Method of decoding a two-dimensional code symbol mark

A method of decoding a two-dimensional code symbol mark an information area defined by an X-axis side indication line and a Y-axis side indication line for determining a reading range of the two-dimensional code symbol mark and reading a binary signal of the code symbol mark recorded in the information area, thereby decoding the code symbol mark, wherein the X-axis side indication line or the Y-axis side indication line of the information area, and the division marks recorded on the X-axis side indication line or the Y-axis side indication line are detected by a code reader said method comprising the steps of:

• (a) calculating intervals of the divisional marks at every point of the intervals dividing the detection marks up to an end part of the Y-axis side indication line or X-axis side indication line, by dividing a distance between them by a specified integer,
• (b) reading and digitally storing the binary signals of the code symbol mark, and
• (c) digitally decoding and processing the digitally stored code symbol mark recorded in each region formed in a square of which one side is a length defined by the intervals of the division marks or a division mark spacing divided by an integer value.