Two dimensional bar code having increased accuracy
First Claim
1. A matrix code symbol comprising:
- a two-dimensional matrix containing dark and light square data modules, wherein data is encoded based on the absolute position of the dark modules within the matrix;
a finder pattern of two solid bars and two bars of alternating dark and light square data modules on the perimeter of the matrix for indicating both orientation and printing density of the symbol, wherein all of the dark and light modules of the matrix are the same dimension, and wherein the two solid bars are on one pair of adjacent sides of the perimeter and the two bars of alternating dark and light data modules are on the opposite pair of adjacent sides of the perimeter;
an inner bar adjacent each of the finder pattern bars of alternating dark and light data modules; and
at least one outer bar adjacent each inner bar,wherein the inner and outer bars each have a width equal to the square data modules.
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Accused Products
Abstract
A two-dimensional matrix code containing dark and light square data modules, and a finder pattern of two bars of alternating dark and light square data modules on the perimeter of the symbol for indicating both orientation and printing density of the symbol, wherein all of the data modules are the same dimension and data is encoded based on the absolute position of the dark modules within the matrix. In a first embodiment inner and outer solid bars are provided along the base and right-hand side of the matrix code symbol, the inner and outer solid bars each having a width equal to the square data modules, the inner solid bar being light and the outer solid bar being dark. In a second embodiment, an inner solid bar and an outer encoding bar are provided along the base and right-hand side of the matrix code symbol.
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Citations
9 Claims
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1. A matrix code symbol comprising:
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a two-dimensional matrix containing dark and light square data modules, wherein data is encoded based on the absolute position of the dark modules within the matrix; a finder pattern of two solid bars and two bars of alternating dark and light square data modules on the perimeter of the matrix for indicating both orientation and printing density of the symbol, wherein all of the dark and light modules of the matrix are the same dimension, and wherein the two solid bars are on one pair of adjacent sides of the perimeter and the two bars of alternating dark and light data modules are on the opposite pair of adjacent sides of the perimeter; an inner bar adjacent each of the finder pattern bars of alternating dark and light data modules; and at least one outer bar adjacent each inner bar, wherein the inner and outer bars each have a width equal to the square data modules. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification