Machine readable binary codes
First Claim
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1. A machine readable binary code comprising a two dimensional matrix of data cells, said matrix having a plurality of sides, said binary code being arranged so that:
- a sub-array of data cells is provided in the region of the point of intersection of each pair of adjacent sides;
each of which sub-arrays comprises a first group of data cells and a second group of data cells;
the configuration of which first group of data cells is the same for each sub-array;
each of which first groups of data cells comprises a distinctive pattern of "on" data cells which is recognisable by a reading device as denoting the presence of a corner;
the configuration of which second group of data cells is different for each sub-array;
each of which second groups of data cells is located between the corresponding said first group and the rest of the matrix and is recognizable by a reading device as uniquely identifying each corner of the matrix from the other corners.
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Abstract
A machine readable binary code includes a two-dimensional matrix of data cells (6) having a plurality of sides. A unique sub-array of data cells (1, 2, 3, 4) is positioned at the point of intersection of each pair of adjacent sides to define and uniquely identify each corner of the matrix.
67 Citations
9 Claims
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1. A machine readable binary code comprising a two dimensional matrix of data cells, said matrix having a plurality of sides, said binary code being arranged so that:
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a sub-array of data cells is provided in the region of the point of intersection of each pair of adjacent sides; each of which sub-arrays comprises a first group of data cells and a second group of data cells; the configuration of which first group of data cells is the same for each sub-array; each of which first groups of data cells comprises a distinctive pattern of "on" data cells which is recognisable by a reading device as denoting the presence of a corner; the configuration of which second group of data cells is different for each sub-array; each of which second groups of data cells is located between the corresponding said first group and the rest of the matrix and is recognizable by a reading device as uniquely identifying each corner of the matrix from the other corners. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification