Video camera apparatus with zoom control based on the pan or tilt operation

• US 5,479,203 A
• Filed: 04/12/1993
• Issued: 12/26/1995
• Est. Priority Date: 04/20/1992
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Kawai, Hisashi, Sato, Eiichi, Kojima, Masami
• Primary Examiner(s): GARBER, WENDY RAE
• Application Number:
  US08/046,073
• Time in Patent Office: 988 Days
• Field of Search: 348/15, 348/14, 348/207, 348/358, 348/16, 348/211, 348/373, 348/369
• US Class Current: 348/14.1
• 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
• CPC Class Codes: H04N 7/15 Conference systems
• CPC Class Codes: H04N 7/183 for receiving images from a single remote source

Abstract

A video camera apparatus for a video conference is arranged to detect the zoom level of a zoom lens by a zoom level detecting circuit and to control a motor control circuit according to the result of detection in such a way as to lower the speed of a panning or tilting operation on a video camera accordingly as the position of the zoom lens shifts from a wide-angle position to a telephoto position. In panning or tilting the video camera in a zoom-in state, this arrangement makes the panning or tilting speed lower than the speed of panning or tilting performed in a zoom-back state, so that the movement of objects on a picture displayed on a monitor can be effectively moderated to make the details of the display easily discernible without any unpleasant impression. The arrangement thus facilitates the operation on the video camera.

Claims

1. A video camera apparatus comprising:

a) a video camera having a zoom lens;

b) a support base arranged to carry said video camera and to permit at least a panning operation or a tilting operation on said video camera;

c) driving means for driving said support base to perform the panning operation or the tilting operation; and

d) control means for varying a zoom ratio of said zoom lens according to the panning operation or the tilting operation of said support base.

2. An apparatus according to claim 1, further comprising zoom ratio detecting means for detecting the zoom ratio of said zoom lens.

3. An apparatus according to claim 1, further comprising speed detecting means for detecting the speed of the panning operation or the tilting operation of said support base.

4. An apparatus according to claim 1, further comprising first detecting means for detecting the zoom ratio of said zoom lens, storage means for storing a result of detection made by said first detecting means, and second detecting means for detecting the speed of the panning operation or the tilting operation of said support base.

5. An apparatus according to claim 4, wherein said control means is arranged to vary the zoom ratio of said zoom lens according to a zoom ratio which is obtained before the panning operation or the tilting operation of said support base and which is stored in said storage means and according to a result of detection made by said second detecting means.

6. An apparatus according to claim 1 or 5, further comprising a monitor arranged to display image information picked up by said video camera.

7. An apparatus according to claim 6, further comprising pictorial frame setting means arranged to permit a pictorial frame corresponding to the zoom ratio to be displayed by said monitor together with the picked-up image information.

8. An apparatus according to claim 1, wherein said support base has a mirror part which is rotatably carried, said mirror part being arranged to reflect an object image and to have the reflected object image incident on said video camera.

9. An apparatus according to claim 8, further comprising image processing means arranged to invert an image picked up by said video camera with regard to right and left.

10. A video camera apparatus comprising:

a) a video camera having a zoom lens;

b) a support base arranged to carry said video camera and to permit at least a panning operation or a tilting operation on said video camera;

c) driving means for driving said support base to perform the panning operation or the tilting operation; and

d) control means for varying a zoom ratio of said zoom lens according to the speed of the panning operation or the speed of the tilting operation of said support base.

11. An apparatus according to claim 10, further comprising zoom ratio detecting means for detecting the zoom ratio of said zoom lens.

12. An apparatus according to claim 10, further comprising speed detecting means for detecting the speed of the panning operation or the tilting operation of said support base.

13. An apparatus according to claim 10, further comprising first detecting means for detecting the zoom ratio of said zoom lens, storage means for storing a result of detection made by said first detecting means, and second detecting means for detecting the speed of the panning operation or the tilting operation of said support base.

14. An apparatus according to claim 13, wherein said control means is arranged to vary the zoom ratio of said zoom lens according to a zoom ratio which is obtained before the panning operation or the tilting operation of said support base and which is stored in said storage means and according to a result of detection made by said second detecting means.

15. An apparatus according to claim 10 or 14, further comprising a monitor arranged to display image information picked up by said video camera.

16. An apparatus according to claim 15, further comprising pictorial frame setting means arranged to permit a pictorial frame corresponding to the zoom ratio to be displayed by said monitor together with the picked-up image information.