JP2006086940A - Image distribution system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide techniques for browsing an image taken by a network camera from a terminal connected to the Internet only by connecting the network camera to the Internet without making setting relating to an IP address or the like. <P>SOLUTION: A network camera 1 notifies a server 7 of its own allocated IP address and identification information to communicate with the server 7 and uploads taken image data onto the server 7, so that a user browses the image data picked up by the network camera 1 by connection to the server 7. Furthermore, the server 7 changes a destination of connection from a terminal 2 of the user into the IP address of the network camera 1, thereby also connecting to the network camera 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for distributing an image captured by a network camera via a server.

  In recent years, the Internet using broadband has become popular, and Internet usage methods have been actively used to view images captured by a network camera installed at home or the like from a remote location.

  The network camera has a function of browsing the image being captured via the Internet by designating its IP address on a Web browser such as another computer device. There are various uses such as a monitoring camera-like usage method for confirming whether an abnormal situation has occurred at home by viewing a home image captured by a camera at a travel destination.

  In addition to the method of browsing the video captured by connecting directly to the network camera, the method of storing the image captured by the network camera on the server and the user connecting to the server to browse the image is also used. Yes. There exists patent document 1 as such a technique.

JP 2002-10241 A

  However, in Patent Document 1, it is necessary to provide a computer device separately from the camera in order to process video data captured by the camera and to upload to the server.

  In addition, in order to upload an image from a computer device to a server, it is necessary to understand functions such as FTP and make settings related to the server to be used. However, there is a problem that it is difficult for a user who is not familiar with a technology such as a computer device or the Internet to understand and set such a technology.

  In addition, in order to perform transmission / reception between the network camera and the server, it is necessary to recognize each other's IP address.

  When a network camera is connected to the Internet and used by an individual, the global IP address of the network camera is generally not fixed and is dynamically allocated from an ISP (Internet Service Provider) server each time it connects to the Internet. An IP address will be used.

  At this time, if a domain name with a fixed IP address is acquired, it is possible to always connect to the network camera from the server with the same domain name, but this requires costs for registration, maintenance, etc. Therefore, it is rarely used personally.

  Therefore, in order to connect to the network camera from the server, it is necessary to recognize a global IP address that is frequently changed and make a connection request.

  In order to solve such problems, recently, there is a method of using a DDNS (Dynamic Domain Name System) service provided by a company server connected on a network as a name resolution service. DDNS solves the problem by associating dynamically changed global IP addresses with subdomain names on the Internet. If this service is used, the server can connect to the network camera using the subdomain name instead of the dynamically changed IP address.

  In order to use the DDNS server, it is necessary to notify the DDNS server of the global IP address assigned to itself and make a subdomain name assignment request to the DDNS server. Some have a function of automatically performing the operation. When the network camera is re-registered with the DDNS server dynamically every time the global IP address assigned to the network camera is changed, the network camera is connected to the network camera by the global IP address. Instead, domain names can be used.

  In order to use such network camera functions, it is necessary for the user to understand the IP address, subdomain name, DDNS server, etc., and to set the network camera and the like. However, there is a problem that it is difficult for a user who does not have knowledge about an IP address or the like to understand and set such a function.

  Therefore, an object of the present invention is to allow an image captured by the network camera to be browsed from a terminal connected to the Internet by simply connecting the network camera to the Internet without performing settings relating to an IP address or the like. To provide technology.

  In order to solve the above problems, the invention of claim 1 is an image distribution system for distributing image data to a terminal via a network, and a network camera that transmits its own identification information when connected to the network. And a server that manages the identification information transmitted from the network camera and the global IP address of the network camera extracted from the transmission data including the identification information in association with each other, The connection destination of the terminal that is connected and inputs the identification information is changed to the global IP address corresponding to the identification information.

  According to a second aspect of the present invention, there is provided an image distribution system for distributing image data to a terminal via a network, wherein the network camera transmits its own identification information and a global IP address when connected to the network; A server that associates and manages the identification information transmitted from the network camera and the global IP address, and the server connects to the server and inputs the identification information Is changed to the global IP address corresponding to the identification information.

  The invention of claim 3 is the image distribution system according to claim 1 or claim 2, wherein the server issues authentication information in response to the input of the identification information from the terminal, The identification information, the global IP address, and the authentication information are associated and managed, and the connection destination of the terminal that inputs the authentication information instead of the identification information is the global IP address corresponding to the identification information. It is characterized by changing to.

  The invention of claim 4 is the image delivery system according to any one of claims 1 to 3, wherein the server stores image data to be delivered to the terminal that has inputted the authentication information. An area is provided for each authentication information, and information for connecting to the storage area is transmitted to the network camera having the identification information corresponding to the authentication information, and the network camera is transmitted from the server. Image data captured using the information for connecting to the storage area is uploaded to the storage area.

  The invention according to claim 5 is the image distribution system according to any one of claims 1 to 4, wherein the server manages operation settings of the network camera in association with the authentication information. The operation setting is changed in response to a change request for the operation setting from the terminal connected using the authentication information, and the change content of the operation setting is notified to the network camera. The operation is changed according to the change content notified from the server.

  The invention according to claim 6 is the image distribution system according to any one of claims 1 to 5, wherein the server responds to a request from the terminal to connect using the authentication information. An e-mail attached with the image data captured by the network camera having the identification information corresponding to the authentication information is transmitted to a predetermined e-mail address.

  The invention of claim 7 is the image distribution system according to any one of claims 1 to 6, wherein the server sends a request from the terminal to be connected using the authentication information, The network camera having identification information corresponding to the authentication information is notified, and the network camera attaches the captured image data to a predetermined e-mail address in response to the request notified from the server. The electronic mail is transmitted.

  The invention according to claim 8 is the image distribution system according to any one of claims 1 to 7, wherein the server recognizes the type of the terminal connected to the server, and The image data converted according to the type is distributed to the terminal.

  The invention of claim 9 is the image distribution system according to any one of claims 1 to 7, wherein the server recognizes the type of the terminal connected to the server, and The type is notified to the network camera, and the network camera converts captured image data according to the type of the terminal notified from the server.

  According to the first or second aspect of the invention, the user can connect to the network camera simply by connecting the network camera to the network, connecting to the server from the terminal, and inputting identification information. .

  According to the invention described in claim 3, the user can connect to the network camera using authentication information issued for each piece of identification information instead of the identification information.

  According to the invention described in claim 4, the user can upload the image data from the network camera to the server only by connecting the network camera to the network, and the user can connect to the server using the terminal. By inputting the authentication information, the image data uploaded from the corresponding network camera can be browsed.

  According to the fifth aspect of the present invention, the user can change the operation of the corresponding network camera only by requesting the server to change the operation setting of the network camera.

  According to the invention described in claim 6 or claim 7, the user can transmit and receive image data captured by the corresponding network camera as attachment data of an e-mail only with a request to the server.

  According to the invention described in claim 8 or claim 9, since the user can receive image data corresponding to the type of terminal used to view the image, it is difficult or impossible to use the terminal. It is possible to view image data comfortably without receiving possible image data.

  FIG. 1 is a diagram showing the configuration of an image distribution system showing an embodiment according to the present invention. As a basic configuration of the image distribution system, a network connected to a network such as the Internet 6 via a modem 4 for performing communication using ADSL (Asymmetric Digital Subscriber Line), FTTH (Fiber To The Home), or the like. It has the camera 1 and the server 7 similarly connected via a modem (not shown). A cellular phone 2 in the figure is shown as an example of a terminal for browsing an image captured by the network camera 1 using the present image distribution system.

  In the home 5, in addition to the network camera 1, other network devices that perform communication using a network such as a computer device are often used. In this case, the router 3 is connected to the modem 4, and all network devices communicate via the Internet 6 via the router 3. The router 3 is not indispensable for the image distribution system. However, in consideration of an increase in usage examples in recent years, a description including the operation of the router 3 will be given below.

  The network camera 1 has a function of distributing captured video and audio data as a Web server. Thereby, a terminal such as the mobile phone 2 can connect to the network camera 1 and view data such as video and audio captured and distributed by the network camera 1 using a Web browser or the like. . In addition to this, the network camera 1 also has a function of uploading captured image data to the server 7. Furthermore, the network camera 1 has a UPnP (Universal Plug & Play) function and can automatically execute various functions simply by connecting to the network. Details of these functions and operations will be described later.

  The router 3 is a device necessary for performing routing for using one global IP address assigned on the Internet 6 by a plurality of network devices in the home 5. The DHCP function for assigning private IP addresses to a plurality of network devices in the home 5 and the IP addresses related to data to be transmitted and received when these network devices communicate using the Internet 6 are private in the home 5. It has a function of mutual conversion into an IP address and a global IP address on the Internet 6.

  The router 3 is a network device on the Internet 6 including the network camera 1 and the server 7 when distributing data such as video and audio from the network camera 1 and uploading data to the server 7. Port forwarding function for realizing data transmission / reception. Specifically, a specific port is released from the router 3 to the Internet 6 side, and data can be transmitted and received through the port. For example, the port number 80 is assigned to the private IP address of the network camera 1. Thus, in response to a connection request from the Internet 6 side specifying a global IP address, the network camera 1 assigned a private IP address in the home 5 can operate as a Web server. Similarly, if port numbers 20 and 21 are used, an FTP operation such as data upload from the network camera 1 to the server 7 becomes possible.

  The modem 4 is a device necessary for a network device such as the network camera 1 to perform data communication via the Internet 6 using an assigned global IP address. Data communication is performed by various methods such as ADSL and FTTH. It has a function to perform.

  The server 7 is a computer device having a fixed domain name connected to the Internet 6 and stores data such as image data uploaded from the network camera 1 on an internal storage device (not shown). It has a function as an FTP server. The server 7 has an authentication function for storing and managing authentication information such as an IP address, a user ID of a user, and a password for each network camera 1 and controlling a connection from the user to the network camera 1 and the server 7. . Further, the server 7 has a function of managing setting contents related to the imaging function and the like of the network camera 1. Specifically, when the user changes these setting contents managed by the server 7 by an operation from the mobile phone 2, the setting changed by the operation from the server 7 is reflected in the network camera 1. It has become. The server 7 also has a function as a Web server that provides a Web page for a user to browse image data and the like captured by the network camera 1 and uploaded to the server 7 on a terminal such as the mobile phone 2. Further, the server 7 has a function of transmitting an e-mail attached with image data captured by the network camera 1 as attached data. Details of these functions and operations will be described later.

  The cellular phone 2 operates a Web browser or a dedicated software program, connects to the server 7 or the network camera 1 via the Internet 6, and is used for browsing captured image data and the like. However, the mobile phone is an example, and the terminal to be used may be a computer device, a PDA (Personal Digital Assistant), or the like.

  Next, the operation of the image distribution system shown in FIG. 1 will be described.

  The router 3 and the modem 4 are connected to the Internet 6 and the router 3 is assigned a global IP address.

  First, when the network camera 1 is connected to the router 3, a private IP address is assigned to the network camera 1 by the DHCP function of the router 3.

  Next, the network camera 1 automatically starts setting the port forward function of the router 3 using the UPnP function. Specifically, the router 3 using the global IP address is set to be transferred to the private IP address assigned to the network camera 1, for example, the connection to the port numbers 20, 21 and 80 of the router 3. Thereby, the network camera 1 can operate as a Web server or an FTP server using the global IP address assigned to the router 3, and can upload data to the server 7 operating as the FTP server. Become.

  When the network camera 1 completes the setting of the port forward function of the router 3 and recognizes that the global IP address can be used, the network camera then uses this global IP address and its own identification information as a network camera. The server 7 is notified of the serial number assigned to each one via the Internet 6.

  Note that the method for the server 7 to acquire information related to the global IP address of the network camera 1 is not limited to a mode in which the global IP address is directly transmitted from the network camera 1, but only a serial number is transmitted from the network camera 1, The server 7 that receives the data including the serial number may analyze the received data and extract the global IP address of the network camera 1 included therein. Further, the identification information used here may be information other than the serial number, such as a MAC address, as long as it is unique information possessed by each network camera 1. Furthermore, the timing for transmitting information such as a serial number from the network camera 1 to the server 7 is not limited to immediately after the network camera 1 is connected to the router 3 or the Internet 6, and is set in advance, for example, after a predetermined time. Alternatively, the mode may be performed at an arbitrary timing.

  Here, the global IP address used by the network camera 1 is assigned when the modem 4 connects to the Internet 6, but a new global IP address is assigned when the connection is once terminated and reconnected. Alternatively, the global IP address assigned every predetermined time may change. That is, the assigned global IP address is not fixed but dynamically changes.

  However, when the network camera 1 recognizes that the global IP address assigned to itself has been changed, the network camera 1 retransmits the serial number and the global IP address to the server 7, and sends the changed global IP address to the server 7. Notice. Thereby, even when the network camera 1 is in an environment using a dynamically changing global IP address, it is possible to always maintain a state in which data communication between the network camera 1 and the server 7 is possible.

  The setting related to port forwarding of the router 3 described above is executed only when it is recognized that the network camera 1 is connected to the router 3. Therefore, in a state where the router 3 is not used, the network camera 1 only notifies the server 7 of the global IP address and serial number assigned to itself.

  As described above, when the network camera 1 is turned on and connected to the Internet 6 via the router 3, the modem 4 or the like, the above setting operation is automatically performed. Therefore, the user does not need to understand the IP address, the port forward of the router 3 or the like or perform a setting operation.

  When the server 7 receives the serial number and the global IP address of the network camera 1, the server 7 manages the serial number and the global IP address in association with each other.

  Then, the user inputs a predetermined URL including the domain name of the server 7 to the Web browser of the mobile phone 2 and connects to the server 7.

  After the notification of the global IP address from the network camera 1, the user who has connected to the server 7 for the first time inputs the serial number assigned to his / her network camera 1 on the login screen displayed here. When the server 7 recognizes that the user has connected for the first time based on the input serial number, the server 7 issues a user ID and password as authentication information to the user, and notifies the user. The user is prompted to set the network camera 1.

  The user performs various settings according to the contents displayed on the mobile phone 2 by the server 7. For example, an electronic setting used for performing an operation setting such as an imaging time and time such as how many hours or what time the imaging operation of the network camera 1 is performed, information notification or data transmission from the server 7 to the user, and the like. Enter your e-mail address. Of the settings made here, those related to the operation of the network camera 1 are automatically reflected in the settings of the network camera 1.

  Specifically, if the user sets the network camera 1 to capture an image every hour, the server 7 uses the serial number of the network camera 1, the global It is stored and managed together with information such as the IP address, user ID and password, and is notified to the network camera 1. Then, the network camera 1 changes the content of the operation setting related to its imaging function that is stored and managed internally to the content notified from the server 7.

  The server 7 also notifies the network camera 1 of the setting contents related to uploading the captured image data. In the server 7, an area for uploading image data captured by the network camera 1 is created on the storage device in association with the authentication information and the serial number. Specifically, for example, an area on the storage device may be managed by a path name assigned for each authentication information (that is, for each network camera 1). Then, the network camera 1 is notified of information for using the FTP function of the server 7 such as a server name, a path name, an account name, and a password.

  The network camera 1 changes the content of the operation setting related to the data upload function stored and managed in accordance with the information notified from the server 7. Accordingly, it is possible to connect to the server 7 functioning as an FTP server and upload the captured image data to an area assigned to each network camera 1.

  Thereafter, the network camera 1 captures image data, for example, every hour in accordance with the notification content from the server 7 and uploads it on a predetermined area provided on a storage device inside the server 7.

  Here, the server 7 can change the connection destination of the mobile phone 2 that is connected to the server 7 by inputting the serial number to the network camera 1 in response to a request from the user. Specifically, a menu indicating a connection request to the network camera 1 is displayed on the display device of the mobile phone 2, and when this menu is executed by the user's operation of the mobile phone 2, The connection destination is changed to a global IP address managed in correspondence with the serial number previously input by the user. Then, the user can confirm that the network camera 1 is normally recognized by the server 7 by confirming the image being captured by the Web server function of the network camera 1.

  Thus, the user only has to connect to a predetermined URL given in advance and input the serial number of the network camera 1 used by the user. After that, according to an instruction displayed on the display device of the mobile phone 2 by the server 7, simply specifying the time or time interval to be imaged by the network camera 1, periodic imaging with the network camera 1, Data can be uploaded to the server 7. Further, it is possible to connect to the network camera 1 simply by connecting to the server 7 without being aware of the global IP address of the network camera 1. Therefore, the user does not need to understand the IP address, FTP, or the like or perform a setting operation.

  As described above, when the user ID and password are issued as authentication information in the first connection to the server 7, the user can log in to the server 7 using the issued user ID and password thereafter. it can.

  When the server 7 authenticates the input user ID and password and recognizes that the user is the user of the network camera 1 managed by the server 7, the server 7 functions as a Web server so that the menu is displayed on the display device of the mobile phone 2. Is displayed to prompt the user to select a method for browsing the image data.

  As the menu, for example, “accumulated image”, “live camera”, “e-mail”, and the like are displayed, and any one can be selected.

  When “accumulated image” is selected, the date and time of image data captured by the network camera 1 and uploaded to a predetermined area in the server 7 is displayed on the display device of the mobile phone 2 as a list. Then, the user can browse images captured on the date and time by selecting the date and time on which the user wishes to browse.

  When “live camera” is selected, the server 7 changes the connection destination of the user's mobile phone 2 from the server 7 to the global IP address of the network camera 1. The web server function of the network camera 1 enables the user to view the video captured by the network camera 1 in real time.

  When “e-mail” is selected, an e-mail address and a send button preset by the user are displayed. When the send button is pressed, an e-mail attached with image data captured by the network camera 1 as attached data is transmitted to the displayed e-mail address. The user can browse the image data captured by the network camera 1 by opening the data attached to the e-mail. At this time, it is possible to change the displayed e-mail address. Therefore, the user can receive an e-mail attached with image data at a terminal different from the mobile phone 2 being operated, for example. The image data to be transmitted at this time can be arbitrarily specified. In addition to the latest image data stored in the server 7, image data of the date and time specified by the user can also be transmitted.

  In this way, the user can browse the video and image data captured by the network camera 1 used by the user by connecting to the server 7 from the mobile phone 2 and logging in. At this time, since the global IP address of the network camera 1 is managed by the server 7 and it is possible to connect to the network camera 1 only by connection and operation to the server 7, the user can use the global IP address as before. There is no need to be aware or input addresses, subdomains, etc. Therefore, the user does not need to understand the DDNS service or the like or perform a setting operation.

  Further, since a global IP address is used instead of a subdomain name for connection to the network camera 1, an appropriate subdomain name is input and the URL of the network camera 1 is accidentally entered as in the case of using a subdomain name. It is also possible to avoid a security problem such that the designated third party browses the video captured by the network camera 1.

  The server 7 stores and saves the image data captured and uploaded by the network camera 1 in a predetermined area on a storage device provided therein, and stores and saves the image data as described above according to the connection from the user. The image data is read out and displayed on the display device of the mobile phone 2 used by the user. At this time, the server 7 has a function of converting the image data into an appropriate size and format according to the type of terminal used by the user.

  Specifically, the terminal used by the user is recognized from the user agent information obtained from the Web browser, the stored image data is converted, and image data corresponding to each terminal is generated. For example, for a terminal that uses a display device having a different resolution, such as a computer device or a mobile phone 2, the image data is converted into image data having a size corresponding to the resolution. Even in the case of the mobile phone 2, the format of image data that is normally used differs depending on the carrier. For example, gif (Graphics Interchange Format), png (Portable Network Graphics), etc. Convert to the image format. Then, the image data after being converted into an appropriate resolution or image format is distributed to a terminal such as the mobile phone 2.

  Such conversion of the resolution and image data format can be applied not only to display by a Web browser on the user's terminal but also to transmission by e-mail as attached data.

  As described above, the server 7 automatically recognizes the terminal used by the user without performing settings or operations by the user, and converts the image into appropriate image data. Thus, browsing of image data with a high resolution is eliminated, and the load on the processing of the image data is reduced. Therefore, although it is instructed to browse the image data, it can be avoided that the image data takes a long time to be displayed on the mobile phone 2 or a part of the image data protrudes from the screen.

  As described above, in the present image distribution system, the network camera 1 and the server 7 perform the above-described operation, so that the user can connect the network camera 1 and the server only by connecting the network camera 1 to the router 3 or the modem 4. Communication between 7 becomes possible. At this time, since the network camera 1 recognizes the change of the global IP address and notifies the server 7 of the change, the user can perform a special operation or setting even in an environment where the global IP address is not fixed. There is no need to do it.

  In addition, the user simply specifies a predetermined URL on the Web browser, connects to the server 7, and simply performs a simple operation in accordance with the instruction, so that settings relating to the imaging function of the network camera 1 and the image data upload function can be made. It can be carried out.

  In addition, even when the global IP address assigned to the network camera 1 is changed, the user simply specifies the same URL as the setting and connects to the server 7 to capture the image with his / her network camera 1. It is possible to browse the past image data that has been taken, browse the video captured in real time by connecting to the network camera 1, and receive the captured image data using e-mail.

  At this time, the image data converted into the resolution or image format corresponding to the terminal to be used is distributed, so that the user can view the image data comfortably.

(Modification)
In the above embodiment, the network camera 1 notifies the server 7 of the serial number as the identification information, the user inputs the identification information at the first login, and the user ID and password as the corresponding authentication information. The issue mode was shown. However, the present invention is not limited to this. For example, a user ID and a password are specified from the beginning for each network camera 1 as long as the network camera 1 can be used as identification information that can be identified. 1 notifies the server 7 together with the global IP address, the user ID and password as identification information, and the user uses the user ID and password as identification information and authentication information from the first login. It does not matter.

  The image data is stored and saved on the storage device included in the server 7. However, the present invention is not limited to this, and the network camera 1 includes storage means inside and stores the image data therein. It does not matter. Even in this case, since the server 7 recognizes the global IP address of the network camera 1 and is always in a state where data can be transmitted and received, the reference destination of the image data to be displayed by the method selected by the user is stored in the server 7. By using a URL indicating a predetermined area provided on the storage device inside the network camera 1 instead of the storage device provided, the same operation as described above can be realized.

  Similarly, the operation related to transmission of image data using e-mail is not limited to the mode performed by the server 1, and the network camera 1 has an equivalent function, and the mode performed by the network camera 1. I do not care. In this case, upon receiving an instruction to send image data by e-mail from a terminal connected to the server 7, the server 7 notifies this to the network camera 1, and the network camera 1 sends an e-mail attached with the image data to the server. 7 or a predetermined e-mail address stored and managed in the network camera 1 may be notified.

  Similarly, the operation related to the conversion of the image data is not limited to the mode performed by the server 1, and the network camera 1 may have an equivalent function and may be performed by the network camera 1. In this case, the server 7 that recognizes the type of the terminal used by the user notifies the network camera 1 of the type, and converts the image data captured by the network camera 1 into image data corresponding to the type. It is sufficient to perform an upload operation to the server 7 or a transmission operation as attached data of an e-mail.

It is a figure which shows the structure of the image delivery system which concerns on one Embodiment of this invention.

Explanation of symbols

1 Network camera 1
2 Mobile phone 3 Router 4 Modem 6 Internet

Claims (9)

An image distribution system that distributes image data to a terminal via a network,
A network camera that transmits its identification information when connected to the network;
A server that manages the identification information transmitted from the network camera in association with the global IP address of the network camera extracted from the transmission data including the identification information;
With
The image distribution system, wherein the server changes a connection destination of the terminal connected to the server and having input the identification information to the global IP address corresponding to the identification information. An image distribution system that distributes image data to a terminal via a network,
A network camera that transmits its own identification information and global IP address when connected to the network;
A server that manages the identification information transmitted from the network camera in association with the global IP address;
With
The image distribution system, wherein the server changes a connection destination of the terminal connected to the server and having input the identification information to the global IP address corresponding to the identification information. The image delivery system according to claim 1 or 2,
The server issues authentication information in response to an input of the identification information from the terminal, and manages the identification information, the global IP address, and the authentication information in association with each other, instead of the identification information. An image distribution system, wherein a connection destination of the terminal that inputs the authentication information is changed to the global IP address corresponding to the identification information. The image delivery system according to any one of claims 1 to 3,
The server provides a storage area for storing image data to be distributed to the terminal that has input the authentication information for each authentication information, and the information for connecting to the storage area is the identification information corresponding to the authentication information. To the network camera having
The network camera uploads image data captured using the information for connecting to the storage area transmitted from the server to the storage area. The image delivery system according to any one of claims 1 to 4,
The server manages the operation settings of the network camera in association with the authentication information, and changes the operation settings in response to a change request for the operation settings from the terminal connected using the authentication information. In addition, the network camera is notified of the change in the operation setting,
The network camera changes an operation according to the change content notified from the server. The image delivery system according to any one of claims 1 to 5,
The server captures the image captured by the network camera having the identification information corresponding to the authentication information for a predetermined e-mail address in response to a request from the terminal connected using the authentication information. An image distribution system for transmitting an e-mail attached with data. The image distribution system according to any one of claims 1 to 6,
The server notifies a request from the terminal to connect using the authentication information to the network camera having identification information corresponding to the authentication information,
The network camera transmits an e-mail attached with the captured image data to a predetermined e-mail address in response to the request notified from the server. The image delivery system according to any one of claims 1 to 7,
The server recognizes the type of the terminal connected to the server, and distributes the image data converted according to the type of the terminal to the terminal. The image delivery system according to any one of claims 1 to 7,
The server recognizes the type of the terminal connected to the server, notifies the network camera of the type of the terminal,
The network camera converts the captured image data according to the type of the terminal notified from the server.

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