Patent ID: 7819330

Claim:
A method for recognizing a graphical indicator, comprising the steps of: providing a graphical indicator on a surface of an object to represent index information, wherein the graphical indicator comprises: a content part spread with a plurality of first micro-units, the content part being divided into a plurality of first state zones and each first state zone being spread with one first micro-unit, wherein each first micro-unit is shifted relative to the center of a first state zone in a direction not perpendicular to a connecting line of the centers of two adjacent first state zones to represent different candidate states; and a header part spread with a plurality of second micro-units and divided into a plurality of second state zones, wherein each second state zone is spread with one second micro-unit not used to carry information, the first state zones and the second state zones are two complementary parts of an array of N rows (N≧2) and M columns (M≧2), the number of the micro-units is N×M, the second state zones of the header part are arranged into an outermost row and an outermost column of the array to define the distribution area of the content part, at least one second micro-unit is shifted relative to the center of a second state zone in a direction perpendicular to a connecting line of the centers of two adjacent second state zones to provide header information, and each of the rest second micro-units is provided in the center of a second state zone; and capturing an enlarged image from the surface of the object to fetch the index information of the graphical indicator.