Method and apparatus for entering coordinates into a computer

Details Method and apparatus for entering coordinates into a computer Method and apparatus for entering coordinates into a computer

1992-05-05

1995-02-28

Brier, Jeffery

Television

Special applications

Manufacturing

348 92, 348141, 345157, H04N 718

Patent

active

053941837

ABSTRACT:
A method and apparatus to input two dimensional points in space into a computer. Such points in space reside within the field of view of a video camera, which is suitably connected to a computer. The operator aims a focus of light at the point whose coordinates are desired and depresses a trigger button mounted proximate to the light source. The trigger actuation signals the computer to capture a frame of video information representing the field of view of the camera, and with appropriate software, identifies the picture element within that frame that has the brightest value by comparison with the field of view without the focus of light. This picture element will be the one associated with the point within the field of view upon which the spot of light impinged at the time the trigger button was depressed. The actual digital coordinates of the point are identified and then calculated based upon a previously established relationship between the video frame and the camera field of view.

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