JP4206078B2 - Two-dimensional code creation device and its program - Google Patents

Description

  The present invention relates to an apparatus for creating a two-dimensional code used for identifying a card on which an opinion is described and a program therefor, for example, in a system that supports a meeting or workshop that employs the opinion aggregation method.

  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 bar code or a two-dimensional code such as a QR code having information in the horizontal and vertical directions is used (for example, see Non-Patent Document 1).

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

  However, when recording the process of collecting opinions, the video camera captures an area of the desk or the entire wall on which cards are distributed. For this reason, the code printed on the card cannot be correctly recognized from the captured image data depending on the given reading conditions such as the size, position, inclination, etc. of the card, and as a result, the movement history of the card can be accurately recorded. It may disappear.

The present invention has been made paying attention to the above circumstances, and the object of the present invention is to reduce the influence of the size, position, and inclination of the medium , and enable simple, quick and accurate recognition. It is an object of the present invention to provide a two-dimensional code creation apparatus and program suitable for creating a dimensional code, and particularly for use in the recording process of an opinion gathering process.

  In order to achieve the above object, the two-dimensional code creating apparatus and the program according to the present invention fetch a two-dimensional code creation condition from the outside, and arrange a plurality of cells two-dimensionally based on the fetched creation condition. A two-dimensional code comprising a code data description part that expresses a code by setting these cells to one of the first and second colors, and a position detection pattern part that indicates the position of the code data description part And the generated two-dimensional code is output to the outside.

  Therefore, according to the present invention, by providing a creation condition, a code data description part in which a plurality of cells are two-dimensionally arranged according to the condition, and a position detection pattern part indicating the position of the code data description part are provided. A two-dimensional code is created. Therefore, when the display medium is imaged and the two-dimensional code is recognized from the image data by image processing, for example, even if the size of the display medium is small or the display medium is tilted, the position detection pattern unit is used. The code data description part can be found efficiently from the image data with high probability.

  In addition, the found code data description part two-dimensionally arranges a plurality of cells whose sizes and numbers are defined according to specified conditions, and uses these cells to set the bit value of the code data to white or black. It is to express in. For this reason, it is not necessary to identify the code width with high accuracy unlike a one-dimensional barcode, and the code can be accurately recognized by a relatively simple image recognition process.

Further, the present invention provides means for creating scale square information for defining a scale reference of the two-dimensional code, which is used when recognizing the two-dimensional code, and a position detection pattern portion included in the two-dimensional code. It is further characterized by further comprising means for creating template information of the position detection pattern portion used for recognition.
Therefore, when recognizing the two-dimensional code, the scale reference of the two-dimensional code can be grasped in advance from the created scale square information, and the position detection pattern section is further based on the template information of the position detection pattern section. Can be recognized easily and accurately. Therefore, more rapid and accurate code recognition is possible.

Further, the present invention is characterized by comprising the following specific configuration or processing steps.
In the first configuration and processing step, the length of one side of the cell, the information indicating the arrangement configuration of the cell, the information indicating the configuration of the position detection pattern unit, and the code data are taken in as a two-dimensional code creation condition. . Then, when creating the two-dimensional code, a data description part is created based on the length of one side of the captured cell and the information representing the cell arrangement, and a predetermined code data description part is created. A check pattern indicating that the code data description part is a component of a two-dimensional code is described in the cell, and the cell excluding the check pattern of the code data description part corresponds to the captured code data. The monochrome pattern to be written is described. Then, a position detection pattern portion is created based on the captured information indicating the configuration of the position detection pattern portion, and the created position detection pattern portion is connected to both ends of the created code data description portion. It is arranged in the part.

  Therefore, the configuration and size of the data description part are specified based on the information indicating the length of one side of the cell and the arrangement configuration of the cells given as the two-dimensional code creation conditions, and the code data is described in this data description part Is done. Further, a position detection pattern portion is created based on information representing the configuration of the position detection pattern portion, and is arranged at both ends of the code data description portion. For this reason, a two-dimensional code of a desired size can be created easily and accurately under relatively few conditions. Further, by providing a check pattern in the data description part, it is possible to determine the validity of the two-dimensional code, thereby further improving the recognition efficiency.

In the second configuration and processing step, when creating the square information for scale, the first image data composed of a square having a length in the short side direction of the created two-dimensional code as one side is created. Creating second image data consisting of a square with the length in the long side direction of the created two-dimensional code as one side, and outputting the created first and second image data as scale square information It is.
Therefore, it becomes possible to create the square information for scale by a relatively simple process of creating image data composed of squares.

In the third configuration and processing step, when the template information of the position detection pattern portion is created, information representing the shape of the position detection pattern portion is extracted from the fetched creation conditions, and the created two-dimensional code The size of the position detection pattern part is calculated based on the length of the short side direction of the image, and the distance between the position detection pattern parts is calculated based on the length of the created two-dimensional code in the long side direction. To do. Then, the shape of the extracted position detection pattern portion, the calculated size of the position detection pattern portion, and the calculated distance between the position detection pattern portions are used as template information of the position detection pattern portion. Is output.
Therefore, template information can be created relatively easily according to the shape of the position detection pattern portion and the lengths in the long side direction and the short side direction of the created two-dimensional code.

In short, according to the present invention, a code data description section expressing a code by two-dimensionally arranging a plurality of cells and setting these cells to one of the first and second colors based on a given creation condition And a two-dimensional code including position detection pattern portions arranged at both ends of the code data description portion, and outputting the created two-dimensional code to the outside, and further recognizing the two-dimensional code The position detection is used when creating the square information for the scale that defines the scale reference of the two-dimensional code, and the position detection pattern part included in the two-dimensional code. The template information for the pattern part is created .

Therefore, according to the present invention, it is possible to create a two-dimensional code that enables simple, quick and accurate code recognition by reducing the influence of the size, position, and inclination of the medium. It is possible to provide a two-dimensional code creating apparatus and its program suitable for use in the recording process.

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 creating apparatus 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 configured by, for example, the Internet or a LAN (Local Area Network).

  The server device SV has a function as a conference information management device. The server device SV has a function of taking in video data captured by the board imaging device VI via a cable and image data captured by the card imaging device CA. And a function of capturing 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 gathering 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 a digital still camera, for example, 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.

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 composed of, for example, a square. 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 the two-dimensional code, and indicate the direction in which the data description part DT exists as shown in FIG. A direction indicating pattern is formed. In this direction indicating pattern, the pattern shape is set to a combination of “reverse U type” and “U type”. The pattern shapes of the cutout symbol portions SS and SE are not limited to “reverse U type” and “U type”, but a combination of “<type” and “> type” or “→”. 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 “←”.

By the way, 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 3 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. The creation conditions to be input include the length [pixels] of one side of the cell, information representing the arrangement of the cells, image data representing the shape of the cutout symbol portions SS and SE, and numeric data representing the card ID. . 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 shapes 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 of the cutout symbol portions SS and SE, the length [pixels] of the sides of the cutout symbol portions SS and SE, and the distance [pixels] between the cutout symbol portions SS and SE. Is represented by

  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. 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) cells in the data description part DT are set in the 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 receives input of bitmapped image data of the cutout symbol portions SS and SE. Subsequently, in step 6i, the CPU 11 executes the symbol size control program 13b to adjust the size of the input cutout symbol portions 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.
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 shapes 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 image data representing the shape of the read cutout symbol parts SS and SE and the calculated size of the cutout symbol parts SSb and SEb [ pixels] and the calculated distance [pixels] between the cutout symbol portions SSb and SEb are transferred from the transmission I / F 17 to the code recognition device BS as information representing the symbol portion 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, square image data having one side with the read length in the short side direction and square image data having one side with the length in the long side direction are created. 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.

In step 9d, the CPU 11 executes the data output control program 13e to display the created square image data on the display 19 via the output I / F 16 and to supply the printer 20 for printing. .
As described above, in this embodiment, the two-dimensional code creation conditions include the length [pixels] of one side of the cell, the information indicating the cell arrangement, and the image data indicating the shapes of the cutout symbol portions SS and SE. Then, numeric data representing the card ID is taken in from the outside. Then, a data description portion DT in which a plurality of cells are two-dimensionally arranged is created based on the fetched creation conditions, and white or black corresponding to each bit value of the card ID is written in each cell. Further, the cutout symbol parts SS and SE are created, and after size adjustment, they are arranged at both ends of the data description part DT.

  Therefore, a two-dimensional code in which the cutout symbol parts SS and SE are arranged at both ends of the data description part DT composed of a plurality of two-dimensionally arranged cell groups is automatically created simply by giving a creation condition. By using this two-dimensional code for card identification, the data description part DT can be identified with a high probability by the cutout symbol parts SS and SE, regardless of whether the card size is small or the card is tilted. This makes it possible to identify the card efficiently and accurately.

  In particular, the pattern shape of the cutout symbol parts SS and SE is set to a combination of “reverse U type” and “U type” to indicate the direction in which the data description part DT exists as shown in FIG. ing. For this reason, 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, thereby further improving the recognition efficiency.

  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 barcode, 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. 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 the 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 creation procedure of the two-dimensional code and its 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 production apparatus 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 one Embodiment of the two-dimensional code produced by the two-dimensional code production apparatus concerning this invention. The functional block diagram which shows one Embodiment of the two-dimensional code production apparatus concerning this invention. The flowchart which shows the production procedure and the content of the two-dimensional code by 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 a structure 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 two-dimensional code creation device used in a system for recognizing the two-dimensional code by imaging a medium on which a two-dimensional code is displayed by an imaging device, performing image processing on the image data of the captured medium ,
Means for taking in the creation conditions of the two-dimensional code from the outside;
A code data description part that expresses a code by two-dimensionally arranging a plurality of cells and setting these cells to one of the first and second colors, and position detection indicating the location of the code data description part Means for creating a two-dimensional code comprising a pattern portion for use based on the taken creation conditions;
Means for outputting the created two-dimensional code to the outside;
Means for creating the square information for scale defining the scale reference of the two-dimensional code used when recognizing the two-dimensional code;
A two-dimensional code creation device comprising: means for creating template information of the position detection pattern portion used when recognizing the position detection pattern portion included in the two-dimensional code. The means for fetching the two-dimensional code creation condition from the outside includes the length of one side of the cell, the information indicating the arrangement configuration of the cell, the information indicating the configuration of the position detection pattern portion, and the code data. Import as dimension code creation conditions,
The means for creating the two-dimensional code is:
Means for creating the data description section based on the length of one side of the captured cell and information representing the arrangement configuration of the cell;
Means for writing a check pattern indicating that the code data description part is a component of a two-dimensional code in a predetermined cell of the generated code data description part;
Means for writing a black and white pattern corresponding to the captured code data in a cell excluding the check pattern of the code data description unit;
Means for creating a position detection pattern portion based on the information representing the configuration of the captured position detection pattern portion;
2. The two-dimensional code creating apparatus according to claim 1, further comprising means for arranging the created position detection pattern portions at both ends of the created code data description portion. Means for creating the scale square information,
Means for creating first image data composed of a square having a length in the short side direction of the created two-dimensional code as one side;
Means for creating second image data consisting of a square with one side being the length in the long side direction of the created two-dimensional code;
2. The two-dimensional code creation device according to claim 1, further comprising means for outputting the created first and second image data as scale square information. Means for creating the template information of the position detection pattern portion,
Means for extracting information representing the shape of the position detection pattern portion from the captured creation conditions;
Means for calculating the size of the position detection pattern portion based on the length in the short side direction of the created two-dimensional code;
Means for calculating a distance between the position detection pattern portions based on the length in the long side direction of the created two-dimensional code;
The shape of the extracted position detection pattern portion, the calculated size of the position detection pattern portion, and the calculated distance between the position detection pattern portions are used as template information of the position detection pattern portion. The two-dimensional code creation device according to claim 1, further comprising an output unit. A computer, an input interface, and an output interface used in a system for recognizing the two-dimensional code by picking up an image of a medium on which the two-dimensional code is displayed with an image pickup device and performing image processing on the image data of the picked-up medium A program used in a two-dimensional code creation device comprising:
A process of fetching the creation conditions of the two-dimensional code from the outside via the input interface;
A code data description part that expresses a code by two-dimensionally arranging a plurality of cells and setting these cells to one of the first and second colors, and position detection indicating the location of the code data description part A process of creating a two-dimensional code comprising a pattern portion for use based on the taken creation conditions;
A process of outputting the created two-dimensional code to the outside via the output interface;
A process of creating scale square information that defines a scale reference of the two-dimensional code used when recognizing the two-dimensional code;
A program for causing the computer to execute processing for creating template information of a position detection pattern portion used when recognizing a position detection pattern portion included in the two-dimensional code. The process of fetching the creation conditions of the two-dimensional code from outside includes the length of one side of the cell, the information indicating the arrangement configuration of the cells, the information indicating the configuration of the position detection pattern unit, and the code data. Import as dimension code creation conditions,
The process of creating the two-dimensional code is as follows:
A process of creating the data description section based on the length of one side of the captured cell and information representing the arrangement configuration of the cell;
A process of setting a check pattern indicating that the code data description part is a component of a two-dimensional code in a predetermined cell of the created code data description part;
A process of setting a black and white pattern corresponding to the captured code data in a cell excluding the check pattern of the code data description unit;
Based on the information representing the configuration of the captured position detection pattern portion, processing for creating a position detection pattern portion;
6. The program according to claim 5, wherein the computer is caused to execute processing for arranging the created position detection pattern portion at both ends of the created code data description portion. The process of creating the scale square information is as follows:
A process of creating first image data consisting of a square having one side of the length in the short side direction of the created two-dimensional code;
A process of creating second image data consisting of a square with one side being the length in the long side direction of the created two-dimensional code;
6. The program according to claim 5, which causes the computer to execute a process of outputting the created first and second image data as scale square information to the outside via the output interface. The process of creating the template information of the position detection pattern portion is as follows:
A process of extracting information representing the shape of the position detection pattern portion from the captured creation conditions;
Based on the length in the short side direction of the created two-dimensional code, a process for calculating the size of the position detection pattern portion;
Based on the length in the long side direction of the created two-dimensional code, a process for calculating the distance between the position detection pattern portions;
The shape of the extracted position detection pattern portion, the calculated size of the position detection pattern portion, and the calculated distance between the position detection pattern portions are used as template information of the position detection pattern portion. 6. The program according to claim 5, which causes the computer to execute processing to output from the output interface to the outside.

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