US20090290031A1 - Adapter device for image capturing device - Google Patents
Adapter device for image capturing device Download PDFInfo
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- US20090290031A1 US20090290031A1 US12/512,560 US51256009A US2009290031A1 US 20090290031 A1 US20090290031 A1 US 20090290031A1 US 51256009 A US51256009 A US 51256009A US 2009290031 A1 US2009290031 A1 US 2009290031A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/21—Server components or server architectures
- H04N21/218—Source of audio or video content, e.g. local disk arrays
- H04N21/2187—Live feed
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/65—Transmission of management data between client and server
- H04N21/658—Transmission by the client directed to the server
- H04N21/6587—Control parameters, e.g. trick play commands, viewpoint selection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/81—Monomedia components thereof
- H04N21/8146—Monomedia components thereof involving graphical data, e.g. 3D object, 2D graphics
- H04N21/8153—Monomedia components thereof involving graphical data, e.g. 3D object, 2D graphics comprising still images, e.g. texture, background image
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Computer Graphics (AREA)
- Human Computer Interaction (AREA)
- Studio Devices (AREA)
Abstract
A network camera system is configured such that an adapter is connected with a digital camera, and the adapter is connected with a network to which a client is also connected. A video signal representing a real-time image and a digital image signal representing a high-resolution still image are transmitted from the camera to the adapter. The adapter has a function of a file server and allows the client to download image data corresponding to the high-resolution still image. The adapter device further has a function of a streaming server and transmits streaming data representing the real-time image. The client can transmit an operation command to the adapter through the network, and the adapter can transfer the command to the camera to perform the operation required by the client.
Description
- The present application is a Divisional of co-pending U.S. patent application Ser. No. 10/385,470, filed Mar. 12, 2003, which claims priority of Japanese Patent Application No. 2002-068434, filed Mar. 13, 2002. The disclosure of each of these documents is expressly incorporated by reference herein in their entireties.
- The present invention relates to an adapter device which is connected to image capturing devices such as video cameras and transmits captured images to image browsing terminals at distant places through a network such as the Internet.
- Recently, the broadband Internet such as ADSL or CATV system has become available at a relatively low cost, and an Internet server such as HTTP server and/or FTP server can be used as a home-use server.
- Besides the HTTP server and/or the FTP server, a streaming server which transmits a real-time video image captured by a video camera or the like is now available. The streaming server is expected to be used for home security systems. Therefore, such a personal streaming server may be widespread as the broadband becomes popular.
- In the meantime, recently, a digital camera provided with a CCD having several millions of image pixels has been developed and used. If such a digital camera and the streaming server are used in combination, an inexpensive network camera system having a high performance may be expected.
- However, the size of the data output by such a digital camera may be approximately 1 Mega bytes even if the data is compressed. In order to transmit such data, even if the broadband transmission line is used, one through several seconds may be required to transmit one image. Depending on a condition of the communication line, more transmission time may be required. Therefore, even if such a digital camera is used to configure the network camera system, it is difficult to use the digital camera to transmit the high-resolution real-time image to a distant place.
- The present invention is advantageous in that an adapter is provided, with which an image captured by an image capturer such as a digital camera can be transmitted through a network to another computer connected to the network.
- According to an aspect of the invention there is provided a network camera system including at least one client, a digital camera and an adapter, the client and the adapter being connected with each other through a network.
- In such a system, the camera is provided with an image capturer, an analog video signal outputter that outputs an analog video signal representing a moving image captured by the image capturer, a digital image signal outputter that outputs a digital image signal representing a still image captured by the image capturer, a control command receiver, and an operation controller that controls an operation of the camera in accordance with the control command received through the control command receiver.
- Further, the adapter is provided with a file server that receives the digital image signal from the camera and stores an image file representing the still image captured by the image capturer, the file server allowing the at least one client to download the image file from the file server through the network, a streaming server that receives the analog video signal from the camera and creates streaming data corresponding to the received video signal, the streaming data being transmitted to the client through the network, an adapter command receiver that receives an operation command from the client through the network, and an adapter command transmitter that transmits a control command corresponding to the operation command to the camera.
- Furthermore, the client is provided with a browser that downloads the image file from the file server and displays an image represented by the image file, the browser being capable of processing the streaming data and displaying the moving image represented by the streaming data, and a client command transmitter that allows an operator to input an operation command indicative of an operation to be executed by the camera and transmits the operation command to the adapter through the network.
- As above, according to one aspect, the network camera system is configured such that an adapter is connected with a digital camera, and the adapter is connected with a network to which a client is also connected. A video signal representing a real-time image and a digital image signal representing a high-resolution still image are transmitted from the camera to the adapter. The adapter has a function of a file server and allows the client to download image data corresponding to the high-resolution still image. The adapter further has a function of a streaming server and transmits streaming data representing the real-time image. The client can transmit an operation command to the adapter through the network, and the adapter transfer the command to the camera to perform the operation required by the client.
- Optionally, the operation to be executed by the camera may include capturing a still image when the operation command is input to the client command transmitter by the operator.
- Further optionally, the digital image signal representing the captured image output by the digital image signal outputter is received by the file server and stored in the adapter.
- In a particular case, the operation to be executed by the camera may include at least one of zooming operation of the camera, capturing a still image and adjustment of brightness of an image captured by the camera.
- Still optionally, a resolution of the still image may be greater than that of the moving image.
- According to another aspect of the invention, there is provided an adapter for a network camera system. The network camera system may include at least one client, a digital camera and the adapter, and the client and the adapter are connected with each other through a network. The camera is capable of outputting an analog video signal representing a moving image and digital image signal representing a still image captured by the camera, an operation of the camera being controllable by inputting a control command to the camera. The client may include a browser that downloads the image file from a file server and displays an image represented by the image file, the browser being capable of processing streaming data and displaying a moving image represented by the streaming data. The client may further include a command transmitter that allows an operator to input an operation command indicative of an operation to be executed by the camera and transmits the operation command to the adapter through the network. In such a network, the adapter is provide with a file server that receives the digital image signal from the camera and stores an image file representing the still image captured by the camera, the file server allowing the at least one client to download the image file through the network, and a streaming server that receives the analog video signal from the camera and creates streaming data corresponding to the received video signal, the streaming data being transmitted to the client through the network. The adapter is further provided with a command receiver that receives an operation command from the client through the network, and a command transmitter that transmits a control command corresponding to the operation command to the camera.
- According to a further aspect of the invention, there is provided an adapter capable of being connected with an image capturer and transmitting a captured image to a terminal connected to a network system as digital image data. The adapter is provided with a first interface receiving an analog signal output by the image capturer, a second interface capable of transmitting/receiving digital data to/from the image capturer, a first image data generator that generates first digital data based on the analog signal received through the first interface, a network interface that exchanges data with the terminal through the network, and a controller that controls the first interface, the second interface, the first image data generator and the network interface.
- Optionally, the analog signal may be an analog video signal.
- Further optionally, the network may include the Internet.
- Still optionally, the adapter may be configured to transmit data to the terminal in accordance with the HTTP.
- Further optionally, the adapter may further include a casing. The first interface and the second interface may be formed on the casing, and the adapter may be configured such that, by securing the casing onto the image capturer, an analog signal output terminal of the image capturer is connected to the first interface and a digital signal output terminal of the image capturer is connected to the second interface.
- With such a configuration, no cables are necessary for connecting the camera and the adapter, and handling thereof can be facilitated.
- In a particular case, the adapter includes a fixation mechanism that securely fixes the adapter to the image capturer.
- Optionally, the fixation mechanism may include a positioning member that is used to adjust a positional relationship of the adapter with respect to the image capturer when the adapter is secured to the image capturer.
- Further optionally, the positioning member may include at least two guide pins which are inserted in corresponding holes formed on the image capturer.
- Optionally, the fixation mechanism may include locking claws which engage with engageable portions formed on the image capturer.
- In this case, the fixation mechanism may further include a release mechanism which is operated to release engagement of the locking claws with the engageable portions.
- According to another aspect of the invention, there is provided an adapter to be connected with an image capturer. The adapter is provided with a first terminal and a second terminal which are connectable with the image capturer, a third terminal connectable to a communication network, a controller capable of controlling the image capturer, an image processer that processes an image signal to generate first digital image data, and a server that manages digital image data including the first digital image data.
- With this structure, the first terminal receives a video signal of a moving image, the image processer generating the first digital image data by processing the video signal. A control signal instructing the image capturer to capture second digital image data representing an image having a higher resolution than an image represented by the first digital image data is transmitted from the controller through the second terminal. The second digital image signal, which is generated in response to the control signal transmitted to the image capturer through the second terminal, is received through the second terminal. Further, another control signal requesting for capturing of the second digital image data by the image capturer is transmitted from a computer connected to the communication network to the controller through the third terminal. The server transmits one of the first digital image data and the second digital image data to the computer through the third terminal.
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FIG. 1 shows an entire configuration of a network camera system according to a first embodiment; -
FIG. 2 is a block diagram of a digital camera of the network camera system; -
FIG. 3 is a block diagram of an adapter device of the network camera system; -
FIG. 4 is a flowchart illustrating an operation of the digital camera shown inFIG. 2 ; -
FIG. 5 is a flowchart illustrating an operation of the adapter device; -
FIG. 6 is an exemplary screen shot when an “Image Browsing/Camera Controlling Program” is executed in a client PC; -
FIG. 7 is an exemplary screen shot when an “Image Browsing/Camera Controlling Program” is executed in a client PC; -
FIG. 8 is a flowchart illustrating an operation of the client PC; and -
FIG. 9 is a perspective view of a digital camera and an adapter device according to a second embodiment. - Hereinafter, an embodiment of the invention will be described with reference to the accompanying drawings.
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FIG. 1 schematically shows an entire configuration of a network camera system according to a first embodiment of the invention. Thenetwork camera system 1 includes adigital camera 110, anadapter device 200, anADSL modem 301 and aclient PC 400. - The
digital camera 110 is capable of capturing a high-resolution digital still image, a maximum size of which is 3200×2400 (pixels). Further, thedigital camera 110 has a video output function, and is capable of outputting a video signal output by the CCD of thedigital camera 110 as an NTSC signal. Thedigital camera 110 also has a USB (Universal Serial Bus) interface as a communication interface to communicate with an external device. - The
digital camera 110 is connected with theadapter device 200 through a USB (Universal Serial Bus)cable 102 and avideo cable 103. Theadapter device 200 receives the NTSC signal representing an moving image through thevideo cable 103, and the high-resolution digital still image through theUSB cable 102, from thedigital camera 110. Further, theadapter device 200 is capable of controlling thedigital camera 110 by sending control commands through theUSB cable 102. - The
adapter device 200 has both the USB interface and the Ethernet (trademark) interface, which will be described later. Theadapter device 200 is connected to the Internet through a routertype ADSL modem 301 and anEthernet cable 302. Theadapter device 200 has a file server function, and capable of storing the high-resolution digital still images received from thedigital camera 110 in a storage unit thereof as high-resolution digital still image files, and allows the thus stored image files to be downloaded by another computer connected to the Internet. - The
adapter device 200 is capable of encoding each frame of the analog moving images into a low-resolution (e.g., VGA size: 640×480) digital image data. Further, theadapter device 200 has a streaming server function, and is capable of transmitting the encoded low-resolution digital image data to another computer connected to the Internet. It should be noted that theadapter device 200 according to the first embodiment is capable of encoding and transmitting the image on a substantially real-time basis. Accordingly, another computer connected to the Internet is capable of communicating at a sufficient communication speed, the low-resolution digital image data captured by thedigital camera 110 and encoded by theadapter device 200 can be browsed as a real-time moving image. - The
client PC 400 has amain body 401, amonitor 402, aninput device 403 including the keyboard, mouse and the like, and theADSL modem 404. - The
client PC 400 can be connected to the Internet through theADSL modem 404, and receive the low-resolution digital image data encoded by theadapter device 200. By subsequently display the images thus received, the images captured by thedigital camera 110 can be displayed on themonitor 402 as a moving image substantially simultaneously with the capturing thereof. Further, theclient PC 400 is capable of downloading the high-resolution digital still image data stored in the storage unit of theadaptor device 200, and displaying the image represented by the downloaded data. -
FIG. 2 shows a block diagram of thedigital camera 110 according to the first embodiment. Thedigital camera 110 includes acontroller 111, avideo interface 112, an image captureoptical system 113, a CCD (Charge Coupled Device)module 114, an imagecapture control unit 115, astorage 116, a communication I/O (input/output module) 117, a USB (Universal Serial Bus)interface 118, avideo output terminal 124 and aUSB socket 122. - The light beam incident on the image capture
optical system 113 is converged on the light receiving surface of theCCD module 114. TheCCD module 114 converts the received optical image into electrical signals at every 1/30 seconds and transmits the thus generated electric signals to thecontroller 111. - The
controller 111 includes aCPU module 111 a, a DSP (Digital Signal Processor)module 111 b, anNTSC encoder 111 c, aflash memory 111 d and an ASIC (Application-Specific Integrated Circuit) including aRAM 111 e. Operation of thedigital camera 110 is controlled as theCPU module 111 a executes a program stored in theflash memory 111 d. - The image signal output by the
CCD module 114 is transmitted to theDSP module 111 b. TheDSP module 111 b applies predetermined signal processing such as digital conversion, gamma compensation and white balance adjustment. When a still image is required, theDSP module 111 b reads out the image data all the pixels in the effective imaging area of the CCD and generates high-resolution digital image data representing an image consisting of 3200×2400 pixels. Otherwise, theDSP module 111 b controls theCCD module 114 to obtain a low-resolution image by thinning the number of pixels or by applying addition to adjoining pixels or the like to reduce the number of pixels of an image to a VGA size (i.e., 640×480 pixels). The size-reduced (i.e., low-resolution) image data is transmitted to theNTSC encoder 111 c. The data is converted into the NTSC video signal and is transmitted to thevideo interface 112. The image conversion procedure by theDSP module 111 b and theNTSC encoder 111 c is executed within less than 1/30 seconds per one image frame. Therefore, the image captured by the image captureoptical system 113 is output through thevideo interface 112 as an analog video signal. - The
USB cable 102 is connected with theUSB interface 118 through aUSB socket 122. TheUSB interface 118 is connected with a communication I/O 117. Further, the communication I/O 117 is connected with theCPU module 111 a, which controls the communication I/O 117 and transmits/receives the digital data to/from theadapter device 200 through theUSB cable 102. Theadapter device 200 transmits a control signal to theCPU module 111 a through theUSB cable 102 to control thatdigital camera 110. For example, when a predetermined control signal is transmitted from theadapter device 200 to thedigital camera 110, theCPU module 111 a of thedigital camera 110 captures a high-resolution still image and transmits the same to theadapter device 200. For another example, when another predetermined signal is transmitted from theadapter device 200 to thedigital camera 110, theCPU module 111 a controls the imagecapture control unit 115 to perform a zooming operation and/or an adjustment of the aperture size. - When the image capture start signal is input to the
digital camera 110 by theadapter device 200, theCPU module 111 a obtains a high-resolution digital image converted by theDSP module 111 b, and encodes the data into a high-resolution image data file in JPEG format, and stores the JEPG file in thestorage 116. Further, theCPU module 111 a transmits the high-resolution image data file to theadapter device 200 through theUSB cable 102. For the above operations, theRAM 111 e is used to provide a work area. -
FIG. 3 is a block diagram of theadapter device 200. Theadapter device 200 includes aCPU 201, aUSB interface 202, an A/D converter 203, avideo capture 204, aRAM 205, astorage 206, aflash memory 207, anEthernet socket 223 to which theEthernet cable 302 is connected, anEthernet interface 208, aUSB socket 222 to which theUSB cable 102 is connected, and avideo input terminal 224 to which thevideo cable 103 is connected. - The
USB interface 202 is connected with theCPU 201, which transmits a control signal to thedigital camera 110 through theUSB cable 102 connected with theUSB socket 222. Further, theCPU 201 obtains the high-resolution image data file from thedigital camera 110 through theUSB cable 102, and stores the received image data file in thestorage 206. - The video signal output by the
video output terminal 124 of thedigital camera 110 is received by the A/D converter 203 of theadapter device 200 through thevideo cable 103. The A/D converter 203 digitizes the video signal and transmits the digitized video signal to thevideo capture 204. Thevideo capture 204 processes the digitized video signal and generates image data representing a low-resolution (i.e., 640×480 pixels) image. The above process is performed within a period of 1/30 seconds. - The
Ethernet interface 208 is connected with theADSL modem 301. TheCPU 201 executes an HTTP server program so that other computers connected to the Internet can download the image data files stored in thestorage 206. - According to the embodiment, only a
predetermined client PC 400 is allowed to access thestorage 206. For example, an operator of theclient PC 400 transmits predetermined ID and password to theadapter device 200 by operating theinput device 403. Then, theadapter device 200 performs authentication with reference to the input ID and password. Only to theclient PC 400 which is authenticated, the image data files stored in thestorage 206 are transmitted. - The above procedure is performed as the
CPU 201 executes corresponding programs stored in theflash memory 207. Therefore, by rewriting the programs stored in theflash memory 207, it becomes possible to use another digital camera, which has the USB interface and the analog video signal output, to function in the similar way. Accordingly, the system configuration can be changed depending on purposes. It should be noted that theRAM 205 is used as a work area when theCPU 201 executes such programs. -
FIG. 4 is a flowchart illustrating an operation of thedigital camera 110 according to the embodiment. - When the program is initiated, in S101, the
CPU module 111 a controls theDSP module 111 b so that the signal corresponding to 1 frame of image output by theCCD module 114 is converted into the NTSC video signal, which is output from thevideo interface 112. Then, control proceeds to S102. - In S102, the
CPU module 111 a checks a status of the communication I/O 117 to examine whether the control command has been received from theadapter device 200. If the control commands has been received from the adapter device 200 (S102: YES), control proceeds to S103. If the control command has not been received (S102: NO), control returns to S101. - From S103 to S105, a procedure to be executed is determined in accordance with an instruction represented by the control command transmitted from the
adapter device 200. - In S103, it is judged whether the control command indicates a zooming of the camera. If the control command indicates the zooming operation (S103: YES), control proceeds to S110. If the control command does not indicate the zooming (S103: NO), control proceeds to S104.
- In S104, it is judged whether the control command indicates a capturing of a still image. If the control command indicates the capturing of a still image (S104: YES), control proceeds to S120. If the control command does not indicates the capturing of the still image (S104: NO), control proceeds to S105.
- In S105, it is judged whether the control command indicates adjustment of an aperture size. If the control command indicates the adjustment of the aperture size (S105: YES), control proceeds to S130. If the control command does not indicates the adjustment of the aperture size (S105: NO), control returns to S101.
- In the flowchart shown in
FIG. 4 , one of the three procedures described above is performed. However, it is an exemplary embodiment, and in an actual configuration, more than three procedures may be included and selection may be made therefrom. - In S110, the
CPU module 111 a transmits a zoom command to the imagecapture control unit 115. The imagecapture control unit 115 controls, upon receipt of the zoom command, the image captureoptical system 113 to execute zooming operation. Then, control proceeds to S111. - The image
capture control unit 115 transmits a predetermined end signal to theCPU module 111 a when the zooming operation is finished. In S111, theCPU module 111 a receives the end signal indicative of the completion of the zooming operation and confirms the completion of the zooming operation. Then, control proceeds to S101. - In S120, the
CPU module 111 a instructs theDSP module 111 b to capture an image. Then, control goes to S121. - In S121, the
DSP module 111 b extracts the output signal of theCCD module 114, converts the same to generate image data, and transmits the image data to theCPU module 111 a. TheCPU module 111 a generates an image data file representative of the high-resolution image compressed in JPEG format using the converted image data, and stores the image data file in thestorage 116. Then, control proceeds to S122. - In S122, the
CPU module 111 a controls the communication I/O 117 to transmit the image data file stored in thestorage 116 to theadapter device 200 through theUSB cable 102. Then, control proceeds to S101. - In S130, the
CPU module 111 a transmits an aperture size adjustment command to the imagecapture control unit 115. The imagecapture control unit 115 controls, upon receipt of the aperture size adjustment command, the image captureoptical system 113 to adjust the aperture size. Then, control proceeds to S131. - The image
capture control unit 115 transmits a predetermined end signal to theCPU module 111 a when the above-described aperture size adjustment operation is terminated. In S131, theCPU module 111 a receives the end signal and recognizes the completion of the aperture size adjustment and confirms the completion of the aperture size adjustment operation. Then, control proceeds to S101. - According to the above-described procedures, the
digital camera 110 performs capturing of a still image, aperture adjustment, zooming operation and the like in accordance with control signal transmitted from theadapter device 200. -
FIG. 5 is a flowchart illustrating an operation of theadapter device 200. - In S201, the
adapter device 200 transmits a predetermined signal to thedigital camera 110 through theUSB cable 102, and checks a response of thedigital camera 110 with respect to the transmitted predetermined signal. That is, theCPU 201 judges whether thedigital camera 110 operates correctly based on the response of thedigital camera 110. - If it is judged that the
digital camera 110 operates correctly (S201: YES), control proceeds to S202. If it is judged that thedigital camera 110 does not operate correctly (e.g., when thedigital camera 110 is not powered ON) (S201: NO), the procedure shown inFIG. 5 is terminated. - In S202, authentication is performed. That is, control pauses until predetermined ID and password are transmitted from the
client PC 400. When the predetermined ID and password are transmitted (S202: YES), control proceeds to S203. Until the predetermined ID and password are transmitted (S202: NO), control repeats S202. - In S203, the
CPU 201 judges whether a command is transmitted from theclient PC 400. If theCPU 201 has not received the command from the client PC 400 (S203: NO), control proceeds to S250. In S250, it is judged whether a predetermined period (e.g., 30 seconds) has elapsed. That is, by repeating S203 and S250, it is judged whether a status in which theCPU 201 does not receive the command from theclient PC 400 is kept for the predetermined period. - According to the present embodiment, when the
client PC 400 is used for browsing the image captured by thedigital camera 110 through theadapter device 200, theclient PC 400 transmits a request for one frame of moving image at every 1/30 seconds. According to the embodiments, theclient PC 400 receives the thus transmitted still images constituting the moving image, which are subsequently reproduced and displayed in theclient PC 400. Therefore, if no signal has been received from theclient PC 400 for the predetermined period, an operator of theclient PC 400 may operate theclient PC 400 so as to stop browsing the images, or the connection between theclient PC 400 and theadapter device 200 may have been lost. Therefore, in such a case, i.e., the command has not been transmitted from theclient PC 400 to theadapter device 200 for the predetermined period (S250: YES), the procedure shown inFIG. 5 is terminated. Otherwise (S250: NO), control returns to S203. - In S204 through S207, a procedure to be executed is determined depending on an instruction represented by the received command.
- In S204, it is judged whether the command indicates “transmission of one frame of moving image”. If it does (S204: YES), control proceeds to S210. Otherwise (S204: NO), control proceeds to S205.
- In S205, it is judged whether the command indicates “capturing of a high-resolution still image”. If it does (S205: YES), control proceeds to S220. Otherwise (S205: NO), control proceeds to S206.
- In S206, it is judged whether the command indicates the “zooming operation”. If it does (S206: YES), control proceeds to S230. Otherwise (S206: NO), control proceeds to S207.
- In S207, it is judged whether the command indicates “adjustment of the aperture size”. If it does (S207: YES), control proceeds to S240. Otherwise (S207: NO), control returns to S203.
- In S210, the
CPU 201 controls thevideo capture 204 to convert the one frame of video signal, which is being transmitted from the digital camera through thevideo cable 103, to digital image data representing a low-resolution image. Then, control proceeds to S211. - In S211, the digital image data generated in S210 is compressed to create an image data file for animation, which is stored in the
storage 206. Then, control proceeds to S212. - In S212, the image data file for animation, which is created in S211, is transmitted to the
client PC 400. Then, control returns to S203. - Specifically, according to the embodiment, the moving image is realized by subsequently displaying the low-resolution images, which are represented by, but not limited to, JPEG (Joint Photographic Experts Group) files. In S210 and S211, the a frame of the video signal is converted to a JPEG file. Through the
video cable 103, frames, each of which as a VGA (Video Graphic Array) size (i.e., 640×480 pixels), are subsequently transmitted at a rate of 30 frames/second. Each frame data is converted/compressed into a JEPG file to generate image data files of animation, which are subsequently stored in thestorage 206. A predetermined number of thus generated JPEG files are stored, and the newest file replaces the oldest file in the storage. - When the
client PC 400 transmits a request for one frame of the moving image, theCPU 201 transmits the latest JPEG file when the request is received to theclient PC 400. As will be described with reference toFIG. 8 , the request of theclient PC 400 and the transmission of the new JPEG file in response to the request are continuously repeated, thereby the user of thePC 400 can view the moving image. - It should be noted that, depending of the traffic, the file transmission rate may be less than 30 fps (files per second). However, since the timing when the
adapter 200 receives the request from theclient PC 400 cannot be scheduled in advance, all the frames (i.e., 30 frames per second) are stored in thestorage 206. - It should be noted that, in the above example, the low-resolution image is represented by JPEG files of VGA images, and the JPEG files are transmitted at a rate of 30 fps. However, this configuration may be modified depending on usage/communication environments. For example, a smaller image (e.g., QVGA: 320×240 pixels) may be used, transmission rate may be reduced (e.g., 15 fps) and/or a compression rate may be increased to reduce the amount of data transmitted to the
client PC 400. - In S220, the
CPU 201 controls theUSB interface 202 to transmit an operation command instructing capturing of a still image to thedigital camera 110. Thedigital camera 110 captures a high-resolution still image (e.g. 3200×2400 pixels) and transmits an image data file containing the high-resolution still image to the adapter device 200 (S122 ofFIG. 4 ) when the command transmitted from theUSB interface 202 is received (S120 ofFIG. 4 ). Thereafter, control proceeds to S221. - In S221, the
CPU 201 stores the image data file transmitted from the digital camera 110 (S122 ofFIG. 4 ) in thestorage 206. Then, control proceeds to S222. - In S222, the image data file stored in the
storage 206 in S221 is transmitted to theclient PC 400. Then, control proceeds to S203. - In S230, the
CPU 201 controls theUSB interface 202 to transmit an operation command instructing the zooming operation to thedigital camera 110. Upon receipt of the command (S103 ofFIG. 4 : YES), thedigital camera 110 controls the imagecapture control unit 115 to perform the zooming operation (S110 ofFIG. 4 ). Then, control returns to S203. - In S240, the
CPU 201 controls theUSB interface 202 to transmit an operation command instructing the adjustment of the aperture to thedigital camera 110. Upon receipt of the command (S105 ofFIG. 4 : YES), thedigital camera 110 controls the imagecapture control unit 115 to adjust the aperture size (S130 ofFIG. 4 ). Then, control returns to S203. - As described above, as the
adapter device 200 operates in accordance with the control signal transmitted from theclient PC 400, various operations including transmission of moving/still images and control of the camera functions. - The above-described and other commands transmitted from the
client PC 400 to theadapter device 200 are issued as an operator of theclient PC 400 operates application programs running on theclient PC 400. -
FIGS. 6 and 7 show examples of screen images on theclient PC 400 when an application program runs. -
FIG. 6 shows a main window of the screen when an “image browsing/camera controlling program” is executed in theclient PC 400. The main window includes a low-resolution moving image display area I1, a still image capture button B1, a zooming slider S1 and an aperture size slider S2 are arranged. - In the moving image display area I1, images transmitted from the adapter device 200 (S212 of
FIG. 5 ) are displayed subsequently. Thus, the low-resolution image is updated at every 1/30 second, thereby a moving image displayed on the moving image display area I1. - If the operator of the
client PC 400 operates theinput device 403 to click the button B1, the command instructing the “capture of the high-resolution still image” is transmitted from theclient PC 400 to theadapter device 200. The zoom slider S1 and the aperture size slider S2 indicate current status of zooming condition and the aperture size, respectively. Further, if the operator of theclient PC 400 operates theinput device 403 to move the zoom slider S1 and the aperture size slider S2, the commands instructing the “zooming operation” and the “adjustment of the aperture size” are transmitted from theclient PC 400 to theadapter device 200, respectively. - Specifically, if the operator clicks the button B1, a still image display window as shown in
FIG. 7 is displayed on themonitor 402. In the still image display window, a still image display area I2 is arranged. The image of the image file transmitted from the adapter device 200 (S222 ofFIG. 5 ) is displayed in the still image display area I2. - Thus, in a typical case, the operator observes the moving image displayed on the moving image display area I1, and adjust the zooming condition and the brightness (i.e., the aperture size). Then, when the operator clicks the button B1, a high-resolution image corresponding to the image displayed in the moving image display area I1 is captured and transmitted from the
digital camera 110 via theadapter device 200. -
FIG. 8 shows a flowchart illustrating the procedure of the image browsing/camera controlling program executed in theclient PC 400. In S301, theclient PC 400 accesses theadapter device 200 through the Internet, and transmits the predetermined ID and password assigned to theclient PC 400 to theadapter device 200. - In S302, it is judged whether the
client PC 400 is connected to theadapter device 200 and is successfully authenticated (cf. S202 ofFIG. 5 : YES). If a code indicating “successfully authenticated” is received from the adapter device 200 (S302: YES), control proceeds to S303. If theadapter device 200 does not respond for a predetermined period (e.g., 30 seconds) as theadapter device 200 has not operated, has failed to authenticate or the like, control proceeds to S340. - In S340, a message indicating the operator that the connection is not established is displayed, and the operator is asked to re-execute the procedure for establishing the connection with the
adapter device 200. Then, the operator operates theinput device 403 to input the instruction indicating to re-execute or terminate the procedure. - If the operator instructs the re-execution (S340: NO), control returns to S301. If the operator instructs to terminate the procedure (S340: YES), the procedure shown in
FIG. 8 is terminated. - In S303, the
client PC 400 transmits a command requesting for transmission of a frame of moving image to theadapter device 200. Then, control proceeds to S304. Upon receipt of this command (S204 ofFIG. 5 : YES), theadapter device 200 transmits the image data representing a frame of moving image to the client PC 400 (S212 ofFIG. 5 ). - In S304, the
client PC 400 displays the image data, which has been transmitted from theadapter device 200 in S212 ofFIG. 5 , in the moving image display area I1 (seeFIG. 6 ). Then, control proceeds to S305. - In S305, it is judged whether a command is input by the operator of the
client PC 400. If the command is input (S305: YES), control proceeds to S306. If the command is not input (S305: NO), control proceeds to S309. - In S306 through S308, a procedure to be performed is determined depending on the command input by the operator.
- In S306, it is judged whether the input command indicates the “zooming”. If the input command indicates the “zooming” operation (S306: YES), control proceeds to S310. If the command is not the “zooming” command (S306: NO), control proceeds to S307.
- In S307, it is judged whether the input command indicates the “capturing of high-resolution still image”. If the input command indicates the capturing of the image (S307: YES), control proceeds to S320. Otherwise (S307: NO), control proceeds to S308.
- In S308, it is judged whether the input command indicates the “adjustment of the aperture size”. If the input command indicates the adjustment of the aperture size (S308: YES), control proceeds to S330. If not (S308: NO), control proceeds to S309.
- In S310, the
client PC 400 transmits a command instructing the zooming operation to theadapter device 200 through the Internet. Upon receipt of the command (S206 ofFIG. 5 : YES), theadapter device 200 transmits a command instructing the zooming operation to the digital camera 110 (S230 ofFIG. 5 ). Then, control proceeds to S309. - In S320, the
client PC 400 transmits a command instructing to capture a still image to theadapter device 200 through the Internet. Then, upon receipt of this command (S205 ofFIG. 5 : YES), theadapter device 200 transmits the high-resolution image data file to the client PC 400 (S222 ofFIG. 5 ). Then, control proceeds to S321. - In S321, the still image display window (
FIG. 7 ) is opened, and the image represented by the image data file transmitted from theadapter device 200 is displayed in the still image display area I2. Thereafter, control proceeds to S309. - In S330, the
client PC 400 transmits a command instructing to adjust the aperture size to theadapter device 200 through the Internet. Then, upon receipt of this command (S207 ofFIG. 5 : YES), theadapter device 200 transmits a command to perform the adjustment of the aperture size to the client PC 400 (S240 ofFIG. 5 ). Then, control proceeds to S309. - With the above configuration, the operator of the
client PC 400 can monitor the moving image simultaneously with the capturing thereof, and obtain the high-resolution still image at a desired timing. - In the above-described embodiment, the
digital camera 110 and theadapter device 200 are connected using thevideo cable 103 and theUSB cable 102 so that thedigital camera 110 and theadapter device 200 can be arranged freely. However, the invention is not limited to this configuration, and the adapter device may be detachably coupled with the digital camera without using the cables. Such a configuration will be described hereinafter as a second embodiment. -
FIG. 9 is a perspective view of adigital camera 1100 and anadapter device 2000 according to a second embodiment. - On a
side wall 1100 a of thedigital camera 1100, avideo output socket 1240, aUSB socket 1220, guideholes 1250 and lockclaw inserting holes 1260 are formed. On aside wall 2000 a of theadapter device 2000, facing theside wall 1100 a of thedigital camera 1100, guide pins 2250, lockingclaws 2260, avideo input plug 2240 and aUSB plug 2220 are provided. The lockingclaws 2260 are L-shaped hooking members, which are formed on a single plate member (not shown) accommodated in a body of theadapter device 2000. The single plate member is slidable in a longitudinal direction of theside wall 2000 a and biased with a spring (not shown) such that, whenadapter device 2000 is coupled to thedigital camera 1100, the locking claws are inserted through the lockingclaw insertion holes 1260 and engaged with theside wall 1100 a. Theadapter device 2000 is further provided with alock release button 2270 on the top surface thereof. - It should be noted that the
USB socket 1220, thevideo output socket 1240, theUSP plug 2220, theEthernet interface socket 2230, thevideo input plug 2240 correspond to theUSB socket 122, thevideo output terminal 124, theUSB socket 222, theEthernet socket 223 and thevideo input terminal 224 of thenetwork camera system 1 according to the first embodiment. - When the
lock release button 2270 is depressed, the lockingclaws 2260 are moved in a direction opposite to the biased direction so that the engagement of the lockingclaws 2260 with theside wall 1100 a is released. - The guide pins 2250 are protruded from the
side wall 2000 a. The guide pins 2250 are received by the guide holes 1250 formed on theside wall 1100 a of thedigital camera 1100, thereby the positional relationship between thedigital camera 1100 and theadapter device 2000 is restricted. On a side wall 2000 b, which is opposite to theside wall 2000 a of theadapter device 2000, anEthernet interface socket 2230 is provided. - When the
adapter device 2000 is coupled to thedigital camera 1100, the guide pins 2250 are inserted in the guide holes 1250. Then, the lockingclaws 2260,video input plug 2240,USB plug 2220 face the lockingclaw insertion holes 1260,video output socket 1240 and theUSB socket 1220, respectively. As the lockingclaws 2260 engage with theside wall 1100 a as described above, the terminals are electrically connected, and theadapter device 2000 are firmly coupled to thedigital camera 1100. As described above, by depressing thelock release button 2270, theadapter device 2000 can easily be detached from thedigital camera 1100. - As described above, by depressing the
lock release button 2270, the engagement of the lockingclaws 2260 with the insertion holes 1260 is released, and theadapter device 2000 can be detached from thedigital camera 1100. - According to the configuration of the second embodiment, the
adapter device 2000 can be coupled to and detached from thedigital camera 1100 easily. Further, since no cables are required when theadapter device 2000 is coupled to thedigital camera 1100, the entire system can be made compact. - As described above, according to the invention, the functions of the digital camera can be used efficiently. Regarding the monitor image (moving image), for which the response is important, the image generated by the digital camera is efficiently used. Regarding the functions requiring interactivity with respect to the camera, such as operation control or transmission of high-resolution images, by making use of the USB interface, which is provided in the digital camera, transmission of control commands and/or high-resolution image data can be executed.
- Accordingly, the adapter device is only required to have additional functions which are not provided in the digital camera and are necessary to configure the network camera system described above. Since commercial digital camera may be provided with the functions described above, an inexpensive network camera system can be configured relatively easily.
Claims (5)
1. A network camera system including at least one client, a digital camera and an adapter, said client and said adapter being connected with each other through a network, said camera comprising:
an image capturer;
an analog video signal outputter that outputs an analog video signal representing a moving image captured by said image capturer;
a digital image signal outputter that outputs a digital image signal representing a still image captured by said image capturer;
a control command receiver; and
an operation controller that controls an operation of said camera in accordance with the control command received through said control command receiver;
said adapter comprising:
a file server that receives the digital image signal from said camera and stores an image file representing the still image captured by said image capturer, said file server allowing said at least one client to download the image file from said file server through the network;
a streaming server that receives the analog video signal from said camera and creates streaming data corresponding to the received video signal, the streaming data being transmitted to said client through the network;
an adapter command receiver that receives an operation command from said client through the network; and
an adapter command transmitter that transmits a control command corresponding to the operation command to said camera, and
said client comprising:
a browser that downloads the image file from said file server and displays an image represented by the image file, said browser being capable of processing the streaming data and displaying the moving image represented by said streaming data; and
a client command transmitter that allows an operator to input an operation command indicative of an operation to be executed by said camera and transmits the operation command to said adapter through the network.
2. The network camera system according to claim 1 , wherein the operation to be executed by said camera includes capturing a still image when the operation command is input to said client command transmitter by the operator.
3. The network camera system according to claim 1 , wherein the digital image signal representing the captured image output by said digital image signal outputter is received by said file server and stored in said adapter.
4. The network camera system according to claim 1 , wherein the operation to be executed by said camera includes at least one of zooming operation of said camera, capturing a still image and adjustment of brightness of an image captured by said camera.
5. The network camera system according to claim 1 , wherein a resolution of the still image is greater than that of the moving image.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/512,560 US20090290031A1 (en) | 2002-03-13 | 2009-07-30 | Adapter device for image capturing device |
Applications Claiming Priority (4)
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JP2002-068434 | 2002-03-13 | ||
JP2002068434 | 2002-03-13 | ||
US10/385,470 US7587738B2 (en) | 2002-03-13 | 2003-03-12 | Adapter device for image capturing device |
US12/512,560 US20090290031A1 (en) | 2002-03-13 | 2009-07-30 | Adapter device for image capturing device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/385,470 Division US7587738B2 (en) | 2002-03-13 | 2003-03-12 | Adapter device for image capturing device |
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US20090290031A1 true US20090290031A1 (en) | 2009-11-26 |
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ID=28034975
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US12/512,560 Abandoned US20090290031A1 (en) | 2002-03-13 | 2009-07-30 | Adapter device for image capturing device |
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US10/385,470 Active 2025-02-25 US7587738B2 (en) | 2002-03-13 | 2003-03-12 | Adapter device for image capturing device |
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Also Published As
Publication number | Publication date |
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JP4195625B2 (en) | 2008-12-10 |
JP2003338971A (en) | 2003-11-28 |
US7587738B2 (en) | 2009-09-08 |
US20030177500A1 (en) | 2003-09-18 |
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Owner name: AXIS AB, SWEDEN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HOYA CORPORATION;REEL/FRAME:025865/0551 Effective date: 20110120 |
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STCB | Information on status: application discontinuation |
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