OPTICALLY READABLE OBJECT AND METHOD AND APPARATUS FOR PROCESSING THE SAME

摘要

PURPOSE: To perform optical read compactly with high information density by storing information inside a two-dimensional array provided with plural polygons arranged corresponding to a predetermined geometrical pattern and provided with at least two different optical characteristics. CONSTITUTION: The center of a label 30 is occupied by a capture target 35 composed of plural concentric rings and the label 30 is provided with 33 horizontal rows 'R' and 30 vertical columns 'C' of hexagons 20. The hexagons 20 are formed by a printing process for printing the hexagons 20 by the two or more optical characteristics, for instance colors for forming contrast. The colors for forming the contrast are turned to white 25, black 26 and gray 27. The level of the gray 20 is selected so as to bring the optical characteristics of the gray 20 almost to the center between the optical characteristics of the white 25 and the black 26 used for forming the label 30. The label is printed so as to make the y-y axial lines of the hexagons for forming a honey comb be parallel to the vertical side edges 32 and 34 of the label.