WO2004056117A1 - カメラ制御システム、カメラサーバ、クライアント、制御方法及び記録媒体 - Google Patents
カメラ制御システム、カメラサーバ、クライアント、制御方法及び記録媒体 Download PDFInfo
- Publication number
- WO2004056117A1 WO2004056117A1 PCT/JP2003/015896 JP0315896W WO2004056117A1 WO 2004056117 A1 WO2004056117 A1 WO 2004056117A1 JP 0315896 W JP0315896 W JP 0315896W WO 2004056117 A1 WO2004056117 A1 WO 2004056117A1
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- WO
- WIPO (PCT)
- Prior art keywords
- camera
- client
- control
- time
- server
- Prior art date
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Classifications
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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
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
- H04N7/185—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source from a mobile camera, e.g. for remote control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/63—Control of cameras or camera modules by using electronic viewfinders
- H04N23/631—Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters
- H04N23/632—Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters for displaying or modifying preview images prior to image capturing, e.g. variety of image resolutions or capturing parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
- H04N23/661—Transmitting camera control signals through networks, e.g. control via the Internet
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/695—Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects
Definitions
- Camera control system camera server, client, control method, and recording medium
- the present invention provides a camera control system, a camera server, and a camera that appropriately manage a plurality of clients connected to a camera server that controls one camera having functions such as pan, tilt, and zoom.
- the present invention relates to a client, a control method, and a recording medium. Background art
- a network camera not only the video distributed from the video camera is observed, but also, for example, a WWW (World Wide Web) server (hereinafter, also referred to as a “camera server”) on the network. ), A computer-controllable video camera is connected to the camera, and functions such as panning, tilting, and zooming of the camera are connected via a network. A system that enables control from a remote client is also being developed.
- WWW World Wide Web
- the present invention appropriately assigns all clients desiring force camera control so that operation commands are issued to the camera server from only one client at any time.
- Another object of the present invention is to provide a camera control system, a camera server, a client, a control method, and a recording medium that enable a camera server to execute an operation intended by a client by managing and controlling the camera.
- the camera control system includes a camera server that controls a camera capable of controlling an imaging angle, and a plurality of clients that controls the camera and displays an image transmitted from the camera server on a display screen.
- a camera control system composed of a camera when a camera server receives a control authority acquisition request issued by one client for controlling the camera, the camera server transmits the request to the client.
- a notifying means is provided for notifying the time information including a waiting time until the control can be performed and a control permission time for permitting the control for a predetermined time after the elapse of the waiting time.
- the camera server control method of the present invention has a force camera capable of controlling an imaging angle, and transmits a video photographed by the camera to the client in accordance with an instruction from a remote client.
- a control server control method when a control authority acquisition request for controlling this camera issued from one client is received, a waiting time until the camera can be controlled for this client and After the elapse of the waiting time, time information including a control permission time for permitting control for a predetermined time is notified.
- the method for controlling a client of the present invention is a method for controlling a client connected to a camera server that transmits an image captured by a power camera capable of controlling an imaging angle.
- a request to obtain control authority to control the camera is issued by the camera server that issues the request and the identification information of this client, and is returned from the camera server that has received the request to obtain control authority and the identification information, until the camera can be controlled.
- the camera server when a control authority acquisition request is issued from a client to a camera server, the camera server notifies the client of the waiting time and the control permission time, and the client performs communication at least once.
- Figure 1 is a diagram showing an example of a camera control system.
- FIG. 2 is a diagram showing an example of the display screen of the client.
- FIG. 3 is a flowchart showing the control authority acquisition request command processing in the camera server of the present invention.
- FIG. 4 is a diagram showing an example of a transaction flow between the camera server of the present invention and a client.
- Fig. 5 shows the time lapse of the management table of the camera server of the present invention. It is a diagram showing an example of transition.
- FIG. 6 is a flowchart showing processing in the client of the present invention.
- FIG. 7 is a flow chart showing the processing of the management table of the camera server of the present invention over time.
- FIG. 8 is a diagram showing the concept of the management table.
- FIG. 9 is a diagram showing another example of the transaction flow between the camera server of the present invention and the client.
- Fig. 1 is a diagram showing an example of a general camera control system.
- 1 is a camera server for controlling an imaging device such as a video camera or a still camera (hereinafter referred to as a camera) la;
- 2 is a network (telecommunication line) such as the Internet;
- 3a, 3b, 3c Indicates a client that receives the services of Camera Camera 1 and the image of one Camera Camera 1 connected to the Internet, LAN (Local Area Network), etc., and multiple cameras connected to the same network
- This is a system for viewing on clients. It is used for surveillance applications or for traction applications such as WWW shopping and sightseeing spot introduction.
- the camera la transmits JPEG, MPEG compressed image data, and the like to each client in real time.
- the camera server 1 is a server that can access the WWW on the Internet 2 and is connected to the camera 1a to control the camera 1a in accordance with an operation from a client or to take an image with the camera 1a.
- Video data, etc., are distributed to each client accessing camera server 1.
- Camera 1a described here is, for example, bread, chill It has various functions such as port and zoom, and is connected to the Internet via the camera server 1 to which, for example, an IP address is assigned.
- the camera server 1 includes a CPU that performs various controls of the camera server, a non-volatile memory such as a ROM and an EEPROM that stores various control programs executed by the CPU, and a CPU that performs various controls.
- a network I / F that connects to a network such as a RAM, a modem, etc., which provides a work area necessary to perform the operation, a video I / F that receives video from the camera 1a, an IF for driving the camera, etc. It is a well-known device that can perform data communication with each other via a PCI bus or the like.
- Each of the clients 3a, 3b, and 3c includes a personal computer (hereinafter, referred to as a PC), other display devices such as an LCD (liquid crystal display), a recording medium such as a ROM, a WWW browser, and the like. Any device that can function as a terminal that can access network 2 may be used. In addition, it has an input device such as a keyboard or a pointing device.
- a PC personal computer
- other display devices such as an LCD (liquid crystal display)
- a recording medium such as a ROM, a WWW browser, and the like.
- Any device that can function as a terminal that can access network 2 may be used.
- it has an input device such as a keyboard or a pointing device.
- the network 2 is a telecommunication system that includes a wired LAN such as Ethernet (registered trademark), a wireless LAN compliant with standards such as IEEE (Institute of Electrical and Electronics Engineers) 800.2.11 in addition to the Internet. Line.
- a wired LAN such as Ethernet (registered trademark)
- a wireless LAN compliant with standards such as IEEE (Institute of Electrical and Electronics Engineers) 800.2.11 in addition to the Internet. Line.
- the camera 1 and each of the clients 3a, 3b, 3c are connected via the network 2, and the camera 1a connected to the camera server 1 in response to an operation request from the client.
- the desired operation can be performed, and the camera server 1 transmits the video data captured by the camera la to the client accessing the camera server 1.
- Figure 2 shows an example of a client display screen.
- 4 is LCD etc.
- Reference numeral 5 denotes an image display unit which receives images and images captured by the camera 1a via the network 2 and views the images and videos on a WWW browser.
- Reference numeral 6 denotes a panning operation for changing the camera position by clicking the arrow buttons in the direction in which the camera 1a is to be moved to the image currently displayed on the image display section 5 by panning and tilting.
- 'A tilt operation unit, and 7 and 8 are zoom operation units, respectively.
- Reference numeral 1 denotes a waiting time until the camera control permission described later is lowered, or a time display section indicating the control permission time and the remaining controllable time.Two time display sections are arranged and each time is displayed. It may be displayed.
- Reference numeral 9 denotes a camera operation unit display button (icon). By selecting this button with a pointing device such as a mouse, a control authority acquisition request is issued to the camera server 1. The entire camera operation unit including the above-described pan / tilt operation unit 6 and zoom operation units 7 and 8 is displayed.
- Reference numeral 10 denotes an administrator setting menu display button (icon), which is used by an administrator described later to make desired settings.
- the user selects the camera operation unit display button 9, and a client desiring to operate the camera first issues a control authority acquisition request command to the camera server 1.
- a client desiring to operate the camera first issues a control authority acquisition request command to the camera server 1.
- Camera server 1 that has received the control authority acquisition request responds to the client with the waiting time and the control permission time.
- Control permission time The time that can be controlled per client, which is set in the camera server in advance.
- Control time The remaining controllable time with the control permission time as the maximum
- a client who wants to operate the camera first issues a control authority acquisition request to the camera server 1 and the control authority acquisition request is received by the force camera server 1.
- the camera server 1 Upon receiving the control authority acquisition request, the camera server 1 records the client ID (identification information) sent together with the control authority acquisition request in a ROM or a non-volatile memory of the camera server 1 described later and manages the client ID. It is searched whether it exists in the management table being executed (step S2).
- step S3 If the client ID is in the management table, that is, if the same client has previously issued a control authority acquisition request, respond to the client with the waiting time and control permission time in the management table. Notify (step S3).
- a waiting time is calculated (step S4), and the calculated waiting time and the preset control permission time are responded to and notified to the client terminal. At the same time, the waiting time and the control permission time are registered in the management table in association with the client ID.
- control permission time per client is set to, for example, 30 seconds, and for example, the camera server in a case where the clients 3a, 3b, and 3c sequentially issue control authority acquisition requests at intervals of 10 seconds.
- Figure 4 shows the transaction flow between clients.
- the camera server 1 responds to the client 3a that first issued the control authority acquisition request with a wait time of 0 seconds and a control permission time of 30 seconds.
- the waiting time of the client that last issued the control authority acquisition request and the remaining control time are responded as a waiting time, and at the same time, a preset time is set.
- Respond the control permission time per client In this example, client 3b has 10 seconds behind client 3a, so Response time is 20 seconds and control permission time is 30 seconds.
- the client 3c since the client 3c is delayed by 10 seconds from the client 3b force, it responds with a waiting time of 40 seconds and a control permission time of 30 seconds.
- Fig. 6 shows a flowchart showing the processing in the client.
- the client server 1 After receiving the time and the control permission time (step S12), each client counts the number of seconds elapsed from the time when the response from the camera server 1 is received (step S13), and the waiting time has elapsed. Then, the control permission is notified to the client user (step S14), and the input of the operation command is prompted. Further, when the control time count ends, the control permission end is notified to the user (step S15), and the input of the user operation command is ended.
- the client may display the number of seconds to wait on the display screen 4 and notify the user that the input is waiting.
- the input operation unit is displayed to notify the user that the operation command can be input. For example, a message such as "You can operate the camera" may be displayed on the display screen 4. If the user is away from the client, it is effective to notify the user by voice. is there.
- the countdown of the remaining control time may be displayed on the display screen 4 at the same time.
- the display of the operation unit such as the pan / tilt operation unit 6 is hidden and the user is notified that input is not possible.
- a message such as “Operation time has ended” may be displayed on the display screen 4.
- the camera server 1 simply replies “waiting time” and “control permission time” in response to a control authority acquisition request from any client, and each client then receives the time information. Originally, appropriate By transmitting the camera operation command to the camera server 1 at an appropriate time, it is possible to transmit the operation command from only one client to the camera server 1 at any time. It is possible to manage the camera control authority of multiple clients connected to one camera server 1.
- the client When the client issues the control authority acquisition request, the client transmits the client ID recorded on the recording medium of the client terminal to the force mail server 1 at the same time.
- client ID for example, an IP address used to identify a host terminal on the Internet, a local IP address applied in a LAN, or the like may be used. The purpose will be sufficiently achieved even if it is created using random numbers of the order. Also, a combination of these may be used.
- a control authority acquisition request is issued to camera server 1 for the first time (ID is not registered in the management table described in Fig. 3). A client ID consisting of an arbitrary random number may be assigned.
- the camera server 1 manages the information of the waiting time and the control time based on the client ID.
- the management table as shown in Fig. 5 (A), (B) and (C) On a recording medium such as a ROM.
- the waiting time and the control time of the management table are updated at regular time intervals, for example, every 1 second ( Step S2 1).
- This makes it possible for the camera server 1 to manage the elapsed time information of a client whose control time has not ended at an arbitrary time. Further, information is deleted for the client whose time has passed and the control time has become 0 (step S22), and many clients Enable operation of camera 1a.
- FIG. 5 (A) shows the management table when the camera server 1 receives a control authority acquisition request from the client 3a followed by the client 3b.
- client IDs are temporarily registered as A and B, respectively.
- client 3a performed the camera control with a waiting time of 0 seconds and 10 seconds, so the remaining control time is 20 seconds, and client 3b has a waiting time of 20 seconds and the control time is The control permission time is 30 seconds.
- FIG. 5B shows a management table in the case where a control authority acquisition request is newly received from the client 3c 10 seconds after the above-mentioned FIG. 5A.
- client ID is temporarily registered as C. Since the count is 10 seconds from Fig. 5 (A), the control time of client 3a is reduced to 10 seconds, and the wait time of client 3b is reduced to 10 seconds, and updated. The client 3c has a waiting time of 40 seconds, and the control time is 30 seconds of the control permission time.
- FIG. 5 (C) shows the management table after the elapse of 10 seconds from Fig. 5 (B). Show. Since the count is 10 seconds from Fig.
- client 3a has a control time of 0 seconds
- client 3b has a wait time of 0 seconds
- client 3c has a wait time of 30 seconds. Reduced and updated. The information of the client 3a, for which the control time is 0 seconds and the camera operation has been completed, is deleted from the camera table 1 management table as indicated by the shaded area.
- This client ID contributes to giving only one controllable time to one client. That is, when the camera server 1 receives a control authority acquisition request command from the client, first, the client ID transmitted at the same time as the control authority acquisition request command is stored in the camera server 1. Search for the same client ID in the table. same If there is the same client ID, it responds to the client with the waiting time and control time in the management table. If not, calculate the waiting time from the waiting time and control time of the client permitted before this client, and respond to the client with the calculated waiting time and control permitting time. Add the client ID and time information to the list.
- FIG. 8 shows a conceptual diagram of the management table in this example.
- 60 indicates an information storage area on a non-volatile memory, for example.
- 50 pieces of information are stored in the information storage area 60.
- Fig. 8 shows the information storage state in the management table at the time of Fig. 5 (B), and the information for clients 3a, 3b, and 3c is an arbitrary three empty space in the five information storage units. Stored in space.
- the waiting time and the control time are registered in the order in which the control authority acquisition requests are issued, and the waiting time is registered. Use time and control time to manage up to 50 clients.
- the waiting time and the control time at the time when the client issues the control authority acquisition request are registered without any particular concern for the information storage location in the information storage area 60, and thereafter, the information is registered. It only counts these time information at fixed time intervals and sends the counted information to each client 3a, 3b, 3c, and also has control authority from the client. Since at least one acquisition request is required, the load on camera server 1 for managing the management table is reduced, and the server resources of camera server 1 can be given to other functions such as image transmission.
- the timing at which the controllable client is switched can be recognized on the camera parser 1 side based on the time information of the management table managing the client.
- a control command for stopping operations such as pan, tilt, and zoom is issued inside the camera 1a through the camera server 1, and the operation of the camera 1a is stopped for a certain period of time.
- This allows the camera to operate already when a new client tries to control, for example, when the operable client switches while the previous client is executing an operation command. Can be avoided, the operation can always be started while the camera is stopped, and client control that can be smoothly controlled can be performed.
- the time required for command transmission / reception between the camera server 1 and each of the clients 3a, 3b, and 3c varies, and the elapsed time measurement on the client side varies.
- an operation command from a previously controlled client may arrive at the camera server 1 with a delay, and the operation commands may conflict with each other and become new.
- the camera does not perform the intended operation of a client that can be controlled.
- an appropriate length of non-permission time is set so that no client is given the controllable time.
- FIG. 9 shows another example of the transaction flow between the camera server and the client in this example.
- FIG. 9 is the same as FIG. 4 except that a non-permissible time is provided, and the other configuration is the same.
- parts corresponding to FIG. If a control authority acquisition request is issued from client 3b 10 seconds after client 3a that issued the control authority acquisition request first, camera server 1 waits for client 3b. The time is reported as (20 + t) seconds, taking into account the disallowed time t. The control permission time is the same as for client 3a. After the control of the client 3a is completed and the client 3b waits for t seconds, the camera 3b can perform the camera control.
- the non-permission time t absorbs the above-mentioned variations and delays, and allows the force camera 1a to perform the intended operation of the client 3b, which has become the newly controllable time, as well as Clients can be switched so that they can be controlled smoothly.
- the control permission time given to one client is controlled by, for example, selecting the administrator setting menu display button 10 in Fig. 2. Display the permission time setting screen and enter the set value to make it possible to set the camera server 1 in advance. This allows the administrator of the camera server 1 to appropriately set the controllable time per client according to the purpose and demand of the camera server.
- the administrator of the camera server 1 can set in advance the maximum number of clients that can acquire control authority. Since the camera server 1 has information on clients whose control time has not expired in the management table, it is necessary to know the number of clients that have been given the control permission time at any time. Can be done. If this number of clients exceeds the set maximum number of clients, a new control authority acquisition request can be rejected. The waiting time can be shorter than a certain time.
- the control authority of the camera can be distributed to many clients without waste, and many client users can receive the authority from the camera. You can watch the video.
- the camera server and the client perform communication at least once, and the camera server appropriately manages the control authority of the plurality of clients. Operation requests from the client do not conflict and the client 2003/015896
- the camera server can execute the action that has been performed.
- the finite network bandwidth can be used effectively.
- the camera server since the camera server performs most of the operations and processes necessary for the camera server to properly manage the control authority of the plurality of clients, the load on the camera server is reduced. This has the advantage that server resources can be given to other functions, such as sending images, for example.
- the present invention provides a recording medium storing a program code of software for realizing the functions of the above-described embodiment to a system or an apparatus, and a combination medium of the system or the apparatus. Needless to say, this can be achieved also by causing the (or a control device such as a CPU) to read and execute the program code stored in the recording medium.
- a recording medium for supplying the program code in this case for example, a floppy disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a non-volatile A memory card, ROM, or the like can be used.
- the present invention is not limited to the above-described embodiment, but may take other various configurations without departing from the gist of the present invention.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03780731.0A EP1475968B1 (en) | 2002-12-13 | 2003-12-11 | Camera control system, camera server, client, control method, and recording medium |
US10/504,405 US7210863B2 (en) | 2002-12-13 | 2003-12-11 | Camera control system, camera server, client, control method, and recording medium |
US11/789,589 US7794161B2 (en) | 2002-12-13 | 2007-04-25 | Camera control system, camera server, client, control method, and recording medium |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002362686A JP3747908B2 (ja) | 2002-12-13 | 2002-12-13 | カメラ制御システム、カメラサーバ及びその制御方法 |
JP2002-362686 | 2002-12-13 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10504405 A-371-Of-International | 2003-12-11 | ||
US11/789,589 Continuation US7794161B2 (en) | 2002-12-13 | 2007-04-25 | Camera control system, camera server, client, control method, and recording medium |
Publications (1)
Publication Number | Publication Date |
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WO2004056117A1 true WO2004056117A1 (ja) | 2004-07-01 |
Family
ID=32588168
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/015896 WO2004056117A1 (ja) | 2002-12-13 | 2003-12-11 | カメラ制御システム、カメラサーバ、クライアント、制御方法及び記録媒体 |
Country Status (5)
Country | Link |
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US (2) | US7210863B2 (ja) |
EP (1) | EP1475968B1 (ja) |
JP (1) | JP3747908B2 (ja) |
CN (1) | CN100361532C (ja) |
WO (1) | WO2004056117A1 (ja) |
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CN1692650A (zh) | 2005-11-02 |
JP2004194217A (ja) | 2004-07-08 |
EP1475968B1 (en) | 2019-03-13 |
US20050078180A1 (en) | 2005-04-14 |
EP1475968A1 (en) | 2004-11-10 |
CN100361532C (zh) | 2008-01-09 |
US20070201849A1 (en) | 2007-08-30 |
JP3747908B2 (ja) | 2006-02-22 |
US7794161B2 (en) | 2010-09-14 |
EP1475968A4 (en) | 2011-05-18 |
US7210863B2 (en) | 2007-05-01 |
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