Abstract:
A camera for connection to an authorised user via a network. The camera has a processor arranged to execute a communications client program and an image data decoding program. The camera further has means for capturing image data including encoded login data, the image data being supplied to the image data decoding program, the image data decoding program being arranged to decode the image data and to supply the login data decoded from the image data to the communication client program to set up the camera as an authorised device accessible by the user via the network.

Description:
RELATED APPLICATION 
       [0001]    This application claims priority under 35 U.S.C. §119 or 365 to Great Britain, Application No. 0705431.5, filed Mar. 21, 2007. The entire teachings of the above application are incorporated herein by reference. 
       TECHNICAL FIELD 
       [0002]    The present invention relates to connection of a camera to a network for transmitting image data captured by the camera to an authorised user. 
       BACKGROUND 
       [0003]    Cameras which transmit their data using addressed packets via a network are known, and are commonly referred to as web cameras or webcams. 
         [0004]      FIG. 1  is a schematic block diagram of the manner in which a webcam is connected to a network such as the Internet. In this arrangement, a camera  2  incorporates a web server  4  and is connected to the network  6  via a wired connection  8  such as an Ethernet or USB connection and modem  9 . An appropriate Ethernet or USB port  10  is provided on the camera  2 , and the modem  9  is situated at any convenient location on the site where the camera is located. The camera views an image through an image capture device in the form of its lens  12  and supplies that image via the wired connection  8  to an authorised viewer at a user terminal such as a PC  14 . The user terminal  14  has a web browser  16  which is connected to the Internet  6  in any suitable manner. A wired connection  18  is shown in  FIG. 1  but it will readily be appreciated that a wireless connection could be provided. Images transmitted by the camera  2  via the wired connection  8  and the Internet  6  are received via the connection  18  at the user terminal  14  and can be displayed to be viewed by the authorised user. 
         [0005]    However, before this can be done the camera  2  needs to be configured. This can be done using the web browser  16  at the user terminal  14  which identifies the camera  2  and transmits suitable configuration information to the camera to allow it to be set up for access by the user terminal  14 . This configuration is done using the web browser  16  in communication with the web server  4 . 
         [0006]    Increasingly it is desirable to replace the wired connection  8  with a wireless or WIFI connection. Such an arrangement is shown in  FIG. 2 . In  FIG. 2 , like reference numerals denote like parts as in  FIG. 1 . In this arrangement, the wired connection  8  has been replaced by a wireless network (WIFI)  7  between the camera  2  and a wireless access point (WAP)  11 . The wireless access point is connected to the Internet  6  via a cable connection (e.g. from a model in the WAP  11 . The camera  2  has wireless circuitry  20  for implementing the wireless connection and the wireless access point  11  has similar wireless circuitry  22 . The WIFI network  7  is secure and the camera  2  can only access this network after it has been suitably configured and authorised. 
         [0007]    In order to allow the camera  2  to be suitably configured, a separate wired connection  24  is provided from the camera  2  to the PC  14 . That is, there is still a requirement for a port for example an Ethernet or USB port  10  at the camera and it is necessary to use a port at the user terminal for receiving such an Ethernet or USB connection. The need to provide such a port on the camera together with its corresponding circuitry introduces an overhead into the camera. Moreover, this overhead is required only for configuration purposes. Once the camera has legitimately gained access to the WIFI network, the port  10  and its corresponding connection  24  become redundant unless the camera is moved or the WIFI settings are altered. 
       SUMMARY 
       [0008]    Described embodiments of the present invention obviate the need for such a wired connections for configuration purposes. 
         [0009]    According to one aspect of the invention there is provided a camera for connection to a wireless network having: circuitry for establishing a wireless connection with the wireless network in accordance with configuration data; a processor arranged to execute an image data decoding program; and means for capturing image data including encoded configuration data, said image data being supplied to the image data decoding program which is arranged to decode said image data and to supply said configuration data to the circuitry to establish the wire connection. 
         [0010]    Another difficulty which arises when setting up a camera  2  in the arrangements of  FIGS. 1 and 2  is to allow a viewing program running on the user terminal  14  can connect to the device when firewalls are involved. For example a firewall  26  could be located between the WAP  11  and the Internet or between the PC  14  and the public Internet  6 . When configuring the camera  2 , considerable user knowledge of firewalls may be needed to ensure that images transmitted from the camera  12  can successfully traverse these firewalls to be viewed at the user terminal  14 . 
         [0011]    According to another aspect of the invention there is provided a camera for connection to an authorised user via a network having: a processor arranged to execute a communications client program and an image data decoding program; means for capturing image data including encoded login data, said image data being supplied to the image data decoding program, said image data decoding program being arranged to decode said image data and to supply said login data decoded from said image data to the communication client program to set up the camera as an authorised device accessible by the user via the network. 
         [0012]    The communications client program can be arranged to transmit data from the camera to the authorised user in the form of addressed packets for example in accordance with a known IP protocol. The communications client can further be arranged to receive the login data and to transmit the login data to a central server which is arranged to transmit an authentication certificate to the camera. That authentication certificate sets up the camera as an authorised device and ensure that only authorised users can access it. That is, only users in possession of the login data which has been used by the camera can access image data received from the camera. 
         [0013]    Furthermore, the proprietary protocol can be one which has been set up to traverse firewalls and other obstacles in the network for the purposes of other communications between users. 
         [0014]    Another aspect of the invention provides a camera in which the above two useful features are combined. According to this aspect of the invention there is provided a camera for connection to a wireless network having: circuitry for establishing a wireless connection with the wireless network in accordance with configuration data; a processor arranged to execute an image data decoding program and a communication client program; means for capturing image data including encoded login data and configuration data, said image data being supplied to the image data decoding program which is arranged to decode said image data and to supply said login data to the communication client program to set up the camera as an authorised device accessible by a user of the wireless network; and to supply said configuration data to the circuitry to establish the wireless connection. 
         [0015]    A still further aspect of the invention provides a system comprising a camera and means for connecting the camera to an authorised user via a network, said camera comprising: a processor arranged to execute a communications client program and an image data decoding program; means for capturing image data including encoded login data, said image data being supplied to the image data decoding program which is arranged to decode said image data and to supply said login data to the communication client program to set up the camera as an authorised device; and wherein said connecting means comprises a configuration program executable by a user terminal and arranged to receive at the user terminal said login data and to generate said image data by encoding the login data and including said encoded login data in said image data. 
         [0016]    Another aspect of the invention provides a system comprising a camera and connecting means for connecting the camera to an authorised user via a connection path including a wireless network, the camera having: circuitry for establishing a wireless connection with the wireless network in accordance with configuration data; a processor arranged to execute an image data decoding program; means for capturing image data including encoded configuration data, said image data being supplied to the image data decoding program which is arranged to decode said image data and to supply said configuration data to the circuitry to establish the wireless connection in accordance with the configuration data; and wherein said connecting means comprises a configuration program executable at a user terminal and arranged to receive configuration data enterable by a user at the user terminal and to generate said image data including encoding the configuration data and including the encoded configuration data in the image data. 
         [0017]    Another aspect of the invention provides a method of connecting a camera to an authorised user via a network, the method comprising: executing a communications client program and an image data decoding program at the camera; capturing image data including encoded login data, supplying said image data to the image data decoding program which is arranged to decode said image data; and supplying said login data decoded from said image data to the communication client program to set up the camera as an authorised device accessible by the user via the network. 
         [0018]    It is possible for the configuration program to generate image data including both encoded login data and encoded configuration data to combine the advantages of both systems. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0019]    For a better understanding of the present invention and to show how the same may be carried into effect, reference will now be made by way of example to  FIGS. 3 to 5  of the accompanying drawings, in which: 
           [0020]      FIG. 1  is a schematic block diagram of the manner in which an existing web camera is connected to a network; 
           [0021]      FIG. 2  is a schematic diagram of a web camera connected via a WIFI connection; 
           [0022]      FIG. 3  is a schematic diagram illustrating configuration of a web camera in accordance with one embodiment of invention; 
           [0023]      FIG. 4   a  is a schematic diagram of a display generated by a configuration program; 
           [0024]      FIG. 4   b  is a schematic block diagram of image data on a display; and 
           [0025]      FIG. 5  is a schematic diagram of the arrangement of a camera to receive image data from the display. 
       
    
    
     DETAILED DESCRIPTION 
       [0026]      FIG. 3  is a schematic diagram illustrating configuration of a web camera in accordance with one embodiment of the invention. In  FIG. 3 , a camera  102  has a lens  112  for capturing an image and wireless circuitry  120  for implementing a wireless connection (via a WIFI network  7 ) with a wireless access point such as that designated by reference numeral  11  in  FIG. 2 . The camera also includes a processor  113  which is capable of executing an image recognition program  115  and a communications client  117 . The camera  102  is supplied as part of a system which includes a configuration program  119  which is executable by the user terminal  14  which is owned by an authorised user of the camera. 
         [0027]    The configuration program  119  which is delivered with the camera  102  queries a user of the user terminal  14  to enter all the necessary setup information for the network. This is done by displaying on a display  121  of the user terminal  14  fields to a user and allowing a user to enter the necessary information. An example of a display  121  is shown in  FIG. 4   a . Fields F 1 , F 2  and F 3  are shown which will be identified for a user and which will allow a user to enter information defining setup and configuration parameters for the camera  102  using known interface techniques, for example a keyboard or a mouse. The configuration program  119  also prompts a user to enter login data including a user name into field F 4  and a password into field F 5 . The login data relates specifically to the communication client  117 . After this information has been entered by a user, the configuration program  119  encodes it into image data  130  for display purposes and displays it on the display  121  as shown in  FIG. 4   b . The preferred format for the image data is a 2D barcode but any suitable format is possible. 
         [0028]    Then, as illustrated in  FIG. 5 , the camera  102  is oriented to capture the image of the barcode  130  from the display  121  of the user terminal  14 . Suitable instructions can be supplied to a user with the camera to allow them to do this. The camera  102  executes the image recognition software  115  to capture the image data  130  of the barcode and decodes it. The camera  102  is provided with an indicator  128  such as an audio signal or illumination of an LED to provide feedback to the user to indicate that the image data  130  has been successfully acquired. The login and configuration data derived from the barcode image and decoded by the decoding program  115  is used to configure all the settings for the camera  102 . The login name and user password entered for the communications client  117  is used to configure that client so that it can login to a communications server associated with that communications client. The communications server is denoted by reference numeral  132  in  FIG. 3 . The communications server  132  provides an authentication certificate which can be used by the camera  102  to effect communication events with the user terminal  14  which runs a similar communications client  117  to allow the camera to transmit image data (video data or stills data) to the user terminal  14  via the WIFI network  7  and the Internet  6 . 
         [0029]    The configuration data which is decoded from the image data is supplied to the circuitry  120  to set up the WIFI connection with the wireless access point  11 , especially securing settings such as encryption keys. 
         [0030]    Communication of image data from the camera to the authorised user can be implemented in accordance with a communications protocol discussed in WO2005/009019. The user terminal may be, for example, a personal commuter, personal digital assistant, a suitably enabled mobile phone or any other device able to connect to the network. The user terminal executes the communications client  117  which is provided to communicate using a peer-to-peer communications system. The communications client  117  is a software program executable on a local processor in the user terminal  14 . The communications client  117  displays to a user of the user terminal  14  a list of contacts with which the user can communicate using the peer-to-peer protocol. In this case, that list of contacts will include the user name allocated to the camera. In order to contact the camera, the user of the user terminal can click on the contact listed for the camera displayed at his display  121 . Alternatively, he could type in the user name for the camera. The client  117  then sets up a communication event with the camera. Data is transmitted in addressed IP packets in accordance with methods known in the art. It will be clear from the above discussion that the user terminal has already accessed the communications server to receive an authentication certificate to allow it to communicate via the peer-to-peer network with the camera (and indeed with other peer-to-peer users with similar authentication certificates). 
         [0031]    The communications server communicates with the client  117  using a proprietary protocol, and not using hypertext transfer protocol (HTTP) message format. This has the effect that on an authorised side of a firewall, a communication exchange can be initiated and responses will be accepted through a firewall that would otherwise block the responses. Therefore, once the camera has been configured as an authorised user of the peer-to-peer network using the login data, image data transmitted from it can traverse firewalls without any special firewall avoidance steps being needed. 
         [0032]    In the above description, the camera  102  will transmit image data to the user terminal  14  which is associated with an authorised user. It is a simple matter to add additional recipients who are authorised to receive the image data by transmitting appropriate information via the WIFI network  7 . The communications server has the capability to send additional authorization information to the communications client once it has logged in securely. In the case of a peer to peer network, for example, this could be achieved by logging in another device such as a PC, using the same login name and password as the camera, and authorizing additional contacts on that device. The peer to peer network detects the new authorizations, and sends (via a synchronization process) them to other instances of the client logged in with the same username, including the camera. 
         [0033]    As an alternative to displaying the image  130  of the barcode to be captured by the camera  102 , it can be printed onto a printing medium such as paper and the camera can capture the image from the paper. This allows the camera to be configured in cases where the PC which is going to access the image data from the camera is not readily available in the same location as the camera itself. By printing out the image of the barcode, the printing medium can be conveyed to the location of the camera  102 . 
         [0034]    It will readily be appreciated that any image which captures the setup data input by a user in a decodable form can be used. A barcode is simply a convenient example of such an image. One possible alternative would be to transmit the information serially to the camera, for example by successively illuminating the display  121  with bit data. 
         [0035]    An alternative embodiment of the invention is available for cases where the WIFI network is not secure but where it is still necessary to allow only approved users to receive image data from the camera. According to this embodiment, the camera is not supplied with a configuration program to be executed by a PC, but is supplied with a barcode which encodes a user name and password for the camera. When a camera is purchased by a user, the user uses the camera to capture the barcode image and the communications client  115  receives the user information and password to allow the camera to set itself up as an authorised communications device. The user is also supplied with the user name and password in a human readable form to allow him to enter this information at his PC so that his PC recognises the camera as an authorised communications contact. This option is useful in the situation where no network security information needs to be configured in the camera, which is only the case when the network is not secured. It will be appreciated that the embodiments which require a configuration program can also be used in the case of an insecure network, The configuration program would allow the network details to be left blank, or have an option to specify “use unsecured network”. 
         [0036]    This has the advantage that cameras can be manufactured on a production line because they are all identical. The “setting up” of the cameras and authorised user can be done after the camera has been purchased by a user. 
         [0037]    While this invention has been particularly shown and described with reference to preferred embodiments, it will be understood to those skilled in the art that various changes in form and detail may be made without departing from the scope of the invention as defined by the appendant claims.