JP2008171130A - Two-dimensional code and creating method of two-dimensional code - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide superimposed readable two-dimensional codes each of which can record/read information. <P>SOLUTION: By making each module with a first QR code Q1, a second QR code Q2, and a third QR code QR3 not exceeding the maximum rate of error of the corresponding QR codes, respectively, the first QR Code Q1, the second QR Code Q2, and the third QR code QR3 are made readable, respectively. Thereby, third information (Japanese) can be read from the third QR code QR3 (Fig. 1(A)) on which the first QR code Q1 and the second QR code Q2 are superimposed, and with the second QR code Q2 being detached from the first QR code Q1 (Fig. 1 (B), Fig. 1 (C)), first information (English) of the first QR code Q1 and second information (Italian) of the second QR code Q2 can be read, respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to a two-dimensional code such as a QR code (registered trademark) printed or pasted on a product or the like, and a method for generating a two-dimensional code, and particularly to generation of a two-dimensional code and a two-dimensional code having an error correction function. It is about the method.

A material such as a paper, on which a two-dimensional code such as a QR code is printed, is attached to an article or document, and this is optically read to identify the article. Here, Patent Document 1 discloses a code tag on which a two-dimensional code in which flat information is recorded and a two-dimensional code in which encryption information is recorded are printed. Patent Document 1 forms a new code pattern by performing complex arithmetic processing on a code pattern of a two-dimensional code in which first information is recorded and a two-dimensional code in which second information is recorded. is there.
JP 2005-227526 A

In the new code pattern formation by the method of Patent Document 1, it is possible to form a new code pattern. However, a new code pattern can be formed by superimposing another two-dimensional code on a physically printed two-dimensional code. It did not show the concept of forming a pattern.

The present invention has been made in order to solve the above-described problems, and an object of the present invention is to superimpose two-dimensional codes each of which can record and read information, and to further read two-dimensional codes and two-dimensional codes. It is to provide a method for generating a dimension code.

In order to achieve the above object, the two-dimensional code of claim 1 includes a first two-dimensional code composed of a light module and a dark module on which the first information is recorded, and a second information printed on a transparent film. A two-dimensional code having a recorded two-dimensional code consisting of a transparent module and a dark module,
The two-dimensional code is transmitted through the dark module of the second two-dimensional code and the transparent module of the second two-dimensional code by superimposing the second two-dimensional code on the first two-dimensional code. A third two-dimensional code comprising a light module or a dark module of the first two-dimensional code,
Each module of the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code has a maximum error rate of an error correction function based on error correction information of each two-dimensional code. It is a technical feature that the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code can be read by adjusting so as not to exceed.

The two-dimensional code according to claim 2 includes a first two-dimensional code composed of a light module and a dark module in which the first information is recorded, a transparent module printed on a transparent film and recorded in the second information, A two-dimensional code having a second two-dimensional code comprising a light module,
The two-dimensional code is transmitted through the light module of the second two-dimensional code and the transparent module of the second two-dimensional code by superimposing the second two-dimensional code on the first two-dimensional code. A third two-dimensional code comprising a light module or a dark module of the first two-dimensional code,
Each module of the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code has a maximum error rate of an error correction function based on error correction information of each two-dimensional code. It is a technical feature that the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code can be read by adjusting so as not to exceed.

According to another aspect of the present invention, there is provided a two-dimensional code generation method in which a first two-dimensional code including a light module and a dark module in which first information is recorded, and second information printed on a transparent film. A method for generating a second two-dimensional code comprising a transparent module and a dark module and a two-dimensional code to be generated,
In the two-dimensional code, the first two-dimensional code and the second two-dimensional code are obtained by superimposing the second two-dimensional code printed on a transparent film on the first two-dimensional code. A third two-dimensional code having third information configured by:
A storage step for storing the first information, the second information, and the third information; and according to the first information, the second information, and the third information, any of the modules Module generation step to generate
A comparison step of comparing a module according to the first information in the same position, a module according to the second information, and a module according to the third information;
In the module according to the first information, the module according to the second information, and the module according to the third information, the combination increases the error rate of the first information, and the error rate of the third information If one of the modules according to the first information is converted into the other module by a first predetermined ratio, an error occurs in the first information, and the first information is reduced. The first predetermined ratio so as not to exceed a maximum error rate of an error correction function based on error correction information each of the two-dimensional code, the second two-dimensional code, and the third two-dimensional code. A first two-dimensional code generation step for setting and generating the first two-dimensional code;
In the module according to the first information, the module according to the second information, and the module according to the third information, the combination increases the error rate of the second information, and the error rate of the third information If one of the modules according to the second information is converted into the other module by a second predetermined ratio, an error occurs in the second information and the first information is reduced. The second predetermined ratio is set so as not to exceed a maximum error rate of an error correction function based on error correction information each of the two-dimensional code, the second two-dimensional code, and the third two-dimensional code. A second two-dimensional code generation step for setting and generating the second two-dimensional code;
A two-dimensional code output step of outputting the first two-dimensional code and the second two-dimensional code;

9. The two-dimensional code generation method according to claim 8, wherein the first two-dimensional code comprising a light module and a dark module in which the first information is recorded, and a transparent module in which the second information is recorded on a transparent film. A second two-dimensional code composed of a light module and a two-dimensional code generation method,
In the two-dimensional code, the first two-dimensional code and the second two-dimensional code are obtained by superimposing the second two-dimensional code printed on a transparent film on the first two-dimensional code. A first two-dimensional code having the first information recorded therein and a second two-dimensional code having the second information recorded therein. And a first third two-dimensional code in which the third information is recorded,
A storage step for storing the first information, the second information, and the third information; and according to the first information, the second information, and the third information, any of the modules Module generation step to generate
A comparison step of comparing a module according to the first information in the same position, a module according to the second information, and a module according to the third information;
In the module according to the first information, the module according to the second information, and the module according to the third information, the combination increases the error rate of the first information, and the error rate of the third information If the module according to the first information is converted into the other module by a third predetermined ratio, an error occurs in the first information, and the first two The first two-dimensional code by setting the third predetermined ratio so as not to exceed a maximum error rate of an error correction function based on error correction information each of the dimension code and the third two-dimensional code. A first two-dimensional code generation step for generating
A second two-dimensional code generation step for generating a second two-dimensional code based on the module generated in the module generation step;
And a two-dimensional code output step of outputting the first two-dimensional code and the second two-dimensional code.

The two-dimensional code according to claim 1, wherein the first two-dimensional code includes a light module and a dark module, and the second two-dimensional code includes a transparent module and a dark module, and is printed on a transparent film. Therefore, the third two-dimensional code is formed by superimposing the second two-dimensional code on the first two-dimensional code, and the second two-dimensional code dark module and the second two-dimensional code are transparent. A light module or a dark module of the first two-dimensional code transmitted through the module. Each module of the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code exceeds the maximum error rate of the error correction function based on the error correction information of each two-dimensional code. By adjusting so that the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code can be read. Therefore, the third information can be read from the third two-dimensional code obtained by superimposing the first two-dimensional code and the second two-dimensional code, and the second information can be read from the first two-dimensional code. With the two-dimensional code removed, the first information of the first two-dimensional code and the second information of the second two-dimensional code can be read.

The two-dimensional code according to claim 2, wherein the first two-dimensional code includes a light module and a dark module, and the second two-dimensional code includes a transparent module and a light module, and is printed on a transparent film. Therefore, the third two-dimensional code is formed by superimposing the second two-dimensional code on the first two-dimensional code, and the second two-dimensional code light module and the second two-dimensional code are transparent. A light module or a dark module of the first two-dimensional code transmitted through the module. Each module of the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code exceeds the maximum error rate of the error correction function based on the error correction information of each two-dimensional code. By adjusting so that the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code can be read. Therefore, the third information can be read from the third two-dimensional code obtained by superimposing the first two-dimensional code and the second two-dimensional code, and the second information can be read from the first two-dimensional code. With the two-dimensional code removed, the first information of the first two-dimensional code and the second information of the second two-dimensional code placed on the object can be read.

In the two-dimensional code of claim 3, since the error rates of the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code are approximated, any two-dimensional code has a low error rate. Easy to read.

In the two-dimensional code generation method according to claim 4, a light module and a dark module are generated according to the first information, the second information, and the third information, and the module according to the first information at the same position and the second information The module according to the information is compared with the module according to the third information.
And
(1) In the module according to the first information, the module according to the second information, and the module according to the third information, the combination increases the error rate of the first information and decreases the error rate of the third information If one of the modules according to the first information is converted into the other module by a first predetermined ratio, an error is generated in the first information, and the first two-dimensional code, The first two-dimensional code is set to a first predetermined ratio so as not to exceed the maximum error rate of the error correction function based on the error correction information each of the second two-dimensional code and the third two-dimensional code. Generate code.
(2) In the module according to the first information, the module according to the second information, and the module according to the third information, the combination increases the error rate of the second information and decreases the error rate of the third information If one of the modules according to the second information is converted into the other module by a second predetermined ratio, an error is generated in the second information, and the first two-dimensional code, The second two-dimensional code is set to a second predetermined ratio so as not to exceed the maximum error rate of the error correction function based on the error correction information each of the second two-dimensional code and the third two-dimensional code. Generate code.
Accordingly, the first two-dimensional code in which the first information is recorded, the second two-dimensional code in which the second information is recorded, and the third two-dimensional code in which the third information is recorded are read. And the third two-dimensional code may generate a two-dimensional code configured by superimposing the second two-dimensional code printed on the transparent film on the first two-dimensional code. it can.

In claim 5, in step (1) of claim 4,
(I) When the module according to the first information is a light module, the module according to the second information is a transparent module, and the module according to the third information is a dark module, at least the light module according to the first information is changed to the dark module. Convert only the percentage of.
(Ii) When the module according to the first information is a dark module, the module according to the second information is a transparent module, and the module according to the third information is a light module, at least the dark module according to the first information is changed to a light module. Convert by the second percentage.
(Iii) The first ratio so as not to exceed the maximum error rate of the error correction function based on the error correction information that each of the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code has And the 1st predetermined ratio which consists of a 2nd ratio is set, and a 1st two-dimensional code is produced | generated.
Accordingly, the first two-dimensional code in which the first information is recorded, the second two-dimensional code in which the second information is recorded, and the third two-dimensional code in which the third information is recorded are read. And the third two-dimensional code may generate a two-dimensional code configured by superimposing the second two-dimensional code printed on the transparent film on the first two-dimensional code. it can.

In claim 6, in step (2) of claim 4 above,
(I) When the module according to the first information is a light module, the module according to the second information is a transparent module, and the module according to the third information is a dark module, the transparent module according to at least the second information is changed to the dark module. Convert only the percentage of.
(Ii) When the module according to the first information is a light module, the module according to the second information is a dark module, and the module according to the third information is a light module, at least the dark module according to the second information is changed to the transparent module. Convert only the percentage of.
(Iii) The third ratio so as not to exceed the maximum error rate of the error correction function based on the error correction information that each of the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code has And the 2nd predetermined ratio which consists of 4th ratio is set, and the 2nd two-dimensional code is generated.
Accordingly, the first two-dimensional code in which the first information is recorded, the second two-dimensional code in which the second information is recorded, and the third two-dimensional code in which the third information is recorded are read. And the third two-dimensional code may generate a two-dimensional code configured by superimposing the second two-dimensional code printed on the transparent film on the first two-dimensional code. it can.

In the two-dimensional code generation method according to claim 7, since the error rates of the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code are approximated, any two-dimensional code is erroneous. The rate is low and easy to read.

In the two-dimensional code generation method according to claim 8, a light module and a dark module are generated according to the first information, the second information, and the third information, and the module according to the first information at the same position and the second information The module according to the information is compared with the module according to the third information.
(1) In the module according to the first information, the module according to the second information, and the module according to the third information, the combination increases the error rate of the first information and decreases the error rate of the third information If the first information is converted, the module according to the first information is converted into the other module by a third predetermined ratio, thereby causing an error in the first information, the first two-dimensional code, and the first The first two-dimensional code is generated by setting a third predetermined ratio so as not to exceed the maximum error rate of the error correction function based on the error correction information each of the three two-dimensional codes has.
Accordingly, the first two-dimensional code in which the first information is recorded, the second two-dimensional code in which the second information is recorded by being placed on the colored object, and the third information are recorded. And the third two-dimensional code can be read by superimposing the second two-dimensional code printed on the transparent film on the first two-dimensional code. A constructed two-dimensional code can be generated.

In the ninth aspect, in the step (1) of the eighth aspect,
(I) When the module according to the first information is a light module, the module according to the second information is a transparent module, and the module according to the third information is a dark module, at least the light module according to the first information is changed to the dark module. Convert only the percentage of.
(Ii) When the module according to the first information is a dark module, the module according to the second information is a transparent module, and the module according to the third information is a light module, at least the dark module according to the first information is changed to the light module. Convert only the percentage of.
(Iii) When the module according to the first information is a light module, the module according to the second information is a light module, and the module according to the third information is a dark module, at least the light module according to the first information is changed to the dark module. Convert only the percentage of.
(IV) When the module according to the first information is a dark module, the module according to the second information is a light module, and the module according to the third information is a light module, at least the dark module according to the first information is designated as the light module. Convert only the percentage of.
(V) a fifth ratio, a sixth ratio, a second ratio so as not to exceed the maximum error rate of the error correction function based on the error correction information that each of the first two-dimensional code and the third two-dimensional code has. The first predetermined two-dimensional code is generated by adjusting the third predetermined ratio including the ratio of 7 and the eighth ratio.
Accordingly, the first two-dimensional code in which the first information is recorded, the second two-dimensional code in which the second information is recorded by being placed on the colored object, and the third information are recorded. And the third two-dimensional code can be read by superimposing the second two-dimensional code printed on the transparent film on the first two-dimensional code. A constructed two-dimensional code can be generated.

In the two-dimensional code generation method according to the tenth aspect, since the error rates of the first two-dimensional code and the third two-dimensional code are approximated, any two-dimensional code has a low error rate and is easy to read.

[First embodiment]
The QR code according to the first embodiment that embodies the two-dimensional code of the present invention will be described with reference to FIGS.
1A shows the third QR code QR3 according to the first embodiment, FIG. 1B shows the second QR code Q2, and FIG. 1C shows the first QR code Q1. Here, the third QR code Q3, the second QR code Q2, and the first QR code Q1 are formed to have the same outer diameter, and include three position detection patterns P for cutting out and a module (cell) S in which information is recorded. Become. The QR code module is provided with an error correction function using Reed-Solomon codes so that decoding is possible even if there is a code error if the data is within a maximum of 30%, for example.

Here, the first QR code Q1 shown in FIG. 1C is printed on, for example, white paper 12, and the module (S) includes a printed portion (dark) and a non-printed portion (bright). The first QR code Q1 stores character information in English, and can be read in English by an optical information reader. Moreover, the 2nd QR code Q2 shown to FIG. 1 (B) is printed, for example on the transparent film 14, and a module (S) is provided with a printing part (dark) and a non-printing part (bright: transparent). The second QR code Q2 stores character information in Italian, and can read information in Italian by an optical information reader. The third QR code Q3 shown in FIG. 1 (A) is obtained by attaching the second QR code Q2 to the first QR code Q1 by sticking the transparent film 14 on the white paper 12 on which the first QR code Q1 of FIG. 1 (C) is printed. It is a stack of things. The three position detection patterns P of the first QR code Q1 and the second QR code Q2 match. On the other hand, the module (S) of the third QR code QR3 is composed of the dark module of the second QR code Q2 and the light module or dark module of the first QR code Q1 that has passed through the non-printed portion (bright: transparent) of the second QR code Q2. Become. The third QR code QR3 stores character information in Japanese, and the information in Japanese can be read by the optical information reader. In the first embodiment, specifications of devices having the same content, for example, a QR code printed in Japanese, English, and Italian are described.

Here, the reason why each of the three modules (cells) S can be read by recording different information in the three first QR codes Q1, the second QR code Q2, and the third QR code QR3 is the same. This is because the place is converted in accordance with a predetermined rule to obtain an error code and correction is performed by the error correction function.

The conversion of the light / dark inconsistent portions of the module (cell) S will be described with reference to FIG. The left side in FIG. 2A shows all patterns of cells (modules) of the first QR code Q1, the second QR code Q2, and the third QR code QR3. As shown in the figure, there are 8 patterns of combinations of light (white) / dark (black) of the first QR code Q1 and third QR code QR3 and light (transparent) / dark (black) of the second QR code Q2. The right side in FIG. 2A shows a pattern when the second QR code Q2 is superimposed on the first QR code Q1. When the first QR code Q1-second QR code Q2-third QR code QR3 is white-transparent-black, white-transparent-white, and the cell of the third QR code QR3 becomes an error. Similarly, in the case of white-black-white, the cell of the third QR code QR3 becomes an error in the case of white-black-black, and in the case of black-transparent-white, it becomes black-transparent-black and the third QR code QR3. Cell becomes an error, and in the case of black-black-white, it becomes black-black-black, and the cell of the third QR code QR3 becomes an error. That is, 4 out of 8 patterns are errors in the cell of the third QR code QR3, and the error rate of the third QR code QR3 is 50%, which exceeds the maximum reading rate of 30%.

For this reason, in the first embodiment, as shown in FIG. 2B, when the first QR code Q1-second QR code Q2-third QR code QR3 is white-transparent-black, the first- 1 QR code Q1 side is assumed to be an error. Similarly, in the case of white-black-white, the cell of the second QR code QR2 is erroneous as white-transparent-white, and in the case of black-transparent-white, the cell of the first QR code QR1 is erroneous as white-transparent-white. In the case of black-black-white, the cell of the third QR code QR3 is regarded as an error as black-black-black. That is, in the first QR code Q1, 2 out of 8 patterns are errors, and the error rate is adjusted to 25%. In the second QR code Q2, one of the eight patterns becomes an error, and the error rate is adjusted to 12.5%. In the third QR code Q3, one of the eight patterns becomes an error, and the error rate is adjusted to 12.5%.

The QR code generation process in the first embodiment shown in FIG. 2B will be described with reference to FIG. First, first information (English), second information (Italian), and third information (Japanese) are stored (S12), and a QR code before conversion is generated from the stored information (S14). Then, the modules (cells) at the same position are compared (S16), and it is determined whether they are conversion patterns (S18). As described above with reference to FIG. 2B, in the case of white-transparent-black (S18: Yes), it is converted to black-transparent-black (S20). Similarly, when white-black-white, (S18: Yes), white-transparent-white (S20), and when black-transparent-white (S18: Yes), white-transparent-white (S20) ), Black-black-white (S18: Yes), black-black-black is set (S20). When the processing is completed for all the modules (S24: Yes), the first QR code Q1, the second QR code Q2, and the third QR code QR3 described above with reference to FIG. 1 are completed, and the first QR code Q1, the first QR code Q1, The 2QR code Q2 is output (S28).

In the QR code of the first embodiment, each module of the first QR code Q1, the second QR code Q2, and the third QR code QR3 is set so as not to exceed the maximum error rate of the QR code. Each of the code Q1, the second QR code Q2, and the third QR code QR3 can be read. Therefore, the third information (Japanese) can be read from the third QR code QR3 obtained by superimposing the first QR code Q1 and the second QR code Q2 (FIG. 1A), and the first QR code Q1. In the state where the second QR code Q2 is peeled off (FIG. 1 (B), FIG. 1 (C)), the second information (English) of the first QR code Q1 and the second information (Italian) of the second QR code Q2, respectively. And can be read.

In the QR code generation method of the first embodiment, a light module and a dark module are generated according to the first information (English), the second information (Italian), and the third information (Japanese), The module according to the first information, the module according to the second information, and the module according to the third information are compared.
And
(1) When the module according to the first information is bright, the module according to the second information is bright (transparent), and the module according to the third information is dark (occurrence probability 12.5% = 1/8), the first The light module according to the information is converted into a dark module.
(2) When the module according to the first information is dark, the module according to the second information is bright (transparent), and the module according to the third information is bright (occurrence probability 12.5% = 1/8), By converting the dark module according to the first information into the light module so as not to increase the error rate, the first QR code Q1 in which the first information is recorded has an error, and the error rate does not exceed the maximum error rate. (12.5% + 12.5%) to generate the first QR code Q1.
(3) When the module according to the first information is bright, the module according to the second information is dark, and the module according to the third information is bright (occurrence probability 12.5% = 1/8), the overall error rate is By converting the dark module according to the second information to the light module so as not to increase the error, the second QR code Q2 in which the second information is recorded has an error and the error rate does not exceed the maximum error rate ( 12.5%) to generate the second QR code Q2.
(4) When the module according to the first information is dark, the module according to the second information is dark, and the module according to the third information is light (occurrence probability 12.5% = 1/8), the overall error rate is By converting the light module according to the third information to the dark module so as not to increase the error, the third QR code QR3 in which the third information is recorded has an error and the error rate does not exceed the maximum error rate ( 12.5%) to generate the third QR code QR3.
Thereby, the first QR code Q1 in which the first information is recorded, the second QR code Q2 in which the second information is recorded, and the third QR code QR3 in which the third information is recorded can be read, and The third QR code QR3 can generate a QR code configured by superimposing the second QR code Q2 printed on the transparent film on the first QR code Q1.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
In the first embodiment described above, the error rate of the first QR code Q1 is 25%, and the error rates of the second QR code Q2 and the third QR code QR3 are 12.5%. On the other hand, in the second embodiment, the error rate of the first QR code Q1, the second QR code Q2, and the third QR code QR3 is uniform at 16.6% or approximated to 16.6%.

In the second embodiment, as shown in FIG. 4B, when the first QR code Q1-second QR code Q2-third QR code QR3 is white-transparent-black, the first QR code Q1 is black-transparent-black. The ratio of error in the side, the ratio of error in the second QR code Q2 as white-black-black, and the ratio of error in the third QR code Q3 as white-transparent-white are made uniform. That is, an error rate of +1/24 is uniformly assigned to the first QR code Q1, the second QR code Q2, and the third QR code QR3. Further, similarly to the first embodiment, when white-black-white, the cell of the second QR code QR2 is erroneous as white-transparent-white, and when black-transparent-white, the first QR is white-transparent-white. The cell of the code QR1 is regarded as an error, and when black-black-white, the cell of the third QR code QR3 is regarded as an error as black-black-black. That is, the error rate of each of the first QR code Q1, the second QR code Q2, and the third QR code QR3 is adjusted to 16.6% (1/8 + 1/24).

The QR code generation process in the first embodiment shown in FIG. 4B will be described with reference to FIG. First, first information (English), second information (Italian), and third information (Japanese) are stored (S12), and a QR code before conversion is generated from the stored information (S14). Then, the modules (cells) at the same position are compared (S16), and it is determined whether they are conversion patterns (S18). When the pattern is a conversion pattern (S18: Yes), and in the case of white-transparent-black (conversion pattern 1) as described above with reference to FIG. 4B (S18: Yes), in S26 , White-transparent-black (conversion pattern 1) discovery times {3N-2 (black-transparent-black), 3N-1 (white-black-black), 3N (white-transparent-white)} (N = natural number). As a result, the ratio of black-transparent-black error on the first QR code Q1 side, the ratio of white-black-black error on the second QR code Q2 side, and the white-transparent-white error on the third QR code Q3 side. The ratio of the error is made uniform. On the other hand, in the case of white-black-white (conversion pattern 2) (S22: Yes), white-transparent-white (S20), and in the case of black-transparent-white (conversion pattern 2) (S22: Yes), White-transparent-white (S20), and black-black-white (conversion pattern 2) (S22: Yes), black-black-black (S20). When the process is completed for all modules (S24: Yes), the first QR code Q1, the second QR code Q2, and the third QR code QR3 described above with reference to FIG. 1 are completed, and the first QR code Q1 is completed. The second QR code Q2 is output (S28).

In the QR code generation method of the second embodiment, the light module and the dark module are generated according to the first information, the second information, and the third information, and the module according to the first information at the same position and the second information are generated. The module according to the information is compared with the module according to the third information.
And
(1) When the module according to the first information is bright (white), the module according to the second information is bright (transparent), and the module according to the third information is dark (black) (occurrence probability 12.5% = 1 / 8) a ratio of converting a light (white) module according to the first information to a dark (black) module (error of the first QR code Q1); and a light (transparent) module according to the second information as a dark (black) module The ratio of converting to (the error of the second QR code Q2) and the ratio of not converting the bright (white) module according to the first information (the error of the third QR code QR3) are made uniform.

Accordingly, when the module according to the first information is bright, the module according to the second information is bright (transparent), and the module according to the third information is dark (occurrence probability 12.5% = 1/8), the first QR The error rates of the code Q1, the second QR code Q2, and the third QR code QR3 are generated so as to approximate (+ 12.5 / 3%).

(2) When the module according to the first information is dark (black), the module according to the second information is bright (transparent), and the module according to the third information is bright (white) (occurrence probability 12.5% = 1 / 8), by converting the dark module according to the first information into a light (white) module so as not to increase the overall error rate, the first QR code Q1 in which the first information is recorded has an error, The first QR code Q1 is generated such that the error rate does not exceed the maximum error rate (12.5% + 12.5 / 3% in the above (1)).
(3) When the module according to the first information is light (white), the module according to the second information is dark (black), and the module according to the third information is light (white) (occurrence probability 12.5% = 1 / 8) By converting the dark (black) module according to the second information to the bright (transparent) module so as not to increase the overall error rate, the second QR code Q2 in which the second information is recorded has an error. And the second QR code Q2 is generated such that the error rate does not exceed the maximum error rate (12.5% + 12.5 / 3% in the above (1)).
(4) When the module according to the first information is dark (black), the module according to the second information is dark (black), and the module according to the third information is light (white) (occurrence probability 12.5% = 1 / 8) By converting the light (white) module according to the third information to the dark (black) module so as not to increase the overall error rate, the third QR code QR3 in which the third information is recorded has an error. And the third QR code QR3 is generated such that the error rate does not exceed the maximum error rate (12.5% + 12.5 / 3% in the above (1)).
Thereby, the first QR code Q1 in which the first information is recorded, the second QR code Q2 in which the second information is recorded, and the third QR code QR3 in which the third information is recorded can be read, and The third QR code QR3 can generate a QR code configured by superimposing the second QR code Q2 printed on the transparent film on the first QR code Q1. Further, since the error rates of the first QR code Q1, the second QR code Q2, and the third QR code QR3 are approximated, any two-dimensional code has a low error rate and is easy to read.

[Third embodiment]
A two-dimensional code according to the third embodiment will be described with reference to FIGS. 6 and 7.
In the first embodiment, the dark module is printed on the transparent film 14 with the second QR code Q2, but in the third embodiment, the second QR code Q2 is applied to the transparent film 14 as shown on the right side of FIG. The bright module SW is printed, and the transparent module 14 is placed on the black paper 16 as shown on the left side of FIG. 6B, whereby the bright module and the dark module are formed. 6A shows the third QR code QR3 of the third embodiment, FIG. 6B shows the second QR code Q2, and FIG. 6C shows the first QR code Q1. Here, the third QR code QR3, the second QR code Q2, and the first QR code Q1 are formed to have the same outer diameter, and from one position detection pattern P for cutting out and a module (cell) S in which information is recorded. Become. As in the first embodiment, the two-dimensional code of the third embodiment is a Reed-Solomon code so that the module of the two-dimensional code can be decoded even if there is a code error within a maximum of 30%. An error correction function is provided.

The first QR code Q1 shown in FIG. 6C is printed on, for example, the white paper 12 as in the first embodiment, and the module (S) includes a printed portion (dark) and a non-printed portion (bright). The first QR code Q1 stores character information in English, and can be read in English by an optical information reader. 6B is printed on, for example, the transparent film 14, and the module (S) includes a printed portion (bright) and a non-printed portion (dark: transparent). The second QR code Q2 stores character information in Italian, and can read information in Italian by an optical information reader. The third QR code QR3 shown in FIG. 6A is obtained by attaching the second QR code Q2 to the first QR code Q1 by sticking the transparent film 14 on the white paper 12 on which the first QR code Q1 of FIG. 6C is printed. It is a stack of things. The position detection patterns P of the first QR code Q1 and the second QR code Q2 are the same. On the other hand, the module (S) of the third QR code QR3 is composed of the light module of the second QR code Q2 and the first QR code Q1 light module or dark module that has passed through the non-printed portion (dark: transparent) of the second QR code Q2. . The third QR code QR3 stores character information in Japanese, and the information in Japanese can be read by the optical information reader. In the third embodiment, descriptions of the specifications of a device on which the same content, for example, a two-dimensional code is printed, are made in Japanese, English, and Italian.

The conversion of the light / dark inconsistent portions of the module (cell) S will be described with reference to FIG. The left side in FIG. 7A shows all patterns of cells (modules) of the first QR code Q1, the second QR code Q2, and the third QR code QR3. As shown in the figure, there are 8 patterns of combinations of light (white) / dark (black) of the first QR code Q1 and third QR code QR3 and light (white) / dark (transparent) of the second QR code Q2. The right side in FIG. 7A shows a pattern when the second QR code Q2 is superimposed on the first QR code Q1. When the first QR code Q1-second QR code Q2-third QR code QR3 is white-transparent-black, white-transparent-white and the cell of the third QR code QR3 becomes an error. Similarly, in the case of white-white-black, white-white-white results in a cell of the third QR code QR3, and in the case of black-transparent-white, black-transparent-black results in the third QR code QR3. Cell becomes an error, and in the case of black-white-black, it becomes black-white-white, and the cell of the third QR code QR3 becomes an error. That is, 4 out of 8 patterns are errors in the cell of the third QR code QR3, and the error rate of the third QR code QR3 is 50%, which exceeds the maximum reading rate of 30%.

Therefore, in the third embodiment, as shown in FIG. 7B, when the first QR code Q1-second QR code Q2-third QR code QR3 is white-transparent-black, black-transparent-black is used. 1 QR code Q1 side is assumed to be an error. Similarly, in the case of black-transparent-white, the cell of the first two-dimensional code QR1 is regarded as an error as white-transparent-white. In the case of black-white-black, the cell of the third two-dimensional code QR3 is regarded as an error as black-white-white. Further, in the case of white-white-black, the cell of the third QR code QR3 is regarded as an error as white-white-white. That is, in the first QR code Q1, 2 out of 8 patterns are regarded as errors, and the error rate is adjusted to 25%. Similarly, in the third QR code QR3, an error rate is adjusted to 25% with 2 out of 8 patterns being errors. In the case of black-white-black, the cell of the second two-dimensional code QR2 is regarded as black-transparent-black and the error rate is 25% of the first two-dimensional code cell, and the second two-dimensional code cell 12. It is also possible to adjust 5% and 12.5% of the cells of the third two-dimensional code.

The two-dimensional code generation process in the third embodiment shown in FIG. 7B is the same as that in the first embodiment described above with reference to FIG.

In the two-dimensional code of the third embodiment, each module of the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code should not exceed the maximum error rate of the two-dimensional code. Thus, the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code can be read. Therefore, the third information can be read from the third two-dimensional code obtained by superimposing the first two-dimensional code and the second two-dimensional code, and the second two-dimensional code can be read from the first two-dimensional code. In the peeled state, the second information of the first two-dimensional code and the second information of the second two-dimensional code placed on the colored object can be read.

[Fourth embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIG.
In the third embodiment described above, the error rate of the first QR code Q1 is 25%, and the error rates of the second QR code Q2 and the third QR code QR3 are 12.5%. On the other hand, in the second embodiment, the error rates of the first QR code Q1, the second QR code Q2, and the third QR code QR3 are uniform at 16.6% or approximated to 16.6%.

In the fourth embodiment, as shown in FIG. 8B, when the first QR code Q1-second QR code Q2-third QR code QR3 is black-transparent-white, the first QR code Q1 is white-transparent-white. The ratio of error in the second QR code Q2 for black-white-white and the ratio of error in the third QR code Q3 for black-transparent-black are made uniform. That is, an error rate of +1/24 is uniformly assigned to the first QR code Q1, the second QR code Q2, and the third QR code QR3. Further, similarly to the first embodiment, when white-transparent-black, the cell of the first QR code QR1 is erroneous as black-transparent-black, and when black-white-black is the second QR as black-transparent-black. The cell of the code QR2 is regarded as an error, and in the case of white-white-black, the cell of the third QR code QR3 is regarded as an error as white-white-white. That is, the error rate of each of the first QR code Q1, the second QR code Q2, and the third QR code QR3 is adjusted to 16.6% (1/8 + 1/24). The generation process in the fourth embodiment is the same as that in the second embodiment with reference to FIG.

[Fifth Embodiment]
FIG. 9A shows the third QR code QR3 of the fifth embodiment, FIG. 9B shows the second QR code Q2, and FIG. 9C shows the first QR code Q1. Here, the third QR code Q3, the second QR code Q2, and the first QR code Q1 are formed to have the same outer diameter, and include three position detection patterns P for cutting out and a module (cell) S in which information is recorded. Become. In the fifth embodiment, the second QR code Q2 includes a character SA that is visible to humans. Also in the fifth embodiment, as in the first embodiment, the first QR code Q1 shown in FIG. 9C is printed on, for example, white paper 12, and the module (S) is printed (dark) and non-printed. (Ming). The first QR code Q1 stores character information in English, and can be read in English by an optical information reader. Moreover, the 2nd QR code Q2 shown to FIG. 9 (B) is printed, for example on the transparent film 14, and a module (S) is provided with a printing part (dark) and a non-printing part (bright: transparent). The second QR code Q2 stores character information in Italian, and can read information in Italian by an optical information reader. The third QR code Q3 shown in FIG. 9A is obtained by attaching the second QR code Q2 to the first QR code Q1 by pasting the transparent film 14 on the white paper 12 on which the first QR code Q1 of FIG. 9C is printed. It is a stack of things. The three position detection patterns P of the first QR code Q1 and the second QR code Q2 match. On the other hand, the module (S) of the third QR code QR3 includes the dark module of the second QR code Q2 and the first QR code Q1 bright module or dark module that has passed through the non-printed portion (bright: transparent) of the second QR code Q2. . The third QR code QR3 stores character information in Japanese, and the information in Japanese can be read by the optical information reader.

Also in the fifth embodiment, each module of the first QR code Q1, the second QR code Q2, and the third QR code QR3 does not exceed the maximum error rate of the QR code, so that the first QR code Q1 Each of the second QR code Q2 and the third QR code QR3 can be read. Therefore, the third information (Japanese) can be read from the third QR code QR3 obtained by superimposing the first QR code Q1 and the second QR code Q2 (FIG. 9A), and the first QR code Q1. In the state where the second QR code Q2 is peeled off (FIG. 9B, FIG. 9C), the second information (English) of the first QR code Q1 and the second information (Italian) of the second QR code Q2, respectively. And can be read. In the fifth embodiment, the visible character SA is included on the second QR code Q2 side, but may be included on the first QR code Q1 side.

[Sixth Embodiment]
10A shows the third two-dimensional code QR3 of the sixth embodiment, FIG. 10B shows the second two-dimensional code Q2, and FIG. 10C shows the first two-dimensional code Q1. Yes. Here, in the first to fifth embodiments, the third QR code Q3, the second QR code Q2, and the first QR code Q1 are formed to have the same outer diameter and include the three position detection patterns P. The two-dimensional code of the embodiment is composed of one position detection pattern P having the same shape and a module (cell) S in which information is recorded, and is formed in different outer diameters and shapes.

Also in the sixth embodiment, each module of the first two-dimensional code Q1, the second two-dimensional code Q2, and the third two-dimensional code QR3 should not exceed the maximum error rate of the two-dimensional code. Thus, the first two-dimensional code Q1, the second two-dimensional code Q2, and the third two-dimensional code QR3 can be read. Therefore, the third information (Japanese) can be read from the third two-dimensional code QR3 obtained by superimposing the first two-dimensional code Q1 and the second two-dimensional code Q2 (FIG. 10A), Further, in a state where the second two-dimensional code Q2 is peeled off from the first two-dimensional code Q1 (FIGS. 10B and 10C), the second information (English) of the first two-dimensional code Q1 and The second information (Italian) of the second two-dimensional code Q2 can be read.

In the embodiment described above, an example in which the configuration of the present invention is applied to a QR code and a microcode has been described. However, it goes without saying that the present invention can be applied to various two-dimensional codes capable of error correction.

1A is a plan view showing the third QR code QR3 of the first embodiment, FIG. 1B is a plan view showing the second QR code Q2, and FIG. 1C is a plan view showing the first QR code Q1. FIG. It is explanatory drawing which converts the light / dark mismatching location of the module (cell) S in 1st Embodiment. It is a flowchart which shows the production | generation process of QR Code of 1st Embodiment. It is explanatory drawing which converts the light / dark mismatch location of the module (cell) S in 2nd Embodiment. It is a flowchart which shows the production | generation process of QR Code of 2nd Embodiment. FIG. 6A is a plan view showing a third QR code QR3 of the third embodiment, FIG. 6B is a plan view showing a second QR code Q2, and FIG. 6C is a plan view showing the first QR code Q1. FIG. It is explanatory drawing which converts the light / dark mismatch location of the module (cell) S in 3rd Embodiment. It is explanatory drawing which converts the light / dark mismatch location of the module (cell) S in 4th Embodiment. FIG. 9A is a plan view showing the third QR code QR3 of the fifth embodiment, FIG. 9B is a plan view showing the second QR code Q2, and FIG. 9C shows the first QR code Q1. FIG. FIG. 10A is a plan view showing the third two-dimensional code QR3 of the sixth embodiment, FIG. 10B is a plan view showing the second two-dimensional code Q2, and FIG. It is a top view which shows 1 two-dimensional code Q1.

Explanation of symbols

12 White paper 14 Transparent film 16 Black paper Q1 First QR code (first two-dimensional code)
Q2 Second QR code (second two-dimensional code)
Q3 Third QR code (third two-dimensional code)
P Position detection pattern S Module (cell)

Claims (10)

A first two-dimensional code composed of a light module and a dark module recording the first information, and a second two-dimensional code composed of a transparent module and a dark module printed on a transparent film and recording the second information A two-dimensional code having
The two-dimensional code is transmitted through the dark module of the second two-dimensional code and the transparent module of the second two-dimensional code by superimposing the second two-dimensional code on the first two-dimensional code. A third two-dimensional code comprising a light module or a dark module of the first two-dimensional code,
Each module of the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code has a maximum error rate of an error correction function based on error correction information of each two-dimensional code. A two-dimensional code characterized in that the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code can be read by adjusting so as not to exceed each other. A first two-dimensional code composed of a light module and a dark module on which first information is recorded, and a second two-dimensional code composed of a transparent module and a light module printed on a transparent film and recorded on the second information A two-dimensional code having
The two-dimensional code is transmitted through the light module of the second two-dimensional code and the transparent module of the second two-dimensional code by superimposing the second two-dimensional code on the first two-dimensional code. A third two-dimensional code comprising a light module or a dark module of the first two-dimensional code,
Each module of the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code has a maximum error rate of an error correction function based on error correction information of each two-dimensional code. A two-dimensional code characterized in that the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code can be read by adjusting so as not to exceed each other. 3. The two-dimensional code according to claim 1, wherein error rates of the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code are approximated. A first two-dimensional code composed of a light module and a dark module recording the first information, and a second two-dimensional code composed of a transparent module and a dark module printed on a transparent film and recording the second information A two-dimensional code generation method,
In the two-dimensional code, the first two-dimensional code and the second two-dimensional code are obtained by superimposing the second two-dimensional code printed on a transparent film on the first two-dimensional code. A third two-dimensional code having third information configured by:
A storage step for storing the first information, the second information, and the third information; and according to the first information, the second information, and the third information, any of the modules Module generation step to generate
A comparison step of comparing a module according to the first information in the same position, a module according to the second information, and a module according to the third information;
In the module according to the first information, the module according to the second information, and the module according to the third information, the combination increases the error rate of the first information, and the error rate of the third information If one of the modules according to the first information is converted into the other module by a first predetermined ratio, an error occurs in the first information, and the first information is reduced. The first predetermined ratio so as not to exceed a maximum error rate of an error correction function based on error correction information each of the two-dimensional code, the second two-dimensional code, and the third two-dimensional code. A first two-dimensional code generation step for setting and generating the first two-dimensional code;
In the module according to the first information, the module according to the second information, and the module according to the third information, the combination increases the error rate of the second information, and the error rate of the third information If one of the modules according to the second information is converted into the other module by a second predetermined ratio, an error occurs in the second information and the first information is reduced. The second predetermined ratio is set so as not to exceed a maximum error rate of an error correction function based on error correction information each of the two-dimensional code, the second two-dimensional code, and the third two-dimensional code. A second two-dimensional code generation step for setting and generating the second two-dimensional code;
A two-dimensional code output step of outputting the first two-dimensional code and the second two-dimensional code;
A method for generating a two-dimensional code, comprising: The first two-dimensional code generation step includes:
When the module according to the first information is a light module, the module according to the second information is a transparent module, and the module according to the third information is a dark module, at least the light module according to the first information is changed to a dark module. Converting by a ratio of 1;
When the module according to the first information is a dark module, the module according to the second information is a transparent module, and the module according to the third information is a light module, at least the dark module according to the first information is a light module. Converting to a second proportion to
The first two-dimensional code, the second two-dimensional code, and the third two-dimensional code each of the first two-dimensional code so as not to exceed a maximum error rate of an error correction function based on error correction information. Generating the first two-dimensional code by setting the first predetermined ratio comprising a ratio and the second ratio;
The two-dimensional code generation method according to claim 4, further comprising: The second two-dimensional code generation step includes:
When the module according to the first information is a light module, the module according to the second information is a transparent module, and the module according to the third information is a dark module, at least the transparent module according to the second information is changed to a dark module. Converting by a ratio of 3;
When the module according to the first information is a light module, the module according to the second information is a dark module, and the module according to the third information is a light module, at least the dark module according to the second information is changed to a transparent module. Converting by a ratio of 4;
The third two-dimensional code, the second two-dimensional code, and the third two-dimensional code each of the third two-dimensional code so as not to exceed a maximum error rate of an error correction function based on error correction information that each has. Generating the second two-dimensional code by setting the second predetermined ratio consisting of a ratio and the fourth ratio;
The two-dimensional code generation method according to claim 4, further comprising: 7. The method according to any one of claims 4 to 6, wherein the first two-dimensional code, the second two-dimensional code, and the third two-dimensional code are generated so as to approximate error rates. Or a method for generating a two-dimensional code. A first two-dimensional code composed of a light module and a dark module on which first information is recorded, and a second two-dimensional code composed of a transparent module and a light module printed on a transparent film and recorded on the second information A two-dimensional code generation method,
In the two-dimensional code, the first two-dimensional code and the second two-dimensional code are obtained by superimposing the second two-dimensional code printed on a transparent film on the first two-dimensional code. A third two-dimensional code having third information configured by:
A storage step for storing the first information, the second information, and the third information; and according to the first information, the second information, and the third information, any of the modules Module generation step to generate
A comparison step of comparing a module according to the first information in the same position, a module according to the second information, and a module according to the third information;
In the module according to the first information, the module according to the second information, and the module according to the third information, the combination increases the error rate of the first information, and the error rate of the third information If the module according to the first information is converted into the other module by a third predetermined ratio, an error occurs in the first information, and the first two The first two-dimensional code by setting the third predetermined ratio so as not to exceed a maximum error rate of an error correction function based on error correction information each of the dimension code and the third two-dimensional code. A first two-dimensional code generation step for generating
A second two-dimensional code generation step for generating a second two-dimensional code based on the module generated in the module generation step;
A two-dimensional code output step of outputting the first two-dimensional code and the second two-dimensional code;
A method for generating a two-dimensional code, comprising: The first two-dimensional code generation step includes:
When the module according to the first information is a light module, the module according to the second information is a transparent module, and the module according to the third information is a dark module, at least the light module according to the first information is changed to a dark module. Converting by a ratio of 5;
When the module according to the first information is a dark module, the module according to the second information is a transparent module, and the module according to the third information is a light module, at least the dark module according to the first information is a light module. Converting by a ratio of 6;
When the module according to the first information is a light module, the module according to the second information is a light module, and the module according to the third information is a dark module, at least the light module according to the first information is a dark module. Converting by a ratio of 7;
When the module according to the first information is a dark module, the module according to the second information is a light module, and the module according to the third information is a light module, at least the dark module according to the first information is a light module. The step of converting by a ratio of 8, and the fifth error rate so as not to exceed a maximum error rate of an error correction function based on error correction information each of the first two-dimensional code and the third two-dimensional code. Generating the first two-dimensional code by adjusting the third predetermined ratio comprising the ratio, the sixth ratio, the seventh ratio, and the eighth ratio;
The method for generating a two-dimensional code according to claim 8, further comprising: 10. The two-dimensional code generation method according to claim 8, wherein the two-dimensional code is generated so as to approximate an error rate between the first two-dimensional code and the third two-dimensional code.

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