JP2014115965A - Two-dimensional code reading method, and recording medium recording two-dimensional code reading method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-dimensional code capable of recording a large volume of data and high in symbol recognition accuracy.SOLUTION: A two-dimensional code has symbols arranged in a two-dimensional matrix by converting binary data into a cell. Four positioning symbols different in shape are arranged at the four corners of a two-dimensional matrix data element area MDA to constitute position information acquisition means. Four U-shaped distortion correction symbols are arranged at a middle part connecting the four positioning symbols, thereby providing a two-dimensional code capable of efficiently using the position information and the distortion correction function.

Description

  In the present invention, four positioning symbols having different shapes are arranged at the four corners of the two-dimensional matrix data element area MDA so that position information can be obtained, and each of the four positioning symbols has a central portion. The present invention relates to a two-dimensional code that enables correction of distortion of a two-dimensional code by arranging four symbols for correcting distortion of a character shape.

  2. Description of the Related Art Conventionally, a two-dimensional code and a two-dimensional code reading method that can record a large amount of data and have high reading accuracy have been disclosed (for example, see Patent Document 1). Binary data is converted into cells, and the cells are arranged in two vertical and horizontal directions. The data element area is configured in a two-dimensional matrix, a rectangular part consisting of a broken line surrounding the data element area, and a broken line that forms the rectangular part. And a T-shaped marker for data recognition, which is formed in a T shape with a broken line segment and a heading line and is used to cut out and position a data element region. A two-dimensional code reading method capable of obtaining information recorded in the data element region by reading a two-dimensional code having the number of line segments of the first step, and acquiring first two-dimensional code image data And a second step of detecting continuous T-shaped pixel regions from the image data acquired in the first step, and a continuous T-shape detected in the second step. A third step of determining whether or not the pixel area is a T-shaped marker for data recognition, and the number of T-shaped continuous pixel areas determined as a T-shaped marker for data recognition in the third step 4th step for determining whether or not the predetermined minimum number that can perform the cutting and positioning of the data element area has been reached, and the predetermined step for performing the cutting and positioning in the fourth step A fifth step of detecting a cell array of data element regions using a T-shaped continuous pixel region group determined to be a data recognition T-shaped marker; And a sixth step of acquiring information from the data element region based on the cell array of the data element region detected in the fifth step.

  According to the two-dimensional code reading method according to the first aspect as described above, it is only necessary to detect a continuous T-shaped pixel region as image data and compare the shape with a standard T-shaped marker for data recognition. Since it is possible to detect a plurality of T-shaped continuous pixel region groups arranged around the data element region in accordance with the segmentation and positioning of the region, it is possible to detect four or more cells around the two-dimensional code. Even if a white margin is not ensured, it is possible to improve the recognition rate of the two-dimensional code by the two-dimensional code reader.

JP 2011-70477 A

  However, in the two-dimensional code reading method described in the background art, it is necessary to recognize a number of T-shaped markers arranged outside the two-dimensional matrix data element area MDA as shown in FIG. The matrix data element area and the T-shaped marker are further separated because the T-shaped markers are used by the T-shaped markers as shown in FIG. 3, ie, the 1aa, 2bb, 3cc, and 4dd areas. There was a difficulty in limiting the expansion of the two-dimensional matrix data element area for data recording.

These attempts have been devised on the basis of the number of pixels of an image scanner for reading by a conventional two-dimensional bar code reader and the performance of the CPU. Emphasis is placed on position determination and acquisition of density information. There was no emphasis on increasing information density per area.

However, due to recent technological innovations, the reading accuracy has increased dramatically due to the increase in the number of pixels in the image scanner and the increase in the CPU processing speed. Is fading.

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.

In order to achieve the object of the present invention, in the two-dimensional code of the present invention, in the conventional two-dimensional code, the acquisition of position information and density information is performed as a heading line outside the matrix data element area MDA as shown in FIG. By revising the shape of the matrix data element area MDA narrowed by providing a large number of markers, the position information acquisition is limited to only four positioning symbols at four corners having different shapes, and four distortion correction symbols are provided. As shown in FIG. 4, the area shown in FIG. 3 can be stored and stored as shown in FIG. 4 to provide a two-dimensional code that can increase the amount of information and increase the density. is there.

As described above, according to the present invention, it is possible to easily acquire position information and rotation information by arranging four positioning symbols having different shapes at four corners of a two-dimensional matrix data element region. Also, by arranging four distortion correction symbols in the middle of the four sides of the two-dimensional code, it is possible to provide a two-dimensional code that can be efficiently operated.

It is the schematic which shows one Embodiment of the two-dimensional code concerning this invention. One form of conventional two-dimensional code design Area where data element area is limited by conventional 2D symbols Expansion area of data element area of two-dimensional code according to the present invention An example of a two-dimensional code image cut-out forming method according to the present invention

Embodiments of the invention according to the claims will be described with reference to the drawings.

A data element area portion in which binarized data bits are arranged as a black and white square cell in a two-dimensional matrix, and four positioning symbols having different shapes are arranged at four corners of the two-dimensional matrix data element area. Two-dimensional code that enables correction of two-dimensional code distortion by making it possible to acquire position information and arranging four U-shaped distortion correction symbols in the middle part of each of four positioning symbols .

The distortion correction symbols are located approximately at the center of the straight line connecting the four positioning symbols, and each distortion correction symbol is bent at 90 degrees from the end of the line toward the matrix data element region. It is U-shaped like a headline.

As shown in FIG. 4, the distortion correcting symbols are arranged on a part of the four sides of the quadrangular symbol, and the occupied area is also limited.

As a result, the matrix data element area for recording data elements can be expanded to the areas 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, and 22, and the data recording is accordingly performed. The procedure could be increased.

The two-dimensional code of the present invention can easily determine the position information and the rotation direction by recognizing positioning symbols 1, 2, 3, and 4 having different shapes with an image scanner.

Also, as shown in FIG. 5, four U-shaped distortion correction symbols in which the heading lines 1a, 1b, 2a, 2b, 3a, 3b, 4a, and 4b are arranged toward the data element region are provided. By arranging the four-dimensional code on the four sides, it is possible to configure a two-dimensional code that can easily perform printing and correction of paper distortion.

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.

Positioning symbol 1
Positioning symbol 2
Positioning symbol 3
Positioning symbol 4
Distortion correction symbol 1
Distortion correction symbol 2
Distortion correction symbol 3
Distortion correction symbol 4
1aa Area occupied by T-shaped marker 2bb Area occupied by T-shaped marker 3cc Area occupied by T-shaped marker 4dd Area occupied by T-shaped marker 11 Enlarged matrix data element area 12 Enlarged Matrix data element area 13 Expanded matrix data element area 14 Expanded matrix data element area 15 Expanded matrix data element area 16 Expanded matrix data element area 17 Expanded matrix data element area 18 Expanded matrix data element area 19 Expanded matrix Data element area 20 Enlarged matrix data element area 21 Enlarged matrix data element area 22 Enlarged matrix data element area 1a Distortion correction thin toward data element area Heading line 1b of the distortion correction symbol 1 in the direction of the data element area 2a heading line 2b of the distortion correction symbol 2 in the direction of the data element area Heading line 3b of distortion correction symbol 3 in the region direction Heading line 4b of distortion correction symbol 3 in the direction of data element region Heading line 4b of distortion correction symbol 4 in the direction of data element region Distortion correction symbol 4 in the direction of data element region Headline

It is the schematic which shows one Embodiment of the two-dimensional code concerning this invention. One form of conventional two-dimensional code design Area where data element area is limited by conventional 2D symbols Expansion area of data element area of two-dimensional code according to the present invention An embodiment showing a positional relationship between a positioning symbol and a distortion correcting symbol of a two-dimensional code according to the present invention An example of a two-dimensional code image cut-out forming method according to the present invention

Claims (3)

  In a two-dimensional code in which binary data is converted into cells and symbols are arranged and arranged in a two-dimensional matrix, four positioning symbols with different shapes and four positioning symbols are provided at the four corners of the two-dimensional matrix data element area MDA. A two-dimensional code characterized in that four U-shaped distortion correction symbols are arranged in the middle part of the symbol for use.   2. The two-dimensional code according to claim 1, wherein the cell data element area and four positioning symbols are arranged apart from each other.   2. The two-dimensional code according to claim 1, wherein the cell-shaped data element area and four U-shaped distortion correction symbols are arranged apart from each other.

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