Information reading system

摘要

A code comprises data patterns recorded according to a piece of information and markers arranged at predetermined respective positions relative to the data, patterns and used to determine the position for reading each of the data patterns. The data patterns and the markers are optically readably recorded in different modes. An image memory section stores the optically readable image of the code picked up by an imaging section. An attribute determining section determines the attribute of the image stored in the image memory section on the basis of a unit of a plurality of adjacently arranged pixels selected as a function of the size of the markers and a marker detecting section detects the markers on the basis of the attribute determined by the attribute determining section. A data reading section determines the position for reading the data pattern on the basis of the detected positions of the markers and actually read the data.