| 摘要 |
<P>PROBLEM TO BE SOLVED: To highly densely embed bit information in a two-dimensional code for detecting the two-dimensional code from not only a direction which is almost counter to the two-dimensional code but also an arbitrary direction. <P>SOLUTION: This two-dimensional code is provided with the outside shape of a square which can be identified from a background based on brightness or color, wherein the inside of the two-dimensional code is divided into specific sizes by setting a fixed interval in the outer periphery of its inside, and information is expressed according to the brightness or color of each of the divided regions. In this case, the respective regions obtained by dividing the inside of the two-dimensional code are made adjacent to each other so that a hexagonal can be configured. <P>COPYRIGHT: (C)2007,JPO&INPIT |
