| US 7,503,493 B2 | ||
| Method and system for digitizing freehand graphics with user-selected properties | ||
| Kia Silverbrook, Balmain (Australia); Paul Lapstun, Balmain (Australia); and Jacqueline Anne Lapstun, Balmain (Australia) | ||
| Assigned to Silverbrook Research Pty Ltd, Balmain, New South Wales (Australia) | ||
| Filed on Nov. 25, 2005, as Appl. No. 11/286,334. | ||
| Application 11/286334 is a continuation of application No. 11/159196, filed on Jun. 23, 2005, granted, now 7,322,524. | ||
| Application 11/159196 is a continuation of application No. 09/693515, filed on Oct. 20, 2000, granted, now 6,965,454. | ||
| Claims priority of application No. PQ3632 (AU), filed on Oct. 25, 1999. | ||
| Prior Publication US 2006/0072828 A1, Apr. 06, 2006 | ||
| Int. Cl. G06K 7/10 (2006.01) | ||
| U.S. Cl. 235—454 [235/462.45; 235/472.01] | 26 Claims |
| 1. A system for digitizing a freehand graphic, the system comprising:
a base including:
a surface;
a position-coding pattern printed on the surface and detectable by an optical sensor;
a first area of the surface; and
a second area of the surface;
a drawing device having an optical sensor functional to detect a position in the position-coding pattern; and
a microprocessor adapted to perform the following actions:
determining if the position detected by the optical sensor is in the first area or the second area;
if the position is in the first area of the surface, then interpreting the position as a point in the freehand graphic; and
if the position is in the second area of the surface, then interpreting the position as a selection of a property for the
freehand graphic.
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