JP2006236134A - Two-dimensional code and two-dimensional code display medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform stable code recognition processing without using a complicated image processing algorithm even if the direction of a display medium changes. <P>SOLUTION: This two-dimensional code display medium includes a data description part DT for arranging a plurality of cells in two dimensions and setting these cells to either first or second color, thereby representing a code, wherein picking symbols SS, SE for showing the existing direction of the data description part DT by the shape and inherent color are disposed at both ends of the data description part DT. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a two-dimensional code used for identifying a card on which an opinion is described and a display medium for displaying the two-dimensional code in a system that supports a conference or workshop that employs an opinion aggregation method, for example.

  The KJ method is known as one of the opinion gathering methods used in meetings and workshops. The KJ method writes ideas and opinions from brainstorming, etc., and miscellaneous information collected from various survey sites one by one on a small card (out of paper), and those with similar contents from each other In the work of collecting and grouping, we try to generate hints and inspirations that help solve the theme.

  The basic procedure of the KJ method is shown below. First, participants write data such as ideas and collected information on a small card one by one. Next, the created cards are arranged on a desk or the like, and a group is created by collecting cards whose contents written on the cards are similar. In addition, a nameplate summarizing the contents is attached to each created group. In the card group organization, first, a small group is created, then a small group is created as a middle group, and then a middle group is created as a large group. When the KJ method is used in this way, it is possible to collect various opinions while repeating the grouping of cards and derive hints useful for the theme solution.

  By the way, recently, in meetings and workshops using the KJ method, an attempt has been made to record the process of collecting opinions and to reuse the recorded information for a virtual meeting or the like later. As a process recording method, for example, a video camera is used to capture an image of a card grouping process, and a movement history of each card is detected and recorded from the captured image data. At that time, a code for identifying the card is printed on each card, and the movement history of each card is detected by performing image processing on the captured image data and recognizing the code. Yes. As the code, a general-purpose one-dimensional barcode or a two-dimensional barcode such as a QR code having information in the horizontal and vertical directions is used (see, for example, Non-Patent Document 1).

http://www.keyence.co.jp/barcode/2jigenbasic/chishiki4.html

  However, in meetings and workshops using the KJ method, the orientation of each card placed on the desk or wall varies, and this orientation changes each time the card is moved. For this reason, in a conventional system using an existing code, the code may not be recognized correctly depending on the orientation of the card. In addition, in order to recognize correctly, for example, it may be possible to perform a code recognition process after correcting the inclination of image data according to the orientation of the card, but this makes the code recognition process complicated. Another problem is that it requires an algorithm and a lot of processing time.

  The present invention has been made paying attention to the above circumstances, and its purpose is to enable stable code recognition processing without using a complicated image processing algorithm even if the orientation of the display medium changes, In particular, it is an object of the present invention to provide a two-dimensional code and a two-dimensional code display medium suitable for use in the recording process of the opinion gathering process.

  In order to achieve the above object, a two-dimensional code and a two-dimensional code display medium according to the present invention are arranged by two-dimensionally arranging a plurality of cells and setting these cells to one of the first and second colors. A code data description part that expresses a code is provided, and a position detection pattern part that indicates the position of the code data description part is arranged at both ends of the code data description part.

  Therefore, according to the present invention, the code data description part can be found using the position detection pattern part indicating the position of the code data description part. For this reason, when recognizing a two-dimensional code by image processing from image data including a two-dimensional code, even if the direction of the two-dimensional code is rotated in an arbitrary direction, the image data is not subjected to inclination correction or the like. The code data description part can be detected with high probability, and the code data can be decoded. Therefore, a two-dimensional code can be recognized easily and efficiently in a short time without using a complicated image processing algorithm.

  Further, the code data description unit expresses code data by two-dimensionally arranging a plurality of cells and changing the colors of these cells. For this reason, it is not necessary to identify the code width with high accuracy unlike a one-dimensional code, and the code can be accurately recognized by a relatively simple image recognition process.

The present invention is also characterized by including the following various specific configurations.
In the first configuration, a check pattern representing the validity of a two-dimensional code is included in the code data description section. If comprised in this way, when analyzing a code data description part, it will become possible to determine the validity of a two-dimensional code by the said check pattern. Therefore, for example, when an image pattern similar to the code data description portion exists in the medium image data due to the influence of image noise or the like, it can be prevented from being erroneously recognized as an immediate code data description portion.

  In the second configuration, the position detection pattern portion is provided with a direction indication pattern that represents the direction in which the code data description portion exists by a shape. With this configuration, the position detection pattern portion can be detected quickly and accurately by the direction indication pattern, and the direction of the code data description portion can be easily and reliably recognized by the shape of the direction indication pattern. It becomes.

  In the third configuration, the position detection pattern portion is set to a third color unique to the position detection pattern portion. When configured in this manner, the position detection pattern portion can be detected by the above color without depending only on the shape, and even when an image pattern having a shape similar to the position detection pattern is included in the medium image data, It becomes possible to detect the position detection pattern more accurately.

  In short, the present invention includes a code data description unit that expresses a code by two-dimensionally arranging a plurality of cells and setting these cells to one of the first and second colors. A position detection pattern portion indicating the direction in which the code data description portion exists is arranged at both ends.

  Therefore, according to the present invention, stable code recognition processing can be performed without using a complicated image processing algorithm even if the orientation of the display medium changes, and this is particularly suitable for use in the recording process of the opinion aggregation process. A two-dimensional code and a two-dimensional code display medium can be provided.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing an embodiment of a conference support system which is one of uses of a two-dimensional code according to the present invention. In this system, a board imaging device VI and a card imaging device CA are connected to a server device SV via a signal cable, and user terminals PC1 to PCk can be connected to the server device SV via a communication network NW. It is. The communication network NW is composed of, for example, the Internet or a LAN (Local Area Network). The server device SV has a function as a conference information management device. The video data captured by the board imaging device VI is cabled. And a function of capturing image data captured by the card imaging apparatus CA via a cable.

  The user terminals PC1 to PCk are configured by a personal computer and include a display device and input devices such as a keyboard and a mouse. These user terminals PC1 to PCk communicate with the server device SV via the communication network NW, and are used to view the conference information distributed by the user who is the conference viewer in a virtual environment.

  FIG. 2 is a diagram showing how conference information is recorded in the system shown in FIG. In the figure, a board 1 is provided on a desk or a wall, and an opinion collecting process by the KJ method or the like is executed on the board 1. In this process, for example, cards 21 to 2i on which opinions are entered are placed on the board 1, and these cards 21 to 2i are manually moved on the board 1 by the participants so that the entered opinions are close to each other. This is done by forming a group between each other. The board 1 may be a commercially available white board, imitation paper, or the like, or may use the wall or desk of the venue as it is.

  The cards 21 to 2i are provided with an opinion entry area 21A and a card identification area 21B, for example, as shown in FIG. The opinion entry area 21A is an area where conference participants write their opinions using a pen or the like. A two-dimensional code is displayed in the card identification area 21B. The two-dimensional code includes individual identification information unique to each card (hereinafter referred to as a card ID), and is printed on the card in advance. The cards 21 to 2i are not limited in shape and material as long as opinions can be entered using a writing instrument such as a pen. For example, commercially available sticky notes with an adhesive can be used.

The board imaging device VI is composed of, for example, a video camera capable of capturing moving images, and images the entire board 1 on which opinions are aggregated over time. Then, the board video data and digital audio data obtained by this imaging are sent to the server apparatus SV via, for example, a DV cable.
The card imaging device CA is constituted by, for example, a digital still camera, and images the cards 21 to 2i one by one. Then, the card image data obtained by this imaging is sent to the server device SV via, for example, a USB cable.

  The server device SV stores board video data sent from the board imaging device VI and card image data sent from the card imaging device CA. Then, the stored card image data is read, and the two-dimensional code displayed in the card identification area 21B is recognized by the image recognition process to decode the card ID. Next, the card IDs included in the board video data and the card image data are compared, and if they match, the position of the card on the board video data is detected. Then, the detected position information of the card is stored in the memory included in the server device SV as movement history information. The conference information data is reconstructed from the card movement history information and the card image data stored in this manner and distributed to the user terminals PC1 to PCk.

By the way, the two-dimensional code displayed in the card identification area 21B of the cards 21 to 2i is configured as follows. FIG. 4 shows the configuration.
That is, the two-dimensional code includes a data description part DT in which a plurality of cells are two-dimensionally arranged, and cutout symbol parts SS and SE arranged at both ends thereof. A cell of the data description part DT is an element of a minimum unit representing a code, and is configured by a square, for example. Each cell is displayed in white or black to represent 1-bit information, and a card ID is represented by a collection of such cells.

  The cut-out symbol parts SS and SE are used to find the position of the data description part DT on the card 21 when recognizing a two-dimensional code, and form a direction indication pattern indicating the direction in which the data description part DT exists. . For example, as shown in FIG. 4, the direction indicating pattern is formed by combining a pattern shape of “reverse U shape” and “U shape”. Note that the pattern shape of the direction indicating pattern of the cutout symbol portions SS and SE is not limited to “reverse U type” and “U type”, but a combination of “<type” and “> type” Any combination of shapes can be used as long as it indicates the direction in which the data description part DT exists, such as a combination of “→” and “←”. The direction indicating pattern is colored in a unique color. As this unique color, a color that is not used in the conference support system is selected.

On the other hand, an apparatus for creating the two-dimensional code is configured as follows. FIG. 5 is a block diagram showing the functional configuration.
That is, the two-dimensional code creation device includes a central processing unit (CPU) 11 such as a microprocessor. A data memory 13, a program memory 14, and a data memory 14 are connected to the CPU 11 via a bus 12, and an input interface (input I / F) 15, an output interface (output I / F) 16, and a transmission interface (transmission) Input I / F) 17 is connected.

  An input device 18 such as a keyboard or a mouse is connected to the input I / F 15, and the input I / F 15 has a function of capturing information input by the user in the input device 18. An image input device such as a scanner for inputting image data is also connected to the input I / F 15.

  A display 19 and a printer 20 are connected to the output I / F 16. The output I / F 16 displays the created two-dimensional code and scale square image data, which will be described later, on the display 19 under the control of the CPU 11, and outputs the data to the printer 20 for printing on the cards 21 to 2i.

  Under the control of the CPU 11, the transmission I / F 17 transfers the created symbol template information and code attribute information described later to the code recognition device BS as information necessary for the code recognition process. In the conference support system, the code recognition device BS is provided in the server SV, but may be provided alone.

  The data memory 14 uses, for example, a RAM or a hard disk as a storage medium, and includes a creation condition storage area 14a, a two-dimensional code storage area 14b, a symbol template storage area 14c, a scale square storage area 14d, and a code attribute. And a data storage area 14e.

  On the other hand, the program memory 13 includes, as application programs according to the present invention, a creation condition input control program 13a, a symbol size control program 13b, a symbol template creation program 13c, a two-dimensional code creation program 13d, and a scale square. A creation program 13e and a data output control program 13f are stored.

  Prior to the creation of the two-dimensional code, the creation condition input control program 13a takes in the creation conditions input at the input device 18 via the input I / F 15 and stores them in the creation condition storage area. As the creation conditions to be input, the length [pixels] of one side of the cell, the information representing the cell arrangement, the image data representing the shape and color of the cutout symbol portions SS and SE, and the numeric data representing the card ID There is. Of these, information representing the cell array is represented by the number of columns and the number of rows of cells. Also, bitmap image data is used as the image data representing the shape and color of the cutout symbol portions SS and SE.

  When creating the two-dimensional code, the symbol size control program 13b performs adjustment for adjusting the size of the clipping symbol parts SS and SE to the size of the data description part DT. The two-dimensional code creation program 13d creates a two-dimensional code according to the creation conditions stored in the creation condition storage area 14a, and stores the created two-dimensional code in the two-dimensional code storage area 14b.

  The symbol template creation program 13c creates a symbol template required when the code recognition device BS recognizes a two-dimensional code, and stores the created symbol template in the symbol template storage area 14c. The symbol template includes image data representing the shape and color of the cutout symbol portions SS and SE, the side length [pixels] of the cutout symbol portions SS and SE, and the distance between the cutout symbol portions SS and SE [pixels]. ].

  The scale square creation program 13e creates information representing the scale square necessary when the code recognition device BS recognizes the two-dimensional code, and stores the information representing the created scale square in the scale square storage area 14d. Remember. The information indicating the scale square includes square image data having a short side length of the two-dimensional code created by the two-dimensional code creation program 13d as one side, and the long side length of the created two-dimensional code. It consists of square image data with one side.

  The data output control program 13f displays the two-dimensional code stored in the two-dimensional code storage area 14b and the information indicating the scale square stored in the scale square storage area 14d via the output I / F 16. 19 and the printer 20 prints on the cards 221 to 2i.

  Further, the data output control program 13f transfers the symbol template stored in the symbol template storage area 14c and the code attribute data stored in the code attribute data storage area 14e from the transmission I / F 17 to the code recognition device BS. . The code attribute data includes the cell side length [pixels] input as the creation condition and the cell array information, and the two-dimensional code calculated when the two-dimensional code is created by the two-dimensional code creation program 13d. The length in the long side direction and the length in the short side direction are included.

Next, the operation of the two-dimensional code creation device configured as described above will be described. FIG. 6 is a flowchart showing the creation procedure and contents.
First, the operator operates the input device 18 to input the length [pixels] of one side of the cell and information indicating the cell arrangement. Then, the CPU 11 of the two-dimensional code creation device executes the creation condition input control program 13a in step 6a, and represents the length [pixels] of one side of the cell input via the input I / F 15 and the cell array. Information is taken in and stored in the creation condition storage area 14a. The information representing the cell arrangement is represented by the number of columns and the number of rows of cells as described above.

  In step 6b, the CPU 11 first creates the data description part DT based on the stored length [pixels] of one side of the cell and the number of columns and rows of the cell. For example, if the length of one side of an input designated cell is w [pixels] and the number of columns and the number of cells are m and n, respectively, a data description part as shown in FIG. 10 is created. In step 6c, the line width of the data description portion DT created as described above, that is, n × w [pixels] in the case of FIG. 10 is detected in units of pixels, and this value is the entire code that is one of the code attribute data. Is stored in the code attribute data storage area 14e in step 6d.

  Next, the CPU 11 creates a check pattern CP at a predetermined position in the created data description part DT. For example, as shown in FIG. 11, the upper left 4 (2 × 2) cell in the data description part DT is used as a check pattern description area. Of the four cells in the check pattern description area, only the upper left one cell is set to “black” and the other three cells are set to “white” as shown in FIG. These four cells function as a check pattern CP.

  Subsequently, the CPU 11 waits for an operator to input a card ID. When the card ID is input in this state, the input card ID is fetched through the input I / F 15 in step 6f, and the creation condition storage area 14a. To remember. Then, in step 6g, the two-dimensional code creation program 13d is executed, whereby the code data is written into the created data description part DT. FIG. 7 is a flowchart showing the processing procedure and processing contents.

  That is, first, in step 7a, the input card ID is converted into a binary number. Next, in step 7b, all the cells in the data description part DT excluding the check pattern CP are initialized to “white”, and are the lowest row and the rightmost end of the initialized data cell group. Are selected (step 7c). Then, “white” or “black” is written in the selected lowermost cell according to the value of the lowest digit of the card ID (step 7d). For example, if the binary value of the card ID is “0”, “white” is written, while if it is “1”, “black” is written.

  Next, in step 7e, the writing position is shifted to the left by one cell, and “white” or “black” is written into the cell according to the value of the second digit of the card ID. Thereafter, similarly, each time the writing position is shifted to the left in order, “white” or “black” is written into the cell according to the value of each digit of the card ID. When the writing to the leftmost cell is completed, the rightmost cell in the second row from the bottom is selected, and “white” or “black” is written in this cell according to the value of the card ID. In this way, every time the position of the cell to be written is shifted from right to left and further from the lower row to the upper row, “white” or “black” is written according to the value of each digit of the card ID. When the writing of all the digits of the card ID is finished, this is detected in step 7f, and the writing of the code data to the data description part DT is finished.

  Next, in step 6h, the CPU 11 accepts input of bitmap image data of the cutout symbol portions SS and SE. Then, the CPU 11 executes the symbol size control program 13b in step 6i to adjust the size of the input cutout symbol parts SS and SE. This size adjustment is performed in order to match the size of the input cutout symbol parts SS and SE with the length of the entire code stored in the code attribute data storage part 14e in the short side direction (line width of the data description part DT). It is performed by enlargement or reduction processing.

  For example, as shown in FIG. 12, if the size of the input cut-out symbol part SSa is “a” and the line width of the data description part DT is “b”, the size of the input cut-out symbol part SSa Is reduced by a factor of b / a × 100 [%] to generate SSb. Similarly, the cut-out symbol part SEa is reduced by applying the same magnification to generate SEb.

  Then, in step 6j, the cut out symbol parts SSb and SEb whose sizes have been adjusted are arranged at both ends of the data description part DT as shown in FIG. At this time, an interval of one cell is provided between each cut-out symbol part SSb, SEb and the data description part DT, for example, as shown in FIG.

  Thus, a two-dimensional code is created. The created two-dimensional code is stored in the two-dimensional code storage area 14b. FIG. 13 shows an example of the two-dimensional code created as described above. As shown in the figure, the two-dimensional code has cutout symbol parts SSb and SEb arranged at the left and right ends of the data description part DT, respectively, and the cutout symbol parts SSb and SEb indicate the existence direction of the data description part DT. It has a “reverse U-shaped” and “U-shaped” pattern shapes, and is colored in a unique color.

  At this time, the CPU 11 detects the length of the created two-dimensional code in units of pixels in step 6k, and uses this value as the length in the long side direction of the entire code as one of the code attribute data. Store in the attribute data storage area 14e.

  Finally, the CPU 11 executes the data output control program 13e in step 6m, reads the two-dimensional code stored in the two-dimensional code storage area 14b, and supplies it to the display via the output I / F 16 for display. In addition, a two-dimensional code can be supplied to the printer 20 via the output I / F 16 and printed on a card.

  Further, the two-dimensional code creating apparatus according to this embodiment, when the creation of the two-dimensional code is completed, continuously creates information representing the symbol template and the scale square. FIG. 8 is a flowchart showing symbol template creation control procedures and contents, and FIG. 9 is a flowchart showing information creation control procedures and contents representing scale squares.

  First, when creating a symbol template, the CPU 11 executes a symbol portion plate creation program 13c. That is, first, in step 8a, image data representing the shape and color of the cutout symbol portions SS and SE are read from the creation condition storage area 14a. Next, in step 8b, the length in the short side direction of the previously created two-dimensional code is read from the code attribute data storage area 14e, and in step 8c based on the read length in the short side direction. The sizes of the cutout symbol parts SSb and SEb are calculated. In step 8d, the length in the long side direction of the previously created two-dimensional code is read from the code attribute data storage area 14e, and cut out in step 8e based on the read length in the long side direction. The distance between the symbol parts SSb and SEb for use is calculated. FIG. 14 shows an example of information representing the symbol part plate created as described above.

  Finally, in step 8f, the data output control program 13e is executed, and the read image data representing the shape and color of the cutout symbol portions SS and SE, and the calculated cutout symbol portions SSb and SEb. The size [pixels] and the calculated distance [pixels] between the cutout symbol parts SSb and SEb are transferred from the transmission I / F 17 to the code recognition device BS as information representing the symbol part plate.

  Next, when creating information representing the scale square, the CPU 11 executes the scale square creation program 13e. That is, first, in step 9a and step 9b, the length in the short side direction and the length in the long side direction of the two-dimensional code are read from the code attribute data storage area 14e, respectively. Subsequently, in step 9c, the first image data having a square with the length in the long-side direction read out as one side and the second image data having a square with the length in the short-side direction as one side are respectively obtained. create. For example, if the length in the short side direction of the two-dimensional code is b and the length in the long side direction is c, bitmap-format image data representing a square as shown in FIG. 15 is created.

  The first image data is used when a two-dimensional code is recognized from the board image data, while the second image data is used when a two-dimensional code is recognized from the card image data. By preparing two types of scale square images of different sizes and using these images separately for board image data and card image data, board image data containing a large number of two-dimensional codes in small sizes. It is possible to recognize the two-dimensional code efficiently and accurately even from the inside or from the card image data containing only one relatively large size two-dimensional code.

  In step 9d, the CPU 11 executes the data output control program 13e, and causes the display 19 to display the first and second scale square image data created as described above via the output I / F 16. At the same time, the first and second scale square image data are added to the board image data and the card image data, respectively, and supplied to the printer 20 for printing.

  As described above, in this embodiment, the data description part DT in which a plurality of cells are two-dimensionally arranged and these cells are set to white or black according to each bit value of the card ID, and the data For cut-out, which is arranged at both ends of the description part DT, has a pattern shape of “reverse U type” and “U type” indicating the existence direction of the data description part DT, and this pattern is colored in a unique color It consists of symbol parts SS and SE.

  Therefore, by arranging the cutout symbol parts SS and SE indicating the existence direction of the data description part DT at both ends of the data description part DT, even if the card size is small or the card is tilted, The data description part DT can be detected with a high probability by the cutout symbol parts SS and SE, whereby the card can be identified efficiently and accurately.

  In addition, since the colors of the cutout symbol portions SS and SE are set to unique colors, the cutout symbol portions SS and SE can be easily detected in a short time from card image data including various information. It becomes possible to do. Further, as shown in FIGS. 4 and 13 and the like, the pattern shape of the cutout symbol parts SS and SE is a combination of “reverse U type” and “U type” indicating the direction in which the data description part DT exists. Is set. Therefore, if one of the cutout symbol portions SS and SE is found, it is possible to specify the direction in which the data description portion DT exists based on the pattern shape, thereby further improving the recognition efficiency. it can.

  In addition, the data description unit DT two-dimensionally arranges a plurality of cells having a predetermined size and number of cells according to the specified creation conditions, and uses these cells to set the bit value of the card ID as white or black. I try to express it. For this reason, it is not necessary to identify the code width with high accuracy unlike a one-dimensional code, and the code can be accurately recognized by a relatively simple image recognition process. In addition, the validity of the two-dimensional code can be determined by providing the check pattern CP in the data description part DT, thereby reducing the problem of misrecognizing other pseudo image patterns as codes, Recognition efficiency can be further increased.

  Furthermore, the image data of the scale square that defines the scale reference of the two-dimensional code is created, and the template of the cutout symbol parts SS and SE is created and provided for the code recognition process. Therefore, when the code recognition device BS recognizes the two-dimensional code, the scale reference of the two-dimensional code can be grasped in advance from the image data of the scale scale created as described above, and further, the above-mentioned cutout can be performed based on the symbol template The symbol parts SS and SE can be recognized easily and accurately. Therefore, more rapid and accurate code recognition is possible.

  Moreover, as the square image for scale SS, a first square image having a length in the long side direction of the two-dimensional code as one side and a second square image having a length in the short side direction of the two-dimensional code as one side. When the two-dimensional code is recognized from the board image data, the first square image is used. On the other hand, when the two-dimensional code is recognized from the card image data, the second square image is used. Like to use. For this reason, even if the board image data contains a large number of two-dimensional codes in a small size, or the card image data contains only one relatively large size two-dimensional code. Can be recognized efficiently and accurately.

  The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the case where the clipping symbol portions SS and SE are arranged on the left and right of the data description portion DT has been described as an example. However, the clipping symbol portions SS and SE are arranged above and below the data description portion DT. May be. In addition, the shape and specific color of the direction indicating pattern in the cutout symbol portion can be arbitrarily set. Further, the color of each cell in the data description section is not limited to white and black, and other color combinations such as white and blue, white and red, and the like can be used.

  In addition, the number and size of cells constituting the data description part, the configuration of the two-dimensional array, the size and shape of the first and second position detection patterns, the arrangement position with respect to the data description part, the procedure for creating the two-dimensional code The contents, the configuration of the scale square and the symbol template, and the creation method thereof can be variously modified and implemented without departing from the gist of the present invention.

  In short, the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

The schematic block diagram which shows one Embodiment of the meeting assistance system which is one of the uses of the two-dimensional code concerning this invention. The figure which shows the mode of the recording of the meeting information in the system shown in FIG. The figure which shows the structure of the card | curd used with the system shown in FIG. The figure which shows the structure of the two-dimensional code concerning one Embodiment of this invention. The functional block diagram which shows an example of a structure of the apparatus which produces the two-dimensional code shown in FIG. The flowchart which shows the production procedure and the content of the two-dimensional code in the two-dimensional code production apparatus shown in FIG. The flowchart which shows the description procedure and the content of the code data to a data description part. The flowchart which shows the preparation procedure and the content of the symbol template. The flowchart which shows the creation procedure of the square for scale, and its content. The figure which shows an example of the data description part produced by the two-dimensional code production apparatus shown in FIG. The figure which shows an example of the check pattern produced by the two-dimensional code production apparatus shown in FIG. The figure for demonstrating an example of the size adjustment of the symbol part for a cutting performed by the two-dimensional code production apparatus shown in FIG. The figure which shows an example of the two-dimensional code produced by the two-dimensional code production apparatus shown in FIG. The figure which shows an example of the symbol template produced by the two-dimensional code production apparatus shown in FIG. The figure which shows an example of the square for a scale produced with the two-dimensional code production apparatus shown in FIG.

Explanation of symbols

  SV ... Server device, VI ... Board imaging device, CA ... Card imaging device, communication network ... NW, PC1-PCk ... User terminal, 1 ... Board, 21-2i ... Card, 21A ... Opinion entry area, 21B ... Two-dimensional code Entry area, AS ... Two-dimensional code creation device, BS ... Code recognition device, DT ... Data description part, SS, SE ... Symbol part for extraction, 11 ... CPU, 12 ... Bus, 13 ... Program memory, 13a ... Input of creation conditions Control program, 13b ... Symbol size control program, 13c ... Symbol template creation program, 13d ... Two-dimensional code creation program, 13e ... Scale creation program, 13f ... Data output control program, 14 ... Data memory, 14a ... Creation condition storage Area, 14b ... Two-dimensional code storage area 14c ... Symbol template storage area, 14d ... Square storage area for scale, 14e ... Code attribute data storage area, 15 ... Input I / F, 16 ... Output I / F, 17 ... Transmission I / F, 18 ... Input device, 19 ... display, 20 ... printer.

Claims (8)

A code data description part that represents a code by two-dimensionally arranging a plurality of cells and setting these cells to one of the first and second colors;
A two-dimensional code, comprising: a position detection pattern portion that is disposed at both ends of the code data description portion and indicates a position where the code data description portion exists.   The two-dimensional code according to claim 1, wherein the code data description unit includes a check pattern indicating the validity of the two-dimensional code.   The two-dimensional code according to claim 1, wherein the position detection pattern portion has a direction indication pattern that represents a direction in which the code data description portion exists by a shape.   The two-dimensional code according to any one of claims 1 to 3, wherein the position detection pattern portion is set to a third color unique to the position detection pattern portion. A code data description part that represents a code by two-dimensionally arranging a plurality of cells and setting these cells to one of the first and second colors;
A two-dimensional code display medium, which is arranged at both ends of the code data description part and displays a position detection pattern part indicating an existing position of the code data description part.   6. The two-dimensional code display medium according to claim 5, wherein the code data description unit includes a check pattern indicating the validity of the two-dimensional code.   6. The two-dimensional code display medium according to claim 5, wherein the position detection pattern portion has a direction indication pattern that represents the direction in which the code data description portion exists by a shape.   The two-dimensional code display medium according to claim 5, wherein the position detection pattern portion is set to a third color unique to the position detection pattern portion.

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