CONTROLLING MOVEMENT OF VIDEO SURVEILLANCE CAMERAS

摘要

A method for moving and controlling a video surveillance camera comprises th e steps of supporting a video surveillance camera (26) for tilting movement about mutually perpendicular axes; transforming tilt and pan commands into angular movement commands; rotating the camera about the mutually perpendicular axes responsive to the angular movement commands, the video camera having a substantially hemispherical field of view as the camera is pivoted about the axes and the video camera generating a picture which is inverted relative to true horizontal over a portion of the field of view; automatically rotating the picture to substantially right-side-up orientatio n whenever necessary, whereby a right-side-up picture is provided throughout t he field of view without continuous panning rotation of the video camera. In a corresponding system, a servo mechanism tilts the video camera, a motion controller transforms the tilt and pan commands and a video signal processor rotates the picture.