Method of imaging coding pattern comprising tags with divided x and y coordinate data
First Claim
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1. A system for imaging a coding pattern disposed on a surface of a substrate, said system comprising:
- (A) said substrate, wherein said coding pattern comprises;
a plurality of contiguous tags, each tag comprising x-coordinate data and y-coordinate data, wherein a y-axis is nominally defined as north-south and an x-axis is nominally defined as east-west; and
a plurality of data elements contained in each tag, said x-coordinate data being represented by a respective set of data elements and said y-coordinate data being represented by a respective set of data elements, wherein;
said x-coordinate data has two replications within a respective tag, a first replication in a western half of said tag and a second replication in an eastern half of said tag; and
said y-coordinate data has two replications within a respective tag, a first replication in a northern half of said tag and a second replication in a southern half of said tag; and
(B) an optical reader comprising;
an image sensor for capturing an image of a portion of said coding pattern, said image sensor having a field-of-view of at least one tag diameter and less than two tag diameters; and
a processor configured for performing the steps of;
(i) sampling and decoding x-coordinate data and y-coordinate data within said captured image; and
(ii) determining a position of said pen.
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Abstract
A method of imaging a coding pattern disposed on a surface of a substrate. The method comprises the steps of: (a) operatively positioning an optical reader relative to the surface and capturing an image of a portion of the coding pattern; (b) sampling and decoding x-coordinate data and y-coordinate data contained in the imaged portion; and (c) determining a position of the pen. The imaged portion has a diameter of at least one tag diameter and less than two tag diameters. The x-coordinate data and y-coordinate are each replicated in the tag.
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Citations
10 Claims
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1. A system for imaging a coding pattern disposed on a surface of a substrate, said system comprising:
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(A) said substrate, wherein said coding pattern comprises; a plurality of contiguous tags, each tag comprising x-coordinate data and y-coordinate data, wherein a y-axis is nominally defined as north-south and an x-axis is nominally defined as east-west; and a plurality of data elements contained in each tag, said x-coordinate data being represented by a respective set of data elements and said y-coordinate data being represented by a respective set of data elements, wherein; said x-coordinate data has two replications within a respective tag, a first replication in a western half of said tag and a second replication in an eastern half of said tag; and said y-coordinate data has two replications within a respective tag, a first replication in a northern half of said tag and a second replication in a southern half of said tag; and (B) an optical reader comprising; an image sensor for capturing an image of a portion of said coding pattern, said image sensor having a field-of-view of at least one tag diameter and less than two tag diameters; and a processor configured for performing the steps of; (i) sampling and decoding x-coordinate data and y-coordinate data within said captured image; and (ii) determining a position of said pen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification