JPH07262330A - Display body with two-dimensional code and two-dimensional code reader - Google Patents

Abstract

PURPOSE:To improve safety by preventing code contents from being easily decoded by deciding the code contents of respective modules based on the code contents of a key module. CONSTITUTION:Concerning a two-dimensional code 20, plural modules 11 expressed by squares composed of two columns x two rows [(m) columns X(n) rows] are coupled in the column direction. The third module 11 is defined as a key module 12. The respective modules 11 are decoded based on decoding patterns 1-16 to be set corresponding to the code contents of this key module 12. When all the squares inside the key module 12 are white, for example, the decoding pattern 1 is selected. According to this decoding pattern 7, the first module 11 is coded by a positive pattern, the second module 11 is coded by a reverse setting pattern and by executing coding up to an N-th module 11, the two-dimensional code 20 is decoded into 1000, 1011,..., 1010 as shown in the decoded result (1).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display and a two-dimensional code reading device provided with a two-dimensional code in which cells each having m columns and n rows are provided as one module.

[0002]

2. Description of the Related Art A lot of bar codes for product management are attached to the packaging of products and the like. In recent years, the two-dimensional code 10 shown in FIG. 4 (a) is being used instead of the bar code. In this two-dimensional code 10, the cells represented by m columns × n rows are set as one module 11, and the cells in the module 11 are white (representing “0”) or black (representing “1”). ) Are arranged based on the arrangement order shown in FIG. 4B, so that a specific code (0001,00) can be obtained.
01, 1000, ...) is formed (note that
In the example of FIG. 4A, the module 11 is set to m = 2 and n = 2). Unlike the barcode in which information is arranged in a one-dimensional direction, the two-dimensional code 10 can perform a two-dimensional arrangement of information and has an advantage of expressing more information.

As a reading device for such a two-dimensional code 10, for example, one shown by reference numeral 100 in FIG. 5 is known. This two-dimensional code reader 100
Fixes the sensors 3 and 4 corresponding to the rows of the two-dimensional code 10 in the groove 2 formed in the device body 1, and two-dimensionally in the arrow direction (column direction of the two-dimensional code 10) along the groove 2. By passing through the display body 5 such as a business card to which the code 10 is attached, the bit information attached to the cells of the two-dimensional code 10 (information indicating whether the cells are white or black) is read.

[0004]

By the way, in the two-dimensional code 10 as described above, a specific code is formed by selectively filling the cells as shown in FIG. 4 (a). However, such a grid can be easily deciphered if the arrangement order of the bit information as shown in FIG. 4B is known, and as a result, the two-dimensional code 10 has a highly confidential content. In the case of showing, the content may be easily revealed and it may cause a safety problem.

The present invention has been made in view of the above circumstances, and a display body and a two-dimensional code reading device provided with a two-dimensional code capable of improving the security by making the code contents unreadable. The purpose is to provide a device.

[0006]

In order to achieve the above object, in the display body provided with the two-dimensional code shown as the first invention, a plurality of modules consisting of cells of m columns × n rows are arranged in the column direction. In the generated two-dimensional code, one of the modules is a key module, and the code content of each module is determined based on the code content of this key module.

Further, in the two-dimensional code reading device shown as the second invention, one of the modules is set in the two-dimensional code in which a plurality of modules composed of cells of m columns × n rows are arranged in the column direction. A plurality of decryption patterns corresponding to the code contents of the key module are stored, and the code contents of each module are determined based on the decryption pattern selected by the key module.

[0008]

In the display body with the two-dimensional code shown as the first invention, one of the modules is a key module,
Since the code content of each module is determined based on the code content of this key module, unless the code content of this key module is determined and the code content of this key module is determined, The code contents cannot be deciphered, and it is prevented that the code contents of the module are easily read as in the conventional case.

In the two-dimensional code reading device shown as the second invention, a plurality of decoding patterns corresponding to the code contents of the key module set in one of the modules are stored, and selected according to the code contents of the key module. Since the code content of each module is determined based on the decoding pattern, it is possible to decode the code content of each module only after selecting the decoding pattern, and the code content of the module can be simplified as before. It is prevented from being read.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The two-dimensional code 20 shown in this embodiment is a two-dimensional code reading device 20 as shown in FIG.
Although it is read by 0, the decoding system for decoding the two-dimensional code 20 is different from that of the conventional two-dimensional code reading device 200. That is, 2 of the present embodiment
In the dimension code 20, a plurality of modules 11 each represented by a grid of 2 columns × 2 rows (m columns × n rows) are combined in the column direction (the module from the left, the module from the left, the module from the left, ... N A second module), of which the th module 11 is the key module 12, and a decoding pattern (described later) set according to the code content of the key module 12 and a predetermined pattern Each module 11 is decrypted based on the "normal" and "reverse" setting patterns 13.

First, the "normal" and "reverse" setting patterns 13 will be described. As shown in FIG. 2, the "normal" setting pattern 13 stores bit information in the module 11 as "a1".
→ a2 → a3 → a4 ”and arrange white in order of“ 0 ”,
Black is defined as "1", and the setting pattern 13 of "reverse" sets the bit information in the module 11 to "a".
Arrange in the order of 1 → a2 → a3 → a4 and set white to “1”,
Black is defined as "0". Next, the code contents of the key module 12 and the setting pattern 1 of "forward" and "reverse"
3, a method of decrypting the module 11 will be described. There are 16 decryption patterns set according to the key module 12 as shown in FIG.
The module 11 is decrypted corresponding to each of the decryption patterns (1) to (16).

Specifically, as shown in FIG. 1, when all the cells in the key module 12 are "white", the decryption pattern (1) is selected, and in accordance with this decryption pattern (1), Code the thirteenth module 11 with the “positive” setting pattern 13, and the thirteenth module 11 as “reverse”.
, The thirteenth module 11 (which is also the key module 12) is coded with the “positive” setting pattern 13, the thirteenth module 11 is coded with the “positive” setting pattern 13, and so on. By performing this up to the Nth module 11, the two-dimensional code 20 becomes "1" as shown in the decoding result (1) of FIG.
000,1011,1100,0100,1101,1
010, ..., 1010 ”.

Similarly, when the "a1" of the grid in the key module 12 is "black" and the "a2, a3, a4" is white, the decryption pattern (2) is selected, and this decryption pattern is selected. According to the pattern (2), the th module 11 is coded with the “positive” setting pattern 13, the th module 11 is coded with the “positive” setting pattern 13,
The 12th module 11 (12) is coded with the "reverse" setting pattern 13, and the 12th module 11 is "correct"
By encoding with the setting pattern 13 of ..., And this is performed up to the Nth module 11, the two-dimensional code 20 becomes "100
0,0100,0011,0100,0010,010
1, ..., 0101 ” In the same way,
Decoding patterns (3) to (16) are selected based on the color scheme of the cells in the key module 12, and the selected decoding patterns (3) to (16) and the "correct" and "reverse" setting patterns 13 are selected.
The two-dimensional code 20 is decoded according to.

Next, a 2 for reading and decoding the two-dimensional code 20 having the key module 12 as described above.
The control contents of the dimension code reading device 200 will be described step by step with reference to the flowchart of FIG. In addition, the above-mentioned “normal” and “reverse” setting patterns 13 and the decoding patterns (1) to (16) corresponding to the key module 12
Is set and stored in advance.

<< Step 1 >> to << Step 2 >> When the two-dimensional code 20 is read by the sensors 3 and 4 (step 1), the two-dimensional code 20 read by the sensors 3 and 4 is used in module 11 units. Store in buffer (step 2).

<< Step 3 >> One of the corresponding decoding patterns (1) to (16) is selected on the basis of the bit information in the th module 11 stored in step 2, that is, the color scheme of the cells in the key module 12. . << Step 4 >> Based on the decoding patterns (1) to (16) selected in Step 3 and the above-mentioned "correct" and "reverse" setting patterns 13, the Nth to 11th modules 11 are coded, thereby Decode the dimension code 20. << Step 5 >> Two-dimensional code 20 decoded in Step 4
After outputting, the present flowchart ends.

As described above in detail, in the two-dimensional code 20 shown in this embodiment, one of the modules 11 is the key module 12, and the code content of each module 11 is determined based on the code content of this key module 12. Therefore, unless the key module 12 is identified and the code content of the key module 12 is not identified, the code content of each module 11 cannot be decrypted. Along with this, the two-dimensional code 2
In the two-dimensional code reading device 200 that reads and decodes 0, the decoding patterns (1) to (1) corresponding to the code content of the key module 12 set in one of the modules 11 are used.
6) are stored, and the code contents of each module 11 are determined based on the decoding patterns (1) to (16) selected according to the code contents of the key module 12, so these decoding patterns ( Only when 1) to (16) are selected, the code contents of each module 11 can be decoded, and as a result, the code contents of the module 11 can be prevented from being easily read as in the conventional case, and the two-dimensional It is possible to increase the confidentiality of the code 20.

In the above embodiment, the module 11 having 2 columns × 2 rows is used, but the number of columns and the number of rows are not particularly limited and can be set arbitrarily. Further, in the above embodiment, the th module 1
1 is the key module 12, but which module 11
Whether to use the key module 12 can be arbitrarily set. Further, in the above embodiment, 16 decryption patterns of the key module 12 are provided, but the number is not particularly limited, and it can be arbitrarily changed according to the number of columns and rows of the module 11. To do.

Further, in the above embodiment, the "correct" as shown in FIG. 2 is corresponded to the decoding patterns (1) to (16).
Although the “reverse” setting pattern 13 is provided, the setting content and the number of such setting patterns 13 (two in this example, “normal” and “reverse”) are not particularly limited, and the setting can be changed arbitrarily. Is. Also, these setting patterns 13 are
"0" or "1" is defined for white and black for each "normal" and "reverse". In addition to this, the arrangement order of these "0" and "1" is "a1 → a2 → a3 → a4". ] May be changed as appropriate, and white is fixed to “0” and black is fixed to “1”, and “normal” and “reverse”
The arrangement order may be set for each.

[0020]

As described above in detail, in the display body with the two-dimensional code shown as the first invention, one of the modules is a key module, and the code content of each module is based on the code content of this key module. Since it is determined, the code contents of each module cannot be deciphered unless the code contents of the key module can be determined and the code contents of the key module can be determined. It is possible to prevent the code contents of the module from being easily read and enhance the confidentiality of the two-dimensional code.

In the two-dimensional code reading device shown as the second invention, a plurality of decoding patterns corresponding to the code contents of the key module set in one of the modules are stored and selected according to the code contents of the key module. Since the code content of each module is determined based on the decoding pattern, it is possible to decode the code content of each module only after selecting the decoding pattern, and the code content of the module can be simplified as before. It is possible to prevent the code from being read and enhance the confidentiality of the two-dimensional code.

[Brief description of drawings]

FIG. 1 is a diagram showing decoding patterns (1) to (16) for decoding a module of a two-dimensional code 20.

FIG. 2 is a diagram showing a “normal” and “reverse” setting pattern 13;

FIG. 3 is a flowchart showing the control contents of the two-dimensional code reading device 200.

FIG. 4 is a diagram for explaining decoding of a conventional two-dimensional code 10.

FIG. 5 is a perspective view showing a two-dimensional code reading device 100/200 according to the related art and the present invention.

[Explanation of symbols]

 1 Device Main Body 2 Groove 3 Sensor 4 Sensor 5 Display 10 Two-dimensional Code 11 Module 12 Key Module 13 Setting Pattern 20 Two-dimensional Code (1) to (16) Decoding Pattern 100 Two-dimensional Code Reader 200 Two-dimensional Code Reader

Claims (2)

[Claims] 1. A display body having a two-dimensional code in which a plurality of modules each having m columns × n rows are arranged in a column direction, wherein one of the modules is a key module, and the module is a key module. A display body with a two-dimensional code, wherein the code content of each module is determined based on the code content. 2. A two-dimensional code reading device for reading a two-dimensional code in which a plurality of modules each having m columns × n rows are arranged in a column direction, the key being set in one of the modules. A two-dimensional code reading device characterized in that a plurality of decryption patterns corresponding to the code contents of a module are stored, and the code contents of each module are determined based on the decryption pattern selected by the key module.