JP2017084262A - Code reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a code reader for outputting information in response to failure of acquisition of code data.SOLUTION: According to an embodiment, the code reader comprises an acquisition section, a code reading section, a mark detection section and a first output section. The acquisition section acquires a photographed image. The code reading section reads a data code from the photographed image. The mark detection section detects a mark indicating existence of the data code from the photographed image. The first output section outputs the code data corresponding to the data code when the code reading section reads the data code, and outputs first predetermined information when the code reading section does not read the data code and the mark detection section detects the mark.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a code reader.

  A code reader that reads a two-dimensional code or the like reads a code from a curled sheet or screen, and notifies the outside of data acquired from the read code. If the code reader fails to read the code from the sheet or screen even though the sheet or screen has been defaced, the code reader becomes unresponsive. Conventionally, the code reader becomes non-responsive while waiting to read the code, but there is a problem that the code reader similarly becomes non-responsive even when the code reading fails.

JP 2013-191018 A

  According to the prior art document, the code stamp state or the deterioration of the code reader is determined based on the error correction function of the data code depending on how much the code is read in error. However, the prior art document detects a mark that is easy to detect when reading a data code, so that the medium has been defaced by a code reader but cannot be read, or the medium has not been defaced and cannot be read. I can't judge whether it was.

  In order to solve the above problems, a code reader is provided that outputs information in response to a code reading failure.

  According to the embodiment, the code reader includes an acquisition unit, a code reading unit, a mark detection unit, and a first output unit. The acquisition unit acquires a captured image. The code reading unit reads a data code from the photographed image. The mark detection unit detects a mark indicating the presence of the data code from the captured image. When the first output unit and the code reading unit read the data code, code data corresponding to the data code is output, and the code reading unit does not read the data code and the mark detection unit When detecting, the first predetermined information is output.

FIG. 1 is a block diagram illustrating a configuration example of a code reader according to the embodiment. FIG. 2 is a diagram illustrating a configuration example of the surface of the ticket according to the embodiment. FIG. 3 is a diagram illustrating another configuration example of the surface of the ticket according to the embodiment. FIG. 4 is a diagram illustrating a configuration example of the back surface of the ticket according to the embodiment. FIG. 5 is a diagram illustrating another configuration example of the back surface of the ticket according to the embodiment. FIG. 6 is a flowchart for explaining an operation example of the code reader according to the embodiment. FIG. 7 is a flowchart for explaining an operation example of the code reader according to the embodiment.

  Hereinafter, embodiments will be described with reference to the drawings.

  The code reader according to the embodiment reads a code recorded on a sheet (for example, a ticket) or a code displayed on a screen (a liquid crystal screen such as a smartphone). Here, the code read by the code reader is a two-dimensional code. The code read by the code reader is, for example, a stack type or matrix type two-dimensional code. The code read by the code reader is, for example, a QR code (registered trademark). The code read by the code reader is not limited to a specific two-dimensional code.

  The code reader may read a one-dimensional code such as a barcode as a code. The code read by the code reader is not limited to a specific configuration.

  For example, the code reader decodes the read code, acquires code data, and transmits the code data to an external device.

Next, a configuration example of the code reader will be described.
FIG. 1 is a block diagram illustrating a configuration example of the code reader 1.

  As shown in FIG. 1, the code reader 1 includes a processor 11, a ROM 12, a RAM 13, a first timer 14a, a second timer 14b, a camera 15, a communication unit 16, and the like.

  The processor 11 has a function of controlling the operation of the entire code reader 1. The processor 11 may include an internal cache and various interfaces. The processor 11 implements various processes by executing a program stored in advance in the internal memory, the ROM 12 or the like.

  Note that some of the various functions realized by the processor 11 executing the program may be realized by a hardware circuit. In this case, the processor 11 controls a function executed by the hardware circuit.

  The ROM 12 is a non-volatile memory in which a control program and control data are stored in advance. The control program and control data stored in the ROM 12 are incorporated according to the specifications of the code reader 1 in advance. The ROM 12 stores, for example, a program for controlling the circuit board of the code reader 1.

  The RAM 13 is a volatile memory. The RAM 13 temporarily stores data being processed by the processor 11. The RAM 13 stores various data based on instructions from the processor 11. The RAM 13 may store data necessary for program execution, program execution results, and the like.

  The first timer 14a measures the time from when the processor 11 detects the detection mark. For example, the first timer 14a starts measuring time based on a signal from the processor 11, and notifies the processor 11 of the measured time. Further, the first timer 14 a may transmit a predetermined signal to the processor 11 when measuring a predetermined time. Note that the first timer 14 a may be realized as a function of the processor 11.

The second timer 14b measures the time from the time when the processor 11 transmits a reading abnormality signal or detection information. The second timer 14b has the same configuration as the first timer 14a.
The first timer 14a and the second timer 14b may be one timer.

  The camera 15 acquires an image including a code recorded on a sheet or a code displayed on a screen. For example, the camera 15 acquires an image by acquiring reflected light of light that is built in the camera 15 or illuminated by illumination provided in the code reader 1. The camera 15 acquires an image by acquiring light emitted from a screen or the like. The camera 15 may acquire an image using visible light. The camera 15 can acquire an image using invisible light. That is, the camera 15 acquires an image using predetermined dedicated light that is invisible light. For example, the camera 15 is a CCD or the like.

For example, the camera 15 captures a code from a sheet or screen that is worn by the camera 15.
The camera 15 may be a handy type. For example, the camera 15 may photograph the code by being worn on a sheet or screen by an operator or the like.

  Here, it is assumed that the camera 15 photographs a code recorded on the ticket 2 as a sheet.

  The communication unit 16 is an interface for transmitting / receiving data to / from an external device. The communication unit 16 connects to an external device wirelessly or by wire. The communication unit 16 is an interface that supports USB connection, for example.

  When the code is successfully read (that is, when the code data is successfully acquired), the processor 11 transmits the code data (decode result) acquired to the external device through the communication unit 16. Further, when the processor 11 fails to read the code (that is, fails to acquire the code data) and succeeds in detecting the detection mark, the processor 11 reads an abnormal reading signal indicating that the reading of the code has failed to the external device through the communication unit 16. (First predetermined information) or mark detection information (first predetermined information) indicating detection of the detection mark is transmitted. For example, the reading abnormality signal is information indicating that the code reading has failed. That is, the processor 11 transmits different information to the subsequent processing device when the code data acquisition is successful and when the code data acquisition fails but the detection mark detection is successful.

  The code reader 1 may further include necessary elements as appropriate, or delete unnecessary elements. For example, the code reader 1 may include a nonvolatile memory that can rewrite data, a display unit that displays an image, or a speaker unit that outputs sound.

Next, the ticket 2 will be described.
The ticket 2 is, for example, a rectangular heat sensitive medium. When heat is applied from the outside, the applied portion of the ticket 2 changes to a predetermined color. For example, the ticket 2 changes to black due to heat. For example, the ticket 2 is paper, plastic, vinyl, or the like.

FIG. 2 shows a configuration example of the surface of the ticket 2 photographed by the camera 15.
As shown in FIG. 2, the surface of the ticket 2 includes a data code 21 and the like.

  The data code 21 is a code created by encoding predetermined data. The data code 21 is printed on the voucher 2 by an issuing machine that issues the voucher 2. For example, the issuing machine prints the data code 21 on the ticket 2 by heating the ticket 2. Here, the data code 21 is a two-dimensional code. For example, the data code 21 is a QR code.

  For example, the data code 21 may include ticket information. That is, the data code 21 may be created by encoding the ticket information. The information indicated by the data code 21 is not limited to a specific configuration.

The data code 21 has detection marks 22a to 22c. The detection marks 22a to 22c indicate the presence of the data code 21. For example, the detection marks 22a to 22c indicate that the data code 21 is within a predetermined range from the reference position of the detection marks 22a to 22c.
The detection marks 22a to 22c are formed in the data code 21. That is, the detection marks 22 a to 22 c are formed as a part of the data code 21. The detection marks 22a to 22c may indicate the position and / or direction of the data code 21. For example, the processor 11 may recognize the position and / or direction of the data code 21 from the positions of the detection marks 22a to 22c. For example, when the data code 21 is a QR code, the detection marks 22a to 22c may be a QR code FP (finder pattern).

  The detection marks 22a to 22c are formed at the corners of the data code 21, respectively. In the example shown in FIG. 2, the detection marks 22a to 22c are formed at the upper left, upper right, and lower left of the data code 21, respectively. The detection mark 22 may be formed at the center of the data code 21 or may be formed at another location. The position and number of detection marks 22 included in the data code 21 are not limited to a specific configuration.

  Note that the ticket 2 may include a character string or the like in an area other than the area (code area) where the data code 21 is formed. For example, the ticket 2 may include a character string related to the data code 21 in the area.

Next, another configuration example of the surface of the ticket 2 will be described.
FIG. 3 shows another configuration example of the surface of the ticket 2.
As shown in FIG. 3, the surface of the ticket 2 has at least one detection mark 22 outside the code area in addition to the data code 21. In the example shown in FIG. 3, the surface of the ticket 2 includes detection marks 22d to 22g.

The detection marks 22d to 22g have the same configuration as the detection marks 22a to 22c.
The detection marks 22d to 22g are formed on the upper left, lower left, upper right, and lower right of the surface of the ticket 2, respectively. Note that the detection mark may be formed at other locations other than the code area. The position and number of detection marks 22 formed outside the code area are not limited to a specific configuration.

Next, the back surface of the ticket 2 will be described.
FIG. 4 shows a configuration example of the back surface of the ticket 2.
As shown in FIG. 4, the back surface of the ticket 2 includes detection marks 22h to 22k. The detection marks 22h to 22k have the same configuration as the detection marks 22a to 22c.

  In the example shown in FIG. 4, the detection marks 22 h to 22 k are formed on the upper left, lower left, upper right, and lower right of the back side of the ticket 2, respectively. Note that the back surface of the ticket 2 may be provided with detection marks 22 at other positions. The number and position of the detection marks 22 provided on the back surface of the ticket 2 are not limited to a specific configuration.

Next, another configuration example of the back surface of the ticket 2 will be described.
FIG. 5 shows another configuration example of the back surface of the ticket 2.
As shown in FIG. 5, the back surface of the ticket 2 includes a concealing layer 23 and a detection code 24.

  The concealing layer 23 is a layer from which information (code) is read using predetermined dedicated light (a recording area where information can be read by the dedicated light). The masking layer 23 transmits predetermined dedicated light and does not transmit visible light. The camera 15 can irradiate predetermined dedicated light to obtain reflected light from a cord or the like under the concealing layer 23.

The dedicated light is invisible light that can be read by the camera 15. The dedicated light is, for example, ultraviolet light or infrared light.
The hiding layer 23 may be formed on the entire back surface of the ticket 2.

  The detection code 24 is a code created by encoding predetermined information. For example, the detection code 24 may indicate the same information for any ticket 2. For example, the detection code 24 may indicate that it is formed on the back surface. Further, the detection code 24 may be a test code. For example, the detection code 24 is a QR code.

  The detection code 24 is formed under the concealing layer 23. Therefore, the detection code 24 is read with predetermined dedicated light. That is, the detection code 24 can be read with invisible light.

Next, functions realized by the processor 11 will be described.
The processor 11 has a function of acquiring a captured image captured by the camera 15 (acquisition unit). For example, the processor 11 transmits a signal for capturing an image to the camera 15. The processor 11 acquires an image transmitted from the camera 15 as a captured image.

  In addition, the processor 11 has a function of detecting that a medium (for example, a ticket 2) has been tampered with the camera 15. For example, the processor 11 detects that the medium has been defaced from the brightness or darkness of the captured image captured by the camera 15. Further, the processor 11 may detect that the medium has been tampered with using another sensor such as a proximity sensor.

  The processor 11 has a function of scanning the captured image and reading the data code 21 or the detection code 24 (code reading unit). For example, the processor 11 raster scans the captured image to detect the data code 21 or the detection code 24. Further, the processor 11 detects the pattern of the dark module and the bright module of the data code 21 or the detection code 24. The processor 11 decodes the data code 21 or the detection code 24 from the detected pattern, and acquires predetermined data from the data code 21 or the detection code 24. Note that the method by which the processor 11 reads the data code 21 or the detection code 24 and the method for obtaining data from the data code 21 or the detection code 24 are not limited to specific methods.

  The processor 11 also has a function of scanning the captured image and detecting the detection mark 22 (mark detection unit). For example, the processor 11 detects the detection mark 22 by raster scanning the captured image. Note that the method by which the processor 11 detects the detection mark 22 is not limited to a specific method.

  The processor 11 may execute the function of reading the data code 21 or the detection code 24 and the function of detecting the detection mark 22 simultaneously in parallel. For example, the processor 11 scans the captured image, and simultaneously executes a function of reading the data code 21 or the detection code 24 and a function of detecting the detection mark 22.

  Further, when the processor 11 reads the detection code 24, the back surface notification (second predetermined information) indicating that the back surface of the ticket 2 has been defaced or the detection code indicating detection of the detection code It has a function of outputting detection information (second predetermined information) (second output unit).

  Further, the processor 11 cannot read the data code 21 within a predetermined time (first predetermined time) after detecting the detection mark 22 (that is, if the code data cannot be acquired from the data code 21), or the ticket When the paper 2 is no longer trapped by the camera 15, it has a function of outputting a reading abnormality notification indicating that reading of the data code 21 has failed or mark detection information indicating detection of a detection mark (first output unit) ).

  For example, when the processor 11 detects the detection mark 22, the processor 11 starts the first timer 14a. For example, the processor 11 transmits a signal for causing the first timer 14a to start measuring time. The processor 11 performs an operation of reading the data code 21 from the captured image until the first timer 14a measures a first predetermined time (for example, a time arbitrarily set between 0.1 second and 1 second). continue.

  Further, when the processor 11 detects the detection mark 22, it determines whether the ticket 2 is no longer trapped by the camera 15. The processor 11 continues the operation of reading the data code 21 from the captured image until it is determined that the ticket 2 is no longer trapped by the camera 15.

  For example, the processor 11 may read the data code 21 based on the detected detection mark 22. For example, the processor 11 estimates the position and direction of the data code 21 based on the position of the detection mark 22 and the like. The processor 11 may read the data code 21 based on the estimated position and direction of the data code 21.

  Further, the processor 11 ends the reading operation of the data code 21 when the first timer 14a measures the first predetermined time. When the processor 11 completes the reading operation of the data code 21, for example, a reading abnormality notification indicating that reading of the data code 21 has failed or mark detection information indicating detection of the detection mark is transmitted to the external device via the communication unit 16. Send.

  In addition, when the processor 11 detects that the detection mark 22 is detected within a predetermined time (second predetermined time) after transmitting the reading abnormality notification or mark detection information to the external device, the processor 11 detects the reading abnormality notification or mark detection information. Is not sent to the external device.

  For example, when the processor 11 transmits a reading abnormality notification or mark detection information to the external device, the processor 11 starts the second timer 14b. For example, the processor 11 transmits a signal for causing the second timer 14b to start measuring time. The processor 11 does not transmit the reading abnormality notification or the mark detection information to the external device even if the detection mark 22 is detected until the second timer 14b measures the second predetermined time (for example, several seconds).

  Further, the processor 11 transmits the reading abnormality notice or the mark detection information to the external apparatus even if the detection mark 22 is detected when the reading abnormality notification or the mark detection information is transmitted to the external apparatus and the ticket 2 is not reproduced again. do not do.

  For example, when the reading abnormality notification or the mark detection information is transmitted to the external device, the processor 11 determines whether or not the ticket 2 is defaced and the sheet 2 is defaced again. The processor 11 does not transmit the reading abnormality notification or the mark detection information to the external device even if the detection mark 22 is detected until the ticket 2 is re-checked.

  When the reading abnormality notification or the mark detection information is output every time the detection mark is detected even after the reading abnormality notification or the mark detection information is transmitted, the processor 11 notifies the reading abnormality many times as long as the medium continues to be defaced. Alternatively, mark detection information may be transmitted to an external device. In that case, the external device cannot determine how many times the media has been deceived. Therefore, even if the processor 11 detects the detection mark 22 if the detection mark 22 is not detected for a second predetermined time or more after transmitting the reading abnormality notification or the mark detection information, the processor 11 detects the reading abnormality notification or the mark detection information. Do not send. Accordingly, the processor 11 can synchronize the operation of the external device and the operation of the user picking up the medium without the external device performing complicated processing.

  Here, the processor 11 detects the next detection mark 22 and then the second predetermined time has elapsed since the reading abnormality notification or mark detection information related to the previous detection mark 22 is transmitted to the external device, or When the ticket 2 is re-checked, when the detection mark 22 is detected again, a reading abnormality notification or mark detection information is transmitted to the external device.

Next, an operation example of the processor 11 will be described.
6 and 7 are flowcharts for explaining an operation example of the processor 11.
Here, it is assumed that the operator holds the ticket 2 on the camera 15. Further, it is assumed that the second timer 14b is stopped in a state where the second predetermined time is counted in the initial state. Thereby, the processor 11 determines YES in S16 after first detecting the detection mark 22, and can start the first timer 14a.

  First, the processor 11 acquires a captured image captured by the camera 15 (S11). When the captured image is acquired, the processor 11 scans the captured image (S12).

  When the captured image is scanned, the processor 11 determines whether the data code 21 has been read from the captured image (S13). The processor 11 reads the data code 21 from the photographed image, tries to decode the code data from the data code 21, and acquires the code data. For example, the data code 21 includes an error correction code, and even if a part of the code is missing (even if a part of the code is not read), the processor 11 may decode the code data using the error correction code. it can. In this way, the processor 11 tries to decode the code data and determines whether the code data has been successfully acquired from the data code 21. If it is determined that the data code 21 has not been read from the photographed image (S13, NO), that is, if it is determined that the code data has not been acquired, the processor 11 determines whether the detection code 24 has been read (S14). The processor 11 determines whether or not the detection code 24 has been successfully acquired in the same manner as the reading of the data code 21.

  If it is determined that the detection code 24 is not read (S14, NO), the processor 11 determines whether the detection mark 22 has been detected (S15).

  If it is determined that the detection mark 22 has not been detected (S15, NO), the processor 11 returns to S11.

  If it is determined that the detection mark 22 has been detected (S15, YES), the processor 11 determines whether the second timer 14b has timed the second predetermined time or whether the ticket 2 has been retanned. (S16). If it is determined that the second timer 14b has timed the second predetermined time or that the ticket sheet 2 has been retanned (S16, YES), the processor 11 starts the first timer 14a (S17). . When the first timer 14a is started, the processor 11 acquires a captured image captured by the camera 15 (S18). When the captured image is acquired, the processor 11 scans the captured image (S19).

  When the captured image is scanned, the processor 11 determines whether the data code 21 has been read from the captured image (S20). If it is determined that the data code 21 is not read from the photographed image (S20, NO), the processor 11 determines whether the first timer 14a has timed the first predetermined time or whether the ticket 2 has been deceived ( S21).

  If it is determined that the first timer 14a has not timed the first predetermined time and the ticket 2 has been tampered with (S21, NO), the processor 11 returns to S18. When it is determined that the first timer 14a has timed the first predetermined time or the ticket 2 has not been deceived (S21, YES), the processor 11 indicates that the reading of the data code 21 has failed through the communication unit 16. A reading abnormality notification or mark detection information indicating detection mark detection is transmitted to the external device (S22).

  When the reading abnormality notification or the mark detection information is transmitted, the processor 11 starts the second timer 14b (S23). For example, the processor 11 resets the second timer 14b and starts measuring time.

  When the second timer 14b is started (S23), or when it is determined that the second timer 14b has not timed the second predetermined time and the ticket 2 is not retanned (S16) , NO), the processor 11 returns to S11.

  When it is determined that the data code 21 is read from the photographed image (S13, YES), or when it is determined that the data code 21 is read from the photographed image (S20, YES), the processor 11 transmits the data code 21 through the communication unit 16. Is transmitted to the external device (S24).

  If it is determined that the detection code 24 has been read (S14, YES), the processor 11 uses the communication unit 16 to notify the back side indicating that the back side of the ticket 2 has been tampered with or to detect the detection code. Code detection information is transmitted to the external layer (S25).

  When the reading abnormality notification or the mark detection information is transmitted (S24), or when the back surface notification or the detection code detection information is transmitted (S25), the processor 11 ends the operation.

  The code reader 1 may include a display unit that displays an image. For example, the processor 11 may display a message indicating that reading has failed on the display unit as a reading abnormality notification. Further, the processor 11 may display the code data on the display unit.

  Further, the code reader 1 may include a speaker that outputs sound. For example, the processor 11 may output a warning sound or a warning sound indicating that reading has failed through a speaker as a reading abnormality notification.

  For example, when detecting the detection mark 22 again, the processor 11 may reset the first timer 14a (the first timer 14a may be returned to the initial value). The processor 11 may extend the time for reading the data code 21 when the detection mark 22 is detected again.

  When the code reader configured as described above cannot read the code within a certain time after detecting the detection mark (if it cannot acquire the code data), it sends a reading abnormality notification indicating that the reading has failed. Send to. Since the detection mark indicates the presence of the code, when the detection mark is detected, the code reader can recognize that the sheet on which the code is recorded or the screen on which the code is displayed has been turned.

  Therefore, if the code reader cannot read the code despite detecting the detection mark, the code reader can determine that an abnormality has occurred in reading. Therefore, the code reader can output information corresponding to the failure of reading the code by the above operation, and can notify, for example, a reading abnormality notification or mark detection information.

  In addition, when reading data from a two-dimensional code, the code reader needs to accurately detect the coordinates and black and white identification of cells arranged in a grid. On the other hand, the code reader may detect a rough shape in order to detect the detection mark. Therefore, the code reader can easily read the detection mark even when optical blur or camera shake occurs due to the distance between the camera and the two-dimensional code. Therefore, the code reader can determine that the medium has been tampered with but data reading has failed.

  In addition, when a reading abnormality notification or the like is output each time a detection mark is detected, the code reader may output a plurality of reading abnormality notifications or the like with one sneaking operation. In this case, the external device cannot determine how many times the user has overwhelmed the medium. For this reason, the code reader synchronizes the operation of the external device and the operation of the user touching the medium by transmitting a reading abnormality notification or the like when the data is not read at a predetermined time after detecting the detection mark. Can be made.

  In addition, when the code reader detects the detection mark, the code reader transmits a back surface notification indicating that the back surface has been wrinkled. Therefore, the code reader can notify the external device that the user has mistakenly turned the back of the ticket. The code reader can read the detection mark with invisible light. This prevents the user from recognizing the code on the back surface and prevents the back surface from being mistaken.

  Note that all procedures for realizing the above functions and processes can be executed by software. For this reason, by installing and executing this program on the code reader 1 through a computer-readable storage medium storing a program for executing the functions and procedures for realizing the processes, the functions and the processes are performed. Can be realized.

  For example, the processor 11 can read the program from a computer-readable storage medium via the communication unit 16, store the read program, and complete the installation of the program. Alternatively, the processor 11 can download the program from the server via the communication unit 16, store the downloaded program, and complete the installation of the program. Thereby, the processor 11 of the code reader 1 can realize the above processing based on the installed program.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the 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.

  DESCRIPTION OF SYMBOLS 1 ... Code reader, 2 ... Ticket paper, 11 ... Processor, 14a ... 1st timer, 14b ... 2nd timer, 15 ... Camera, 16 ... Communication part, 21 ... Data code, 22a thru | or c ... Detection mark, 23 ... Concealment layer, 24 ... detection code.

Claims (14)

An acquisition unit for acquiring a captured image;
A code reading unit for reading a data code from the captured image;
A mark detection unit for detecting a mark indicating the presence of the data code from the captured image;
When the code reading unit reads the data code, code data corresponding to the data code is output, and when the code reading unit does not read the data code and the mark detection unit detects the mark, A first output unit that outputs predetermined information of one;
A code reader comprising: The first predetermined information is information indicating that reading of the data code has failed, or information indicating that the mark has been detected.
The code reader according to claim 1. The first output unit outputs the first predetermined information when the code reading unit does not read the data code within a first predetermined time after the mark detection unit detects the mark. ,
The code reader according to claim 1 or 2. The first output unit does not output the first predetermined information if the mark detection unit has not detected the mark for a second predetermined time or more after outputting the first predetermined information. ,
The code reader according to any one of claims 1 to 3. The captured image is an image of a medium provided with the data code that is tricked by the code reader;
The first output unit does not output the first predetermined information until the medium is reproduced again after the first predetermined information is output.
The code reader according to any one of claims 1 to 3. The code reading unit reads a detection code,
When the code reading unit reads the detection code, the code reading unit includes a second output unit that outputs second predetermined information.
The code reader according to any one of claims 1 to 5. The second predetermined information is a notification indicating that the back surface of the medium including the data code has been defaced, or detection code detection information indicating detection of the detection code.
The code reader according to claim 6. The detection code is readable with invisible light,
The code reader according to claim 6 or 7. The mark is formed in the data code;
The code reader according to any one of claims 1 to 8. The data code is a two-dimensional code.
The code reader according to any one of claims 1 to 9. The data code is a QR code,
The mark is a finder pattern,
The code reader according to claim 10. Equipped with a camera to take images,
The acquisition unit acquires an image captured by the camera as the captured image.
The code reader according to any one of claims 1 to 11. A communication unit that transmits and receives data to and from external devices
The first output unit transmits the code data or the first predetermined information to the external device through the communication unit.
The code reader according to any one of claims 1 to 12. The data code is formed on a medium,
The medium includes at least one mark in an area other than an area where the data code is formed.
The code reader according to claim 1.