KR100511173B1 - Remote digital video recording system - Google Patents

Abstract

The present invention relates to a digital image management method and system using a network camera, and more particularly, to monitor the captured image data by transmitting a plurality of image data captured by the network camera to a central digital image management server through the Internet. The present invention relates to a digital video management method and system using a network camera that enables centralized control of security.

A system for managing digital images at the center by transmitting image data captured by a camera according to the present invention through a network is configured to control the resolution of an electrical image signal generated by photographing a predetermined space and to adjust the resolution of the image data. A network camera transmitting image management information corresponding to the image data; And a digital video management server which receives the video data and the video management information from the network camera and stores the video data and the video management information in a predetermined video database in association with user information associated with the network camera. A user interface unit in the form of a web page for receiving an inquiry about the image data associated with the web page; An image search unit for searching image data corresponding to the user who requested the inquiry by referring to the image database; And an image providing unit for transmitting the retrieved image data to a terminal of the user through a network.

According to the present invention, since the centralized monitoring of the video data distributed and photographed in small units, it is possible to obtain the effect of reducing the cost and manpower according to the security system construction.

Description

Remote digital video recording system {REMOTE DIGITAL VIDEO RECORDING SYSTEM}

The present invention relates to a digital image management method and system using a network camera, and more particularly, to transmit a plurality of image data captured by a remote network camera located in various areas to a central digital image management server through the Internet The present invention relates to a digital image management method and system using a network camera, which can be stored in a digital image management server and centrally control surveillance and security of captured image data.

Conventional surveillance systems mostly use CCTV (Closed Circuit TV). However, CCTV surveillance system is basically a system for remote surveillance because it operates by receiving a video captured by the camera through a coaxial cable to a predetermined surveillance system and outputting it through a display. have. In addition, since a recording medium such as a magnetic tape is used to record an image, a plurality of recordings not only deteriorate the image quality but also require a lot of time to search for a predetermined image. In addition, there is a problem that the overall system management, such as replacement of the magnetic tape is very difficult if no personnel reside in the monitoring system.

As an alternative to the CCTV surveillance system based on the conventional analog system, a DVR (Digital Video Recorder) system has been devised. The DVR system converts the captured image data into digital data and stores the image data in a hard disk, so that there is no change in the image quality of the captured image during recording and playback, and it is easy to manage the storage medium. In addition, the DVR system can be used for crime prevention and control of stores, offices and other areas by using a dedicated line and a terminal connected to the Internet. The DVR system monitors the surveillance zone with video and audio from a remote location using the Internet, and saves the video and audio for later analysis. This DVR system is being adopted as a very important application for security.

However, because the DVR system is expensive equipment, it is difficult to adopt in a small shop or store. In general, the price of a surveillance camera is relatively inexpensive. However, a DVR storing an image photographed by the surveillance camera is expensive, and its operation is not easy, so it is difficult for the general public to manage. For this reason, companies employing a DVR system and the like maintain a security system by separately employing a dedicated agent for managing the DVR system.

Meanwhile, there is a demand for adopting a security system such as a DVR in a small private company, a store, a store, or a private house in addition to a company, a bank, a public office, etc., which are currently adopting a DVR. However, these small shops do not adopt the DVR system due to cost and management difficulties. Therefore, there is an urgent need for a security service system that can easily be used in small shops and the like.

In addition, customers who are currently using DVR system should purchase additional hard disk if the capacity of hard disk for storing video data is insufficient. Since there is no choice but to look at it as a whole, there is a problem in that a storage device such as a hard disk cannot be efficiently used.

In addition, when a user wants to view the video stored in the DVR, the user may go to the place where the DVR is located or go to the place where the central control server connected to the DVR provided by some prior art could see the image stored in the DVR. In the case of the central control server of the prior art, the remote control is connected to the DVR to receive and play the video stored in the DVR or to manage the DVR. Therefore, there was a problem that you can not see the video recorded by surveillance cameras, such as their company anytime, anywhere.

Therefore, there is a need for a system and a method capable of satisfying the needs of modern people who require a safe and convenient life by expanding the security area to small buildings, stores and homes.

The present invention has been made to improve the prior art as described above, it is an object of the present invention to provide a security service system and method that can use a security function provided by the DVR at a low cost even in a small building, stores or homes. That is, an object of the present invention is to provide a broadband surveillance system by extending the security area limited to a large workplace or a place where security and surveillance are necessary to a general home or a small workplace.

In addition, the present invention is to install only the surveillance camera in the space requiring the security service, and to store the image taken by the surveillance camera in the central security system, when the user wants to use the security service to install the equipment The purpose is to minimize the time required and the time and cost required to manage the equipment. That is, in the case of the DVR according to the prior art, it took a lot of time and money to install and manage the same, but it aims to provide the user with a security function provided by the DVR while minimizing such time and cost.

In addition, an object of the present invention is to use the hard disk efficiently by storing the image data transmitted from the surveillance cameras of a plurality of sites in the central security system, and thus to reduce the overall security service provision cost.

In addition, the present invention by centrally monitoring the video data transmitted from the surveillance cameras of a plurality of sites, by centralizing the DVR management and surveillance personnel employed separately for each site according to the prior art, reducing the overall security service provision cost It aims to do it. In this regard, since the video data that can be monitored in real time by the surveillance personnel is part of the plurality of transmitted image data, the present invention provides an efficient method of selecting the image data to be provided to the surveillance personnel from the plurality of image data. It aims to do it.

It is another object of the present invention to overcome the temporal and spatial constraints of security by gathering video data taken from multiple locations into one place, and also to provide a method and system for enabling users to secure expenses in real time regardless of time and place. It is.

Another object of the present invention is to provide a network camera that can be used in the security service of the present invention. That is, a network camera capable of efficiently transmitting data by transmitting image data to the central security system through the Internet and transmitting the image data to the central security system at various resolutions rather than a uniform resolution in this case. It aims to provide.

It is still another object of the present invention to provide a transmission format capable of efficiently transferring data from a network camera to a central security system, and a storage format capable of efficiently performing storage and retrieval.

In order to achieve the above object and to solve the problems of the prior art, a system for managing a digital image in the center by transmitting the image data photographed by the camera according to the present invention through a network is an electrical image signal generated by photographing a predetermined space A network camera transmitting image data of which the resolution is adjusted and image management information corresponding to the image data by adjusting a resolution of the camera; And a digital video management server which receives the video data and the video management information from the network camera and stores the video data and the video management information in a predetermined video database in association with user information associated with the network camera. A user interface unit in the form of a web page for receiving an inquiry about image data associated with a user; An image search unit for searching image data corresponding to the user who requested the inquiry by referring to the image database; And an image providing unit for transmitting the retrieved image data to a terminal of the user through a network.

According to an aspect of the present invention, a camera for transmitting captured image data to a digital image management system through a network includes lens means; Imaging means for converting light input through said lens means into electric charges and outputting it as an electric image signal; An image manager for adjusting the resolution of the electrical image signal; And an image transmitter configured to provide an internet access capability and to transmit the image data having the adjusted resolution together with the image management information corresponding to the image data to the digital image management system.

Hereinafter, with reference to the accompanying drawings will be described in detail a digital image management method and system using a network camera according to an embodiment of the present invention.

1 is a diagram showing a network configuration for providing a digital video management system (remote digital video recording system) according to the present invention.

The present invention includes a network camera 110, a subscriber 120, a user terminal 130, and a digital image management server 140.

The network camera 110 is a predetermined device that converts light input through the lens into electric charge and outputs the electric image signal. According to an embodiment of the present invention, the network camera 110 may transmit and receive audio and video data in real time using the RTP / RTSP / RTCP scheme, which is a protocol used in H.323. RTP does not retransmit data at the cost of less overhead. Therefore, the RTP method can detect packet loss by synchronizing audio and video data streams using the time stamp and sequence number in the header and maintaining real time.

The network camera 110 adjusts the resolution of an electric video signal generated by photographing a predetermined space to digitally manage the video data and the video management information corresponding to the video data through the network. Send to The image management information may be information regarding a location where the network camera 110 is installed. The network camera 110 may receive a predetermined control command from the digital image management server 140 in association with the resolution and adjust the resolution according to the received control command.

Since the network camera 110 does not have a limitation of resolution, video data without motion is usually taken at low resolution, and important video data is taken at high resolution. The network camera 110 transmits image data having a resolution adjusted for the user terminal 130 to the user terminal through a network in real time.

The network camera 110 receives a predetermined control command corresponding to the image data transmitted from the digital image management server 140 through the Internet and performs a predetermined operation according to the received control command. The predetermined control command may be varied as "siren ringing", "lighting a warning light", "raising a speaker", and the like. The control command may be received from the digital image management server 140 and executed.

In addition, the network camera 110 may store the image data having the adjusted resolution for a predetermined period and resave the newly processed image data in the same storage device after the predetermined period. The network camera 110 may store image data for a predetermined period of about 10-20 minutes in order to prevent loss of important image data due to a network error or failure of the digital image management server 140.

The network camera 110 may receive image data photographed by the external camera in cooperation with the external camera and transmit the image data to the digital image management server 140 through the network. The external camera may be a channel expansion CCD camera, and the network camera 110 may maintain and store image data photographed by the external camera for a predetermined period. In addition, the network camera 110 may include a device such as a sensor and a motion detection, and may detect a predetermined motion using such a device.

Subscriber 120 (or user) asks a remote video security provider to subscribe to a service in order to secure and monitor a predetermined space. Subscriber 120 may be a manager who operates a small store, or may be a general household. On the other hand, in the case of the service according to the present invention, since the cost is lower than installing and managing the digital video recorder at each site as in the prior art, the service according to the present invention even in a large company currently equipped with a digital video recorder is installed. You can request to join. According to the related art, the owner 120 of a small store or a general household has a problem that it is difficult to install a digital video recorder such as a large company due to cost, or even difficult to manage. However, according to the present invention, such a small business or individual can also be provided with a high level of security service by simply subscribing to the service according to the present invention and paying a low service fee.

Therefore, when the subscriber 120 according to the present invention asks the remote video security service provider to install a network camera in order to photograph a plurality of areas and a plurality of spaces, the remote video security service provider installs the network camera at a site designated by the subscriber. Connect the network camera to the Internet. Then, the remote video security service provider receives the video data from the network camera and stores it in the digital video management server 140 according to a contract defined in accordance with the contract conditions (for example, may record only a specific time zone at a specific resolution). do.

In addition, the subscriber 130 accesses the digital image management server 140 using its user terminal 120, performs user authentication, and then is recorded by the network camera of the site or is currently being photographed. You can view the video. To this end, the digital image management server 140 of the present invention includes a web server, so that the subscriber can access the web server to authenticate the user and then view the corresponding image.

In addition, the subscriber 120 may set a storage period, frame per second (FPS), resolution, and the like, for image data stored for its site. In this case, the remote video security service provider may provide a plurality of fee systems, and charge the subscriber based on the information set by the subscriber.

The user terminal 130 is a device that transmits or receives data through the Internet, and includes various types of terminals such as WAP phones, PDAs, notebook computers, and PCs that can receive and express data. The subscriber 120 may access the digital image management server 140 through the network to retrieve the captured image data by using the user terminal 130. In addition, the subscriber 120 may receive a predetermined program from the digital image management server 140, install the same in the user terminal 130, and transmit the captured image data to the user terminal 130. In this case, the subscriber 120 may monitor image data captured in real time without having to access the digital image management server 140.

The remote image security service provider may be requested to install a network camera from the subscriber 120, and the network camera may be installed at the desired number and location of the camera. Image data captured by the installed network camera can be transmitted to the digital image management server 140 or the user terminal 130 in real time. The digital image management server 140 may receive a storage condition including storage period information or FPS information corresponding to the image data photographed from the subscriber 120 requesting installation and store the storage condition in the user database.

For example, the storage period information may store and store the captured image data in units of two months so that the image data older than two months may be discarded and the corresponding charge may be changed. As the storage period information increases, the digital image management server 140 increases the amount of image data that needs to be stored and managed, and thus, a predetermined storage period may be set by the subscriber, thereby efficiently using the limited storage space. The FPS information is set to how many frames per second the image data is received and stored so that the quality of the captured image data varies depending on the case of receiving a large number of frames per second and a small frame per second. This may vary. Accordingly, since the digital image management server 140 considers important criteria among a plurality of image data corresponding to the plurality of subscribers 120, the subscriber 120 may set predetermined criteria according to the image data. . Such predetermined criteria may be applicable to monitoring for maintaining a plurality of image data photographed in a plurality of regions and a plurality of spaces.

In addition, the digital image management server 140 receives image data captured by the network camera 110 through a network and stores the received image data in an image database in association with a user associated with the image data. The digital image management server 140 receives image data and image management information corresponding to the image data from the network camera 110 as a single file and stores the image data in a video database. The digital video management server 140 may store the data according to the storage period information and the FPS information set by the subscriber 120. The digital image management server 140 receives an inquiry about image data associated with the user from the user. The digital image management server 140 searches for image data corresponding to the user who requested the inquiry by referring to the image database and transmits the retrieved image data to the user terminal 130 through the network.

As described above, the digital video management system according to the present invention stores the video data transmitted from the surveillance cameras of a plurality of sites, thereby efficiently using the hard disk, thereby reducing the overall security service provision cost. That is, in the related art, since DVRs are separately installed, even if the HDD capacity of the DVR used by one user remains, it cannot be used differently. In addition, if the HDD capacity of a DVR used by a user is insufficient, an additional hard disk had to be purchased. However, according to the present invention, users can pay a subscription fee for the service, and since the hard disk is shared by a plurality of subscribers, the hard disk can be managed efficiently. Users who need additional storage only pay extra for that. For example, if 20 Mbytes of additional storage space is needed, the user cannot purchase a 20 Mbyte hard disk on the market, but the user has no choice but to purchase a 1 Gbyte hard disk that is much larger than this. You only pay for 20 Mbytes of storage.

The digital video management server 140 receives emergency response information corresponding to user information and event information from the subscriber 120 and stores the emergency response information in the emergency response database. The user information is predetermined user information including a user identifier, a password, contact information of the user (user's mobile number or e-mail), etc., and the digital video management server 140 may handle the emergency when an emergency occurs. When you need information. The event information is a command that can be processed by the digital image management server 140 when a predetermined emergency situation is captured in the captured image data. The digital image management server 140 receives the image data or the situation information data, interprets the received image data or the situation data, and retrieves the corresponding emergency action information by referring to the user information and the event information of the emergency action database. The digital image management server 140 processes a predetermined control command according to the retrieved emergency action information. The emergency action information includes a control command for the network camera, and transmits the control command to the network camera to perform an action for the emergency situation.

In addition, the digital image management server 140 selects a predetermined number of image data from among a plurality of image data received from a plurality of network cameras according to a predetermined priority and outputs the image data to a monitoring screen in real time. The digital image management server 140 may set the priority of the image data in which the motion is detected among the received image data to be higher than the priority of the image data in which the motion is not detected. The digital video management server 140 may store the type of the service provided by the user in a predetermined user database, and the priority may be determined according to the type of the service. For example, the digital video management server 140 may set the priority of monitoring from the subscriber 110 and charge differentially according to the set priority.

2 is a block diagram showing an example of an internal configuration of a digital video management system (remote digital video recording system) according to the present invention.

The digital image management system 200 may include an image receiver 210, a user interface 220, an image provider 230, an image monitor 240, an image search unit 250, an emergency response search unit 260, The first aid processor 270, the image database 280, the first aid database 290, and the user database 295 are included.

The image receiver 210 receives image data photographed from a network camera through a network. The image receiving unit 210 receives image data and image management information corresponding to the image data from a network camera as a single file. The image management information may include one or more of user information, camera group information, location information, camera type, and date / time information corresponding to the image data. Since the image management information includes all the information related to the image data in the received image file, it is easy to maintain and manage the image data and has a good expandability. Detailed description of the image management information will be described later with reference to FIGS. 3A and 5.

The user interface 220 is an interface for receiving an inquiry about image data associated with a user and may be provided in the form of a web page. When the user interface 220 receives an inquiry of predetermined image data from a user connected through a network, the user interface 220 undergoes a user authentication process for requesting an inquiry. For example, the user interface 220 may request input of a user identifier and a password from a user who requests image data inquiry. Since the image data according to the present invention is related to security, access to the image data is a very important problem. According to the present invention, the user is allowed only access to the image data related to him, and access to other image data is Since it is not allowed, security for the image data is guaranteed.

In addition, the user interface 220 receives a date or time associated with image data, and accordingly, the image search unit 250 searches for image data of a corresponding date or time among image data of the corresponding user and provides the same to the user. do. To this end, as described later, image data and image management information are maintained in a single file.

The user interface unit 220 may provide a web page screen for receiving information necessary for installing the network camera to any user who wants to install the network camera. The user interface unit 220 may receive various information such as user information, camera installation location information, camera number information, storage period information, FPS information, etc. from a user who has requested to install the network camera and store the information in a database. have.

According to another embodiment of the present invention, the user interface 220 receives a storage condition of the image data associated with the user from the user, the image data associated with the user among the image data received through the image receiving unit 210 Stores in the image database 280 according to the storage condition. For example, the user may include frame per second (FPS) information or storage period information as a storage condition of the image data. When the user inputs a storage condition to store the image data input from the network camera of his site at 10 FPS, the digital image management server identifies the image data associated with the user among the image data received by the user, and the image Data is stored at 10 FPS. In this case, the digital image management server may change and store the received image data according to the storage condition. According to the present embodiment, since image data may be stored under different storage conditions for each user, a customized service is possible according to each user's request. For example, some users may want a low FPS or low resolution but low cost service, and another user may want a high cost but high resolution or high FPS storage condition. The present invention can accommodate all of these individual user needs.

According to another embodiment of the present invention, the digital video management server transmits a control command to the network camera based on the storage condition, and accordingly, the network camera generates image data corresponding to the storage condition (adjusting the resolution). To the digital video management server. According to the present embodiment, since the network camera adjusts the resolution and transmits, unnecessary waste of bandwidth can be reduced.

The image provider 230 transmits the image data retrieved by the image retrieval unit 250 to a user terminal through a network. The image providing unit 220 provides the image data searched by the image searching unit 250 as a web page to a predetermined web server, and the user can monitor the image data by accessing the web server using his terminal. Can be. Alternatively, the image providing unit 220 may directly transmit image data to the user terminal 130 according to a user's request so that the image data may be monitored by the user terminal (eg, a mobile phone).

The image monitoring unit 240 selects a predetermined number of image data from among a plurality of image data received from a plurality of network cameras according to a predetermined priority and outputs the image data to the monitoring screen in real time. Since the video monitoring unit 240 has limited equipment and manpower for monitoring the video data, it is impossible to monitor all the plurality of video data. Accordingly, the image monitoring unit 240 may monitor the image data according to the user's request or the image data detected a predetermined movement of the received image data. In the present invention, the video data received by the digital video management server cannot be compared with the video received by the digital video recorder installed at one site. For example, in the present invention, the digital video management server may receive video data from network cameras of hundreds of subscribers. In this case, it is very difficult for all of the hundreds of image data to be displayed on the screen and monitored by a person (monitoring person). Therefore, the present invention selects some of the image data according to the priority among the plurality of image data thus received and displays it on the monitoring screen so that the monitoring person can monitor.

For example, the image monitoring unit 240 may set the priority of the image data in which the motion is detected to be higher than the priority of the image data in which the motion is not detected. In addition, the image monitoring unit 240 selects the type of service from the user and stores it in the user database 295 so that the priority can be determined according to the type of the selected service. Type of service "always monitoring". "Monitoring on motion detection", "Monitoring by time" can be variously set. Accordingly, the image monitoring unit 240 may select a "always monitoring" service from the user, monitor in real time, and charge the user a predetermined charge accordingly. Alternatively, the image monitoring unit 240 may receive a "monitoring between 12 o'clock and 4 o'clock" service from the user and may monitor the time between 12 am and 4 o'clock in the morning. In this way, if the subscriber pays more, the more time the monitoring service can be provided. In addition, when a specific event occurs (for example, when the doors are opened in the offices of all the companies who have left office or when motion is detected), the priority may be set to a very high level and displayed on the monitoring screen.

The image search unit 250 searches for image data corresponding to the user who requested the inquiry by referring to the image database 280. The image search unit 250 searches for image management information corresponding to the image data. The image retrieval unit 250 retrieves information corresponding to the user who requested the inquiry from the image management information and extracts image data corresponding to the retrieved image management information. The image search unit 250 transmits the extracted image data to the image provider 230 to provide the image data to the user.

The emergency response search unit 260 receives image data or situation information data from the network camera through the image receiver 210 and interprets the received image data or situation information data. Next, the emergency response search unit 260 searches for emergency response information by referring to user information and event information of the emergency response database 290. The emergency action database 290 stores emergency action information corresponding to user information and event information. For example, it may include first aid information about what emergency action should be taken when an event occurs at a site related to a user. An example of an emergency action database is shown in FIG. 3B.

For example, event information indicating that a door is opened to a specific site through the user interface 220 arrives. The event information may be included in image management information to be described later and transmitted. Then, the emergency response search unit 260 may search for the emergency response in the emergency response database 290 by referring to the user information related to the event information (which is also included in the image management information). As such, since all the additional information such as event information and user information is included in the video management information and transmitted to the digital video management server, the emergency response information corresponding to the video management information can be searched. As another example, the image monitoring unit 240 detects image data containing a thief while monitoring the captured image data. The emergency response search unit 260 receives an acknowledgment signal about the image data containing the thief from the image monitoring unit 240, and searches the event information corresponding to the “thief image data” by referring to the emergency action database 290. do. When the event information corresponding to "theft image data" is searched for, the emergency action search unit 260 searches for emergency action information corresponding to the retrieved event information. The emergency response search unit 260 transmits the retrieved emergency response information to the emergency response processing unit 270.

The emergency action processor 270 processes a predetermined control command according to the emergency action information retrieved by the emergency action search unit 260. For example, the emergency action information includes a control command for the network camera, and the emergency action processor 270 transmits a control command for the network camera to the network camera to perform an action for the emergency. For example, when a movement of a specific point (one of the photographed spaces) is detected by the network camera that is photographing while rotating left and right, a command to fix only the point may be transmitted to the network camera.

First aid processing unit 270 receives first aid information from first aid search unit 260, if the received first aid information is "inform the security company," contact the security company by wire or wireless telephone or message You can also take care of notifying the thief. Event information and emergency response information corresponding to the event information may vary depending on the subscriber.

According to another embodiment of the present invention, the image receiving unit 210 receives image data and image management information corresponding to the image data from a network camera as a single file. Then, the image database 280 stores the received image data and image management information in a storage device such as a hard disk as it is. As such, the received data can be directly stored in the storage device without any additional processing, thereby reducing the overhead associated with the storage processing. In addition, since the image retrieval unit 260 may retrieve the image data requested by the user using image management information of the file stored in the image database 280, the image retrieval unit 260 may efficiently process the user's retrieval request.

A detailed description of the database such as the image database will be described below with reference to the drawings.

3A illustrates an example of data stored in an image database according to the present invention.

The image database 300a includes camera group information 315, location information 320, camera type 325, and date / time information 330 corresponding to the user identifier 305, the image data 310, and the image management information. do.

The user identifier 305 is a delimiter for identifying a user and includes information associated with the user. For example, in the drawing, the user identifier 305 may be represented by "aaa" or "bbb", or may be represented by various information such as a user name and a user alias.

The image data 310 is image data photographed by a network camera. The image data 310 may be stored in various forms using a M-JPEG or MPEG method known in the art as a compression method of digital data. In the figure, it can be seen that the image data 310 is stored as a "image1.jpg" file. The user may set the FPS information corresponding to the quality of the image data 310 and store the image in the image quality corresponding to the set FPS information.

In addition, the camera group information 315 may be grouped according to the size and nature of the network camera or grouped by the company requesting the installation of the network camera in association with the image management information. For example, in the drawing, the camera group information 315 is set to "convenience store" so that it can be recognized that the predetermined subscribers are grouped into convenience stores.

The location information 320 may be classified according to the area name and the building in which the camera is installed in association with the camera group information 315 in order to distinguish the cameras installed in the plurality of areas. There may be several cameras installed in a predetermined space, and since a location photographed by one camera may be different in the same space, the image data may be different accordingly. Therefore, the location information 320 is set corresponding to one camera. In the figure, it can be seen that the location information 320 is stored as "camera1" in Gangnam-gu corresponding to the image data "image1.jpg".

In addition, the camera type 325 allows to identify the specifications of the installed camera. Network cameras may have different specifications according to various functions, and upgraded products with new functions may come out. Accordingly, camera type 325 identifies and displays the specifications.

The date / time information 330 records a date of photographing image data and a time corresponding thereto. The date / time information 330 may store the image data photographed from the network camera as the date and time accordingly to facilitate maintenance. In the figure, the date and time information 330 holds what was photographed on "May 3, 2004" corresponding to the image data "image1.jpg".

3B is a diagram illustrating an example of an emergency measures database according to the present invention.

The emergency action database 300b includes user information 305 or a user identifier, event information 335, and emergency action information 340.

The event information 335 includes predetermined situation information data associated with the image data. The event information 335 receives predetermined situation information data from the user and is stored in the emergency action database in association with the user. Referring to the drawings, the event information 335 may include various types of information such as "door opened", "shadow movement", "PC ON", and the like. The event information 335 may be selected by the user from among data determined to be an emergency in the system or may receive context information data from the user.

In addition, the emergency response information 340 is to be able to process a predetermined control command in association with the event information (335). The emergency response information 340 may directly contact a security company or a user according to a control command, or may transmit a predetermined control command to a network camera so as to process emergency measures. Referring to the digital image drawing, the emergency response information 340 includes a "ring alarm" control command in response to the event information "door open". In this case, the digital video management system 200 transmits a control command of "ringing the alarm" to the network camera, so that the digital video management system 200 can cope with an emergency situation. The emergency response database 300b may differently set emergency response information 340 according to the event information 335.

3C is a diagram illustrating an example of a user database according to the present invention.

The user database 300c includes a user identifier 305, a password 345, storage period information 350, FPS information 355, monitoring information 360, and billing information 365.

The password 345 is information required for user authentication in the digital video management server 140. The password 345 is not a user associated with the image data when the digital image management server 140 including the plurality of image data receives an inquiry about the image data from a certain user or requests the transmission of the image data. It is a delimiter to block a user who is illegally provided with image data. The password 345 is stored only in association with a user associated with image data associated with a network camera, and is information that requires thorough security at the user and the digital image management server.

The storage period information 350 is period information for storing the received image data. The storage period information 350 is important information necessary for maintaining and managing image data. The billing information 365 that can be requested from the user may vary according to the storage period information 350. Referring to the drawing, the storage period information 350 is set to "2 months", and the charge accordingly may be determined. The digital video management server 140 may set the storage period information 350 differently according to a user, thereby efficiently using the storage space.

In addition, the FPS information 355 is information for setting how many frames per second image data is received and stored. The FPS information 355 determines the image quality of the image data according to the number of frames received per second. Therefore, as shown in the figure, the FPS information 355 is set to "20ms" from the user and receives 20 frames per second from the network camera. The FPS information is set by the user according to the importance of the image data, and there is a difference in charging according to the set index.

The monitoring information 360 is information for maintaining and managing a plurality of image data photographed in a plurality of regions and a plurality of spaces. The monitoring information 360 receives the priority of the image data associated with the user from the user. The monitoring information 360 may be represented in various forms, and may be monitored in real time according to the importance of the image data. In the figure, the monitoring information 360 is set to "medium" so that a certain movement can be detected or monitored only during a predetermined time period. The user may set the monitoring information 360 and pay the bill accordingly.

The billing information 365 is money information requested by the user according to a predetermined cost incurred in association with various information set according to the user.

4 is a block diagram showing an example of an internal configuration of a network camera according to the present invention.

The network camera 400 may include the lens unit 410, the imaging unit 420, the image manager 430, the image transmitter 440, the command receiver 450, the operation unit 460, and the image storage unit 470. Include.

Lens means 410 is a means for collecting or diverging light from an object to form an optical image. The imaging unit 420 converts light input through the lens unit 410 into electric charge and outputs the electric image signal.

The image manager 430 adjusts the resolution of the electrical image signal. When the image management unit 430 continuously transmits the captured image data at the same resolution, the network load increases, and thus the image management unit 430 adjusts and transmits the resolution according to the image data. Since the network camera adjusts the resolution of the image data by using the image manager 430, the network camera can provide various resolutions by reducing the load on the network and improving the conventional uniform resolution. The image manager 430 generates image data in low resolution at a predetermined time or transmits the image data to the digital image management system through the image transmitter 440. In addition, the image manager 430 may determine the captured image data in real time and transmit only the data having a difference in all screens to the digital image management system 200. According to another embodiment of the present invention, the image management unit 430 is to shoot in high resolution when a predetermined motion is detected by using a predetermined sensor and a motion detector.

Also, the image manager 430 may receive a resolution control command corresponding to the image data from the command receiver 450 and adjust the resolution of the image data according to the received control command.

The image transmitter 440 provides the Internet connection capability and receives the image data having the adjusted resolution from the image manager 430 and transmits the image data with the image management information corresponding to the image data to the digital image management system 200. According to the prior art, the surveillance camera generates the captured image as an NTSC or PAL analog video signal and transmits it to the DVR, and does not separately adjust the resolution of the video signal. However, in the present invention, if the image captured by the network camera is transmitted to the digital image management server at a fixed resolution, it is not suitable for various applications. Therefore, the present invention adjusts the resolution of the image signal received by the image management unit and transmits the image signal whose resolution is adjusted through the image transmission unit to the digital image management server. In the case of a DVR connected to a conventional surveillance camera, it is installed at a short distance as in the same building and the transmission path is not shared with other communication lines. However, in the present invention, the network camera is connected to a digital video management server through a public network such as the Internet. Since the image data is transmitted, it is much more efficient to adjust and transmit the resolution within the network camera.

In addition, according to the present invention, the image transmission unit 440 not only transmits the image data but also generates image management information corresponding to the image data in one file and transmits the image management information to the digital image management system. The effect of this configuration will be described in detail later with reference to FIG. 5.

According to another embodiment of the present invention, the image transmitter 440 transmits image data having a resolution adjusted to be suitable for the user terminal to the user terminal through a network in real time. For example, in the present invention, image data may be transmitted from a network camera to a user terminal (PC, mobile phone, etc.). In this case, the image data may be adjusted in real time by adjusting the resolution according to the type of the user terminal receiving the image data. Send to the user terminal. According to the present embodiment, a user may view an image captured by a network camera installed at his site (store, etc.) in real time using his terminal.

According to another embodiment of the present invention, the image transmitter 440 may transmit the second image data captured by the channel expansion CCD camera connected to the outside to the digital image management system 200 through a network. .

According to another embodiment of the present invention, the command receiving unit 450 receives a predetermined control command from the digital video management system 200 through the Internet. For example, the command receiver 450 receives a resolution control command corresponding to the image data from the digital image management system. That is, the digital video management system designates the resolution of the video data transmitted by the digital camera remotely. Then, the image manager 430 adjusts the resolution of the image data according to the resolution control command received from the digital image management system, and transmits the adjusted image data to the digital image management system through the image transmitter 440. According to the present embodiment, the central digital video management system may receive image data by designating an appropriate resolution for each network camera. In this case, it may be determined according to the bandwidth of the network or the Internet used by the network camera, the type of service subscribed to by the subscriber of the network camera, and the like. For example, if a subscriber subscribes to a service that records a low resolution video at a relatively low cost, the subscriber sets the video data transmitted from the network camera at a low resolution, and then the subscriber records a relatively expensive but high resolution video. In the case of changing to a service, the central digital video management system may set the resolution of the video data transmitted from the network camera to a high resolution.

The command receiving unit 450 receives emergency action information from the digital image management system 200 in association with the transmitted image data or situation information data. The command receiving unit 450 transmits a control command of the received emergency action information to the operation unit 460 to process the emergency action.

The operation unit 460 receives a control command from the command receiving unit 450 and performs a predetermined operation according to the received control command. For example, if the received control command is to rotate the network camera to the right, the operation unit 460 may control the driving unit (not shown) of its own (network camera) to rotate the network camera to the right accordingly. When the received control command is “fluorescent lamp on”, the operation unit 460 may perform an operation of turning on the fluorescent lamp. In this case, the operation unit 460 is connected to a lighting device such as a fluorescent lamp to control the lighting device. The operation unit 460 may be connected to a predetermined device to cope with an emergency.

According to another embodiment of the present invention, the image storage unit 470 stores the image data of the adjusted resolution for a predetermined period, and re-stores the newly processed image data in the same storage device after the predetermined period. The image storage unit 470 may include a storage device such as a hard disk, and may not transmit image data captured in real time over a network, or may fail to transmit image data due to an error of the digital image management system 200. To store the image data for a predetermined period. For example, the image storage unit 470 may always store 15 minutes of image data. In the present invention, the network camera is used for security. If a theft accident occurs while the video data is not transmitted due to a network error or the like, it becomes a big problem when using the system of the present invention. Therefore, by including the image storage unit 470 in the network camera 400 to store certain image data, it is possible to preserve the image data in spite of a temporary network problem. In particular, in the present invention, a public network such as the Internet is used for the connection between the network camera and the digital video management server, and in this case, the bandwidth (transmission speed) from the network camera to the digital video management server may be reduced due to the temporary increase in network transmission. There is an image storage unit 470 to prepare for this case. In this case, since the storage device included in the network camera 400 has a high capacity, the cost increases, so that the image data stored in the past is erased by a rewrite method with a minimum size and new image data is stored in the storage space. Save it. The temporarily stored image data is transmitted to the digital image management server after the network problem is solved.

In addition, the image storage unit 470 may receive the second image data captured by the channel expansion CCD camera and store it for a predetermined second time period. That is, the network camera is connected to the channel expansion CCD camera, and the image storage unit 470 receives and stores the second image data from the channel expansion CCD camera. Since the network camera according to the present invention provides an Internet connection function and the like, the price is higher than that of a conventional CCD camera. Therefore, rather than configuring all the cameras installed at one site as the network camera of the present invention, one or a few network cameras are installed at one site, and the network camera and the normal CCD camera are connected to each other. When the captured image data is transmitted to the digital image management server through the network camera, the entire configuration can be made at a relatively low cost. In this case, the image received from the CCD camera is also stored in the network camera, thereby preparing for problems in network transmission.

The image storage unit 470 causes unnecessary waste of storage space when storing a plurality of image data. Therefore, the image storage unit 470 discards the image data stored for a predetermined time and stores newly processed image data after a predetermined period. In this way, the image storage unit 470 efficiently utilizes the limited resources, thereby maximizing the performance of the network camera.

5 is a diagram illustrating an embodiment of an image file including image data and image management information according to the present invention.

When the image data photographed by the network camera is transmitted by the network camera to the digital image management server, the image management information corresponding to the image data is transmitted together. The image management information may include site information, location information, event information, or image information. The site information includes information on the monitoring group name, size, personality, and the like, and may include, for example, a name of a subscribed customer such as "Seven Eleven", an identifier of the customer, and the like. The location information includes information regarding a location where the network camera is installed. For example, the location information may include address information displayed in text or latitude and longitude coordinates. The event information includes information on the reason (event) for which the video data is transmitted. For example, when an image is transmitted due to detection of a sensor connected to a network camera, information about the image is included. Image information includes information about an identifier of a camera, a type of camera, a model name of a camera, a manufacturer or shooting conditions, and the like.

The image data and the image management information associated with the image data may be generated and transmitted as one image file. In the drawing, the image file includes the remaining space except the space of the predetermined image data as the image management information. As described above with reference to FIG. 3A, the image management information may indicate an offset according to a field, a type, a size, and data corresponding to one piece of information. For example, the camera group information may have a "convenience point" as a field and may be expressed as a "character" type corresponding to the field. In addition, the camera group information is a size of “1 byte” and may have data information about the size.

In FIG. 5, the standard video portion includes video data and is transmitted, and the video data may use a standardized video format such as MPEG. In FIG. 5, the portion of the image management information is stored from the "offset for each information group" field to the portion labeled "data". The "offset field for each group of information" includes offset information for the division (group) of various data. For example, if the image management information is divided into four groups as described above, the "offset for each information group" field is composed of 4 bytes, where the first byte is offset to site information and the second byte is location information. offset for location information, a third byte stores an offset for event information, and a fourth byte stores an offset for image information. Each group of information includes zero or more pieces of information, each of which consists of a field, type, size, and data field. The field is information identifying what the corresponding information is. For example, the "field" may be "customer name" and may include information called "customer name". The "field" part may be a predetermined size, for example 10 bytes in size. Therefore, by reading the first 10 bytes from the "field" portion of the central digital video management server, it is possible to identify what is the corresponding information. The "type" part is information identifying what the type of "data" is. For example, it identifies whether it is text information, numeric information, or date information. The "size" part indicates the size of "data" in bytes. The actual data is entered into the "data" part. For example, "field" may be "customer name", "type" is "text", "size" is "20" (bytes), and "data" may be "seven eleven". "Seven eleven" typically has a size of 20 bytes). The data configuration as described above has been described as an example, and may be variously modified within the scope of the technical idea of the present invention.

Various information regarding the image management information may be expressed as described above to include various information related to the image data in one image file. Therefore, the digital video management system has an advantage of simple structure and good expandability. In addition, in the present invention, since image data is received from cameras installed at many sites, it is very difficult to classify and analyze such image data for storing. Therefore, the time required for classifying and analyzing the image data by transmitting the image management information together when transmitting the image data from the network camera as described above and storing the image data and the image management information in the format received in the digital image management server. Can reduce the storage speed. In addition, in the retrieval of image data later, the image management information can be used for retrieval, and additional information related to specific image data can be identified very easily. For example, when a monitor of a central digital image management center detects image data that is problematic while monitoring images received from a plurality of sites (for example, a screen in which a thief is invaded) is displayed. By directly retrieving the image management information transmitted along with the data, it is possible to immediately confirm the location where the network camera which transmitted the image data is installed, and thereby to cope quickly.

In addition, since it is not necessary to build a separate information database for the image received from the central digital image management center, its implementation and management becomes very easy. In addition, since the above-described operation is not necessary, the structure of the central system is relatively simplified, and its implementation is easy. Also, even when another supplier is going to build a system compatible with the present invention, the image management information is similar to the image data. Since it is transmitted together, it is very easy to build a system compatible with the present invention.

6 is a flowchart illustrating a procedure of a digital image management method according to the present invention.

First, in step S610, the digital image management system 200 receives image data captured by a network camera through a network. The digital image management system 200 receives from the network camera as a file including image data and image management information corresponding to the image data.

Next, in operation S620, the digital image management system 200 stores the received image data in the image database 300a in association with a user associated with the image data.

In operation S630, the digital image management system 200 receives an inquiry about image data associated with a user through a user interface unit. The digital image management system 200 may receive condition information from the user in association with image data. The condition information may include one or more pieces of image management information stored in association with image data. For example, the digital image management system 200 may receive an inquiry request for image data related to “May 13, 2004” from a user, and may retrieve image data corresponding to the input date and time information.

In operation S640, the digital image management system 200 searches for image data corresponding to the user who requested the inquiry by referring to the image database 300a. The digital image management system 200 extracts image data corresponding to the condition information received from the user from the plurality of image data associated with the user after the authentication process for the user requesting the inquiry.

Finally, the digital image management system 200 transmits the retrieved image data to the user terminal through the network. The digital image management system 200 may provide the retrieved image data as a web page screen to reproduce the image data or transmit the image data to a user terminal according to a user's request.

7 is a flowchart illustrating a procedure of processing emergency measures in the digital video management system according to the present invention.

First, in step S710, the digital image management server 140 stores emergency action information corresponding to user information and event information. The digital image management server 140 receives event information and emergency response information in association with image data from a user. The digital image management server 140 stores and manages the input event information and first aid information in the first aid database 300b.

Next, in operation S720, the network camera 400 transmits image data or situation information data to the digital image management server 140. The network camera 400 transmits image data or situation data captured in real time through the Internet to the network camera 400.

In operation S730, the digital image management server 140 receives image data or situation information data from the network camera 400 and interprets the received image data or situation information data. The digital video management server 140 analyzes whether the received situation information data corresponds to event information set by the user.

In operation S740, the digital image management server 140 searches for emergency response information corresponding to user information and event information by referring to the emergency response database 300b. The digital image management server 140 extracts a predetermined control command corresponding to the emergency action information.

In operation S750, the digital image management server 140 processes a predetermined control command according to the retrieved emergency response information. The digital image management server 140 transmits a predetermined control command to the network camera 400 to handle an emergency situation.

8A to 8D illustrate various embodiments of a digital video management system using a network according to the present invention.

Referring to FIG. 8A, the digital image management system 200 is requested to directly monitor image data captured by a user who has requested installation of a network camera at home. The digital video management system 200 assigns a fixed IP address to the user and transmits the captured image data in real time to the assigned IP address. Accordingly, the digital video management system 200 stores the video data to the user terminal through the assigned fixed IP address and monitors the data in real time.

As shown in FIG. 8B, the digital image management system 200 allocates a transmission path of image data captured by a network camera as a floating IP. The digital image management system 200 maintains image data photographed from a network camera in an IP server. The digital video management system 200 may receive a request for access to its own video data from the user, extract the requested video data from the IP server, and provide the same to the user through the WEB server.

As shown in FIG. 8C, the digital image management system 200 may install a network camera in a predetermined area or building, and maintain the predetermined image in a predetermined area or building where image data photographed by the network camera is installed. do. For example, the digital image management system 200 may install a network camera in an elevator, a parking lot, a playground, etc. in an "apartment", and install a central system in the guard room for image data captured by the network camera to maintain the image data. To help. Also, the central system may output the received image data to the monitoring screen. Apartment residents can access the central system via the Internet and receive video data.

Referring to FIG. 8D, the digital image management system 200 may maintain image data in association with a security company. The digital video management system 200 installs a network camera in a plurality of regions and manages the image data photographed from the network camera in cooperation with a security company. The digital image management system 200 may store image data in an IP server, and provide the stored image data to a user through a WEB server and a WAP server. The digital video management system 200 may handle emergency situations quickly and accurately in close cooperation with a security company when processing emergency measures in association with image data.

Embodiments of the invention also include computer-readable media containing program instructions for performing various computer-implemented operations. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The medium or program instructions may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. The medium may be a transmission medium such as an optical or metal wire, a waveguide, or the like including a carrier wave for transmitting a signal specifying a program command, a data structure, or the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention.

According to the present invention, there is provided a security service system and method that can use a security function provided by a DVR at a low cost even in a small building, a store or a home. That is, according to the present invention, it is possible to provide a broadband surveillance system by extending the security area limited to a large workplace or a place requiring security and surveillance to a general home or a small workplace.

In addition, according to the present invention, by installing only the surveillance camera in the space requiring the security service, and the image taken by the surveillance camera to be stored in the central security system, when the user tries to use the security service installation of equipment Time required for the management of the equipment and the time and cost can be minimized. That is, in the case of the DVR according to the prior art, it took a lot of time and money to install and manage the DVR, but according to the present invention, the security function provided by the DVR can be provided to the user while minimizing such time and cost.

In addition, according to the present invention, by storing the image data transmitted from the surveillance cameras of a plurality of sites in the central security system, it is possible to efficiently use the hard disk, thereby reducing the overall security service providing cost.

In addition, according to the present invention, by centrally monitoring the video data transmitted from the surveillance cameras of a plurality of sites, the centralized DVR management and monitoring personnel employed separately for each site according to the prior art, thereby centralizing the overall security service costs This is reduced. In this regard, since the video data that can be monitored in real time by the surveillance personnel is part of the plurality of transmitted image data, the present invention provides an efficient method of selecting the image data to be provided to the surveillance personnel from the plurality of image data. do.

In addition, according to the present invention, by collecting the image data photographed at various places in one place to overcome the time and space constraints of security, users can also use the security service in real time regardless of time and place.

According to the present invention, there is also provided a network camera that can be used in the security service of the present invention. That is, a network camera capable of efficiently transmitting data by transmitting image data to the central security system through the Internet and transmitting the image data to the central security system at various resolutions rather than a uniform resolution in this case. Is provided.

In addition, according to the present invention, there is provided a transmission format that can efficiently transfer data from a network camera to a central security system, and a storage format that can efficiently perform storage and retrieval. Accordingly, it is possible to efficiently transmit, store, and retrieve the received image data and related information.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above-described embodiments, which can be variously modified and modified by those skilled in the art to which the present invention pertains. Modifications are possible. Accordingly, the spirit of the present invention should be understood only by the claims set forth below, and all equivalent or equivalent modifications thereof will belong to the scope of the present invention.

1 is a diagram showing a network configuration for providing a digital video management system (remote digital video recording system) according to the present invention.

2 is a block diagram showing an example of an internal configuration of a digital video management system (remote digital video recording system) according to the present invention;

3A illustrates an example of data stored in an image database according to the present invention.

3B illustrates an example of an emergency action database in accordance with the present invention.

3C illustrates an example of a user database in accordance with the present invention.

4 is a block diagram showing an example of an internal configuration of a network camera according to the present invention;

5 illustrates an embodiment of an image file including image data and image management information according to the present invention.

6 is a flowchart showing a procedure of a digital image management method according to the present invention;

7 is a flowchart illustrating a procedure of processing an emergency action in a digital video management system according to the present invention.

8A-8D illustrate various embodiments of a digital video management system in accordance with the present invention.

<Explanation of symbols for the main parts of the drawings>

210: video receiver

220: user interface unit

230: video providing unit

240: video monitoring unit

250: image search unit

260: first aid search unit

270: first aid processor

280: image database

290: First Aid Database

295: user database

Claims (24)

delete delete In the system for receiving digital image data from a camera through a network to manage digital images, An image receiving unit receiving image data captured by a network camera and image management information corresponding to the image data as a single file through a network; An image database configured to store a file including the received image data in association with a user associated with the image data; A user database for storing the type of service provided by the user; An image monitoring unit for selecting a predetermined number of image data according to a predetermined priority among a plurality of image data received from a plurality of network cameras and outputting the selected number of image data to a monitoring screen in real time; A user interface unit receiving an inquiry about image data associated with the user; An image retrieval unit for retrieving image data corresponding to the user who requested the inquiry by using the image management information of the file stored in the image database; And Image providing unit for transmitting the retrieved image data to the terminal of the user through a network Including, The priority is determined according to the type of service being provided by the user associated with the received image data, and the service is (1) a service for monitoring when motion is detected in the received video, and (2) a service for monitoring at all times. Or (3) a service for monitoring during a specific time period, or (4) a service for monitoring when a specific event occurs. The method of claim 3, An emergency action database that stores emergency action information corresponding to user information and event information; Receive image data or situation information data from the network camera through the image receiver, interpret the received image data or situation information data, and refer to the emergency information by referring to user information and event information of the emergency action database. Emergency action search unit for searching; And Emergency response processing unit for processing a predetermined control command according to the retrieved emergency response information Digital video management system using a network camera, characterized in that it further comprises. The method of claim 4, wherein The emergency response information includes a control command for the network camera, The emergency action processing unit transmits the control command for the network camera to the network camera to perform an action for an emergency situation. delete delete delete delete The method of claim 3, The user interface unit receives a storage condition for image data associated with the user from the user, and among the image data received through the image receiving unit, the image data associated with the user is stored in the image database according to the storage condition. Digital video management system using a network camera. The method of claim 10, The storage condition is a digital video management system using a network camera, characterized in that the information including the storage period information. In the camera for transmitting the captured image data to the digital image management system via a network, Lens means; Imaging means for converting light input through said lens means into electric charges and outputting it as an electric image signal; An image manager to adjust the resolution of the electrical image signal according to a resolution control command; An image transmitter for providing an internet access capability and transmitting the adjusted resolution image data to the digital image management system together with image management information corresponding to the image data. Command receiving unit for receiving a predetermined control command from the digital image management system via the Internet-The control command includes a resolution control command corresponding to the image data, the content of the resolution control command is used by (1) the camera Determined by the bandwidth of the network or (2) the type of service subscribed to by the user associated with the camera; And An operation unit for performing an operation including turning on the camera or turning on a lighting device connected to the connected control device according to the received control command Including, And the image data and the image management information are generated as one file and transmitted to the digital image management system. delete delete The method of claim 12, The image transmission unit is a network camera, characterized in that for transmitting the image data with the adjusted resolution to the terminal of the user over a network in real time. The method of claim 12, The image storage unit stores the image data of the adjusted resolution for a predetermined period of time, and re-save the newly processed image data in the same storage device after the predetermined period. Network camera, characterized in that it further comprises. The method of claim 12, The network camera is connected to a channel expansion CCD camera, the image storage unit network camera, characterized in that for storing a second image data received from the channel expansion CCD camera for a predetermined second time period. The method of claim 12, The video management information corresponding to the video data includes information regarding a location where the network camera is installed. delete In the method of managing the digital image in the center by transmitting the image data taken by the camera over a network, Receiving image data whose resolution is adjusted from a network camera through a network; Storing the received image data in an image database in association with a user associated with the image data; Storing a type of service provided by the user in a user database; Selecting a predetermined number of image data according to a predetermined priority among a plurality of image data received from a plurality of network cameras and outputting the predetermined number of image data to a monitoring screen in real time; Receiving an inquiry about image data associated with the user through a user interface unit; Searching for image data corresponding to the user who requested the inquiry by referring to the image database; And Transmitting the retrieved image data to a terminal of the user through a network. Including, The priority may be determined according to (1) whether there is image data in which motion is detected among the received image data, or (2) a type of service provided by a user associated with the received image data. Digital video management using network camera. The method of claim 20, Maintaining first aid information corresponding to the user information and the event information in the first aid database; Receiving image data or situation information data from the network camera, interpreting the received image data or situation information data, and retrieving corresponding emergency action information by referring to user information and event information of the emergency action database; And Processing a predetermined control command according to the retrieved emergency action information Digital video management method using a network camera, characterized in that it further comprises. The method of claim 20, Selecting a predetermined number of image data according to a predetermined priority among a plurality of image data received from a plurality of network cameras and outputting the image data to a monitoring screen in real time; Digital video management system using a network camera, characterized in that it further comprises. The method of claim 20, Receiving the image data and the image management information corresponding to the image data from the network camera as a file, the file is stored in the image database, Searching for image data corresponding to the user who requested the inquiry by referring to the image database, And retrieving image data requested by the user using the image management information of the file stored in the image database. A computer-readable recording medium for recording a program for executing the method of any one of claims 20 to 23 on a computer.