Browse Prior Art Database

Direct Control of a Video Camera on a Video Monitoring Screen

IP.com Disclosure Number: IPCOM000112280D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Ando, F: AUTHOR [+3]

Abstract

Disclosed is a user interface system for controlling a video camera on a video monitoring screen of a computer display, instead of through an operation-panel-like user interface. A user can control the direction of a video camera (pan and tilt) by specifying a desired frame area or by pointing to a desired center position with a pointing device (such as a mouse) on a video monitoring screen. At the same time, the user can zoom in or out by specifying a smaller or larger rectangle as a new frame. This user interface system is based on two existing technologies:

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Direct Control of a Video Camera on a Video Monitoring Screen

      Disclosed is a user interface system for controlling a video
camera on a video monitoring screen of a computer display, instead of
through an operation-panel-like user interface.  A user can control
the direction of a video camera (pan and tilt) by specifying a
desired frame area or by pointing to a desired center position with a
pointing device (such as a mouse) on a video monitoring screen.  At
the same time, the user can zoom in or out by specifying a smaller or
larger rectangle as a new frame.  This user interface system is based
on two existing technologies:

1.  Display of video signals in a single rectangular area (window) of
a computer screen.

2.  Electrical control of a video camera controller.

      The Figures show examples of operations allowed by the
disclosed user interface.  Fig. 1 shows the operation for changing
the direction of the video camera (pan/tilt).  When the user clicks
on a new center position in the video window, the direction of the
camera changes to hold that position as the center of the frame.
Figs.  2 and 3 show the zoom-in and zoom-out operations.  By
specifying a smaller or larger rectangle than the current video
window area, the user can change the zooming ratio to fit the new
frame to the specified area.

      The following formulas show the calculations necessary for
obtaining the actual parameters for the video camera controller from
the user's op...