Method, apparatus, and system for controlling a camera, and a storage medium storing a program used with the method, apparatus and/or system

• US 6,611,285 B1
• Filed: 07/16/1997
• Issued: 08/26/2003
• Est. Priority Date: 07/22/1996
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Morita, Kenji
• Primary Examiner(s): Garber, Wendy R.
• Assistant Examiner(s): Tillery, Rashawn N.
• Application Number:
  US08/895,266
• Time in Patent Office: 2,232 Days
• Field of Search: H04/N.715, 348/15, 348/211, 348/213, 348/333, 348/334, 348/358, 348/240, 348/14.1, 348/211.99, 348/211.3, 348/211.1, 348/233.01, 348/233.02, 348/233.03, 348/357, 348/239
• US Class Current: 348/211.3
• CPC Class Codes: H04N 23/62 Control of parameters via user interfaces
• CPC Class Codes: H04N 23/633 for displaying additional information relating to control or operation of the camera
• CPC Class Codes: H04N 23/661 Transmitting camera control signals through networks, e.g. control via the Internet
• CPC Class Codes: H04N 23/695 Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects

Abstract

In a camera control system for remote-controlling a video camera, a range within which the viewing direction of the video camera can be changed and the current viewing direction are displayed on a screen. A desired viewing direction to which the camera should be tilted or panned can be designated by a scroll bar. In response to the operation of the scroll bar, the camera is rotated to the designated direction. An image taken via the camera, which now faces in the new direction, is displayed on the screen of a controller in an enabled state in which the controller can access the camera, wherein a button of the scroll bar displayed on the screen moves with the change in the viewing direction of the camera. The amount of change in the viewing direction in a tilting or panning operation is adjusted in accordance with the zooming ratio so that when the viewing direction is changed, an image of an object on the screen is shifted by the same amount regardless of whether the camera is set to a wide-angle or narrow-angle zooming condition.

Claims

1. A camera control system comprising:

a plurality of camera controllers each having the capability of controlling a pick-up direction of a video camera connected to said plurality of camera controllers via a network, each said camera controller including;

an input device adapted to receive input information about a change to be made in the pick-up direction of said video camera; and

a display device adapted to graphically display the same input information about a current pick-up direction of said video camera; and

a server including;

a control device adapted to control the pick-up direction of said video camera in accordance with the designation of the change in the pick-up direction of said video camera given by any of said plurality of camera controllers,

wherein, in the case where the input information includes a plurality of commands for the same movement operation, said control device controls the direction of said camera in accordance with the command which is the latest.

2. A camera control system according to claim 1, wherein said display device displays information about an allowed range within which the pick-up direction of said video camera can be at least one of tilted and panned.

3. A camera control system according to claim 1, wherein said display device displays information about an allowed range within which the pick-up direction of said video camera can be changed, and

wherein said control device sets the limits of said allowed range of the pick-up direction.

4. A camera control system according to claim 1, wherein said display device displays information about an allowed range within which the pick-up direction of said video camera can be changed, said information being represented by a scroll bar.

5. A camera control system according to claim 4, wherein said display device displays an index on said scroll bar to represent the current pick-up direction of said video camera.

6. A camera control system according to claim 5, wherein said input device inputs a change in the pick-up direction of said video camera by moving said index.

7. A computer-readable storage medium for storing programs executed by a server computer to change a pick-up direction of a video camera in accordance with designations given by any of a plurality of camera controllers connected to the server computer via a network, said programs including:

a program for controlling the pick-up direction of the video camera in accordance with a designation of a change in the state of the video camera, the designation being received via the network; and

a program for, in the case where the designations include a plurality of commands for the same movement operation, controlling the direction of the video camera in accordance with the command which is the latest.

8. A storage medium according to claim 7, further storing a program for causing the server computer to transmit information about a current pick-up direction of the video camera to the camera controller to which an image taken via the video camera is supplied.

9. A server for controlling a video camera in accordance with designations given by a plurality of clients, each of which displays information about a state of the video camera, via a network, said server comprising:

an input unit adapted to input the designations; and

a control unit adapted to control the video camera in accordance with the designation given by one of the plurality of clients, the designation being received via the network,

wherein, in the case where the designations include a plurality of commands for the same operation, said control unit controls the video camera in accordance with the command which is the latest.

10. A server according to claim 9, wherein the other clients are provided with an image taken by the video camera.

11. A server according to claim 9, further comprising an output unit for outputting, from said server, non-image data comprising the same information about a current state of the video camera, which is controlled by said control unit in accordance with the designation, not only to the client which has issued the designation of the change of the video camera but also to other clients coupled to the server, wherein said output unit outputs the non-image data including information about a current pickup direction of the video camera in accordance with the command which is the latest.

12. A server according to claim 9, further comprising an output unit for outputting, from said server, non-image data comprising the same information about a current state of the video camera, which is controlled by said control unit in accordance with the designation, not only to the client which has issued the designation of the change of the video camera but also to other clients coupled to the server, wherein said output unit outputs the non-image data including information about a current zoom state of the video camera in accordance with the command which is the latest.

13. A method of controlling a video camera in accordance with an instruction given by a client via a network, said method comprising the steps of:

inputting a designation given by a camera controller; and

controlling the video camera in accordance with the designation given by the camera controller,

wherein, in the case where the designation information includes a plurality of commands for the same operation, the camera controller controls the camera in accordance with the command which is the latest.

14. A method according to claim 13, wherein the other clients are provided with an image taken by the video camera.

15. A method according to claim 13, further comprising the step of outputting, from a server, non-image data comprising the same information about a current state of the video camera, which is controlled in said controlling step, not only to the client which has issued the designation of a change in a pick-up direction of the video camera, but also to other clients coupled to the server, wherein the non-image data includes information about a current pickup direction of the video camera.

16. A method according to claim 13, further comprising the step of outputting, from a server, non-image data comprising the same information about a current state of the video camera, which is controlled in said controlling step, not only to the client which has issued the designation of a change in a pick-up direction of the video camera, but also to other clients coupled to the server, wherein the non-image data includes information about a current zoom state of the video camera.