JP2017167626A - Information code reading device, information code generation method, and information code display medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress, after reading of an information code failed, reading of an information code different from the information code whose reading has failed.SOLUTION: An information code reading device (30) comprises: an imaging part (32) capable of imaging an information code (50) displayed by a medium; a code reading part (34) capable of reading the information code imaged by the imaging part; an output part (35) capable of outputting a reading result of the information code read by the code reading part; and a control part (31) for controlling the imaging part, the code reading part, and the output part. The information code includes: general information (56) to be recorded; and unique information (57) uniquely set for the general information. The control part is configured to, when the code reading part succeeds in reading of the unique information, and fails in reading of the general information, control the code reading part not to read the general information with respect to the information code having unique information different from the unique information whose reading has succeeded.SELECTED DRAWING: Figure 5

Description

  Embodiments described herein relate generally to an information code reader, an information code generation method, and an information code display medium.

  There is an information code reader that can read an information code such as a bar code or a QR code (registered trademark) and output the read result. In recent years, it has been proposed to incorporate the information code reader into a ticket gate for managing visitors, for example, at stations, airports, event venues, and the like. For example, when a user puts a ticket on which an information code such as a boarding ticket or an admission ticket is displayed on the information code reading device, the information code reading device reads the information code displayed on the ticket or the like. The information code reading device acquires data from the read information code, and notifies the acquired data to an external device of the information code reading device, for example, a control device of the ticket gate.

  However, when a part of the information code is hidden by the user's finger or the like holding the ticket, or when only a part of the information code enters the reading field of the information code reading device, the information code reading device The information code may not be read normally from a defaced ticket. The conventional information code reading device is unresponsive when the information code cannot be read despite the fact that the ticket or the like is worn. In this case, the information code reader cannot notify the control device of the ticket gate or the user of the information code reading abnormality, for example. As a result, the operation of the ticket gate is temporarily stopped, and it becomes difficult for the user to determine whether the reading of the information code has been normally executed.

  In such a conventional configuration, for example, the following problems may occur when a plurality of users pass through the ticket gate in succession. That is, if reading of the information code for the voucher or the like worn by the previous user fails, the information code reading device does not respond and the operation of the ticket gate is temporarily stopped. In this case, if the previous user does not notice that the reading of the information code has failed, the previous user proceeds further while the ticket gate is temporarily stopped. Then, when a user who came later after the previous user picks up a ticket or the like with respect to the restored information code reading device, the information code reading device displays an information code such as a ticket or the like that the subsequent user has deceived. Will be read. In this case, the information code reading device outputs the read result without distinguishing whether the read information code is for the voucher that the previous user has deceived or for the voucher that the subsequent user has deceived. Then, the ticket gate passes the previous user by the information code that the voucher or the like worn by the subsequent user has. In this case, since the previous user has already passed through the ticket gate, there may occur a situation in which a user who comes later cannot pass through the ticket gate.

JP 2013-191018 A

  Therefore, an information code reading device that can suppress reading an information code different from the information code that failed to be read after the information code reading has failed, and an information code that can be read by the information code reading device. An information code generation method for generating the information code and an information code display medium on which the information code is displayed are provided.

An information code reading apparatus according to an embodiment includes an imaging unit capable of imaging an information code displayed on a medium, a code reading unit capable of reading the information code captured by the imaging unit, and the code reading unit. An output unit capable of outputting the read result of the read information code, and a control unit for controlling the imaging unit, the code reading unit, and the output unit. The information code includes general information to be recorded and unique information set uniquely for the general information. The control unit, when the code reading unit succeeds in reading the unique information and fails to read the general information, the information code having the unique information different from the unique information that has been successfully read. The code reading unit is controlled so as not to read general information.
In the information code generation method according to the embodiment, a function pattern having a preset shape and encoded general information are arranged inside a predetermined code area, and specific to the general information inside or around the code area. An information code is generated by arranging the set encoded unique information.
The information code generated by the information code generation method is displayed on the information code display medium according to the embodiment.

The block diagram which shows notionally a structure about an example of the information code system by 1st Embodiment The figure which shows the content of the information code conceptually about 1st Embodiment The figure which shows an example of a structure of specific information about 1st Embodiment (the 1) FIG. 2 is a diagram conceptually illustrating an example of the configuration of unique information in the first embodiment (part 2) The figure which shows an example of the encoded information code about 1st Embodiment Flowchart showing the content of information code reading processing performed by the control unit of the information code reading device in the first embodiment (part 1) Flowchart showing the content of the information code reading process performed by the control unit of the information code reading device in the first embodiment (No. 2) The figure which shows the relationship between the control state in the control part of an information code reader, and the data output from an output part about 1st Embodiment (the 1) Flowchart (part 1) showing the contents of the information code reading process performed by the control unit of the information code reading device in the second embodiment Flowchart showing the content of information code reading processing performed by the control unit of the information code reading device in the second embodiment (part 2) The flowchart which mainly shows a different part from FIG. 6 or FIG. 9 among the contents of the information code reading process performed in the control part of an information code reading apparatus about 3rd Embodiment. The flowchart which mainly shows a different part from FIG. 7 or FIG. 10 among the contents of the information code reading process performed in the control part of an information code reading device about 3rd Embodiment. The figure which shows the relationship between the control state in the control part of an information code reader, and the data output from an output part about 3rd Embodiment (the 1) The figure which shows the relationship between the control state in the control part of an information code reader, and the data output from an output part about 3rd Embodiment (the 2) The figure which shows the relationship between the control state in the control part of an information code reader, and the data output from an output part about 3rd Embodiment (the 3) The figure which shows an example of the encoded information code about 4th Embodiment

  Hereinafter, a plurality of embodiments will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the substantially same element in each embodiment, and description is abbreviate | omitted.

(First embodiment)
First, a first embodiment will be described with reference to FIGS.
The information code system 10 of this embodiment includes an information code generation device 20, an information code reading device 30, and an external device 40. The information code system 10 can be used for, for example, a ticketing and ticket gate system for managing visitors at a station, airport, event venue, or the like. In this case, for example, the external device 40 is a ticket gate, and the information code generation device 20 is a ticket issuing machine. The information code reading device 30 is, for example, a code reader incorporated in a ticket gate, that is, the external device 40. The information code system 10 is not limited to ticketing and ticket gate systems, and can be applied to other uses. Further, the information code reading device 30 does not need to be incorporated in the external device 40.

[Information code generator]
Hereinafter, the information code generation device 20 will be described with reference to FIGS. The information code generation device 20 generates the information code 50 shown in FIG. 1 or 5 and displays the information code 50 on the information code display medium 60. The information code 50 includes, for example, a stack type or matrix type two-dimensional code. For example, the information code generation device 20 has a function of generating a two-dimensional code and a one-dimensional code. In the case of this embodiment, the information code generation device 20 has a function of generating a QR code and a barcode. The information code 50 generated by the information code generation device 20 is not limited to a QR code and a barcode.

  The information code display medium 60 on which the information code 50 is displayed is, for example, a paper or resin sheet-like medium, or an electronic device having a display screen such as a liquid crystal screen, such as a smartphone. In this case, “displaying the information code 50 on the information code display medium 60” means displaying the information code 50 on the information code display medium 60 so that it can be recognized from the appearance. That is, “to display the information code 50” means that, for example, when the information code display medium 60 is a paper medium, the information code 50 is printed on the paper medium. Means that the information code 50 is displayed on the screen of the electronic device. In the case of this embodiment, the information code generation device 20 has a function of printing the information code generated by the information code generation device 20 on a medium. Therefore, the information code generation device 20 also serves as a printing device for printing the information code generated by the information code generation device 20 on a medium.

  The information code generation device 20 includes a control unit 21, a general information acquisition unit 22, a unique information generation unit 23, an encoding unit 24, and a printing unit 25. The control unit 21 is mainly composed of a microcomputer having, for example, a CPU 211, a storage area 212 such as a ROM, a RAM, a rewritable flash memory, a timer (not shown), and the like. Control. The storage area 212 stores an information code generation program. The control unit 21 executes the information code generation program in the CPU 211 to virtually realize the general information acquisition unit 22, the unique information generation unit 23, the encoding unit 24, and the like by software. Note that the general information acquisition unit 22, the unique information generation unit 23, and the encoding unit 24 may be realized in hardware as an integrated circuit integrated with the control unit 21, for example.

  The information code 50 generated by the information code generation device 20 includes general information 56 and unique information 57 as shown in FIG. The general information 56 is information to be encoded, that is, information to be recorded. For example, when the information code system 10 is used in a ticket gate system at a station, the general information 56 is information such as a train number, a seat number, a boarding place, a getting-off place, a ticketing date and time, and a charge. The unique information 57 is information accompanying the general information 56 and is unique to the general information 56. That is, the unique information 57 is linked to the general information 56, and even if there are a plurality of information codes 50, the general information 56 and the unique information 57 for each information code 50 are in principle one-to-one. It has become a relationship.

  The information code generation device 20 is connected to a host computer higher than the information code generation device 20 via, for example, a communication line (not shown). The general information acquisition unit 22 has a function of acquiring general information 56 from a host computer (not shown).

  As illustrated in FIG. 2, the unique information generation unit 23 generates unique information 57 unique to the general information 56 acquired by the general information acquisition unit 22. The unique information generation unit 23 generates unique information 57 using, for example, a BCH code having 11 bits for code and 1 bit for error correction. In this case, the unique information generation unit 23 can generate 2 ^ 11 = 2048 kinds of unique information 57. The probability that the same unique information 57 is generated is 1 / (2048) ^ 2. Therefore, it can be said that the probability that the same unique information 57 is generated is extremely low.

  As illustrated in FIG. 3, the unique information generation unit 23 has a function of generating unique information 57 using, for example, random numbers. That is, in this case, the unique information 57 is configured by a random number 571. For example, when the information code system 10 includes a plurality of information code generators 20, each information code generator 20 has a different random number table.

  Further, as shown in FIG. 4, for example, the unique information generation unit 23 sets 3 bits of 11 bits as the device identifier 572 and sets the remaining 8 bits by the printing device, that is, the information code generation device 20. It is set as a serial number 573 indicating the order of printing. That is, in this case, the unique information is configured by the device identifier 572 and the serial number 573.

  For example, when the information code system 10 includes eight information code generation devices 20, device identifiers 572 of 0 to 7 are assigned to each information code generation device 20. The unique information generation unit 23 adds the serial number 573 to the device identifier 572 to generate the unique information 57. In this case, the serial number 573 means the number of unique information 5 7 generated from the start of use of the information code generator 20 to the present. The unique information 57 generated by the unique information generating unit 23 is not limited to the above-described information. For example, the number of bits of the unique information 57 may be greater than or less than 11 bits. Further, the unique information 57 is not limited to the information including the random number 561, the device identifier 572, and the serial number 573, and may include other elements.

  The encoding unit 24 illustrated in FIG. 1 has a function of generating a two-dimensional code by encoding, or encoding, the general information 56 acquired by the general information acquisition unit 22 and the specific information 57 generated by the specific information generation unit 23. In the case of the present embodiment, the encoding unit 24 encodes the general information acquired by the general information acquisition unit 22 and the specific information generated by the specific information generation unit 23 to generate a QR code 50 as shown in FIG. .

  The printing unit 25 shown in FIG. 1 prints the information code 50 encoded by the encoding unit 24, that is, the general information 56 and the unique information 57 on an information code display medium 60 such as a ticket. The printing unit 25 may be built in the information code generation device 20 or may be provided outside the information code generation device 20. The information code generation device 20 includes a communication unit that can communicate with the electronic device instead of the printing unit 25 in order to display the information code 50 generated by the information code generation device 20 on an electronic device such as a smartphone. Also good.

[Information code]
Hereinafter, details of the information code 50 will be described with reference to FIG. The information code 50 has a plurality of cells 511 formed by dividing the inside of a predetermined code area 51 into a lattice shape. Each cell 511 is arranged two-dimensionally or planarly in the code area 51. The code area 51 is an area including all the cells 511 constituting the information code 50, and is, for example, a rectangular area. In the case of this embodiment, the code area 51 is a square area including 21 × 21 cells 511. Note that the size of the code area 51, that is, the size of the information code 50 is not limited to that described above, and can be appropriately changed depending on the capacity of the general information 56. Each cell 511 is displayed in, for example, a white bright color or a black dark color.

  The information code 50 is, for example, a QR code, and has a configuration conforming to JISX0510. In this case, the information code 50 includes position detection patterns 521 to 523, a timing pattern 53, separation patterns 541 to 543, and an encoding area 55. The position detection patterns 521 to 523 and the timing pattern 53 are function patterns having a preset shape. That is, the position detection patterns 521 to 523 and the timing pattern 53 are set in a fixed shape regardless of the contents of the general information 56 and the unique information 57.

  In the case of the present embodiment, three position detection patterns 521 to 523 are arranged at corners including three vertices of the square code region 51, respectively. In this case, of the three position detection patterns 521 to 523, two position detection patterns 521 and 522 arranged on the diagonal line in the rectangular shape of the code area 51 are respectively referred to as a first position detection pattern 521 and a second position detection pattern. The remaining position detection pattern 523 is referred to as a third position detection pattern 523. The timing pattern 53 is arranged in the encoding area 55.

  The separation patterns 541 to 543 are patterns for separating the position detection patterns 521 to 523 and the coding region 55, and are all configured in light color, that is, white. In this case, the separation pattern 541 for separating the first position detection pattern 521 and the coding region 55 is referred to as a first separation pattern 541. The separation pattern 542 for separating the second position detection pattern 522 and the coding region 55 is referred to as a second separation pattern 542. A separation pattern 543 for separating the third position detection pattern 523 and the coding region 55 is referred to as a third separation pattern 543.

  In the encoding area 55, encoded general information 56 and unique information 57 are arranged. In FIG. 5, the encoded general information 56 and unique information 57 are not displayed for convenience of explanation. However, in practice, each cell 511 in the encoding area 55 is displayed in light or dark color according to the encoded general information 56 and unique information 57. The unique information 57 is arranged adjacent to the separation pattern 54 in the coding area 55. In the information code 50, the unique information 57 may be arranged in only one place, but it is preferable that the unique information 57 having the same contents is arranged in at least two places. Therefore, the unique information 57 having the same content may be distributed in three or more places.

  In the case of the present embodiment, the unique information 57 having the same content is arranged in two locations. Specifically, the encoding area 55 has a first unique information area 551 and a second unique information area 552. In this case, in FIG. 5, among the cells 511 in the coding area 55, the part indicated by the right-down oblique line is the cell 511 of the first unique information area 551, and the part indicated by the left-down oblique line is the first This is the cell 511 of the second unique information area 552. In the first unique information area 551 and the second unique information area 552, unique information 57 having the same content is arranged.

  In this case, the first unique information area 551 is provided separately in two. A portion of the first unique information region 551 is provided adjacent to a portion of the first separation pattern 541 that does not face the third position detection pattern 523. The remaining portion of the first unique information area 551 is provided adjacent to a portion of the second separation pattern 542 that does not face the third position detection pattern 523. The second unique information region 552 is provided adjacent to the entire third separation pattern 543. Also, the encoded general information 56 is arranged in an area other than the unique information areas 551 and 542 in the encoding area 55.

[Information code reader]
Hereinafter, the information code reader 30 will be described with reference to FIG. The information code reader 30 reads the information code 50 displayed on the information code display medium 60 and decodes, that is, decodes the read information code 50. Then, the information code reading device 30 transmits the reading result, that is, the decoded code data to the external device 40. In this case, the information code reader 30 has a function of reading a two-dimensional code and a one-dimensional code. In the case of the present embodiment, the information code reader 30 has a function of reading a QR code and a barcode. Note that the information code 50 read by the information code reader 30 is not limited to a QR code and a barcode.

  The information code reading device 30 includes a control unit 31, an imaging unit 32, a communication unit 33, a code reading unit 34, an output unit 35, and a receiving unit 36. The control unit 31 is mainly composed of a microcomputer having, for example, a CPU 311, a storage area 312 such as a ROM, a RAM, a rewritable flash memory, and a timer (not shown), and the entire information code reader 30 is configured. Control. The storage area 312 stores an information code reading program. The control unit 31 executes the information code reading program in the CPU 311 to virtually realize the code reading unit 34, the output unit 35, the receiving unit 36, and the like by software. The code reading unit 34, the output unit 35, and the receiving unit 36 may be realized in hardware as an integrated circuit integrated with the control unit 31, for example.

  The imaging unit 32 is a CCD camera or the like, for example, and has a function of imaging the information code 50 displayed on the information code display medium 60. The control unit 31 can acquire the information code 50 displayed on the information code display medium 60 by acquiring the visible light or the invisible light reflected from the information code display medium 60 by the imaging unit 32. Further, the control unit 31 has a function of detecting that the information code display medium 60 has been deceived by the imaging unit 32 based on the brightness or darkness of the captured image by the imaging unit 32. The control unit 31 may detect that the information code display medium 60 has been tampered with using another sensor such as a proximity sensor. When the user places the information code display medium 60 over the imaging unit 32, the control unit 31 acquires the information code 50 displayed on the information code display medium 60 from the image captured by the imaging unit 32.

  The communication unit 33 is an interface for transmitting / receiving data to / from the external device 40. The communication unit 16 is connected to the external device 40 wirelessly or by wire. The code reading unit 34 has a function of scanning the image captured by the imaging unit 32, decoding the information code 50, and reading the content of the information code 50. For example, when the code reading unit 34 detects the position detection patterns 521 to 523 illustrated in FIG. 5, the code reading unit 34 decodes the general information 56 and the unique information 57 in the encoding region 55. The output unit 35 has a function of outputting the content of the information code 50 read by the code reading unit 34, that is, code data or the like, to the external device 40 via the communication unit 33. The receiving unit 36 has a function of receiving a command from the external device 40 via the communication unit 33.

[Information code reading process]
Below, with reference to FIG.6 and FIG.7, the information code reading process performed by the control part 31 of the information code reader 30 is demonstrated. In the following description, the words in parentheses indicate the contents of the flowchart corresponding to the words immediately before the parentheses. Further, “FP” written in step S14 in FIG. 6 is an abbreviation of finder pattern, and means position detection patterns 521 to 523. In the following processing, one fixed value To and three variables T, ID0, and IDx are set. The variable T is a variable indicating the time since the timer was activated. The control unit 31 starts timing by the timer when the unique information 57 is successfully read for the first time after the information code reading process is started (start of FIG. 6).

  The fixed value To defines the upper limit of the variable T and is a preset value. The variable ID0 is for indicating the value of the unique information 57 read for the first time after the execution of the information code reading process is started (start of FIG. 6). The variable IDx is for indicating the value of the latest unique information 57 among the unique information 57 read after the start of execution of the information code reading process (start of FIG. 6). In the following description, the variable T is referred to as a count time T, the fixed value To is referred to as a timeout time To, the variable ID0 is referred to as an initial value ID0, and the variable IDx is referred to as a current value IDx.

  In the present embodiment, when the code reading unit 34 succeeds in reading the unique information 57 and fails in reading the general information 56, the control unit 31 includes information having unique information 57 different from the unique information 57 that has been successfully read. For the code 50, the code reading unit 34 is controlled so as not to read the general information 56.

  Specifically, when the information code reading process is started (start of FIG. 6), the control unit 31 performs initial setting in step S11. When executing the initial setting, the control unit 31 sets the count time T, the initial value ID0, and the current value IDx to 0. Next, in step S12, the control unit 31 determines whether or not the count time T has reached the timeout time To. When the count time T is equal to or longer than the timeout time To (NO in step S12), the control unit 31 ends the information code reading process (end in FIG. 7). On the other hand, if the count time T is less than the timeout time To (YES in step S12), the control unit 31 shifts the process to step S13.

  In step S <b> 13, the control unit 31 performs image acquisition and scanning of the information code 50 using the imaging unit 32 and the code reading unit 34. When the position detection patterns 521 to 523 are not detected as a result of the process in step S13 (NO in step S14), the control unit 31 shifts the process to step S12. On the other hand, when the position detection patterns 521 to 523 are detected (YES in step S14), the control unit 31 proceeds to step S15 and tries to read the unique information 57 from the information code 50.

  If the reading of the unique information 57 has failed (NO in step S16), the control unit 31 shifts the process to step S12. On the other hand, when the reading of the unique information 57 is successful (YES in step S16), the control unit 31 shifts the process to step S17. Then, the control unit 31 sets the current value IDx to the value of the unique information 57 read in step S15. Then, the control part 31 transfers a process to step S18 of FIG.

  In step S18 of FIG. 7, the control unit 31 determines whether or not the timer is operating. That the timer is stopped means that the unique information 57 read in step S15 in FIG. 6 is the unique information 57 read for the first time after the information code reading process is started (start in FIG. 6). To do. Therefore, if the timer is stopped (NO in step S18), the control unit 31 proceeds to step S19 and starts the timer. And the control part 31 transfers a process to step S20, and sets initial value ID0 to present value IDx. Then, the control part 31 transfers a process to step S22.

  On the other hand, the fact that the timer is operating in step S18 means that steps S19 and S20 have already been executed. That is, the fact that the timer is operating in step S18 means that the unique information 57 read in step S15 in FIG. 6 is read for the first time after the information code reading process is started (start in FIG. 6). That is, it means that the unique information 57 is read after the second time. Therefore, when the timer is operating (YES in step S18), the control unit 31 proceeds to step S21 to determine whether or not the current value IDx is equal to the initial value ID0.

  The fact that the current value IDx does not match the initial value ID0 in step S21 means that the unique information 57 detected after the second time is different from the unique information 57 detected first, that is, the information code acquired first. 50 and the currently acquired information code 50 are different. In other words, it means that the information code display medium 60 currently deceived by the imaging unit 32 is different from the information code display medium 60 deceived first. Therefore, if the current value IDx and the initial value ID0 do not match (NO in step S21), the control unit 31 determines that an information code display medium 60 that is different from the information code display medium 60 that was initially deceived has been deceived. . And the control part 31 transfers a process to step S12 of FIG. 6, without reading the general information 56 in step S22.

  On the other hand, the fact that the current value IDx matches the initial value ID0 in step S21 means that the unique information 57 detected after the second time and the unique information 57 detected first are the same, that is, acquired first. This means that the information code 50 and the currently acquired information code 50 are the same. In other words, it means that the information code display medium 60 currently deceived by the imaging unit 32 is the same as the information code display medium 60 initially deceived. Therefore, when the current value IDx and the initial value ID0 match (YES in step S21), the control unit 31 re-enters the same information code display medium 60 as the information code display medium 60 initially defaced. The process proceeds to step S22.

  Then, in step S <b> 22, the control unit 31 reads the general information 56 arranged in the encoding area 55 by the code reading unit 34. Next, in step S23, the control unit 31 determines whether or not the general information 56 has been successfully read in step S22. When the reading of the general information 56 fails (NO in step S23), the control unit 31 shifts the process to step S12 in FIG. 6 and repeats the processes in steps S12 to S23 again.

  On the other hand, when the reading of the general information 56 is successful (YES in step S23), the control unit 31 shifts the process to step S24. In step S <b> 24, the control unit 31 outputs the reading result by the output unit 35 and transmits the reading result to the external device 40 via the communication unit 37. In this case, as shown in FIG. 8, immediately after the reading of the general information by the code reading unit 34 is successful (YES in step S23 of FIG. 7), the control unit 31 displays the general information 56 and the unique information 57 as the reading results. Output (step S24 in FIG. 7). The numbers given to the upper part of the “reading state” arrow in FIG. 8 mean the step numbers in FIGS. 6 and 7. And the control part 31 complete | finishes an information code reading process (end of FIG. 7). The external device 40 that has received the reading result from the information code reading device 30 performs processing according to the reading result.

  According to the embodiment described above, the information code reading device 30 includes the imaging unit 32, the code reading unit 34, the output unit 35, and the control unit 31. The imaging unit 32 can image the information code 50 displayed on the information code display medium 60. The code reading unit 34 can read the information code 50 imaged by the imaging unit 32. The output unit 35 can output the reading result of the information code 50 read by the code reading unit 34. The control unit 31 controls the imaging unit 32, the code reading unit 34, and the output unit 35. The information code 50 includes general information 56 to be recorded and unique information 57 that is set uniquely for the general information 56.

  Then, after the code reading unit 34 detects the position detection patterns 521 to 523 (YES in step S14), the code reading unit 34 successfully reads the unique information 57 (YES in step S16 in FIG. 6). If the general information 56 has been successfully read (YES in step S23 of FIG. 7), the reading result is output (step S24). On the other hand, after the code reading unit 34 detects the position detection patterns 521 to 523 (YES in step S14), the code reading unit 34 successfully reads the unique information 57 (YES in step S16 in FIG. 6). If the reading of the general information 56 fails (NO in step S23 of FIG. 7), the code reading is performed so that the general information 56 is not read for the information code 50 having the unique information 57 different from the unique information 57 that has been successfully read. The unit 34 is controlled (NO in step S21 in FIG. 7).

  According to this, reading of the general information 56 fails for the information code 50 that is initially deceived (step S23 in FIG. 7), and then another information code is read without reading the general information 56 of the first information code 50. When the display medium 60 is wrinkled (YES in step S21 in FIG. 7), the following effects are obtained. That is, the information code 50 has unique information 57 unique to the general information 56. Therefore, in this case, the unique information 57 included in the information code 50 that is cheated later does not match the unique information 57 included in the information code 50 that is cheated first. Therefore, the control unit 31 controls the code reading unit 34 so as not to read the general information 56 of the information code 50 that is cheated later. Accordingly, it is possible to prevent reading of the general information 56 of the information code 50 different from the information code 50 that has failed to be read after the information code 50 has failed to read the general information 56. As a result, for example, in the case where the information code reading device 30 is incorporated in the ticket gate, even when a plurality of users pass through the ticket gate continuously, the ticket gate can be detected by the information code 50 deceived by the subsequent user. The situation of passing the previous user can be suppressed.

  When the code reading unit 34 has successfully read the unique information 57 (YES in step S16 in FIG. 6) and has failed to read the general information 56 (NO in step S23 in FIG. 7), the control unit 31 performs a predetermined period of time. Until T0 elapses (YES in step S12 in FIG. 6), the code reading unit 34 is controlled so that the general information 56 is not read for the information code 50 having the unique information 57 different from the unique information 57 that has been successfully read. . According to this, even if the information code reading device 30 fails to read the general information 56, the reading process can be continued by the information code reading device 30 alone. Therefore, an increase in processing by the external device 40 can be suppressed, and as a result, the load on the external device 40 can be suppressed.

  In the information code generation method according to the above embodiment, as shown in FIG. 5, function patterns 521 to 523, 53 having a preset shape and encoded general information 56 are arranged inside a predetermined code area 51. At the same time, the encoded information 51 is arranged in the code area 51 to generate the information code 50. According to this, for example, the information code 50 having the unique information 57 can be easily generated without greatly changing the configuration of the conventional QR code.

  Here, for example, when the unique information 57 is set by a random number, there is a possibility that the same unique information 57 is accidentally issued to different general information 56 although it is extremely rare. Therefore, in this case, the possibility that the same unique information 57 is generated is allowed, or the unique information 57 generated in the past by the information code generation device 20 that generates the unique information 57 and the newly generated unique information 57, and if they match, processing such as regenerating the unique information 57 is required. When the latter processing is performed, if the information code generation device 20 is a printing device and there are a plurality of printing devices, it is necessary to share the unique information 57 generated in the past between the printing devices. As a result, communication between the plurality of information code generation devices 20 is required, and the entire system becomes complicated.

  Therefore, in the information code generation method according to the above embodiment, the unique information 57 may include a device identifier 572 and a serial number 573. The device identifier 572 is an identifier for identifying the printing device 20 that prints the information code 50 on the information code display medium 60, in this case, the information code generation device 20. The serial number 573 is a number indicating the order of printing by the printing apparatus 20. According to this, even when there are a plurality of printing devices, that is, information code generation devices 20, at least the device identifiers 572 are different among the information code generation devices 20, and therefore the same among the information code generation devices 20. The unique information 57 is not generated. Therefore, the generation of the unique information 57 can be managed by the information code generation device 20 alone without performing communication between the information code generation devices 20, and as a result, it is possible to prevent the entire system from becoming complicated.

  In the information code generation method according to the above embodiment, the function patterns 521 to 523, the general information 56, and the unique information 57 are configured by a two-dimensional code. According to this, since the unique information 57 can be included in, for example, a conventional QR code, the information code 50 including the unique information 57 can be easily generated.

  In this case, the two-dimensional code constituting the information code 50 is a QR code. In the information code generation method, the unique information 57 is arranged adjacent to the separation patterns 541 to 543 that separate the coding area 55 and the position detection patterns 521 to 523 in the coding area 55. That is, the unique information 57 is arranged in the vicinity of the position detection patterns 521 to 523. According to this, even if a part of the information code 50 is hidden by the user's finger or the like, if the position detection patterns 521 to 523 are detected, the information code 50 is arranged in the vicinity of the position detection patterns 521 to 523. The unique information 57 is easily detected at the same time. Therefore, it is possible to improve the probability that at least the unique information 57 of the information code 50 is normally read.

  In the information code generation method according to the above embodiment, the unique information 57 having the same content is arranged in at least two places. In other words, in the above-described embodiment, the unique information 57 having the same content is distributed and arranged in two places of the first unique information area 551 and the second unique information area 552 in the encoding area 55. According to this, the information code reading device 30 can read the other unique information 57 even when the one unique information 57 is hidden by the user's finger or the like. Accordingly, it is possible to further improve the probability that at least the unique information 57 of the information code 50 is normally read.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS.
In the second embodiment, the control unit 31 executes the information code reading process shown in FIGS. 9 and 10. The information code reading process shown in FIGS. 9 and 10 has steps S31 and S32 shown in FIG. 9 and step S33 shown in FIG. 10 instead of step S12 in FIG. 6 and steps S18 and 19 in FIG. ing.

  That is, the control unit 31 starts execution of the information code reading process (start of FIG. 9) and performs initial setting (step S11). In step S31, the control unit 31 determines whether or not the initial value ID0 is zero. When the initial value ID0 is 0, it means that step S20 in FIG. 10 has not yet been executed from the start of the information code reading process to the present, that is, the unique information 57 has not been read. . In other words, if the initial value ID0 is a value different from 0, it means that steps S20 to S23 have already been executed. That is, if the initial value ID0 is a value different from 0, the unique information 57 has already been successfully read from the start of the information code reading process to the present (YES in step S16 in FIG. 9), and This means that reading of the general information 56 has failed (NO in step S23 in FIG. 10).

  When the initial value ID0 is a value different from 0 in step S31 of FIG. 9 (NO in step S31), the control unit 31 executes steps S13 to S17 as in the first embodiment, and then the steps of FIG. The process proceeds to S33. Then, in step S33, the control unit 31 determines whether or not the initial value ID0 is 0. When the initial value ID0 is 0 (YES in step S33), the control unit 31 sets the initial value ID0 to the current value IDx in step S20. Then, the control part 31 transfers a process to step S21. On the other hand, if the initial value ID0 is not 0 (NO in step S33), the control unit 31 proceeds to step S21 without executing step S20, that is, in a state where the initial value I0 is maintained.

  The control part 31 performs step S21-step S23 similarly to 1st Embodiment. In this case, when the current value IDx is different from the initial value ID0 (NO in step S21), or when reading of the general information 56 has failed (NO in step S23), the control unit 31 proceeds to step S31 in FIG. Then, the process after step S31 is repeated. If the current value IDx is the same as the initial value ID0 (YES in step S21 in FIG. 10) and the general information 56 has been successfully read (YES in step S23), the control unit 31 proceeds to step S24. To migrate. In step S <b> 24, the control unit 31 outputs the reading result by the output unit 35 and transmits the reading result to the external device 40 via the communication unit 37. And the control part 31 complete | finishes a process (end).

  On the other hand, in step S31 of FIG. 9, when the initial value ID0 is a value different from 0 (NO in step S31), the control unit 31 proceeds to step S32. Then, the control unit 31 determines whether or not the receiving unit 36 has received a clear command for the initial value ID0 from the external device 40. When the receiving unit 36 has not received the clear command for the initial value ID0 (NO in step S32), the control unit 31 executes step S13 and subsequent steps as described above. On the other hand, when the receiving unit 36 receives a clear command for the initial value ID0 (YES in step S32), the control unit 31 ends the information code reading process (END in FIG. 10).

As described above, in the present embodiment, the control unit 31 determines that the code reading unit 34 succeeds in reading the unique information 57 (YES in step S16) and fails to read the general information 56 (in step S23 of FIG. 10). NO) until the receiving unit 36 receives a command from the external device 40 (YES in step S32 in FIG. 9), the general information 56 is obtained for the information code 50 having the unique information 57 different from the unique information 57 that has been successfully read. The code reading unit 34 is controlled so as not to read (NO in step S21).
According to this, the same effect as the first embodiment can be obtained.

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS. The numbers given to the upper part of the “reading state” arrow in FIGS. 13 to 15 mean the step numbers in FIGS. 11 and 12.
In the present embodiment, as shown in FIGS. 13 to 15, the control unit 31 adds information identifiers 581 and 582 that identify the type of information included in the read result to the output content output from the output unit 35. . For example, as illustrated in FIG. 13, the control unit 31 adds and outputs a first information identifier 581 to the unique information 57 and the general information 56 when the unique information 57 and the general information 56 are successfully read. In this case, the first information identifier 581 indicates that the unique information 57 and the general information 56 have been successfully read. That is, the first information identifier 581 indicates that the content output from the output unit 35 includes the unique information 57 and the general information 56.

  Further, for example, as shown in FIGS. 14 and 15, the control unit 31 adds the second information identifier 582 to the unique information 57 when the unique information 57 has been successfully read but the general information 56 has failed to be read. And output. In this case, the second information identifier 582 indicates that the reading of the general information 56 has failed. That is, the second information identifier 582 indicates that the general information 56 is not included in the content output from the output unit 35.

  As shown in FIGS. 14 and 15, the control unit 31 outputs an output unit when the general information 56 cannot be read even after the first period T <b> 1 elapses after the code reading unit 34 reads the unique information 57. 35, unique information 57 is output. Then, after outputting the unique information 57 from the output unit 35, the control unit 31 does not detect the position detection patterns 521 to 523 and continues to detect the position detection patterns 521 to 523. Does not output the unique information 57 from the output unit 35. In addition, after outputting the unique information 57 from the output unit 35, the control unit 31 succeeds in reading the unique information 57 after the undetected state of the position detection patterns 521 to 523 continues for the second period T2 and thereafter. When the general information 56 cannot be read even after the first period T1 has elapsed, the unique information 57 is output again from the output unit 35.

  In this case, the second period T2 is longer than the first period T1. For example, the second period T2 is assumed as a period from when the user who put the information code display medium 60 to the information code reading device 30 removes the information code display medium 60 from the information code reading device 30 and then turns it again. For example, about 1 second. The first period T1 is a period shorter than the second period T2, and is about 0.5 seconds, for example.

  In this embodiment, the control part 31 performs the information code reading process shown in FIG.11 and FIG.12. The processing content shown in FIG. 11 includes steps S41 and S42 in addition to the processing content of FIG. 6 or FIG. In addition, in FIG. 11, the process after step S13 is shown. In this case, in the processing contents of FIG. 11, the processing contents before step S13 may be those shown in FIG. 6, that is, steps S11 to S13, or those shown in FIG. 9, that is, steps S11, S31, and S32. Also good.

  Further, the processing content shown in FIG. 12 includes steps S43 to S47 in addition to the processing content shown in FIG. Note that FIG. 12 shows processing after step S22. In this case, in the processing contents of FIG. 12, the processing contents before step S22 may be those shown in FIG. 7, that is, steps S18 to S21, or those shown in FIG. 10, that is, steps S33, S20, S21. Also good. Further, the processing content shown in FIG. 12 includes steps S43 and S47 in place of step S24 in FIG. 7 or FIG.

  Specifically, the control unit 31 executes steps S11 and S12 in FIG. 6 or steps S11, S31, and S32 in FIG. 9, and further executes steps S13 and S14 shown in FIG. In this case, the control unit 31 sets the variable F to 0 in the initial setting in step S11. The variable F determines whether to permit the output of the unique information 57 from the output unit 35. When the variable F is 0, the control unit 31 permits the output of the unique information 57 from the output unit 35. On the other hand, when the variable F is a value different from 0, the control unit 31 does not permit the output of the unique information 57 from the output unit 35.

  If the position detection patterns 521 to 523 are not detected as a result of the process of step S13 in FIG. 11 (NO in step S14), the control unit 31 shifts the process to step S41. In step S41, the control unit 31 determines whether or not the undetected state of the position detection patterns 521 to 523 continues for the second predetermined period T2 or more. When the undetected state of the position detection patterns 521 to 523 continues for the second predetermined period T2 or more (YES in step S41), the control unit 31 sets the variable F to 0 in step S42. Then, the control part 31 transfers a process to step S12 of FIG. 6, or step S31 of FIG.

  On the other hand, when the undetected state of the position detection patterns 521 to 523 does not continue for the second predetermined period T2 or more (NO in step S41 of FIG. 11), the control unit 31 does not execute step S42, but executes FIG. The process proceeds to step S12 or step S31 in FIG. That is, when the position detection patterns 521 to 523 are not in the undetected state, or when the position detection patterns 521 to 523 have not been detected yet within the second predetermined period T2, the control unit 31 performs step S42. Do not execute.

  In step S23 of FIG. 12, the control unit 31 determines whether the reading of the general information 56 performed in step S22 is successful. When the reading of the general information 56 is successful (YES in step S23), the control unit 31 shifts the process to step S43. In step S43, the control unit 31 outputs the first information identifier 581 from the output unit 35 in addition to the general information 56 and the unique information 57, as shown in FIG.

  On the other hand, when the reading of the general information 56 fails (NO in step S23), the control unit 31 shifts the process to step S44. In step S44, the control unit 31 determines whether or not the first period T1 has elapsed since the reading of the general information 56 first failed. Here, “first failure to read the general information 56” means that the position detection patterns 521 to 523 are detected for the first time after starting (starting) the information code reading process (YES in step S14 in FIG. 11), and thereafter This means that the reading of the general information 56 has failed for the first time (NO in step S23 in FIG. 12).

  If the first period T1 has not elapsed since the first reading of the general information 56 failed (NO in step S44), the control unit 31 does not execute steps S45 to S47, but executes step S12 in FIG. The process proceeds to step S31 in FIG. That is, when reading of the general information 56 fails for the first time (NO in step S23) and the first period T1 does not elapse (NO in step S44), the reading of the general information 56 fails again (step S44). The control unit 31 proceeds to step S12 in FIG. 6 or step S31 in FIG. 9 without executing steps S45 to S47.

  On the other hand, when the first period T1 has elapsed since the reading of the general information 56 first failed (YES in step S44), the control unit 31 proceeds to step S45. In step S45, the control unit 31 determines whether or not the variable F is zero. The fact that the variable F is 0 indicates that the steps S46 and S47 have not been executed yet and the unique information 57 has not been output, or the steps S46 and S47 have been executed and the unique information 57 has been output. This means that the undetected state of the position detection patterns 521 to 523 continues for the second period T2 or more (YES in step S41 in FIG. 11), and the variable F is reset to 0 (step S42). Therefore, when the variable F is 0 (YES in step S45), the control unit 31 outputs the second information identifier 582 in addition to the unique information 57 in step S46 as shown in FIG. 35.

  Also, if the variable F is a value different from 0, it means that the steps S46 and S47 have already been executed and the unique information 57 has been output and the position detection patterns 521 to 523 have not yet been detected, or It means that the steps S46 and 47 are executed, the unique information 57 is output, and the position detection patterns 521 to 523 are not detected for the second period T2 or longer. Therefore, when the variable F is not 0 (NO in step S45 in FIG. 12), the control unit 31 does not execute steps S46 and S47, that is, without outputting the unique information 57, the step S12 in FIG. The process proceeds to step S31 in FIG.

  That is, if the steps S46 and 47 have already been executed and the unique information 57 has been output and the position detection patterns 521 to 523 have not yet been detected, or if the steps S46 and 47 have already been executed and the unique information 57 has been obtained. In the case where the position detection patterns 521 to 523 are not detected and are not continued for the second period T2 or more, the control unit 31 outputs the second identification information 582 and the unique information 57 from the output unit 35. Is not output.

  Thus, in the present embodiment, the control unit 31 adds information identifiers 581 and 582 that identify the type of information included in the read result to the output content output from the output unit 35. According to this, the external device 40 that has received the reading result from the information code reading device 30 can determine the type of information included in the reading result by looking at the information identifiers 581 and 582 added to the reading result. Convenient.

  Here, for example, if the user keeps the information code display medium 60 on the information code reading device 30 in a state where a part of the encoding area 55 is hidden by the user's finger or the like, the following problem occurs. . That is, in this case, the information code reading device 30 reads the unique information 57 and the general information 56 while the user is holding the information code display medium 60. If the configuration is such that the unique information 57 is output every time reading of the general information 56 fails, the output unit 35 continues to output the unique information 57 until the general information 56 is successfully read. . Then, the amount of information received by the external device 40 increases and the processing of the external device 40 becomes complicated.

  Therefore, in the present embodiment, the control unit 31 succeeds in reading the unique information 57 (YES in step S16 in FIG. 11), and then fails to read the general information 56 even after the first period T1 has elapsed. (NO in step S23 of FIG. 12 and YES in step S44), the unique information 57 is output from the output unit 35. Therefore, the control unit 31 does not output the unique information 57 every time reading of the general information 56 fails. In other words, once the unique information 57 is output, the control unit 31 does not continue outputting the unique information 57 until the general information 56 is successfully read. Therefore, an increase in the amount of information received by the external device 40 can be suppressed, and as a result, the processing of the external device 40 can be prevented from becoming complicated and the processing load can be reduced.

  In addition, the number of times the information code display medium 60 is tricked against the information code reading device 30 is useful information for controlling the information code reading device 30 and the external device 40. Here, the fact that the detection states of the position detection patterns 521 to 523 are continuing without the position detection patterns 521 to 523 being in an undetected state means that the information code 50 once deceived from the information code reading device 30. It means that they are not separated, that is, the tricking operation is performed only once. Therefore, after the unique information 57 is output from the output unit 35, the control unit 31 does not detect the position detection patterns 521 to 523 and continues to detect the position detection patterns 521 to 523. Does not output the unique information 57 from the output unit 35.

  Further, when the position detection patterns 521 to 523 are in the undetected state and the position detection patterns 521 to 523 are again detected, there is a possibility that the information code display medium 60 has been defaced. Therefore, after outputting the unique information 57 from the output unit 35, the control unit 31 further succeeds in reading the unique information 57 after the undetected state of the position detection patterns 521 to 523 continues for the second period T2 and thereafter. When the general information 56 cannot be read even after the first period T1 has elapsed, the unique information 57 is output again from the output unit 35.

  In this case, whether the position detection patterns 521 to 523 are detected again after the position detection patterns 521 to 523 are in the non-detected state determines whether it is a mere reading failure or whether a decoy operation has been performed. Can not do it. Therefore, the control unit 31 sets the second period T2 to a time required for redoing the trick operation, for example, about 1 second. And the control part 31 makes specific information 57 one of the conditions of an output again that the undetected state continued more than 2nd period T2.

  According to this, the number of times the unique information 57 is output can be assumed to be the number of times the information code display medium 60 has been deceived. Therefore, the external device 40 can artificially grasp the number of times the user has defaced the information code display medium 60 by measuring the number of unique information 57 received from the information code reading device 30.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIG.
In 4th Embodiment, the structure of the specific information 57 arrange | positioned at the information code 50 differs from the thing of said each embodiment. In the present embodiment, the information code generation device 20 generates barcodes 591 and 592 as the encoded unique information 57. In this case, one of the two barcodes 591 and 592 is referred to as a first barcode 591 and the other is referred to as a second barcode 592. Each of the first barcode 691 and the second barcode 592 indicates the unique information 57 having the same content.

  In the present embodiment, the two-dimensional code constituting the information code 50 is, for example, a QR code. Then, the information code generating apparatus 20 arranges the two barcodes 591 and 592 at positions adjacent to the encoding area 55 outside the encoding area 55 and between the two position detection patterns. That is, the information code generating apparatus 20 arranges the barcodes 591 and 592 outside the QR code code area 51 at a position in contact with the QR code code area 51. In this case, the first barcode 591 is disposed between the first position detection pattern 521 and the third position detection pattern 523. Further, the second barcode 592 is disposed between the second position detection pattern 521 and the third position detection pattern 523.

  According to this, the unique information 57 is arranged outside the encoding area 55 as barcodes 591 and 592. Accordingly, it is possible to suppress a decrease in the information amount of the general information 56 due to the arrangement of the unique information 57 in the encoding area 55. That is, according to this embodiment, the size of the information code 50 with respect to the general information 56 can be reduced.

  Further, the barcodes 591 and 592 are each between two position detection patterns, that is, between the first position detection pattern 521 and the third position detection pattern 523 and between the second position detection pattern 521 and the third position detection pattern 523. Arranged between. That is, the barcodes 591 and 592 are not adjacent to any of the position detection patterns 521 to 523.

  Here, in order to arrange the barcodes 591 and 592 adjacent to the position detection patterns 521 to 523, it is necessary to provide a certain quiet zone, that is, a margin, between the barcodes 591 and 592 and the position detection patterns 521 to 523. There is. On the other hand, as shown in FIG. 16, if the barcodes 591 and 592 are arranged outside the QR code area 51 and outside the encoding area 55, the barcodes 591 and 592 and the encoding area 55 There is no need to provide a quiet zone between them. By providing the barcodes 591 and 592 outside the QR code code area 51 and between the position detection patterns 521 to 523, the distance between the barcodes 591 and 592 and the position detection patterns 521 to 523 can be made as close as possible. it can. That is, it is possible to avoid the deterioration of the reading performance of the barcodes 591 and 592 due to the arrangement of the barcodes 591 and 592 outside the code area 51 as much as possible.

  As mentioned above, although several embodiment of this invention was described, these embodiment was shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 10 is an information code system, 20 is an information code generation device (printing device), 30 is an information code reading device, 31 is a control unit, 32 is an imaging unit, 34 is a code reading unit, 35 is an output unit, and 36 is Receiver 40, external device 50, information code (two-dimensional code, QR code), 51 code area, 521 first position detection pattern (position detection pattern, function pattern), 522 second position detection pattern ( (Position detection pattern, function pattern) 523 is a third position detection pattern (position detection pattern, function pattern), 541 is a first separation pattern (separation pattern), 542 is a second separation pattern (separation pattern), and 543 is a third Separation pattern (separation pattern), 55 is an encoding area, 56 is general information, 57 is unique information, 572 is a device identifier, 573 is a serial number, and 581 is 1 information identifier (information identifier), 582 second information identifier (information identifier), the first bar code (bar code) 591, 592 second bar code (bar code), 60 denotes an information code display medium.

Claims (14)

An imaging unit capable of imaging the information code displayed on the medium;
A code reading unit capable of reading the information code imaged by the imaging unit;
An output unit capable of outputting a reading result of the information code read by the code reading unit;
A control unit for controlling the imaging unit, the code reading unit, and the output unit,
The information code includes general information to be recorded, and unique information set uniquely to the general information,
The control unit, when the code reading unit succeeds in reading the unique information and fails to read the general information, the information code having the unique information different from the unique information that has been successfully read. Controlling the code reading unit so as not to read general information;
Information code reader. The control unit, when the code reading unit succeeds in reading the unique information and fails to read the general information, the unique information that has been successfully read until a predetermined period of time elapses. Control the code reading unit so as not to read the general information for the information code having different unique information,
The information code reading device according to claim 1. A receiving unit capable of receiving a command from an external device;
The control unit, when the code reading unit succeeds in reading the unique information and fails in reading the general information, the reading unit succeeds in reading until receiving a command from the external device. Controlling the code reading unit so as not to read the general information for the information code having unique information different from the unique information;
The information code reading device according to claim 1. The control unit adds an information identifier for identifying the type of information included in the read result to the output content output from the output unit.
The information code reading device according to any one of claims 1 to 3. The control unit outputs the unique information from the output unit when the general information cannot be read even after the first period has elapsed since the code reading unit has read the unique information.
The information code reading device according to any one of claims 1 to 4. After the control unit outputs the unique information from the output unit,
While the detection state of the position detection pattern continues without the position detection pattern being undetected, the unique information is not output from the output unit,
When the reading of the unique information is further succeeded after the undetected state of the position detection pattern continues for a second period or longer, and the general information cannot be read after the first period, the output unit The unique information is output again from
The information code reader according to claim 5. A function pattern having a preset shape and encoded general information are arranged inside a predetermined code area, and encoded specific information uniquely set in the general information is placed inside or around the code area. Place and generate information code,
Information code generation method. The unique information includes a device identifier for identifying a printing device that prints the information code on a medium, and a serial number indicating the order of printing by the printing device.
The information code generation method according to claim 7. The function pattern, the general information, and the unique information are configured with a two-dimensional code.
The information code generation method according to claim 7 or 8. The unique information is arranged adjacent to a separation pattern that separates the coding region and the position detection pattern in the coding region.
The information code generation method according to claim 9. The function pattern and the general information are configured with a two-dimensional code, and the unique information is configured with a barcode.
The information code generation method according to claim 7 or 8. The unique information is arranged at a position adjacent to the coding area between the two position detection patterns outside the coding area.
The information code generation method according to claim 11. Placing the unique information of the same content in at least two places,
The information code generation method according to any one of claims 7 to 12.   An information code display medium on which an information code generated by the information code generation method according to any one of claims 7 to 13 is displayed.

Images