JP6361406B2 - Information code reading system - Google Patents

Description

  The present invention relates to an information code reading system and an information code display device for optically reading an information code displayed on a screen.

  At present, information codes such as barcodes and QR codes (registered trademark) are used for various purposes, and their usage purposes are also diversifying. For example, predetermined information corresponding to the information code can be easily obtained by imaging and optically reading the information code displayed on the screen with a portable terminal with a camera. Furthermore, by distributing the encrypted information code to the user, and displaying the information code distributed by the user on the screen, the presentation destination such as the store provides the service corresponding to the information code and the person himself / herself A system for authentication and value presentation can be constructed.

JP 2007-079781 A

  By the way, if the screen displaying the information code is illegally shot as described above, the information code is easily duplicated, which causes a problem in terms of security and operational safety. For example, if a QR code with monetary information is captured and copied, the monetary information may be used illegally. Further, for example, if an authentication QR code is captured and copied, the authentication information may be used illegally.

  In order to solve this problem, for example, as shown in the divided display method disclosed in Patent Document 1, a two-dimensional code is divided into a plurality of divided two-dimensional codes and displayed, thereby displaying one divided two-dimensional code. The information of the two-dimensional code cannot be acquired only by imaging the code. However, there is a problem that if one information code is simply divided into a plurality of divided codes, the original information code can be restored only by imaging and synthesizing all the divided codes.

The present invention has been made to solve the above problems, and an object is to provide an information code reading system capable of preventing duplication of the information code that is displayed on the screen.

In order to achieve the above object, the invention according to claim 1 of the claims includes an information code display device (20) for displaying an information code (C) and an information code displayed on the information code display device. An information code reading system (10) comprising an optically reading information code reading device (30), wherein the information code display device divides an information code to be displayed into a plurality of divided codes (C1 to C4). A dividing unit (23) for generating, a generating unit (23) for generating synthesis images (P1 to P4) including one of the plurality of divided codes for all the divided codes, and the generating unit Display means (24) for cyclically displaying a plurality of images including the plurality of images for synthesis on a display screen at a first interval, wherein the information code reader displays the display screen on a second screen while Imaging means (33) that continuously captures images and combining means (1) that synthesizes one information code based on the divided codes respectively included in the plurality of images for synthesis among the captured images captured by the imaging means. 35) and decoding means (31) for decoding the information code synthesized by the synthesizing means , wherein the display means includes the divided code in addition to all the images for synthesis as the plurality of images. including other images contain different images, and display cyclically, wherein different images are Oh serving as a reference information in the synthesis of all the divided code at the recording the information encoded by said synthesizing means Rukoto It is characterized by.
In addition, the code | symbol in each said parenthesis shows the correspondence with the specific means as described in embodiment mentioned later.

  According to the first aspect of the present invention, in the information code display device, the information code to be displayed by the dividing means is divided into a plurality of divided codes, and the image for synthesis including one of the plurality of divided codes is divided by the generating means. A plurality of images generated for the code and including a plurality of images for synthesis are cyclically displayed on the display screen at a first interval by the display means. Then, in the information code reading device, the display screen is continuously imaged at the second interval by the imaging unit, and one information code is obtained based on the divided codes respectively included in the plurality of synthesis images captured by the synthesis unit. The combined information code is decoded by the decoding means.

Thus, even if the display screen is simply photographed, only one divided code is imaged, and the information code to be displayed is not imaged. On the other hand, the information code to be displayed can be synthesized by using the information code reader, and the synthesized information code can be decoded. Therefore, duplication of the information code displayed on the screen can be prevented.
Further, the display means cyclically displays a plurality of images including all images for synthesis and other images including an image different from the divided code. Accordingly, even if the display screen is simply photographed, only one divided code or the above-described different image is captured, and the information code to be displayed is not captured, so that duplication of the information code displayed on the screen can be prevented. it can.
In particular, the different image is an information code in which information serving as a reference (hereinafter also referred to as synthesis information) is recorded when all the divided codes are synthesized by the synthesis unit. Thereby, after the display screen is imaged by the imaging means, an image in which a decodable information code is first imaged is extracted, and the information code is decoded, whereby the information for synthesis is acquired. By synthesizing the respective divided codes based on the synthesis information acquired in this way, the synthesis process by the synthesis unit can be easily performed.

In the invention of claim 5 , a plurality of compositing images are cyclically displayed by the display means so that an information code to be displayed can be visually recognized using an afterimage of the divided code. Thereby, even if the display screen on which the information code is visually recognized is photographed, the information code to be displayed is not imaged, so that duplication of the information code displayed on the screen can be prevented. In particular, since the information code is visually recognized from the display screen, the reason why the information code to be displayed is not captured even when the display screen is photographed can be made difficult to grasp.

In the invention of claim 6 , different images are arranged so as to occupy an area corresponding to at least a part of the divided code with respect to other images. As a result, even if a plurality of images obtained by continuously photographing the display screen are simply superimposed, the different images overlap with a part of the information code to be displayed. For this reason, since a decipherable information code cannot be extracted, duplication of the information code displayed on the screen can be reliably prevented.

In the invention of claim 7, the information code to be displayed is divided by the dividing means into division codes that cannot be error corrected. When an information code having an error correction function is divided into a size capable of error correction, even if a region where error correction is possible is lost, the error corrected region may be corrected. In some cases, the information code to be displayed is restored by error correction. Therefore, by dividing each divided code so that the error correction is impossible, even an information code having an error correction function cannot be restored, so that it is possible to reliably prevent duplication of the information code displayed on the screen.

In the invention of claim 2 , a marker indicating that the composition image includes a division code is included in the composition image. For this reason, an image including a marker among a plurality of images picked up by the image pickup means is a composition image. Therefore, it is easily determined whether or not the image is a composition image by checking the presence or absence of the marker. can do.

In the invention of claim 3 , the marker is configured to indicate a position occupied by the divided code with respect to the information code to be displayed. Thereby, since it can be easily grasped which part of the information code to be displayed the divided code imaged together with the marker can be combined with each divided code easily.

In the invention of claim 8 , the display screen is continuously imaged by the imaging means so that the second interval coincides with the first interval. Thereby, when the images for synthesis are displayed one by one by the display means, the images for synthesis are taken one by one by the imaging means, and the images for synthesis and other images are displayed one by one by the display means. In this case, the image for synthesis, another image, and the like are captured one by one by the imaging means. Since the images for synthesis are displayed one by one in this way, all the images for synthesis can be extracted easily and in a short time.

In the invention of claim 4 , one image is generated based on a part of the divided codes respectively included in the plurality of images for synthesis captured by the imaging unit and the remaining divided codes stored in advance in the storage unit. An information code is synthesized. As a result, even if all the divided codes displayed on the display screen are imaged and synthesized, the information code to be displayed cannot be synthesized unless the remaining divided codes are stored in advance. Can be reliably prevented.

1 is a block diagram showing a schematic configuration of an information code reading system according to a first embodiment. It is a block diagram which shows schematic structure of the information code display apparatus of FIG. It is explanatory drawing which shows the relationship between QR Code and each division code. It is explanatory drawing of the image for a synthesis | combination produced | generated so that a division | segmentation code may be included. It is a block diagram which shows schematic structure of the information code reader of FIG. It is a flowchart which illustrates the flow of the reading process of the information code reader in 1st Embodiment. It is explanatory drawing explaining the display state of the display screen in the display process in 2nd Embodiment. It is explanatory drawing explaining the display state of the display screen in the display process in 3rd Embodiment. It is a flowchart which illustrates the flow of the reading process of the information code reader in 3rd Embodiment. It is explanatory drawing explaining the display state of the display screen in the display process in 4th Embodiment.

[First Embodiment]
Hereinafter, a first embodiment in which an information code reading system and an information code display device of the present invention are embodied will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of an information code reading system 10 according to the first embodiment.
The information code reading system 10 according to the present embodiment is a system for preventing duplication of an information code displayed on the screen. The information code reading system 10 includes an information code display device 20 that displays an information code, and an information code reading device 30 that optically reads the information code displayed on the information code display device 20.

  First, the information code display device 20 will be described with reference to FIGS. FIG. 2 is a block diagram showing a schematic configuration of the information code display device 20 of FIG. FIG. 3 is an explanatory diagram showing the relationship between the QR code C and the divided codes C1 to C3. FIG. 4 is an explanatory diagram of a synthesis image generated so as to include a division code. FIG. 4A shows a synthesis image P1 including the first division code C1, and FIG. FIG. 4C illustrates a synthesis image P3 including the third division code C3. FIG. 4C illustrates a synthesis image P3 including the third division code C3. 4A to 4C, the outer shape of the information code before division is illustrated by a two-dot chain line.

  The information code display device 20 according to the present embodiment is a device for displaying a predetermined information code on the screen. The information code display device 20 is a portable information terminal that is carried by a user and used to display each image to be combined, which will be described later, in various places. For example, a portable information terminal in which a predetermined application program is installed. It can be configured by telephone (smartphone). For example, as shown in FIG. 2, the information code display device 20 includes a CPU 21 that performs overall control, a memory 22 including a RAM 22a and a ROM 22b, a drawing frame creation module 23, a display module 24, and a display controller 25. It is equipped with.

  The CPU 21 is configured to control various electrical components by performing various arithmetic processes such as arithmetic operations, logical operations, and display processing described later based on a predetermined program stored in the ROM 22b.

  The RAM 22a is configured to be able to secure a work area used by the CPU 21 for each processing such as arithmetic operation and logical operation, an image data storage area for storing a composite image, which will be described later, and the like. The ROM 22b stores in advance a predetermined program that can execute a display process for displaying an information code, a system program that can control each hardware, and the like.

  The drawing frame creating module 23 is configured as a module that is controlled by the CPU 21 and functions as a dividing unit that divides an information code to be displayed into a plurality of divided codes. Specifically, when the QR code C illustrated in FIG. 3 is stored in the RAM 22a as the information code to be displayed, the drawing frame creation module 23 divides the QR code C into, for example, three divided codes.

  In particular, in the present embodiment, a QR code having a general error correction function is employed as the information code to be displayed. Since the QR code is generated so as to have an error correction function, even if a cell in an error-correctable area (for example, 30%) is missing from each cell constituting the data portion of the QR code, It is possible to restore an area that has been lost due to error correction so that it can be read. For this reason, each divided code is divided into sizes that cannot be error-corrected in order to prevent the QR code from being restored so as to be readable from one divided code.

  Then, the drawing frame creating module 23 generates an image including one of the divided codes (hereinafter also referred to as a composition image) for each divided code divided as described above. For example, when the information code is divided into three divided codes (first divided code C1, second divided code C2, and third divided code C3) as described above, the drawing frame creation module 23 performs the first divided code. A composition image P1 including the code C1 (see FIG. 4A), a composition image P2 including the second divided code C2 (see FIG. 4B), and a composition including the third divided code C3. A work image P3 (see FIG. 4C) is generated.

  As shown in FIG. 4A, when the information code to be displayed is arranged at a reference position (for example, the center of the screen), the composition image P1 has the first divided code C1 for the information code to be displayed. It is generated so that the first divided code C1 is arranged at the occupied position. Further, as shown in FIG. 4B, the composition image P2 has a position occupied by the second divided code C2 with respect to the information code to be displayed when the information code to be displayed is arranged at the reference position. The second divided code C2 is generated so as to be arranged at the same time. As shown in FIG. 4C, the composition image P3 has a position occupied by the third divided code C3 with respect to the information code to be displayed when the information code to be displayed is arranged at the reference position. Is generated so that the third divided code C3 is arranged. Each composition image generated in this way is stored in a predetermined image data storage area of the RAM 22a. The drawing frame creation module 23 may correspond to an example of “generation means”.

  The display module 24 is, for example, a liquid crystal display provided with a display screen 24a, and is configured such that the display content is controlled by a display controller 25 that receives an instruction from the CPU 21. The display module 24 and the display controller 25 may correspond to an example of “display means”.

  Further, as indicated by reference numeral 26 in FIG. 2, the information code display device 20 includes an external communication unit (input) configured as a key operation unit for inputting predetermined information and an interface for communicating with an external device. Output means), a CPU 21 and a power supply unit for supplying power to various electrical components.

Next, a display process executed by the CPU 21 of the information code display device 20 configured as described above will be described.
In the present embodiment, when the display process is executed by the CPU 21, the drawing frame creation module 23 generates an image for synthesis that includes each divided code obtained by dividing the information code to be displayed. Then, the images for synthesis generated as described above are cyclically displayed on the display screen 24a at predetermined display intervals by the display module 24 controlled by the display controller 25.

  Specifically, on the display screen 24a, a display state in which only the compositing image P1 is displayed (see FIG. 4A) and a display state in which only the compositing image P2 is displayed (see FIG. 4B). And the display state (see FIG. 4C) in which only the composition image P3 is displayed is repeated at the predetermined display interval.

  In particular, in the present embodiment, the predetermined display interval is set to a time at which an afterimage phenomenon occurs, for example, 20 ms to 30 ms. Since each of the divided codes C1 to C3 is displayed at a position occupied by the information code to be displayed in the synthesis images P1 to P3, a display screen 24a on which each of the synthesis images P1 to P3 is cyclically displayed is displayed. The viewer visually recognizes that one information code is displayed due to the afterimage phenomenon. On the other hand, when the display screen 24a on which the images for synthesis P1 to P3 are cyclically displayed is captured, any one of the images for synthesis P1 to P3 is captured. The predetermined display interval may correspond to an example of “first interval”.

  In the display process, an information code to be displayed may be displayed on the display screen 24a for a predetermined time according to a predetermined operation.

Next, the information code reading device 30 will be described with reference to FIG. FIG. 5 is a block diagram showing a schematic configuration of the information code reader 30 of FIG.
The information code reading device 30 according to the present embodiment is a device that optically reads an information code, and is installed in a store or the like that provides a predetermined service using the information code. As shown in FIG. 5, the information code reading device 30 includes a CPU 31 that performs overall control, a memory 32 including a RAM 32 a and a ROM 32 b, a camera module 33, a frame image storage module 34, and an information code composition tool 35. It is equipped with.

  The CPU 31 is configured to control various electrical components by performing various arithmetic processes such as arithmetic and logical operations and a reading process described later based on a predetermined program stored in the ROM 32b.

  The RAM 32a is configured so as to be able to secure a work area used by the CPU 31 for each processing such as arithmetic operation and logical operation, an image data storage area for storing captured image data, and the like. The ROM 32b stores in advance a predetermined program that can execute a reading process for reading the QR code C and the like, a system program that can control each hardware, and the like.

  The camera module 33 is configured as an area sensor in which solid-state image sensors such as C-MOS and CCD are two-dimensionally arranged, and is imaged on the imaging surface by executing imaging at a predetermined shutter speed. It functions as an imaging means for converting an optical image of a subject such as an information code into an electrical signal to acquire image data. In the present embodiment, the predetermined shutter speed is set to be shorter than the predetermined display interval (for example, an interval that is ½ of the predetermined display interval). It may correspond to an example of “interval”.

  The frame image storage module 34 is controlled by the CPU 31 and functions to extract and store predetermined image data from a plurality of image data captured and acquired by the camera module 33. In the present embodiment, the frame image storage module 34 extracts frame images described later from a plurality of image data captured by the camera module 33 during the reading process executed by the CPU 31. The frame image extracted in this way is stored in a predetermined image data storage area of the RAM 32a.

  The information code synthesis tool 35 is controlled by the CPU 31 and functions as a synthesis means for synthesizing one information code from each synthesis image stored in the RAM 32a. For example, when the frame images including the images for synthesis P1 to P3 illustrated in FIGS. 4A to 4C are stored in the RAM 32a, the information code synthesis tool 35 performs the QR code C illustrated in FIG. Can be synthesized as an information code to be read.

  In addition, as shown by the reference numeral 36 in FIG. 5, the information code reading device 30 includes an external communication unit (input) configured as a key operation unit for inputting predetermined information and an interface for communicating with an external device. Output means), a CPU 31 and a power supply unit for supplying power to various electric components.

  Next, regarding the reading process executed when the CPU 31 of the information code reading device 30 configured as described above captures each divided code displayed on the information code display device 20 and reads one information code. This will be described with reference to the flowchart shown in FIG. FIG. 6 is a flowchart illustrating the reading process flow of the information code reading device 30 according to the first embodiment. Note that on the display screen 24a of the information code display device 20, it is assumed that the images for synthesis P1 to P3 are cyclically displayed.

  When the user performs a predetermined operation in a state where the display screen 24a of the information code display device 20 is directed to the camera of the camera module 33 so as to be imageable, the CPU 31 starts reading processing. First, an initial setting process shown in step S101 of FIG. 6 is performed. In this process, the number of frame images to be described later, an algorithm in the decoding process, and the like are set according to information input in advance. In particular, in this embodiment, “3” is set as the number of frame images in order to capture the display screen 24a on which the images for synthesis P1 to P3 are cyclically displayed.

  Next, the imaging process shown in step S103 is performed. In this process, the camera module 33 takes a picture at the predetermined shutter speed, and acquisition of image data is started. Thereby, the display state of the display screen 24a is continuously photographed at the predetermined shutter speed. In addition, since it is imaging | photography in a short time, the position which the image of the display screen 24a occupies is constant in all the captured images imaged.

  Subsequently, the frame image acquisition process shown in step S105 is performed. In this process, when image data regarded as the same image is continuously acquired by the frame image storage module 34, one of these images is extracted and acquired as a frame image. Since the predetermined shutter speed is set shorter than the display interval, for example, when one or a plurality of captured images including the composition image P1 are acquired, one captured image including the composition image P1 is obtained. Acquired as a frame image. In step S107, a frame image storage process is performed, and the frame image acquired as described above is stored in the RAM 32a.

  Next, in the determination process shown in step S109, it is determined whether there is a next frame image. In the present embodiment, since the number of frame images is preset, if the number of frame images stored in the RAM 32a is less than the set value (“3”) (Yes in S109), the processing from step S105 is performed. Is repeated. As described above, when only one captured image including the compositing image P1 is acquired as a frame image, the frame image acquisition process is performed again. Then, a captured image including the composition image P2 displayed on the display screen 24a after the composition image P1 is acquired as a frame image and stored in the RAM 32a. At this stage, since two frame images are stored in the RAM 32a, it is determined Yes in step S109, and the frame image acquisition process is performed again. Then, a captured image including the composition image P3 displayed on the display screen 24a after the composition image P2 is acquired as a frame image and stored in the RAM 32a. When a captured image including the composition image P2 is first acquired and stored as a frame image, a captured image including the composition image P3 is acquired as a frame image and then combined. The captured image including the image P1 is acquired and stored as a frame image. When a captured image including the composition image P3 is first acquired and stored as a frame image, the captured image including the composition image P1 is acquired as a frame image and then combined. The captured image including the image for use P2 is acquired and stored as a frame image.

  At this stage, since three frame images are stored in the RAM 32a, it is determined No in step S109, and the image calling process shown in step S111 is performed. In this process, the first stored frame image is read from the RAM 32a. Next, in the determination process shown in step S113, it is determined whether or not a divided code is included in the frame image. In this embodiment, since all the frame images include the image for synthesis, when a frame image including the first divided code C1 together with the image for synthesis P1 is read, it is determined Yes in step S113, The compositing frame image storage process shown in step S115 is performed. In this process, the frame image including the composition image P1 is stored in the RAM 32a as a composition frame image.

  Next, in the determination process shown in step S117, it is determined whether there is a next frame image. Since the frame image including the second divided code C2 is stored in the RAM 32a together with the composition image P2 (Yes in S117), the image calling process is performed again, and the frame image including the composition image P2 is read out. Then, it is stored in the RAM 32a as a compositing frame image (S115). Since the frame image including the third divided code C3 is stored in the RAM 32a together with the composition image P3 (Yes in S117), the image calling process is performed again, and the frame image including the composition image P3 is obtained. It is read out and stored in the RAM 32a as a compositing frame image (S115).

  When all the coma images for compositing are stored in the RAM 32a in this way (No in S117), the compositing process shown in step S119 is performed. In this process, the information code synthesis tool 35 synthesizes one information code from each divided code included in all the compositing frame images stored in the RAM 32a.

  Specifically, since the position occupied by the image on the display screen 24a is constant in all the captured images captured by the camera module 33, all the coma images for synthesis are overlapped on the basis of the image on the display screen 24a. One information code can be synthesized from each divided code. When the images for synthesis P1 to P3 exemplified in FIGS. 4A to 4C are taken, the QR code C shown in FIG. 3 is synthesized.

  When the information code is synthesized as described above, a known decoding process based on the algorithm set in the initial process is performed on the synthesized information code in step S121. By this processing, character data encoded as an information code is decoded and decoded. The CPU 31 that executes the process shown in step S121 may correspond to an example of “decoding means”.

  As described above, in the information code reading system 10 according to the present embodiment, in the information code display device 20, the information code to be displayed by the drawing frame creation module 23 is divided into a plurality of divided codes, and a plurality of divided codes are obtained. A composite image including one of these is generated for all the divided codes, and the display module 24 cyclically displays a plurality of images including a plurality of composite images on the display screen 24a at a predetermined display interval. Then, in the information code reading device 30, the display screen 24a is continuously imaged at a predetermined shutter speed by the camera module 33, and based on the divided codes respectively included in the plurality of synthesis images captured by the information code synthesis tool 35. One information code is synthesized, and the information code synthesized by the decoding process is decoded and decoded.

  Thereby, even if the display screen 24a of the information code display device 20 is simply photographed, only one divided code is imaged, and the information code to be displayed is not imaged. On the other hand, the information code to be displayed can be synthesized by using the information code reader 30, and the synthesized information code can be decoded. Therefore, duplication of the information code displayed on the screen can be prevented.

  In particular, the display module 24 cyclically displays a plurality of compositing images so that an information code to be displayed can be viewed using the afterimage of the divided code. Thereby, even if the display screen 24a in which the information code is visually recognized is photographed, the information code to be displayed is not imaged, so that it is possible to prevent duplication of the information code displayed on the screen. In particular, since the information code is visually recognized from the display screen 24a, it is difficult to grasp the reason why the information code to be displayed is not captured even when the display screen 24a is photographed.

  Further, the information code to be displayed is divided by the drawing frame creating module 23 into a size that cannot be corrected as a divided code. When an information code having an error correction function is divided into a size capable of error correction, even if a region where error correction is possible is lost, the error corrected region may be corrected. In some cases, the information code to be displayed is restored by error correction. Therefore, by dividing each divided code so that the error correction is impossible, even an information code having an error correction function cannot be restored, so that it is possible to reliably prevent duplication of the information code displayed on the screen.

[Second Embodiment]
Next, an information code reading system and an information code display device according to a second embodiment of the present invention will be described with reference to FIG. FIG. 7 is an explanatory diagram for explaining the display state of the display screen 24a in the display processing according to the second embodiment, and FIG. 7A shows the synthesis image P1 including the first divided code C1. 7B shows another image Ps including the sun mark S, FIG. 7C shows a composition image P2 including the second divided code C2, and FIG. 7E shows another image Ps including the sun mark S, FIG. 7E shows a composition image P3 including the third divided code C3, and FIG. 7F includes the sun mark S. Another image Ps to be displayed is shown. 7A to 7F, the outer shape of the information code before division is illustrated by a two-dot chain line.

  The second embodiment is mainly different from the first embodiment in that all images for synthesis and other images including images different from the divided code are cyclically displayed on the display screen 24a. For this reason, substantially the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the display processing in the information code display device 20 according to the present embodiment, when the information code to be displayed is divided into a plurality of divided codes as described above, an image different from the divided code is displayed together with the synthesis image including each divided code. Other images including are generated. Then, each image for synthesis and another image are cyclically displayed on the display screen 24a one by one at the predetermined display interval.

  In the present embodiment, for example, a sun mark S is prepared as a different image. In particular, the sun mark S occupies an area corresponding to a part of the first divided code C1 when the other image and each composition image are overlapped so that the information code to be displayed is a reference, and the center The portion occupies an area corresponding to a part of the second divided code C2, and the lower part occupies an area corresponding to a part of the third divided code C3.

  Then, in the display process, as shown in FIGS. 7A to 7F, the image P1 for synthesis, another image Ps including the sun mark S, the image P2 for synthesis, and the sun mark S are included. The other image Ps, the composition image P3, and the other image Ps including the sun mark S are cyclically displayed on the display screen 24a at the predetermined display interval.

A reading process in the information code reading device 30 performed on the display screen 24a in such a display state will be described with reference to a flowchart shown in FIG.
As described above, since six images are cyclically displayed on the display screen 24a, “6” is set as the number of frame images in the initial processing shown in step S101. Then, through repeated processing from step S105 to step S109, the captured image including the composition image P1, the captured image including the other image Ps, the captured image including the composition image P2, and the other image Ps. The captured image including the image, the captured image including the composition image P3, and the captured image including the other image Ps are each acquired as a frame image and stored in the RAM 32a (S107).

  When a frame image including division codes (see FIGS. 7A, 7C, and 7E) is read, it is determined Yes in step S113, and is stored in the RAM 32a as a compositing frame image. (S115). On the other hand, when a frame image including different images (see FIGS. 7B, 7D, and 7F) is read, it is determined No in step S113 and is not stored in the RAM 32a.

  In the determination process in step S113, for example, it is possible to determine whether or not the frame image includes the division code based on the degree of light and dark variations in the image data. In this case, the determination accuracy in the determination process in step S113 can be improved by creating the different images so that the variation in brightness is different from the variation in brightness in the divided code.

  When all the compositing frame images are stored in the RAM 32a in this way (No in S117), in the compositing process shown in step S119, each divided code included in all the compositing frame images stored in the RAM 32a. From this, one information code is synthesized. In step S121, a decoding process is performed, and character data encoded as an information code is decoded and decoded.

  As described above, in the information code reading system 10 according to the present embodiment, the display module 24 includes, as a plurality of images, all images for synthesis and other images including images different from the divided codes. Are displayed cyclically on the display screen 24a. As a result, even if the display screen 24a is simply photographed, only one divided code or the above-mentioned different image is captured, and the information code to be displayed is not captured, so that duplication of the information code displayed on the screen is prevented. Can do.

  In particular, the different images are arranged so as to occupy an area corresponding to at least a part of the divided code with respect to other images, like the sun mark S described above. As a result, even if a plurality of images obtained by continuously photographing the display screen 24a are simply overlapped, the different images overlap with a part of the information code to be displayed. For this reason, since a decipherable information code cannot be extracted, duplication of the information code displayed on the screen can be reliably prevented.

[Third Embodiment]
Next, an information code reading system and an information code display device according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 8 is an explanatory diagram for explaining the display state of the display screen 24a in the display processing according to the third embodiment, and FIG. 8A shows the synthesis image P1 including the first divided code C1. FIG. 8B shows another image Ps including the sun mark S, FIG. 8C shows a composition image P2 including the second divided code C2, and FIG. FIG. 8 (E) shows a composition image P3 including the third divided code C3, and FIG. 8 (F) shows the sun mark S. The other image Ps contained is shown. FIG. 9 is a flowchart illustrating the reading process flow of the information code reading device 30 according to the third embodiment.

  The third embodiment is mainly different from the second embodiment in that an information code in which information for synthesis is recorded as the different image is employed. For this reason, substantially the same components as those in the second embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the display process in the information code display device 20 according to the present embodiment, when the information code to be displayed is divided into a plurality of divided codes, as in the second embodiment, together with the image for synthesis including each divided code, Another image including an image different from the division code is generated. In particular, in the present embodiment, as one of the different images, an information code (hereinafter, also referred to as synthesis information) in which information (hereinafter also referred to as synthesis information) that is a reference when combining all the divided codes by the information code synthesis tool 35 is recorded. , Also referred to as a composition information code Co). In the present embodiment, information relating to the number of frame images including images for synthesis and other images, and the display order of the images for synthesis and other images is employed as the information for synthesis.

  In the display process in the information code display device 20, another image including different images such as the composition information code Co and the sun mark S and the respective composition images are displayed at the predetermined display intervals one by one. 24a is displayed cyclically. For example, in the examples of FIGS. 8A to 8F, the composition image P1, the other image Ps including the sun mark S, the composition image P2, and the other image Po including the composition information code Co. Then, the composition image P3 and the other image Ps including the sun mark S are cyclically displayed on the display screen 24a at the predetermined display interval.

A reading process in the information code reading device 30 performed on the display screen 24a in such a display state will be described with reference to a flowchart shown in FIG.
In the reading process according to the present embodiment, an algorithm or the like in the decoding process is set in the initial setting process shown in step S101a of FIG. In this embodiment, no setting is made regarding the number of frame images at this stage.

  Next, when the imaging process shown in step S103 is performed, the frame images are sequentially acquired in the frame image acquisition process shown in step S105. Here, if the acquired frame image includes the compositing information code Co, it is determined Yes in step S106, and the compositing information setting process shown in step S106a is performed. In this process, “5” is set as the number of frame images based on information included in the synthesis information obtained by decoding the synthesis information code Co, and the display order of the synthesis image and other images is set. Information is acquired.

  On the other hand, when the composition information code Co is not included in the acquired frame image (No in S106), the acquired frame image is stored in the RAM 32a (S107). Then, through repeated processing from step S105 to step S109, the captured image including the composition information code Co is excluded, the captured image including the composition image P1, the captured image including the other image Ps, and the composition image. The captured image including the image P2, the captured image including the composition image P3, and the captured image including the other image Ps are each acquired as a frame image and stored in the RAM 32a (S107).

  In the determination process shown in step S113, since information regarding the display order of the composite image and other images is acquired from the composite information code Co, it is easy to determine whether or not the frame image includes the divided code. Can be determined. When a frame image including division codes (see FIGS. 8A, 8C, and 8E) is read, it is determined Yes in step S113 and stored in the RAM 32a as a compositing frame image. (S115). On the other hand, when a frame image including different images (see FIGS. 8B and 8F) is read, it is determined No in step S113 and is not stored in the RAM 32a.

  When all the compositing frame images are stored in the RAM 32a in this way (No in S117), in the compositing process shown in step S119, each divided code included in all the compositing frame images stored in the RAM 32a. From this, one information code is synthesized. In step S121, a decoding process is performed, and character data encoded as an information code is decoded and decoded.

  As described above, in the information code reading system 10 according to the present embodiment, one of the different images is used as the synthesis information code Co in which the synthesis information serving as a reference for synthesizing all the divided codes is recorded. Has been. Thereby, after the display of the display screen 24a by the camera module 33 is extracted, an image in which a decipherable information code is first imaged is extracted and the information code is decoded, so that the information for synthesis is acquired (S106a). By synthesizing the divided codes based on the information for synthesis acquired in this way, the synthesis process by the information code synthesis tool 35 can be easily performed.

  Note that the information code adopted as the different image is not limited to the synthesis information code Co, and may be, for example, an information code different from the information code to be simply displayed. Thereby, when the different information code is imaged by the camera module 33, the information different from the information recorded in the information code to be displayed after being successfully decoded is read. If reading of the information code is successful in this way, the duplicator is less likely to notice that an information code different from the information code to be displayed has been captured, so that the effect of preventing duplication of the information code to be displayed can be enhanced.

[Fourth Embodiment]
Next, an information code reading system and an information code display device according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 10 is an explanatory diagram for explaining the display state of the display screen 24a in the display processing according to the fourth embodiment, and FIG. 10A shows the synthesis image P1 including the first divided code C1. FIG. 10B shows another image Ps including the sun mark S, FIG. 10C shows a composition image P2 including the second divided code C2, and FIG. 10E shows another image Ps containing the sun mark S, FIG. 10E shows a composition image P3 containing the third divided code C3, and FIG. 10F shows the fourth divided code C4. The composition image P4 included is shown.

  The fourth embodiment is mainly different from the second embodiment in that a marker is included in the composition image. For this reason, substantially the same components as those in the second embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the display process in the information code display device 20 according to the present embodiment, when the information code to be displayed is divided into a plurality of divided codes as described above, a composition image (FIG. 10A, FIG. Along with (C), (E), and (F)), another image (see FIGS. 10B and 10D) including an image different from the divided code is generated. In particular, each composition image is configured such that a marker is displayed at a predetermined position based on the information code to be displayed.

  This marker functions as a mark indicating that the image including the marker is an image for synthesis, and particularly indicates the position occupied by the divided code included in the image for synthesis with respect to the information code to be displayed. It is configured as follows. Specifically, as shown in FIGS. 10A, 10 </ b> C, 10 </ b> E, and 10 </ b> F, when the QR code C is divided into four, the synthesis includes the first divided code C <b> 1 corresponding to the upper left portion. A circular marker M1 in which only the upper left is painted black is arranged in the image P1. In addition, a circular marker M2 in which only the upper right portion is painted black is arranged in the composition image P2 including the second divided code C2 corresponding to the upper right portion. In addition, a circular marker M3 in which only the lower left is painted black is arranged in the composition image P3 including the third divided code C3 corresponding to the lower left part. Further, a circular marker M4 in which only the lower right portion is painted black is arranged in the composition image P4 including the fourth divided code C4 corresponding to the lower right portion.

  In the display process, as shown in FIGS. 10A to 10F, the image P1 for synthesis, another image Ps including the sun mark S, the image P2 for synthesis, and the sun mark S are included. The other image Ps, the composition image P3, and the composition image P4 are cyclically displayed on the display screen 24a at the predetermined display interval.

A reading process in the information code reading device 30 performed on the display screen 24a in such a display state will be described with reference to a flowchart shown in FIG.
As described above, since six images are cyclically displayed on the display screen 24a, “6” is set as the number of frame images in the initial processing shown in step S101. Then, through repeated processing from step S105 to step S109, the captured image including the composition image P1, the captured image including the other image Ps, the captured image including the composition image P2, and the other image Ps. , A captured image including the composition image P3, and a captured image including the composition image P4 are each acquired as a frame image and stored in the RAM 32a (S107).

  Then, when the frame image is read from the RAM 32a in the image calling process shown in step S111, the division code is included in the determination process shown in step S113 based on whether or not the marker is included in the frame image. It is determined whether or not. When a frame image including markers (see FIGS. 10A, 10C, 10E, and 10F) is read, it is determined Yes in step S113, and is stored in the RAM 32a as a compositing frame image. Stored (S115). On the other hand, when a frame image that does not include a marker (see FIGS. 10B and 10D) is read, it is determined No in step S113 and is not stored in the RAM 32a.

  When all the compositing frame images are stored in the RAM 32a in this way (No in S117), in the compositing process shown in step S119, each divided code included in all the compositing frame images stored in the RAM 32a. From this, one information code is synthesized. In the present embodiment, in the synthesis process, the divided codes C1 to C4 are synthesized based on the positions occupied by the divided codes grasped from the markers M1 to M4 with respect to the information code to be displayed. In step S121, a decoding process is performed, and character data encoded as an information code is decoded and decoded.

  As described above, in the information code reading system 10 according to the present embodiment, the composition image includes the markers (M1 to M4) indicating that the composition image includes a division code. For this reason, an image including a marker among a plurality of images captured by the camera module 33 is a composition image. Therefore, it is easy to check whether the image is a composition image by checking the presence or absence of the marker. Judgment can be made.

  In particular, the markers (M1 to M4) are configured to indicate the position occupied by the divided code with respect to the information code to be displayed, and therefore correspond to which part of the information code to be displayed by the divided code imaged together with the marker. Since it can be easily grasped, the synthesis process (S119) of each divided code can be easily performed.

  The marker is not limited to being arranged in a circular shape, but may be arranged in another shape, for example, an external shape similar to the information code to be displayed. In addition, the marker may be configured by using a part of the divided code such as a position detection pattern (FP pattern) included in the QR code.

  In addition, the markers included in each composition image may have the same shape, and may simply be arranged to function as a mark indicating that the division code is included in the image. For example, the markers included in each composition image may be composed of information codes having the same shape.

  In addition, the characteristic configuration of the present embodiment in which the marker is included in the image for synthesis may be applied to other embodiments.

[Fifth Embodiment]
Next, an information code reading system and an information code display device according to a fifth embodiment of the present invention will be described.
The fifth embodiment is mainly different from the first embodiment in that the remaining divided codes are stored in the RAM 32a in advance. For this reason, substantially the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the present embodiment, some of the divided codes are cyclically displayed in the display process in the information code display device 20, and the remaining divided codes are stored in advance in the RAM 32 a of the information code reading device 30. ing. In the present embodiment, for example, when the information code to be displayed is divided into three divided codes C1 to C3 like the QR code C illustrated in FIG. 3, the synthesis image P1 including the first divided code C1 and The composition image P2 including the second divided code C2 is cyclically displayed on the display screen 24a. The third divided code C3 is stored in advance in the RAM 32a as the remaining divided code. The RAM 32a may correspond to an example of “storage means”.

A reading process in the information code reading device 30 performed on the display screen 24a in such a display state will be described with reference to a flowchart shown in FIG.
Since two images are cyclically displayed on the display screen 24a as described above, “2” is set as the number of frame images in the initial process shown in step S101. Then, through repeated processing from step S105 to step S109, the captured image including the compositing image P1 and the captured image including the compositing image P2 are each acquired as a frame image and stored in the RAM 32a (S107). ).

  Then, when each frame image including the division code is read and stored in the RAM 32a as a compositing frame image (No in S117), the compositing process shown in step S119 is performed. In the synthesizing process in this embodiment, the information code synthesizing tool 35 stores each divided code (partial divided code) included in all the compositing frame images stored in the RAM 32a in step S115 and the RAM 32a in advance. One information code is synthesized from the divided code (the remaining divided code). In step S121, a decoding process is performed, and character data encoded as an information code is decoded and decoded.

  As described above, in the information code reading system 10 according to the present embodiment, the information code synthesizing tool 35 stores a part of the divided codes included in each of the plurality of synthesis images captured by the camera module 33 and the RAM 32a. One information code is synthesized based on the remaining division code stored in advance. As a result, even if all the divided codes displayed on the display screen 24a are imaged and synthesized, the information code to be displayed cannot be synthesized unless the remaining divided codes are stored in advance. It is possible to reliably prevent code duplication.

  The remaining division code stored in advance in the RAM 32a is not limited to one, but may be plural. The remaining divided codes may be acquired by communicating with an external device and stored in the RAM 32a.

  The characteristic configuration of the present embodiment in which the remaining divided codes are stored in advance in the RAM 32a may be applied to other embodiments.

In addition, this invention is not limited to said each embodiment, For example, you may actualize as follows.
(1) The shutter speed (second interval) of the camera module 33 is not limited to be set to be shorter than the predetermined display interval on the display module 24, but is set to be longer than the predetermined display interval. It may be set to match a predetermined display interval. In particular, in a configuration in which the shutter speed (second interval) of the camera module 33 is set so as to coincide with a predetermined display interval, the camera module 33 is displayed when images for synthesis are displayed one by one by the display module 24. When the image for synthesis is taken one by one and when the image for synthesis or another image is displayed one by one by the display module 24, the image for synthesis or another image is taken one by one by the camera module 33. Is done. Since the images for synthesis are displayed one by one in this way, all the images for synthesis can be easily and quickly extracted in the frame image acquisition process shown in step S105.

(2) Each divided code is displayed in a predetermined color by the display module 24, and a captured image is generated by the camera module 33 using a filter excluding a color different from the predetermined color, whereby each divided code is displayed. You may make it extract. For example, each divided code can be extracted by displaying each divided code using the three primary colors and using a filter excluding the colors other than the three primary colors in consideration of the color composite value.

(3) The information code to be displayed is not limited to being configured as a QR code, but may be configured as an information code of another code type, for example, a two-dimensional code such as a data matrix code, a maxi code, It may be configured as a one-dimensional code such as a barcode.

(4) The present invention is not limited to a configuration in which a store or the like that provides a predetermined service owns the information code reading device 30 and a user such as a consumer who receives the service owns the information code display device 20. Instead, the store or the like may own the information code display device 20, and the user may have the information code reading device 30. In this case, the store or the like uses the information code display device 20 to cyclically display the composition image or the like corresponding to the service, so that the user can use the information code display device 20 from the composition image or the like. The information code to be synthesized can be read to receive services such as authentication.

DESCRIPTION OF SYMBOLS 10 ... Information code reading system 20 ... Information code display apparatus 21 ... CPU
23 ... Drawing frame creation module (dividing means, generating means)
24 ... display module (display means)
24a ... display screen 30 ... information code reading device 31 ... CPU (decoding means)
33 ... Camera module (imaging means)
35 ... Information code synthesis tool (synthesizing means)
C ... QR code (information code to be displayed)
C1 to C4: Divided code P1 to P4: Composition image

Claims (8)

An information code reading system comprising: an information code display device that displays an information code; and an information code reader that optically reads the information code displayed on the information code display device,
The information code display device includes:
A dividing means for dividing the information code to be displayed into a plurality of divided codes;
Generating means for generating an image for synthesis including one of the plurality of divided codes for all the divided codes;
Display means for cyclically displaying a plurality of images including the plurality of synthesis images generated by the generation means on a display screen at a first interval;
The information code reader is
Imaging means for continuously imaging the display screen at a second interval;
Synthesizing means for synthesizing one information code based on the division code included in each of the plurality of synthesizing images among the captured images taken by the imaging means;
Decryption means for decrypting the information code synthesized by the synthesis means;
Equipped with a,
The display means cyclically displays, as the plurality of images, including all images for synthesis and other images including images different from the divided codes,
The different images, all the information code reading system for the Oh Rukoto wherein the reference information serving as code information was recorded in the synthesis of the divided codes by said combining means. An information code reading system comprising: an information code display device that displays an information code; and an information code reader that optically reads the information code displayed on the information code display device,
The information code display device includes:
A dividing means for dividing the information code to be displayed into a plurality of divided codes;
Generating means for generating an image for synthesis including one of the plurality of divided codes for all the divided codes;
Display means for cyclically displaying a plurality of images including the plurality of synthesis images generated by the generation means on a display screen at a first interval;
The information code reader is
Imaging means for continuously imaging the display screen at a second interval;
Synthesizing means for synthesizing one information code based on the division code included in each of the plurality of synthesizing images among the captured images taken by the imaging means;
Decryption means for decrypting the information code synthesized by the synthesis means;
With
An information code reading system, wherein the composition image includes a marker indicating that the composition image includes the division code. The information marker reading system according to claim 2 , wherein the marker is configured to indicate a position occupied by the divided code with respect to the information code to be displayed. An information code reading system comprising: an information code display device that displays an information code; and an information code reader that optically reads the information code displayed on the information code display device,
The information code display device includes:
A dividing means for dividing the information code to be displayed into a plurality of divided codes;
Generating means for generating an image for synthesis including one of the plurality of divided codes for all the divided codes;
Display means for cyclically displaying a plurality of images including the plurality of synthesis images generated by the generation means on a display screen at a first interval;
The information code reader is
Imaging means for continuously imaging the display screen at a second interval;
Synthesizing means for synthesizing one information code based on the division code included in each of the plurality of synthesizing images among the captured images taken by the imaging means;
Decryption means for decrypting the information code synthesized by the synthesis means;
With
The generating unit generates the synthesis image for each of a part of the plurality of divided codes divided by the dividing unit,
The information code reading device includes a storage unit that stores in advance a remaining divided code from which the composition image is not generated,
The synthesizing unit includes one piece of information based on the partial division codes included in each of the plurality of synthesis images captured by the imaging unit and the remaining division codes stored in advance in the storage unit. An information code reading system characterized by synthesizing a code.   The said display means displays the said several image for a synthesis | combination cyclically so that the said information code which should be displayed can be visually recognized using the afterimage of the said division | segmentation code | cord | chord The information code reading system according to any one of the above.   The information according to claim 1, wherein the different image is arranged so as to occupy an area corresponding to at least a part of the divided code with respect to the other image. Code reading system. The information code to be displayed has an error correction function,
The information code reading system according to any one of claims 1 to 6, wherein the dividing unit divides the information code to be displayed into a size that cannot be error-corrected as the divided code.   The information according to claim 1, wherein the imaging unit continuously images the display screen so that the second interval coincides with the first interval. Code reading system.

Images