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United States Patent | 7,895,107 |
Lapstun , et al. | February 22, 2011 |
A method of interacting with a printed form. The method includes the steps of: maintaining a page description corresponding to a printed form; receiving, indicating data from an optically imaging pen operated by the user, the indicating data being indicative of the identity of the form and of a position of a nib of the pen relative to the form; retrieving the page description using the identity of the form; and identifying an interaction with the form using the position of the nib and the retrieved page description. The position of the nib is determined by inferring a perspective transform from perspective-distorted corners of a tag of known size when sensing the coded data and using the perspective transform together with a known geometry of pen optics to compute the position of the nib.
Inventors: | Lapstun; Paul (Balmain, AU), Lapstun; Jacqueline Anne (Balmain, AU), Silverbrook; Kia (Balmain, AU) |
Assignee: |
Silverbrook Research Pty Ltd
(Balmain, New South Wales,
AU)
|
Appl. No.: | 12/765,749 |
Filed: | April 22, 2010 |
Application Number | Filing Date | Patent Number | Issue Date | ||
09575181 | May., 2000 | 7707082 | |||
May 25, 1999 [AU] | PQ0559 | |||
Jun 30, 1999 [AU] | PQ1312 | |||
Jun 30, 1999 [AU] | PQ1313 | |||
Current U.S. Class: | 705/35 ; 705/39; 705/40 |
Current International Class: | G06Q 40/00 (20060101) |
Field of Search: | 705/33,34,35,38,39,21,23,40,53,56,58,62,67,72,73,75,79 |
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