Coding pattern with data elements encoding by pulse-position modulation
First Claim
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1. A substrate having a coding pattern disposed on a surface thereof, said coding pattern comprising:
- a plurality of target elements defining a target grid, said target grid comprising a plurality of cells, wherein each cell has a target element positioned at each corner thereof and neighboring cells share target elements;
a plurality of data elements contained in each cell; and
a plurality of tags, each tag being defined by a plurality of contiguous cells, each tag comprising respective local tag data encoded by a respective set of said data elements,wherein said data elements encode data values by pulse position modulation.
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Abstract
A substrate having a coding pattern disposed on a surface thereof. The coding pattern comprises a plurality of target elements defining a target grid. The target grid comprises a plurality of cells, wherein neighboring cells share target elements. A plurality of data elements are contained in each cell. Tags are defined by a plurality of contiguous cells and each tag comprises respective local tag data encoded by a respective set of the data elements. The data elements encode data values by pulse position modulation, which facilitates low-pass filtering during image processing.
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Citations
20 Claims
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1. A substrate having a coding pattern disposed on a surface thereof, said coding pattern comprising:
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a plurality of target elements defining a target grid, said target grid comprising a plurality of cells, wherein each cell has a target element positioned at each corner thereof and neighboring cells share target elements; a plurality of data elements contained in each cell; and a plurality of tags, each tag being defined by a plurality of contiguous cells, each tag comprising respective local tag data encoded by a respective set of said data elements, wherein said data elements encode data values by pulse position modulation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification