CODED DATA PATTERN HAVING REDUNDANTLY-ENCODED ORIENTATION

• US 20090236427A1
• Filed: 05/31/2009
• Published: 09/24/2009
• Est. Priority Date: 12/03/2002
• Status: Active Grant

• Current Assignee: Silverbrook Research Pty Limited
• Original Assignee: Silverbrook Research Pty Limited
• Inventors: Lapstun, Paul
• Granted Patent: US 7,984,858 B2
• Time in Patent Office: Days
• US Class Current: 235/491
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06K 19/06037 multi-dimensional coding
• CPC Class Codes: G06K 7/10871 randomly oriented data-fields, code-marks therefore, e.g. concentric circles-code

Abstract

A substrate having a coded data pattern disposed on a surface thereof. The coded data pattern comprises a plurality of target features defining a grid. The grid comprises a plurality of tags with neighboring tags sharing target features. Each tag comprises respective tag data encoded by a plurality of macrodot data elements contained in each tag. The macrodot data elements encode: a plurality of Reed-Solomon symbols, wherein a set of the symbols define a Reed-Solomon codeword; and an orientation of a layout of the tag data. The orientation is encoded a plurality of times in each tag.

Claims

8-1. The substrate of claim 1, wherein said tag data includes location data identifying a location of a respective tag with respect to a region of said surface.

9-2. The substrate of claim 8, wherein said location data is represented by at least one Reed-Solomon codeword.