Graphical input controller and method with rear screen image detection

  • US 5,483,261 A
  • Filed: 10/26/1993
  • Issued: 01/09/1996
  • Est. Priority Date: 02/14/1992
  • Status: Expired due to Term
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First Claim
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1. A method for providing graphical input signals from an input device for an interactive computer system using an opaque enclosure with multiple semi-transparent light-diffusing panels disposed to form outside surfaces of the enclosure and an imaging device mounted relative to the panels for imaging the panels, the method including the steps of:

  • touching an outside surface of one panel;

    imaging an inner surface of the panels with the imaging device;

    acquiring a background image of the panels before touching the one panel;

    p1 normalizing the image signal in response to the background image;

    providing an image signal in response to the image;

    determining the coordinates of the image of the touch on the panel; and

    providing signals responsive to the coordinates to the interactive computer system.

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