JP2009200973A - Camera control system, camera control method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera control system and camera control method having improved operability for proper and efficient control. <P>SOLUTION: A camera client device includes a control right acquisition request issuing means for issuing an acquisition request of the control right of a camera and a suspend request issuing means for requesting suspend of the control right of the camera. A camera server device includes a control right management means for managing the control right acquisition request of the camera client device that has issued the control right acquisition request, a control right forfeiting means for forfeiting the control right from the camera client device that has issued the forwarding request, and a re-registration means for registering the camera client device again. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a camera control system suitable for use in, for example, a TV conference system or a surveillance camera.

  2. Description of the Related Art Conventionally, there is a camera control system that can control a video input device from a remote place such as a TV conference system or a surveillance camera. In this type of apparatus, it is common for a single supervisor to control a plurality of cameras. That is, the number of video input devices is larger than the number of controllers, and a plurality of controllers do not control one video input device at the same time.

  In recent years, due to the spread of the Internet and the like, there is an increasing demand for a plurality of users to view a video captured by a single video input device and to control the video input device from a plurality of users. In such a case, a mechanism for managing control requests for a plurality of video input devices from a remote place or the like is required.

  In addition, when one video input device is controlled by a plurality of users, it is clear that a control request conflict occurs between the plurality of users. Therefore, it is necessary to appropriately manage and control the authority for the operation of the video input device. In view of such technical trends, Patent Literature 1, Patent Literature 2 and Patent Literature 3 propose video input systems that manage control requests and control rights for cameras and enable camera control.

Japanese Patent Laid-Open No. 10-42278 JP-A-10-136347 JP-A-10-304239

  In a situation where a large number of people can access one camera from a remote location via a network and control the camera, it is not always possible to acquire the camera control right at the convenience of the user who requested the camera control right.

For example, when the camera control right is acquired, the user who has acquired the camera control right may not be convenient and the camera may not be controlled. In that case, a user who has not been able to control despite having acquired the control right will waste the control right that has been acquired, and if he requests again, he must wait until the control right can be acquired from the beginning. .
Furthermore, when the number of clients requesting the control right is limited, the control right request may not be accepted when the control right is requested again. In addition, other users who are waiting for a camera control right can watch the fixed point video while the user who has acquired the control right does not control the camera while the user has acquired the control right. I could only wait until the user's control time was over.
In view of such circumstances, an object of the present invention is to provide a camera control system and a camera control method that are appropriately and efficiently controlled and excellent in operability.

The camera control system of the present invention is a camera control system capable of remotely controlling a camera connected to a camera server device from a plurality of camera client devices,
In each of the camera client devices,
A control right acquisition request issuing means for issuing a control right acquisition request of the camera;
A forward request issuing means for requesting the camera control right advance,
In the camera server device,
In response to the control right acquisition request issued by the control right acquisition request issuing means, control right management means for managing the control right acquisition request of the camera client device that has issued the control right acquisition request;
Control right deprivation means for depriving the control right of the camera client device that issued the deferral request to the deferral request issued by the deferral request issue means;
Re-registration means for re-registering the camera client device that has issued the advance request.

The camera control method of the present invention is a camera control method capable of remotely controlling a camera connected to a camera server device from a plurality of camera client devices,
Issuing a control right acquisition request for issuing a control right acquisition request of the camera;
A forward request issuing step for requesting the camera control right forward;
A control right management step for managing a control right acquisition request of the camera client device that has issued the control right acquisition request in response to the control right acquisition request issued in the control right acquisition request issuing step;
In response to the advance request, a control right deprivation step of depriving the control right of the camera client device that issued the advance request;
And a re-registration step of re-registering the camera client device that has issued the forward-feed request.

According to the present invention, in a remote camera control system that manages control requests from a plurality of user-side devices related to cameras, it is time-consuming to request a control right again when the control right is lost by deferring the control right acquired by the user. Can be omitted.
Further, even when the number of clients requesting the control right is limited, it is possible to reliably request the control right.
Further, it becomes possible to efficiently grant the control right to the client requesting the control right, and the operability for the user is improved.

Hereinafter, preferred embodiments of a camera control system, a camera control method, and a program according to the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a block diagram showing the configuration of the camera system according to the present embodiment. In the figure, reference numeral _1-1 denotes a camera server device such as a computer that performs camera control. Reference numeral 12 denotes a network, such as a LAN, WAN, or the Internet. 1 _-2, 1 _-3, 1 _-4, 1 _-5, ... are issues a command of the camera control from a remote location, a remotely controllable camera client device.

That is, the camera server device _1-1 takes in video data from the video camera, outputs the data to the client, and controls the camera in response to a camera control command from the camera client.
In the camera client apparatus 1 _-2 to 1 _-n, receives the video data from the camera server device 1 _-1 display images. Further, the camera client devices 1 _-2 to 1 _-n can control the camera by outputting a control right acquisition request for the camera control right to the camera server device _1-1 and acquiring the camera control right. Here, it is assumed that exclusive control is performed so that camera control cannot be performed simultaneously by a plurality of camera clients.

In the camera server apparatus _1-1 , 11a is a camera that captures an image, and the image viewpoint such as pan, tilt, zoom, and the like can be controlled by an external command. A camera control unit 11b controls the camera in response to a request from a remote place. A control right management unit 11c manages the control right of the camera in response to requests from a plurality of camera clients.

Further, 11d is a message transmitting and receiving unit, which receives messages from the camera client apparatus 1 _-2 like via the network 12, and transmits the message to these cameras client. 11e is a video transmission unit, and transmits the image obtained from the camera 11a to the camera client apparatus 1 _-2 to 1 _-n via the network 12.

In the camera client apparatus 1 _-2, 13a is a message transceiver exchanges camera server apparatus _1-1 and the message via the network 12. A display unit 13b displays an image, a control state, and the like received from the camera server device _1-1 . 13c is an operation input unit, to the camera server 1 _-1, request issue and control right acquisition of the camera control right, the pan angle of the camera 11a, the tilt angle, and inputs the change instruction or the like of the zoom value. Reference numeral 13d denotes a video receiving unit that receives a video transmitted from the camera server apparatus _1-1 via the network 12.

In the configuration of FIG. 1, the camera number of servers and cameras client do not limited the scope of the illustration, a plurality of cameras to the camera server apparatus 1 _-1 may be connected.

FIG. 2 is a block diagram showing a system configuration of the camera server device and the camera client device according to the present embodiment. 1 _-1 is a camera server apparatus, 1 _-2 to 1 _-n denotes a camera client device.

Next, the configuration of the camera server device _1-1 will be described. Camera server device 1 _-1, the video camera 1 _-11 video camera 1 _-11 pan, the camera control circuit 1 _-12 for controlling the tilt and zoom magnification, video capture 1 to capture images from the video camera 1 _{11 - 13} In addition, it has a network interface _1-14 that delivers captured video data to the network 12, a CPU _{1-16 that} functions as a management means for controlling the modules, and a main storage device _1-15 . Also configured by including a secondary storage device 1 _-17, such as a hard disk for storing a control program for controlling the camera server apparatus _1-1.

The CPU _1-16 receives a camera control command through the network interface _1-14 , and executes camera pan, tilt, and zoom control on the camera control circuit _1-12 . The video capture 1 _-13, captures the video signal such as NTSC from the video camera 1 _-11 after A / D conversion, and data compression by accessing the camera server apparatus 1 _-1 from the network interface 1 _-14 Output to the current camera client device. As the image compression method of the video capture 1 _-13, there is such MotionJPEG, it does not stick to it.

1 _-19 timer counts the time based on the instruction of the CPU 1 _-16, to generate events for a timeout is detected CPU 1 _-16, camera clients that want to control the video camera 1 _-11 Used to manage control rights to the device. _1-18 is a system bus for connecting the aforementioned units.

Next, the configuration of the camera client devices 1 _-2 to 1 _-n will be described. Configuration and operation processes of the camera client apparatus 1 _-2 to 1 _-n, in this embodiment is the same thing, here illustrating the configuration of a camera client apparatus 1 _-2.
Compressed video data output from the camera server apparatus 1 _-1 to the network 12 is received through the network interface 1 _-24, extended by CPU 1 _-22, the captured image is displayed on the bit map display 1 _-21. For example, a user interface screen as shown in FIG. 3 is displayed on the bitmap display _1-21 .

On camera client apparatus 1 _-2, by executing a program stored in the secondary storage device 1 _-26, such as a hard disk by the CPU 1 _-22, we are running a window system comprising a screen as shown in FIG. 3 . The main memory _1-23 constituted by a RAM or the like expands a program stored in the secondary storage device _1-26 , and the CPU _1-22 calls a program as needed from the main memory _1-23. . Mouse _1-25 is a pointing device. By moving the cursor on the user interface as shown in FIG. 3 and performing a drag operation or the like, the user operating the camera client at a remote location is controlled to control the video camera _1-11 on the camera server side. I have to.

Next, the data configuration of the main storage device _1-15 will be described. An identifier buffer _1-131 is used to record and hold the identifier of the camera client device to which the camera control right is given. _{Reference numeral 1-132} denotes a waiting buffer list, which manages the identifiers of camera client apparatuses that request camera control rights.

For example, when a certain camera client device has acquired the camera control right and another client issues a camera control request, the identifier of the camera client device that issued this camera control request is added to the waiting buffer list _1-132 . sign up.
Also, when the camera client device loses the control rights having the identifier registered in the identifier buffer 1 _131, and registers the identifier was first registered with the identifier buffer 1 _131, deletes from the queue buffer list 1 _-132 . That is, the waiting buffer list _1-132 operates as a queue (FIFO) that manages the identifiers of camera client devices that are requesting camera control rights.

1 _-133 is a destination table, and manages the identifier of the camera client apparatus 1 _-2 to 1 _-n for transmitting image information captured by the camera server apparatus _1-1. In the initialization process, the camera client device transmits a video transmission request message requesting registration in the transmission destination table together with its own identifier to the camera server device. The camera server device registers the received identifier of the camera client device in the transmission destination table _1-133 .

The camera server device transmits the video information from the video camera _1-11 to the camera client device having the identifier registered in the transmission destination table _1-133 . When the application of the camera client device is terminated, in the termination process, the camera server device is requested to stop transmission of video information. In response to the request, the camera server apparatus deletes the identifier of the camera client apparatus to be ended from the transmission destination table _1-133 of the camera server.

A button 502 in FIG. 3 is a button for transmitting a request relating to the camera control right to the camera server apparatus _1-1 . The display on the button 502 changes depending on the camera control state of the client, and “control right acquisition” is displayed when there is no camera control right, and “control right advance” is displayed when the camera control right is acquired. Reference numeral 503 denotes a display window for displaying the current control right state.

FIG. 4 is a diagram showing an example of the button 502 and the display window 503 in the frame 501 shown in FIG.
(d) is an example in which the waiting time calculated in the state of “with control right” is displayed as a numerical value as it is.
(c) shows an example in which the calculated waiting time is displayed with an indicator in the state of “with control right”.
(b) is an example in which the calculated waiting time display is indicated by an indicator in the state of “requesting control right”.
In (b), the graphic of the indicator is different from the case of “with control right”, so that it can be recognized at a glance whether it is “with control right” or “control right requested”. Note that the waiting time display of “requesting control right” in (b) has a human shape, for example, and one human pattern may correspond to one client in the control queue.
Further, (a) is a display example of the display window 503 in the case of “no control right”, and no waiting time is displayed. Further, (e) shows the display state of the display window 503 during control right extension.

When the user wants to control the video camera _1-11 , the user clicks the button 502 displayed as “Acquire control right”, issues a camera control right acquisition request, and outputs it to the camera server. If the control right cannot be acquired, the control right is being requested, and the inside of the frame 501 is displayed as shown in FIG. When the control right can be acquired, the frame 501 is displayed as shown in FIG. 4C or FIG. 4D, and by clicking the button 502, “control forward” can be performed.

If the remaining time becomes 0 in the state of “with control right” or the control is released by clicking the button 502, the control right release command is issued, and the control right is received by another camera client requesting the control right. Passed.
When the remaining time becomes 0 in the state of “with control right”, if there is no camera client requesting the control right other than the client, the control right is extended, and the inside of the frame 501 is as shown in FIG. Is displayed.
In addition, when the control is forwarded by clicking the button 502 in the state of “with control right”, if there is no camera client apparatus requesting the control right other than the client, the camera control right is continued as usual. .

Hereinafter, the operation of the camera server 1 _-1 will be described with reference to the flowchart of FIG. The control program for executing this control is stored in the secondary storage device 1 _-17, loaded at run time to the main memory 1 _-15, and is executed by the CPU 1 _-16.

First, in step S510, initialization processing for setting the pan and tilt angles and zoom magnification of the video camera _1-11 to a specific initial position is performed, and then the process proceeds to step S520. If any event occurs, the process proceeds to step S530. If it is a camera control command from the client, the process proceeds to step S531, and it is determined whether or not the identifier of the client that transmitted the control command matches the identifier registered in the identifier buffer _1-131 . If they match, the process proceeds to step S532, and camera control is executed according to the control command.

In the event waiting state of step S520, the process proceeds to step S540, and if it is a camera control right acquisition request event, the process proceeds to step S541, whether or not the camera control flag is turned on, that is, the video camera camera 1 _{− to be controlled.} Determine if ₁₁ is controlled.
If the video camera _1-11 is not controlled by another camera client, the process proceeds to step S543, and the in-control flag indicating that the video camera _1-11 is under control is turned on. Then the process proceeds to step S544, the timer 1 _-19 resets, at step S545, and stores the identifier of the camera client accepts the control (included in the received control request) to the identifier buffer 1 _-131. In step S546, the camera client is notified that the control right has been acquired.

On the other hand, the video camera 1 _-11 in step S541 is the case in the control from other cameras client, the process proceeds to step S542, and registers by adding the identifier of the client device to wait buffer list 1 _-132.

Occurred event in step S520 is, when the time set at the timer 1 _-19 was Timer ignition event due to the elapse, the process proceeds from step S550 to step S551. Then, the camera server apparatus _1-1 removes the control right from the camera client that currently holds the camera control right.

Here, the camera client is notified that the control right of the camera client of the identifier stored in the identifier buffer _1-131 has been taken. Then, it is checked whether there is a camera client in the control right request that is registered currently in the buffer list 1 _-132 waits in step S552, unless it proceeds to step S553, the camera control flag to OFF. Then, control is performed so that the shooting state of the video camera _1-11 is returned to a specific initial position.

  If the timer is fired when there is no camera client requesting the control right, the control right is continuously allowed until another control right request is received from another camera client. When a control request is received from another camera client, if the control right is deprived and permitted, it is possible to realize a state in which the control right is being extended.

On the other hand, if there is a camera client for which a control right is requested in step S552, the process proceeds to step S554. The camera client corresponding to the identifier held at the head of the waiting buffer list _1-132 is set as the camera client to which the next control right is given. Then, it is registered in the identifier buffer _1-131 . In step S555, the timer _1-19 for monitoring the control time of the camera client that has newly acquired the control right is initialized and time measurement is started. In step S556, the camera client having the identifier is notified that the control right has been acquired.

If it is a control postponed message in step S560, the process proceeds to step S561, and it is checked whether there is a requesting camera client apparatus registered at present in the waiting buffer list _1-132 . If so the process proceeds to step S562, the camera server apparatus 1 _-11 deprive the control right from the camera client that currently hold the camera control right. Here, the camera client is notified that the control right of the camera client of the identifier stored in the identifier buffer _1-131 has been taken.

Then the camera client corresponding to the identifier held in the beginning of the buffer list 1 _-13 waits in step S563, the camera client then giving the control right, is registered in the identifier buffer 1 _-131. In step S564, the timer _1-19 for monitoring the control time of the camera client that has newly acquired the control right is initialized to start timing. The camera client that has transmitted the control postponed message in step S565 is registered again in the waiting buffer list _1-132 .

  Here, the camera client registered in the waiting buffer list is notified of the individual waiting time changed by the advance processing. When the notification ends, the process advances to step S566 to notify the camera client of the identifier that the control right has been acquired.

Camera server in step S570 is, when receiving the video transmission request message of the camera client startup, in step S571, and registers and updates the identifier of the camera client received in the destination table 1 _-133. The camera server in step S570 is, when receiving a camera client at the end of the video transmission stop request message, in step S571, deletes and updates the identifier of the camera client received from the destination table 1 _-133. After the update, the video information is transmitted to the camera client having the identifier registered in the transmission destination table _1-133 .

Then, in the following with reference to the flowchart of FIG. 6, the operation process of the camera client 1 _-2 camera control process in this embodiment. A control program for executing this control is stored in the secondary storage device _1-26 . Then, it is loaded into the main memory _1-23 that functions as a storage means at the time of execution, and is executed by the _CPU1-22 .

First, in step S610, initialization processing such as transmission of various parameters, flags, and a video transmission request message is executed, and then the process proceeds to step S620. If any event occurs, the process advances to step S630 to check whether it is a camera control command. If it is a camera control command, the process advances to step S631 to determine whether or not the control right acquisition flag is ON, that is, whether or not the camera control right is acquired. If the flag is ON, the process proceeds to step S632, and transmits the camera control instruction to the camera server apparatus _1-1.

In step S640, if it is a camera control right acquisition request event, the process proceeds to step S641, and it is confirmed whether or not the control right flag is OFF. Then, if has won their camera control right, the process proceeds to step S642, and transmits the camera control right request message to the camera server apparatus _1-1.

In step S650, if it is a camera control post-forward request event, the process proceeds to step S651 to check whether the control right flag is ON. If control right flag if ON, he proceeds to Step S652 it is determined that the acquired camera control right, and transmits a message requesting deferred to the camera server apparatus _1-1.

  In step S660, if it is an event to end the application of the camera client, in step S661, end processing such as transmission of a video transmission stop request message and network disconnection is performed, and this control program ends.

In step S670, when receiving the camera control right acquisition notification that the camera client from the camera server apparatus _1-1 is able to acquire the control right, the process proceeds to step S671, to ON control right flag. Camera client step S680, when the camera server apparatus _1-1 receives the camera control right loss notification, in step S681, the control right flag to OFF.

In step S690, the camera server apparatus _1-1, when receiving the wait information about the current camera control right, the process proceeds to step S690. Output to the camera control user interface screen displayed on the bitmap display _1-21 the waiting time until acquisition of the current camera control right included in the waiting information and the number of camera clients currently requesting the camera control right To do.

  As described above, when the video camera control right is sequentially given to a plurality of camera clients, the camera server determines the status at that time in response to the control right forward request message from the camera client having the camera control right. And process. The control right can be postponed by transmitting the result to the camera client.

(Second Embodiment)
Next, the second embodiment of the present invention will be described with reference to FIG. The description of FIGS. 1 to 5 is the same as that of the first embodiment, and will be omitted. The description of FIG. 6 is replaced with the description of FIG. 7, and differences from the first embodiment will be described.
In the following with reference to the flowchart of FIG. 7, the operation process of the camera client apparatus 1 _-2 camera control process of this embodiment. The control program for executing this control is stored in the secondary storage device 1 _-26, it is loaded into the main memory 1 _-23 which functions as a memory means at runtime, and is executed by the CPU 1 _-22.

Camera client apparatus 1 _-2 in this embodiment uses the timer 1 _-28, the camera client time constant since won camera control right, the user is monitored whether using a camera client. When the camera client is not used for a certain period of time, it is automatically determined that the user has no control intention at the present time, and a control right forward message is transmitted. Here, “using the camera client” is defined as displaying the user interface screen of the camera client on the foreground on the bitmap display.

When the camera control right acquisition notification is received from the camera server in step S670, the control right flag is turned ON in step S671. The process proceeds to step S672, the camera control user interface on a bit-mapped display 1 _-21 to determine whether it is displayed in the foreground. If the camera control user interface is not displayed in the foreground, the process proceeds to step S673, where the timer _1-28 is initialized to start monitoring to determine whether or not there is a camera control intention.

  If the camera control user interface is displayed in the foreground in step S6100, the process advances to step S6101, and it is determined whether the timer set in step S673 is ON. If the timer is ON, it is determined that the user has an intention to control the camera at the present time, and the timer is turned OFF in step S6102, and the monitoring is terminated.

  When a camera control command is received in step S630, it is determined that the user has a camera control intention even when a camera control message is transmitted in step S632, and the timer is turned OFF in step S633. If the timer is ignited in step S650, the process proceeds to step S651 on the assumption that the process of determining that the user has the control intention has not been performed for a certain period of time from the acquisition of the control right. At this time, if the control right flag is ON, a forward message is transmitted to the camera server in step S652.

  In the present embodiment, “using the camera client” is defined as “displaying the user interface screen of the camera client on the foreground on the bitmap display”. For example, if the mouse operation is monitored and there is no mouse input for a certain period of time, it is determined that the camera client is not used, or if the screen saver is activated on the camera client, It is judged that it is not used.

Alternatively, it may be determined that “the camera client is used” if only the area for displaying the client a priori video is displayed on the bitmap display.
In this embodiment, when it is detected that the camera client is not used, the camera client actively transmits a message to the camera server to realize automatic postponement of the control right.

  However, the camera server may be configured to realize automatic post-transmission in a form in which the camera server actively operates by inquiring about the usage status of the client a priori from the camera client having the control right. For example, when it is detected that the camera server has not received a camera control command for a certain period of time, the usage status is inquired from the camera server to the client a priori. When the camera client replies “not using the camera client” in response to the usage status inquiry from the camera server, the camera server removes the control right from the camera client. Here, the camera client may be configured to detect that the control right has been deprived and transmit a message requesting the postponement of the control right to the camera server.

  Alternatively, the camera server may be configured to re-register the camera client in the waiting buffer list when the camera server has revoked the control right of the camera client. When the camera server reregisters the camera client in the waiting buffer list at the same time as the removal of the control right, the camera server is recalculated by the forward processing for all the camera clients registered in the waiting buffer list. Notify the waiting information. All camera clients that have received the waiting information update the waiting time display on the user interface. In this way, the camera server may be the main component so that the control right can be postponed.

  In the present embodiment, the number of times of advance is not particularly limited, but the number of advance may be limited to n times continuously. When control of the number of forwards is performed on the camera server side, for example, as the information of each camera client managed by the camera server, n flags indicating that control is being performed when forwarded are provided. Each time a camera client's control right is deferred, the camera server sets one flag for that camera client. When the control right of the camera client is lost due to timeout, the camera server clears all the flags of the camera client. If all the n flags are set when the advance processing is performed, the advance processing is not executed.

  Further, when controlling the number of advance operations on the camera client side, for example, n flags indicating that control is being performed when the camera client is advanced is provided. When the camera client requests the camera server to postpone the control right and the control right is revoked while leaving the control time, the camera client sets one flag. When the control time is used up and the control right is lost, the camera client clears all the flags. When all the n flags are set when the advance request is issued, the advance request is not transmitted to the camera server. As described above, a limit may be imposed on the number of continuous advance feeds.

  In the present embodiment, no parameter or the like can be specified regarding the postponement of the control right, but it may be configured to be able to designate, for example, the postponement of the control authority by n persons. In order to make it possible to designate the post-transmission after n people, for example, when the user of the camera client requests the postponement of the control right, it designates the post-transmission by n people and transmits it to the camera server. The camera server receives the number n that is sent back by n persons together with the request for postponing the control right, and confirms the number of camera clients registered in the waiting buffer list.

  If the number of camera clients registered in the waiting buffer list is n or more, the identifier of the camera client that requested n-th forward from the head of the waiting buffer list is inserted. When the number of camera clients registered in the waiting buffer list is less than n, the identifier of the camera client that has requested the forward transfer is registered at the end of the waiting buffer list. In any case, the camera server notifies the waiting information to all the camera clients registered in the waiting buffer list when a change is made to the waiting buffer list. The camera client that has received the waiting information updates the waiting time display on the user interface. As described above, it may be possible to specify that the post-feed is performed after n persons.

It is a figure which shows the structure of the camera control system in the 1st Embodiment of this invention. It is a figure which shows the structure of the camera control system in the 1st Embodiment of this invention. It is a figure which shows the user interface screen of the camera control system in the 1st Embodiment of this invention. It is a figure which shows the example of a combination in the frame 501 of FIG. It is a flowchart which shows the processing flow of the camera server in the 1st Embodiment of this invention. It is a flowchart which shows the processing flow of the camera client in the 1st Embodiment of this invention. It is a flowchart which shows the processing flow of the camera client in the 2nd Embodiment of this invention.

Explanation of symbols

1 _-1 Camera server device 1 _-2 Camera client device 1 _-11 Video camera 1 _-12 Camera control circuit 1 _-13 Video capture 1 _-14 Network interface 1 _-15 Main memory 1 _-16 CPU
1 _-17 Secondary storage device 1 _-18 Bus 1 _-19 Timer 1 _-21 Bit map display 1 _-22 CPU
1 _-23 main memory 1 _-24 network interface 1 _-25 mouse 1 _-26 secondary storage device 1 _-27 bus 11a camera 11b camera control unit 11c control right management unit 11d message transmission / reception unit 11e video transmission unit 12 network 13a message transmission / reception unit 13b Display unit 13c Operation input unit 13d Video transmission unit 502 Control right related request transmission button 503 Display window

Claims (4)

A camera control system capable of remotely controlling a camera connected to a camera server device from a plurality of camera client devices,
In each of the camera client devices,
A control right acquisition request issuing means for issuing a control right acquisition request of the camera;
A forward request issuing means for requesting the camera control right advance,
In the camera server device,
In response to the control right acquisition request issued by the control right acquisition request issuing means, control right management means for managing the control right acquisition request of the camera client device that has issued the control right acquisition request;
Control right deprivation means for depriving the control right of the camera client device that issued the deferral request to the deferral request issued by the deferral request issue means;
A camera control system comprising: a re-registration unit that re-registers the camera client device that has issued the advance request.   The camera client device further comprises detection means for detecting that the user has not used the client a priori after acquiring the control right of the camera, and automatically delays the control right acquired by the user. The camera control system according to claim 1, wherein: A camera control method capable of remotely controlling a camera connected to a camera server device from a plurality of camera client devices,
Issuing a control right acquisition request for issuing a control right acquisition request of the camera;
A forward request issuing step for requesting the camera control right forward;
A control right management step for managing a control right acquisition request of the camera client device that has issued the control right acquisition request in response to the control right acquisition request issued in the control right acquisition request issuing step;
In response to the advance request, a control right deprivation step of depriving the control right of the camera client device that issued the advance request;
And a re-registration step of re-registering the camera client device that has issued the advance request.   A program for causing a computer to execute each step of the camera control method according to claim 3.

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