The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 10, 1999
Filed:
Sep. 12, 1996
Keith Waters, West Newton, MA (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
In a touch activated computer system, a display terminal displays an image on a screen of the terminal. The image includes one or more visual option buttons arranged in a predetermined pattern. Each button corresponds to a specific application program which can be executed by the system. A camera has a lens oriented to capture frames representing a scene in front of the screen. Each frame includes a plurality of regularized pixel values. The system includes an image registration subsystem for comparing the pixel values of successive frames. A particular application is selected for execution when the pixel values corresponding to that portion of the scene directly in front of a particular button differ in successive frames more than a predetermined threshold value.