Two-dimensional image code, the method for identifying a region containing the coding region, a program for specifying a region including the coding region, identify a device region containing the coding region

摘要

PROBLEM TO BE SOLVED: To specify an area including a code area without identifying code contents.;SOLUTION: A two-dimensional image code comprises: a code area 10a having a code in which a data cell is expressed by two colors, namely a high brightness color and a low brightness color of which brightness is lower than that of the high brightness color; and a high brightness area 10b provided around the code area and consisting of a high brightness color of which brightness is higher than that of the low brightness color. The code area and the high brightness area form a QR code (R), the code area has a specific shape area 10d, and the specific shape area is larger than the minimum unit of the data cell. The average value of brightness of the specific shape area is higher than the average value of brightness of an area except for the specific shape area in the code area at least by 10%, or the average value of brightness of the specific shape area is lower than the average value of brightness of an area except for the specific shape area in the code area at least by 10%.;COPYRIGHT: (C)2013,JPO&INPIT