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Camera control system with restrain based on the number of clients having access
| Details |
Inventors: Suzuki, Kazuko; Kawai, Tomoaki; Tanaka, Koichiro;
Assignee: Canon Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Garber; Wendy R.
Assistant Examiner: Vu; Ngoc-Yen
Attorney, Agent or Firm: Robin, Blecker & Daley
A camera control system capable of controlling a video camera of a camera server apparatus according to a control command from clients is arranged not to accept requests for a right to control the video camera from any of clients when the number of clients receiving a video image picked up by the video camera exceeds a predetermined number. If the number of clients is less than the predetermined number, the camera control system, upon receipt of a request for the control right from any of clients, accepts the request to permit the client to control the video camera. |
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DETAILED DESCRIPTION OF THE INVENTION Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.
(First Embodiment) In accordance with a first embodiment of the invention, a control method of controlling a video camera is changed according to the number of clients (client apparatuses) which are receiving a video image from the video camera and displaying the video image.
More specifically, when only a few number of clients are receiving a video image from the video camera, the control right to control the video camera is serially given to the clients wishing to control the video camera, for example, one after another at intervals of a predetermined time.
When there are a great number of clients, the control right to control the video camera is not given to any of the clients, and the video camera is automatically operated to send a video image.
Further, when the camera control right is transferred from one client to another, a video image to be displayed in the client who has last had the control right is, if desired, displayed in the form of a still image which is a video image obtained immediately before the control right is transferred, without shifting to a video image obtained under the control of the client to which the control right is transferred.
FIG.
1 shows in a block diagram the arrangement of an image pickup system according to the first embodiment.
Referring to FIG.
1, the image pickup system includes a camera server apparatus 1-1 and client apparatuses (display operation terminals operable by users) 1-2, 1-3, 1-4, - - - , which are connected to a network 1-0.
The camera server apparatus 1-1 is arranged to capture a video signal from a video camera 1-11 and to distribute the video signal via the network 1-0 to the client apparatuses which are in access to the camera server apparatus 1-1.
The camera server apparatus 1-1 is further arranged to receive a camera control command via the network 1-0 from a client apparatus having the control right to control the video camera 1-11, and to control the video camera 1-11 according to the camera control command
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Processing Data 
