System for allowing handwritten interaction with a computer

Details System for allowing handwritten interaction with a computer System for allowing handwritten interaction with a computer

2010-05-04

2011-11-29

Tran, Douglas (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Communication

C358S003270

Reexamination Certificate

active

08068250

ABSTRACT:
A system for enabling user interaction is disclosed. The system includes a printer for printing print data on a form. The print data is indicative of a plurality of marks. Each mark has a predetermined pattern common to all marks and coded data. The predetermined pattern includes a rotationally invariant pattern. A sensing device is also included for sensing the marks when moved relative to the form, for using the rotationally invariant pattern to correct for perspective distortion of the marks, for decoding the coded data of the marks, and for generating indicating data indicative of movement of the sensing device relative to the form.

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