Decoding method of two-dimensional code symbol mark

Claim 2

A decoding method of two-dimensional symbol mark of claim 1, wherein the X-axis side indication line(4), the Y-axis side indication line (5), the division marks (7)recorded on the X-axis side indication line (4), and Y-axis side indication line(5), and the corner marks(6)at diagonal positions of intersections with the X-axis side indication line(4) and Y-axis side indication line(5)of which the code symbol mark(2)is recorded in the information area(8) are individually detected by the code reader (3), the code marks(9) of binary signals recorded in the information area(8)are sequentially read by the code reader(3)up to the corner marks(6)of the diagonal positions of the intersections with the X-axis side indication line(4)and Y-axis side indication line(5), at every interval of dividing the interval of the detected division marks(7) by a specified integer value, and the crossing angle is calculated on the basis of the detection of the X-axis side indication line(4)and Y-axis side indication line(5), while the crossing angle of the X-axis side indication line(4)with the straight line linking the end part of the X-axis side indication line(4) and the corner mark(6), and the crossing angle of the Y-axis side indication line(5)with the straight line linking the end part of the Y-axis side indication line(5)and the corner mark(6)are calculated, and, on the basis of these slant angles, the straight lines passing through the division marks(7)of the X-axis side indication line(4) and the Y-axis side indication line(5), or the points of segmenting the interval of the division marks(7)into a specific number are respectively calculated by the linear interpolation method, and the region of each square formed by crossing of these straight lines is calculated, and the code symbol mark(2)recorded in the information area(8) is decoded.

Claim 3

A decoding method of two-dimensional code symbol mark of claim 1 or 2, wherein the code reader(3)is first scanned at rough reading precision to detect the X-axis side indication line(4), the Y-axis side indication line(5), and the corner marks(6) at the diagonal positions of the intersections with the X-axis side indication line(4) and Y-axis side indication line(5)of the information area(8) recording the code symbol mark(2), and the code reader(3)is scanned at dense reading precision to detect the X-axis side indication line(4) and division marks(7)on X-axis side indication line(4), the interval of division marks(7) or/and Y-axis side indication line(5)and division marks(7)on Y-axis side indication line(5), and interval of division marks(7), thereby decoding the code symbol mark(2)recorded in the information area(8) specified by the X-axis side indication line(4) and Y-axis side indication line(5).

Claim 4

A decoding method of two-dimensional code symbol mark of any one of claims 1 to 3, wherein the code reader(3) is a line sensor or laser scanner of one-dimensional charged coupled device (CCD).

Claim 5

A decoding method of two-dimensional code symbol mark of claim 3, wherein reading within information region by the code reader(3) is done at every interval of the middle point of division mark(7), or at every interval of the middle point between division marks(7).

Claim 6

A decoding method of two-dimensional code symbol mark of claim 4, wherein the code reader(3)of one-dimensional laser scanner detects any one of the X-axis side indication line(4), the division mark(7) on the X-axis side indication line(4), the Y-axis side indication line(5)and the division mark(7)of the Y-axis side indication line(5) of the information area(8)recording the code symbol mark(2), and the polygon mirror(3A)or the like of the code reader(3)of the laser scanner is revolved by 90 degrees, the indication line of the remaining side of the above information area(8)and its division marks(7) are detected by other one-dimensional laser scanner installed together in the orthogonal direction thereof, and the code symbol mark(2)recorded in the information area(8)specified by the X-axis side indication line(4)and Y-axis side indication line(5) is decoded.

Claim 7

A decoding method of two-dimensional code symbol mark of claim 4 or 5, wherein each square of which one side is the interval of division marks(7) determines the region of the specified range centered around the middle point of division mark(7)or/and extended point from the middle point between division marks(7), thereby processing the code mark(9)recorded in this region.

Claim 8

A decoding method of two-dimensional code symbol mark of claim 4 or 5, wherein each square of which one side is the interval of division mark(7)is the region having the point extended from each end part side of division mark(7) as a corner part, and the code mark(9)recorded in this region is processed.

Claim 9

A decoding method of two-dimensional code symbol mark of claim 4 or 5, wherein the information area(8) is detected by reading the X-axis side indication line(4), Y-axis side indication line(5), and the asymmetrical corner mark(6)at the diagonal position of their intersection.

Claim 10

A decoding method of two-dimensional code symbol mark of claim 4 or 5, wherein the division mark(7) is as wide as the interval between division marks(7), and the interval of division mark(7)is set at the length of the interval between division marks(7).

Claim 11

A decoding method of two-dimensional code symbol mark of claim 1 or 2, wherein the code symbol mark(2)is written on a magnetic material.