Patent ID: 7377449
Filing Date: 2008-05-27
Classification: G06K

Abstract:
1. A system for a two dimensional bar code having information units arranged in the form of a matrix for synchronous omni-directional information, characterized in that, comprising: vertical synchronous information units disposed at two opposing borders in said matrix, wherein optical characteristics of the neighboring units are different and the units at different borders constitute a pair of vertical synchronous information units; horizontal synchronous information units disposed at another two opposing borders of said matrix, wherein optical characteristics of the neighboring units are different and the units at different borders constitute a pair of horizontal synchronous information units; directing information units having a characteristic shape and/or optical characteristic for identifying a scanning direction and having a relative positional relationship with said vertical synchronous information units and horizontal synchronous information units; and coding information units inside said matrix, wherein the base of each unit is at or near the junction of the central line of a pair of the vertical synchronous information units and the central line of a pair of the horizontal synchronous information units.