Method of imaging coding pattern comprising replicated and non-replicated coordinate data
First Claim
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 square tags of length l, 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 comprises a replicated part and a non-replicated part, said replicated part having a first replication in a western half of said tag and a second replication in an eastern half of said tag, and said non-replicated part being represented in a central column of said tag, said central column dividing said western half from said eastern half;
said y-coordinate data comprises a replicated part and a non-replicated part, said replicated part having a first replication in a northern half of said tag and a second replication in a southern half of said tag, and said non-replicated part being represented in a central row of said tag, said central row dividing said northern half from said southern half; and
said central column and said central row each have a width q; 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 (l+q)√
2 and less than (2l)√
2; and
a processor configured for performing the steps of;
(i) sampling and decoding x-coordinate data and y-coordinate data contained in an imaged portion; and
(ii) determining a position of said optical reader.
1 Assignment
0 Petitions
Accused Products
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 within the imaged portion; and (c) determining a position of the pen. The coding is specially adapted to minimize space occupied by coordinate data. The imaged portion has a diameter of at least (l+q)√2 and less than (2 l)√2, where l is the length of a square tag in the coding pattern and q is the width of a central column or row of data within each tag.
-
Citations
10 Claims
-
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 square tags of length l, 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 comprises a replicated part and a non-replicated part, said replicated part having a first replication in a western half of said tag and a second replication in an eastern half of said tag, and said non-replicated part being represented in a central column of said tag, said central column dividing said western half from said eastern half; said y-coordinate data comprises a replicated part and a non-replicated part, said replicated part having a first replication in a northern half of said tag and a second replication in a southern half of said tag, and said non-replicated part being represented in a central row of said tag, said central row dividing said northern half from said southern half; and said central column and said central row each have a width q; 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 (l+q)√
2 and less than (2l)√
2; anda processor configured for performing the steps of; (i) sampling and decoding x-coordinate data and y-coordinate data contained in an imaged portion; and (ii) determining a position of said optical reader. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification