TWO-DIMENSIONAL DOT CODE AND ITS READER

摘要

PROBLEM TO BE SOLVED: To make accurately readable a two-dimensional dot code. SOLUTION: Timing marks 32L and 32R are printed on the left and right sides of the data marks 33 of a two-dimensional dot code in every row. The existence/absence of the data mark 33 is judged with the position on a straight line obtained by connecting the centers of the marks 32L and 32R at its left and right edges as a reference.