by the network processing unit 23.

  When receiving the still image packet, the network processing unit 33 of the terminal 31 extracts the data portion (still image compressed data) of the packet and outputs it to the still image decoding unit 36. The still image decoding unit 36 generates still image data by decoding (decompressing) still image compressed data, and outputs the still image data to the thumbnail creating unit 37. The thumbnail creation unit 37 converts still image data into still image (thumbnail image) data reduced by reducing the number of pixels, and stores the thumbnail image data in the thumbnail image memory 38. At this time, the thumbnail image memory 38 receives from the network processing unit 33 the IP address of the transmission source monitoring camera 22 included in the header of the still image packet received by the network processing unit 33 and stores it together with the thumbnail image data. To do.

  By repeating the above procedure, thumbnail image data of still images taken by the monitoring camera 22 corresponding to each of all the IP addresses stored in the IP address storage unit 39 is created, and each transmission source Are stored in the thumbnail image memory 38 together with the IP address of the surveillance camera 22.

  Using the thumbnail image data stored in the thumbnail image memory 38, a thumbnail image is displayed on the screen of the monitor display 32 as described below.

  In the display control unit 41 of the terminal 31, the thumbnail image data stored in the thumbnail image memory 38 and the IP address data of the monitoring camera 22 are input and stored in the memory 40 from the IP address of each monitoring camera 22. The data of the installation location of each monitoring camera 22 is acquired with reference to the table. Then, the monitor display 32 is controlled, and each thumbnail image and character information (IP address and installation location of the monitoring camera 22) are displayed in correspondence with each other in the camera information display area 54 (see FIG. 3) of the display screen. To do. Here, each thumbnail image is displayed on the screen of the monitor display 32 by the display control unit 41 in order from the thumbnail image data that is created and stored in the thumbnail image memory 38.

  FIG. 3 shows a display example of the monitor display 32 screen. FIG. 4 shows a display example of the screen of the monitor display 32 when the same display as the conventional display is performed in the camera information display area 54.

  In the example of FIG. 3, the entire display area 51 of the screen of the monitor display 32 is divided into a main image display area 52, a camera information display area 54, and another function display area 57. In the camera information display area 54, as described above, a thumbnail image 55 obtained by reducing a still image taken by each surveillance camera 22 (a specific image is not shown in FIG. 3) and a lower part thereof are displayed. Paired with the character information (IP address and installation location of the monitoring camera 22) 56 corresponding to the thumbnail image 55, the respective thumbnail image 55 and character information 56 are displayed. In this example, the main image display area 52 has four moving image display areas 53. In the example of FIG. 3, there are only eight sets of thumbnail images 55 and character information 56 that are completely displayed in the camera information display area 54, but the display contents of the camera information display area 54 can be moved up and down. It is configured. That is, by scrolling, all thumbnail images 55 and character information 56 can be viewed. In the example of FIG. 3, the display contents of the camera information display area 54 can be moved up and down, but may be configured to be moved left and right. An example of the display of the character information 56 in FIG. 3 is the same as the character information 56 shown in FIG.

  An operator of the terminal 31 such as a monitor selects (designates) a certain thumbnail image 55 or character information 56 displayed in the camera information display area 54 and selects a certain moving image display area 53. By (designation), a moving image captured by the monitoring camera 22 corresponding to the selected thumbnail image 55 or character information 56 can be displayed in the selected moving image display area 53. For example, by operating a mouse and dragging one thumbnail image 55 or character information 56 to a desired moving image display area 53 and dropping it (drag and drop), a signal corresponding to the operation is generated. Input to the control unit 42 via the display control unit 41. In response to this input, the control unit 42 controls the network processing unit 33 to specify the IP address of the monitoring camera 22 corresponding to the dragged and dropped thumbnail image 55 or the character information 56 as the transmission destination, Create and send a “video request” packet. Further, the display control unit 41 controls the monitor display 32 so as to display a moving image photographed by the monitoring camera corresponding to the selected thumbnail image 55 or the character information 56 in the selected desired moving image display area 53. To do. When a moving image taken by another previously selected monitoring camera is displayed in the selected desired moving image display area 53, the display control unit 41 notifies the control unit 42 accordingly. . In response to this, the control unit 42 controls the network processing unit 33 to specify the IP address of the other monitoring camera 22 as a transmission destination and create a packet of “moving image transmission stop request”. Send it. In the transmitter 21 that has received this “moving image transmission stop request” packet, the network processing unit 23 outputs the contents to the control unit 26. In response to the “moving image transmission stop request”, the control unit 26 causes the moving image encoding unit 24 to stop generating compressed moving image data, and causes the network processing unit 23 to generate moving image packets and the terminal 31. Stop sending to.

  In the transmitter 21 that has received the “video request” packet, the network processing unit 23 outputs the contents to the control unit 26. The control unit 26 controls the moving image encoding unit 24 and the network processing unit 23 in response to the “moving image request”, and moves the moving image from the video analog signal input from the monitoring camera 22 to the moving image encoding unit 24. The image compression data is sequentially generated, and is converted into a packet (moving image packet) by the network processing unit 23 and sequentially transmitted to the terminal 31.

  When the network processing unit 33 of the terminal 31 sequentially receives moving image packets, the data portion (moving image compressed data) of the packets is extracted and output to the moving image decoding unit 34. In the moving image decoding unit 34, moving image data is sequentially generated by decoding (decompressing) moving image compressed data, and sequentially stored in the moving image memory 35. At this time, the moving image memory 35 receives the IP address of the transmission source monitoring camera 22 included in the header of the moving image packet received by the network processing unit 33 from the network processing unit 33 and stores it together with the moving image data. To do.

  The display control unit 41 inputs the moving image data sequentially stored in the moving image memory 35 and the IP address data of the monitoring camera 22, and refers to the correspondence table stored in the memory 40 from the IP address of the monitoring camera 22. Thus, the data of the installation location of the monitoring camera 22 is acquired. Then, the monitor display 32 is controlled to display the moving image and the character information (the IP address and the installation location of the monitoring camera 22) in the desired moving image display area 53 dragged and dropped. In this case, the character information display area is provided in a part of the periphery of the moving image display area 53 (for example, the upper end, the lower end, the right end or the left end) to display the character information, and the moving image is displayed in the other moving image display area 53. May be displayed, or a moving image may be displayed in the entire area of the moving image display area 53, and character information may be displayed in an overlapping manner.

  Further, when a moving image is displayed in the moving image display area 53, for example, a stop button (for example, “a” is displayed at one of the four corners of the moving image display area 53. Button is displayed, and the display of the moving image in the moving image display area 53 is stopped by operating the mouse and clicking the stop button. In this case, in response to the above operation, the display control unit 41 controls the display 32 to stop the display of the moving image in the moving image display area 53 where the stop button is clicked, and the control unit 42 controls the above-described operation. A signal corresponding to the operation of is sent. In response to the signal, the control unit 42 controls the network processing unit 33 to specify the IP address of the monitoring camera 22 where the moving image displayed in the moving image display area 53 is taken as the transmission destination. Then, a “moving image transmission stop request” packet is generated and transmitted. The operation of the transmitter 21 that has received the “moving image transmission stop request” packet is as described above.

  In the present embodiment, when selecting a surveillance camera to display a captured moving image in the moving image display area 53, the thumbnail image 55 displayed in the camera information display area 54 is viewed and selected from the thumbnail images 55. What is necessary is just to look for the thumbnail image 55 corresponding to the surveillance camera which should be. By looking at the thumbnail image 55, it is possible to intuitively recognize where the surveillance camera is installed, and it is possible to shorten the time required for selecting the surveillance camera to display a moving image. Become.

  Further, the display order of each set of the thumbnail image 55 and the character information 56 displayed in the camera information display area 54 is displayed in order from the set with the highest display priority, for example, from the top to the bottom line of the camera information display area 54. In addition, in the same row, a display with a higher display priority is displayed on the left side, and a lower display is displayed on the right side. Here, for example, the display priority may be determined so as to increase as the corresponding IP address value decreases or vice versa. In addition, the display priority may be initially set as described above, and thereafter, the display priority may be changed based on a predetermined condition. For example, the display control unit 41 measures and stores the number of times or accumulated time the moving image corresponding to each set is displayed in the moving image display area 53, and the higher the number or accumulated time, the higher the display priority. The display priority is changed every predetermined time or at any time so as to increase. As a result, the thumbnail image 55 and the character information 56 corresponding to the surveillance camera in which the moving image is displayed many times or accumulated time, that is, the moving image is desired to be displayed, are displayed in the upper row of the camera information display area 54. Therefore, the visibility can be improved, and the time required for selecting the surveillance camera can be further shortened.

  Further, the thumbnail image displayed in the camera information display area 54 can be updated to the latest image by clicking the update button 59 displayed in the other function display area 57 by operating the mouse. Yes. In this case, the control unit 42 inputs a signal by a mouse operation for clicking the update button 59 via the display control unit 41, and controls the network processing unit 33 in response to the signal, thereby Request "packets are created and transmitted sequentially to each IP address stored in the IP address storage unit 39. The transmitter 21 that has received the above-described “still image request” packet creates a still image packet and transmits it to the terminal 31 as described above. When the terminal 31 receives the still image packet, the transmitter 21 receives the still image packet as described above. Then, thumbnail image data is created and stored in the thumbnail image memory 38. Based on the newly stored thumbnail image data, the display control unit 41 displays the thumbnail image on the screen of the monitor display 32, so that the thumbnail image displayed in the camera information display area 54 is the latest image. Can be updated.

  Further, when the display switching button 58 displayed in the other function display area 57 is clicked by operating the mouse, the display of the camera information display area 54 is changed to the character information shown in FIG. The display is made up of only the address and installation location 56). In this case, the display control unit 41 responds to a signal by a mouse operation for clicking the display switching button 58, and the IP address stored together with the thumbnail image data in the thumbnail image memory 38 and the address-installation location correspondence table memory 40. From this data, only character information may be displayed in the camera information display area 54. Alternatively, the display control unit 41 inputs the IP address data of all the monitoring cameras 22 stored in the IP address storage unit 39, and the table stored in the memory 40 from the IP address of each monitoring camera 22. , The data of the installation location of each monitoring camera 22 is acquired, the monitor display 32 is controlled, and only the character information (IP address and installation location) is displayed in the camera information display area 54. May be. Further, in the case of the display screen of FIG. 4, by operating the mouse and dragging and dropping certain character information 56 to the desired moving image display area 53, the character information 56 is displayed in the same manner as in FIG. A moving image captured by the corresponding monitoring camera can be displayed in a desired moving image display area 53. Also, the display order of the character information 56 in FIG. 4 is displayed in the order from the highest display priority, for example, from the top to the bottom line of the camera information display area 54. The display priority in this case may be the same display priority as in the case of FIG. 4, when the display switching button 58 displayed in the other function display area 57 is clicked, the display is switched to the display screen of FIG. 3 in which the thumbnail image 55 and the character information 56 are displayed in the camera information display area 54. It is done.

  It should be noted that the predetermined time interval for sending the above-mentioned “presence confirmation request” packet stored in the control unit 42 is configured such that the predetermined time interval can be set or changed by operating the keyboard or the like. Yes. For example, when a setting button (not shown) is displayed in the other function display area 57 of the display screen of FIGS. 3 and 4, and the setting button is clicked, the display control unit 41 monitors in response to the click operation. A screen for setting the above-mentioned fixed time or the like is displayed on the display 32, and a desired time is written or rewritten to a desired time by operating the keyboard or the like on the display portion of the fixed time on the screen. A signal corresponding to the operation may be input to the control unit 42 via the display control unit 41 so that the predetermined time interval can be set or changed.

  In the present embodiment, a single monitoring unit 3 has been described. However, a plurality of monitoring units 3 may be provided. Further, the thumbnail image may be created not by the monitoring unit 3 but by each camera unit 2, but it is preferable that the thumbnail image be created by the monitoring unit 3 as in the present embodiment. For example, when a plurality of monitoring units 3 including a first and a second monitoring unit are provided and a moving image captured by a certain camera unit 2 is displayed in the first monitoring unit 3, In the second monitoring unit 3, when the thumbnail image displayed in the camera information display area 54 is updated to the latest image, a thumbnail image is created while creating and sending a moving image packet in the camera unit 2 described above. This is not preferable because it takes a great load. In addition, it is not preferable to provide a thumbnail image creation function in each of a larger number of camera units 2 than the monitoring unit 3 because the cost of the entire monitoring system increases.

  The present invention is useful for a surveillance system including a large number of surveillance cameras.

It is a block diagram which shows the structure of the monitoring system of embodiment of this invention. It is a block diagram which shows the function structure inside the monitoring system of embodiment of this invention. It is a figure which shows the example of a display of the screen of the monitor display of the monitoring system of embodiment of this invention. It is a figure which shows the other example of a display of the screen of the monitor display of the monitoring system of embodiment of this invention.

Explanation of symbols

1 Network 2 Camera Unit 3 Monitoring Unit 21 Transmitter 22 Monitoring Camera 31 Terminal 32 Monitor Display

Claims (6)

Dividing the entire display area of the screen to have the camera information display area and the moving image display area, the display priority to the thumbnail images the still image is reduced to be photographed at a predetermined timing by each of the monitoring cameras multiple A moving image captured by the monitoring camera corresponding to an arbitrary thumbnail image selected from the displayed thumbnail images is displayed from the top to the bottom row of the camera information display area in descending order. Image display means for displaying in the moving image display area;
Selection operation means for performing an operation for selecting the arbitrary thumbnail image from the thumbnail images displayed in the camera information display area ,
A monitor display device configured to change the display priority so that the display priority becomes higher as the number of times or accumulated time of moving images captured by the monitoring camera corresponding to the thumbnail image is increased. . The monitor display device according to claim 1, further comprising means for updating the thumbnail image to a latest image. The image display means divides the entire display area of the screen so as to have the camera information display area and the plurality of moving image display areas,
The selection operation means performs an operation for selecting the thumbnail image corresponding to the surveillance camera that captures the moving image displayed in the moving image display area, and also corresponds to the selected thumbnail image. The monitor display device according to claim 1 , wherein an operation for selecting the moving image display area in which a moving image captured by the monitoring camera is displayed from the plurality of moving image display areas is performed. The image display means is configured to display a character string indicating information related to the monitoring camera corresponding to each thumbnail image in the camera information display area in association with each thumbnail image. The monitor display apparatus in any one of Claims 1-3 . The selection operation means can be operated to select a character string indicating information related to the monitoring camera corresponding to the thumbnail image, and selecting the character string selects the thumbnail image. The monitor display device according to claim 4 , configured to be equivalent to selecting. A plurality of camera units each including a monitoring camera, and a monitoring unit including the monitor display device according to any one of claims 1 to 5 ,
The camera unit has transmission means for transmitting still image data and moving image data captured by the monitoring camera to the monitoring unit via a communication line;
The monitoring unit includes receiving means for receiving the still image data and moving image data transmitted from the transmitting means of the camera unit via the communication line, and the image display means of the monitor display device is Converting the still image data received by the receiving means into thumbnail image data, displaying a thumbnail image in a camera information display area based on the thumbnail image data, and receiving the moving image received by the receiving means A monitoring system configured to display a moving image in a moving image display area based on image data.

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