JP4846945B2 - 2D code - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention surrounds the periphery of a two-dimensional matrix with a broken line, and places a heading line capable of acquiring position information and density information of the matrix on the inner side of the adjacent two sides of the broken line surrounding the periphery and on the outer side of the opposite two sides. The present invention relates to a two-dimensional code in which the symbol position and information density are determined by deployment, and the data area of the matrix is configured only by data, thereby enabling efficient data compression and error correction functions.
[0002]
[Prior art]
Conventionally, as a two-dimensional code, for example, as described in Japanese Patent Application Laid-Open No. 7-168902, a two-dimensional data element is divided into a plurality of parts to form a two-dimensional array. A two-dimensional code for displaying density information and a shape in which a position determination symbol is embedded in a two-dimensional matrix as described in Japanese Patent Laid-Open No. 7-254037, and the symbol is a device such as a CCD image scanner. It has been known that attempts have been made to ensure reading speed and accuracy when reading with.
[0003]
These attempts have been devised based on the performance of conventional one-dimensional bar code readers, with an emphasis on position determination and acquisition of density information, and emphasis on increasing information density per limited code area. Was not placed.
[0004]
However, due to recent technological innovations, with regard to reading speed, reading performance has been dramatically increased thanks to image processing technology improvements and development of high-resolution CCD elements, such as DSP (Digital Signal Processor). For this reason, the meaning of adopting the same two-dimensional code forming method as in the prior art is weakened.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to solve the drawback that in a conventional two-dimensional code, it is very difficult to increase the density of information stored in a code because it is designed with emphasis on acquisition of code position information and density information. In particular, the present invention provides a two-dimensional code that can increase the density of information.
[0006]
[Means for Solving the Problems]
In order to achieve the object of the present invention, in the two-dimensional code of the present invention, the acquisition of position information and density information is provided as a heading line outside the matrix, and the matrix body is limited to only data elements, thereby storing data. The present invention provides a two-dimensional code that can efficiently process the compression and error correction processing and can increase the density of information. .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the invention according to the claims will be described with reference to the drawings.
[0008]
【Example】
A data part in which bits of binarized data are arranged as a black and white square cell in a two-dimensional matrix, a quadrangle by broken lines 1 to 16 surrounding the bit, and heading lines ab1 to ab3 and bc1 extending perpendicularly from the broken line A two-dimensional code composed of bc3, dc1 to dc3, ad1 to ad3.
[0009]
The width of the rectangle and the heading line is the same as the length of one side of the data cell, and the heading line points to the position in the row or column direction of a specific data cell and is arranged at regular intervals on each side. Is a known constant.
[0010]
The heading lines ab1 to ab3 and bc1 to bc3 from the broken lines arranged between AB and BC are arranged in an inward direction of the rectangle so as not to overlap the data part, and between the other two sides AD and The heading lines ad1 to ad3 and dc1 to dc3 from the broken lines arranged between the DCs are arranged outward in a quadrangular shape, and the lengths of the heading lines are all the same.
[0011]
The outward heading lines are also arranged in the extended portions of the four-corner broken lines like the Q, R, S, and Z portions.
[0012]
As a result, among the corners A, B, C, and D of the quadrangle, the only place where the heading line does not reach the outside of the corner is B, so that the reading device can easily determine the rotation direction of the two-dimensional code. Can do.
[0013]
The number of heading lines can be increased or decreased independently in each of the horizontal and vertical directions depending on the number of internal data, so that two-dimensional codes of various sizes and shapes can be configured depending on the use of the data capacity, printing location, etc. It is possible.
[0014]
There is no special print pattern for cutting out or positioning in the matrix data portion, and more data can be mounted in a small area.
【The invention's effect】
As described above, according to the present invention, the peripheral portion of the two-dimensional matrix data region is surrounded by a broken line, and the header line capable of acquiring the position information and the matrix density information is adjacent to the broken line surrounding the periphery. Efficient data compression and error correction functions by determining the symbol position and information density by deploying inside the two sides and outside the two sides, and allowing only data to be input into the matrix data area. Can provide a two-dimensional code that can be operated automatically.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing an embodiment of a two-dimensional code according to the present invention.
FIG. 2 shows an embodiment of a two-dimensional code design embodiment according to the present invention.
1 to 16 Broken lines A to D Four end points ab1 of a quadrangle formed by broken lines Heading line ab2 arranged at broken line 2 Heading line ab3 arranged at broken line 3 Heading line bc1 arranged at broken line 4 To broken line 5 Heading line bc2 Heading line bc3 arranged on the broken line 6 Heading line Z arranged on the broken line 7 Heading line dc3 arranged on the extension of the broken line 8 Heading line dc2 arranged on the broken line 9 Heading line dc1 Heading line R arranged on the broken line 11 Heading line S arranged on the extension of the broken line 12 Heading line ad3 arranged on the extension of the broken line 13 Heading line ad2 arranged on the broken line 14 Arranged on the broken line 15 Heading line ad1 Heading line Q arranged on the broken line 16 Heading line G arranged on the extension of the broken line 1 Matrix data area

Claims (1)

A data section in which binary data is converted into cells and arranged in a two-dimensional matrix ;
A quadrangle with a broken line surrounding the data part;
The first and second broken lines, which are adjacent two sides of the quadrangle, extend at right angles from the first broken line and the second broken line toward the data portion, and are arranged at regular intervals on the first broken line and the second broken line, respectively. A first heading line;
A third broken line adjacent to the second broken line and a fourth broken line adjacent to the first broken line, which is the other adjacent two sides excluding the first broken line and the second broken line of the square. A second heading line extending from the quadrangle outwardly from each of the quadrilaterals and arranged at the predetermined intervals on each of the third broken line and the fourth broken line;
An angle adjacent to the fourth broken line of the first broken line, an angle adjacent to the third broken line of the second broken line, an angle adjacent to the fourth broken line of the third broken line, and the first The third broken line of 4 broken lines and a third heading line arranged on the extension of each adjacent corner,
The first header lines are arranged at intervals so as not to overlap the data portion,
The two-dimensional code, wherein the first header line and the second header line indicate a row or column direction position of a specific data cell .

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