Camera control system having list of camera names updated in accordance with frequency of use and other ease of use features

• US 6,122,005 A
• Filed: 04/10/1996
• Issued: 09/19/2000
• Est. Priority Date: 04/14/1995
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Kato, Eiji, Sasaki, Akitomo
• Primary Examiner(s): Le, Vu
• Application Number:
  US08/630,132
• Time in Patent Office: 1,623 Days
• Field of Search: 348/211, 348/213, 348/15, 348/12, 348/13, 348/14, 348/143, 348/153, 348/159
• US Class Current: 348/211.3
• CPC Class Codes: H04N 23/632 for displaying or modifying preview images prior to image capturing, e.g. variety of image resolutions or capturing parameters
• CPC Class Codes: H04N 23/661 Transmitting camera control signals through networks, e.g. control via the Internet
• CPC Class Codes: H04N 7/15 Conference systems

Abstract

The name of one camera to be controlled is displayed in a camera-name display field of a camera control interface displayed on a screen. When a prescribed operation is performed, the names of cameras capable of being controlled are sorted in accordance with the degrees of frequency of use thereof so that the camera names are displayed in a list in order of decreasing frequency of use. By selecting one of the displayed camera names, the camera is selected as the camera to be controlled.

Claims

1. A camera control system having at least one camera unit connected to a predetermined line, and at least one control unit for controlling said camera unit via said line, said camera unit comprising:

a camera capable of being panned, tilted and zoomed; and

management means for managing said camera and controlling said camera in accordance with a control command from said control unit; and

said control unit comprising;

display means for displaying a user interface which includes symbol buttons for controlling said camera unit;

memory means for storing camera names of connectable cameras and address information for specifying each camera unit on the line;

accumulating means for accumulating, for each camera, time during which a camera is controlled, so as to obtain the total time period of controlling each camera in the past;

sorting means for deciding an order of displaying of the camera names on a list based upon a length of time period accumulated by said accumulating means;

list display means for displaying a list of the camera names that is in accordance with the order of display decided by said sorting means;

detecting means for detecting whether any camera name in the displayed camera list has been designated; and

sending means for converting input information, which has been designated on the displayed user interface, to information having a predetermined format and sending the information having the predetermined format to a camera unit designated by address information corresponding to a camera name detected by said detecting means.

2. The system according to claim 1, wherein said counting means comprises:

first arithmetic means for calculating frequency of use by calculating number of times a selection is made from the camera list;

second arithmetic means for calculating frequency of use by calculating selection time of a camera under control;

third arithmetic means for calculating frequency of use by calculating number of times a camera under control is controlled; and

designating means for designating any of said first, second and third arithmetic means.

3. The system according to claim 1, further comprising a prescribed non-volatile storage device for storing camera names of connectable cameras, address information for specifying each camera unit on the line, and frequency of use of each camera unit counted by said counting means.

4. The system according to claim 1, wherein said management means of the camera unit includes means which, in a case where said camera is driven in accordance with a control command from said control unit, sends status information indicative of status of said camera to the control unit which issued said control command.

5. The system according to claim 4, wherein said control unit comprises:

first area display means for displaying a first area representing a range over which photography is possible by a camera unit under control;

receiving means for receiving status information from said camera unit under control after information designated on said user interface has been sent to said camera unit under control; and

second area display means which, in accordance with the received status information, displays a second area, which is indicative of present photographic position and range, within said first area displayed by said first area display means.

6. The system according to claim 1, wherein said management means of the camera unit comprises:

determination means which, in a case where a connect request command has been received from said control unit, is for determining whether the currently prevailing camera has been connected to another control unit; and

means for sending the control unit which issued said connect request command information indicative of connect disable if said determination means determines that the currently prevailing camera has been connected to another control unit, and control information indicative of connect enable if said determination means determines that the currently prevailing camera has not been connected to another control unit.

7. A camera control system having one or more camera management units for connecting and managing a camera capable of being at least one of panned, tilted and zoomed via two communication channels, one being an image transmission channel for transferring a sensed image, the other being a control channel for controlling a camera, and a controller for controlling the camera connected to said camera management unit, wherein said controller comprises:

designating means for designating a desired camera management unit, said designating means including;

determination means for determining whether or not a camera management unit for which the image transferring channel and the control channel have already been established exists; and

issuing means, if said determination means determines that a camera management unit for which the image transferring channel and the control channel have already been established exists and this camera management unit differs from the designated camera management unit, for issuing a disconnection of only the control channel to said camera management unit for which the image transferring channel and the control channel have already been established, while maintaining the connection of the image transmission channel; and

means for establishing connection to the camera management unit designated by said designating means.

8. The system according to claim 7, wherein said camera management unit comprises means which, in accordance with a control command from said controller, is for controlling panning, tilting and zooming of a connected camera as well as connection and disconnection of the image transferring channel and the control channel, and sending status information indicative of status of said camera to said controller.

9. The system according to claim 7, wherein said controller comprises:

first display means for displaying a maximum visual-field area over which photography is possible by panning, tilting and zooming of the camera associated with the camera management unit whose connection of the control channel has been established; and

second display means for displaying a photographic area, which is based upon photographic position/size of said camera, in said maximum visual-field area.

10. The system according to claim 9, wherein said controller comprises:

means for issuing a request command, which requests camera status information, to said camera management unit whose connection of the control channel has been established, and receiving the status information from said camera management unit; and

updating means for updating said first and second display means based upon the status information received.

11. The system according to claim 7, wherein after control of a camera has been completed, a connection of the control channel between the camera controller and the camera management unit having the camera under control is disconnected in response to a predetermined operation.

12. The system according to claim 7, wherein if camera control has not been performed for a predetermined period of time, the connection of the control channel is disconnected automatically.

13. The system according to claim 7, wherein said camera management unit has means for detecting elapse of a predetermined period of time and disconnecting a connection.

14. The system according to claim 7, wherein said controller has means for detecting elapse of a predetermined period of time and disconnecting a connection.

15. The system according to claim 7, wherein said camera management unit translates a control command from said controller and converts the command to a command suited to the camera connected.

16. A method of controlling a camera control system for controlling a plurality of cameras, comprising the steps of:

displaying a list of names of said plurality of cameras;

accumulating, for each camera, time during which the camera is controlled so as to obtain the total time period of controlling each camera in the past;

changing the camera list in an order in accordance with a length of the total time period accumulated in said accumulating step; and

selecting a camera to be controlled from the camera list which has been changed in said changing step so as to display the camera names in the order of length of time period.

17. A method of controlling a camera control system having one or more camera management units for connecting and managing a camera capable of being at least one of panned, tilted and zoomed via two communication channels, one being an image transmission channel for transferring a sensed image, the other being a control channel for controlling a camera, and a controller for controlling the camera connected to said camera management unit, said method comprising the steps of:

designating a desired camera management unit;

determining whether or not a camera management unit for which the image transmission channel and control channel have already been established exists;

disconnecting only the control channel for the camera management unit having the established image transferring channel and control communication channel while maintaining the connection of the image transmission channel; and

establishing connection to the camera management unit designated in said designating step.

18. A camera control system for controlling a camera capable of being at least one of panned, tilted and zoomed via a network, comprising:

operating means for operating the camera;

acquisition means for acquiring status information of the camera operated by said operating means;

memory means for storing said status information of the camera at the time when the operation of said operating means is completed; and

issuing means for issuing a command to the camera so as to restore the status of the camera to the status corresponding to the status information stored in said memory means when re-connecting the camera to operate the camera.

19. The system according to claim 18, wherein said memory means is provided in an operating terminal.

20. The system according to claim 18, wherein said memory means is provided in a terminal having the camera.

21. A method for controlling a camera control system for controlling a camera capable of being at least one of panned, tilted and zoomed via a network, comprising the steps of:

operating the camera;

acquiring status information of the camera operated in said operating step;

storing said status information of the camera at the time when the operation in said operating step is completed; and

issuing a command to the camera so as to restore the status of the camera to the status corresponding to the status information stored in said storing step when re-connecting the camera to operate the camera.

22. The method of claim 21, wherein said storing step is performed in an operating terminal.

23. The method of claim 21, wherein said storing step is performed in a terminal having the camera.