JP2012181620A - Pos system, pos device, read error detection method of bar code and program thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for, even when two bar codes are overlapped, accurately detecting whether an input bar code is the one which is correctly read.SOLUTION: In a POS system 1 having a scanner 2 for reading a bar code attached to a commodity and a POS terminal 3 for performing registration of a commodity corresponding to the bar code read by the scanner 2 to be acquired, the POS terminal 3 determines whether a bar code input from the scanner 2 is a bar code newly attached to the commodity by referring to a predetermined digit of the bar code data input from the scanner 2. The POS terminal 3 refers to a digit of the bar code in which discount information showing a discount of the commodity is stored and detects a read error of the bar code on the basis of the referred predetermined digit and the discount information.

Description

  The present invention relates to a POS system, a POS device, a barcode misreading detection method, and a program thereof that read barcodes and manage information such as product prices.

  In the distribution retail industry and the like, the management of sales and inventory of products by the POS system is widely performed in general. In the POS system, a barcode attached to a product is read by a scanner, and a product to be sold at a POS register is registered based on the obtained barcode data. The POS system stores information such as prices and sales in various masters in association with information for identifying the products included in the barcode, and uses the information stored in the master to store various information such as sales management. Processing is in progress.

  For example, in a mass-market supermarket or the like, there is a case where discount for a predetermined product is started at a predetermined timing. The bar code includes information indicating whether or not discounting is performed and how the price is discounted. For a product to be discounted, a bar code in which a value indicating the content of the discount is set is newly pasted again. In the POS cash register, if the bar code contains information related to the discount, the price is discounted according to the information and the sales amount is totaled.

  Conventionally, as one of the operation methods when discounting products in the POS system, as shown in FIG. 9A, the barcode of the price after the discount is placed on the barcode of the original price before the discount. A method of attaching the displayed label is known. By pasting the barcode on top, only the barcode with the discounted price is read. The shaded area in the figure indicates that the bar code of the original price before the discount is covered with the bar code label after the discount and is not readable by the scanner. Alternatively, as shown in FIG. 9B, there is also known an operation method in which the original price barcode is filled with magic so that the scanner does not erroneously read the original price barcode. In FIG. 9B, since the bar code label after the discount is pasted to the left, the entire bar code of the original price before the discount is not covered. However, only the barcode of the price after the discount is read by filling the barcode of the original price so as not to operate the function as the barcode.

  The fact that the background of operation as described above gives priority to improving the reading rate by adopting a technology that combines the results of scanning with multiple scanning lines and recognizes it as one barcode There is. If the procedure shown in FIG. 9 is not ensured, a part of the original price barcode and the discounted price barcode are synthesized and recognized as one barcode by the barcode synthesis technology. Thus, misreading is likely to occur.

  In other words, in the distribution and retail industry centering on supermarkets, etc., a wide variety of sales products are handled, so the work time for newly attaching a bar code with a discounted price to the product becomes enormous. It is in an environment where a barcode cannot be attached accurately. As a result, for example, as shown in FIG. 10, a part of the bar code of the discounted price may be pasted and overlapped with the leading area of the bar code of the original price.

  Here, conventionally, generally, information for identifying a product is stored in the first half area (left side) of the barcode, and information related to the discount is stored in the second half area (right side). In this case, if the bar code of the price after the discount is not pasted correctly on the bar code of the original price, as shown in FIG. Sometimes it cannot be read as a single barcode. In this case, the bar code combining technique described above may synthesize the first half of the bar code with the discounted price and the second half of the original price bar code to be recognized as one bar code. The scan code stored in the first half of the barcode is assigned to each product and is a common value before and after the discount, and the information related to the discount stored in the latter half of the barcode of the original price includes: A value indicating the original price is set. For this reason, the POS register cannot correctly discount if a synthesized barcode is input in the case shown in FIG. As described above, it is conceivable that misreading occurs frequently due to the barcode synthesis technique, and the probability of reading at the original price becomes high because it cannot be read at the discount price.

  With regard to barcode reading technology, for example, when abnormal data is included in the data sent from the barcode reader, a technology for determining correct reading data based on the data in the barcode database is provided by the host controller. (For example, Patent Document 1).

  Further, a technique is provided in which bar codes of different systems are created for a price reference product code and a code representing a price reduction price, and bar codes of different systems are provided at positions close to each other. According to this, when an error occurs in the data input of the discount bar code, the input data is discarded even if the product code can be read (for example, cited document 2).

  Furthermore, during the accounting operation, the bar code indicating discount information etc. is scanned together with the product bar code to determine the type of bar code. For bar codes that are not product bar codes, refer to the table for the bar code. A technique for specifying a code type and performing a corresponding process such as discounting is also provided (for example, Patent Document 3).

Japanese Patent Laid-Open No. 2002-024756 JP 2000-163656 A Japanese Patent Application Laid-Open No. 08-212459

  For example, it is conceivable to avoid misreading by assigning different scan codes before and after discounting. However, in order to manage products in the POS system, it is necessary to integrate the code before discounting and the code after discounting. In this case, it is necessary to change the system so that the integration processing is executed in the device on the upper side of the POS register. Since such a system change is a large-scale development, it is desirable that the POS system can determine whether or not the barcode is correctly read in the above-described operation method by pasting.

  An object of the present invention is to provide a technique capable of accurately detecting whether or not an inputted bar code is correctly read.

  According to one aspect of the present invention, a POS system includes a scanner device that reads a barcode attached to a product, and a POS device that registers a product associated with the barcode read and acquired by the scanner device. The POS device refers to a predetermined digit of the barcode data input from the scanner device, so that the barcode input from the scanner device is newly added to the product. A determination unit that determines whether or not the bar code is stored, and a digit in which discount information indicating a discount of a product is stored in the barcode is referred to, and the predetermined digit and the discount referred to in the determination unit are referred to A misreading detection unit that detects misreading of the bar code based on the information is provided.

  According to another aspect of the present invention, a POS device is connected to a scanner device that reads a barcode attached to a product, and registers a product associated with the barcode read and acquired by the scanner device. Whether the barcode input from the scanner device is a barcode newly attached to the product by referring to a predetermined digit of the barcode data input from the scanner device A determination unit that determines a reference, and a digit stored in the bar code indicating discount information of the product in the barcode, and based on the predetermined digit and the discount information referred to in the determination unit, A misreading detection unit that detects misreading of the barcode is provided.

  Furthermore, according to another aspect of the present invention, there is provided a scanner device that reads a barcode attached to a product, and a POS device that registers a product associated with the barcode read and acquired by the scanner device. A barcode misreading detection method in a POS system having a barcode input from the scanner device newly added to the product by referring to a predetermined digit of the barcode data input from the scanner device. It is determined whether or not the barcode is attached, and the stored digit of discount information indicating the discount of the product is referred to in the barcode, and the predetermined digit referred to and the discount information are referred to Based on the above, erroneous reading of the barcode is detected.

  Furthermore, according to another aspect of the present invention, a computer is used to register a product associated with a scanner that reads a barcode attached to a product and a barcode that is read and acquired by the scanner. And a bar code input from the scanner device by referring to a predetermined digit of the bar code data input from the scanner device. It is determined whether or not it is a newly attached barcode, and a reference is made to a digit in which discount information indicating a discount of a product is stored in the barcode. Based on the pull information, the computer is caused to execute processing for detecting misreading of the barcode.

  According to the present invention, it is possible to accurately detect whether or not an inputted barcode is correctly read.

1 is a configuration diagram of a POS system according to an embodiment. It is a figure explaining the example of a format of the new and old barcode. It is the flowchart (the 1) which showed the whole process of the sales management by a POS system. It is the flowchart (the 2) which showed the whole process of the sales management by a POS system. It is a figure which shows the example of a data structure of a goods master and a sales master. It is a figure which shows the example of a screen display of a POS terminal. It is a figure which shows the example of the receipt to output. It is the flowchart (the 1) which showed the analysis process of barcode. It is the flowchart (the 2) which showed the analysis process of barcode. It is a figure explaining the judgment processing of Step S24. It is a figure which shows the example of a screen displayed when an error is detected. It is a figure explaining the operation method in the past. It is a figure explaining generation | occurrence | production of the misreading by the overlapping pasting of the barcode in the past.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a configuration diagram of a POS system according to the present embodiment. A POS system 1 shown in FIG. 1 includes a POS terminal 3, a POS server 4, a scanner 2, and a keyboard 5.

  The POS terminal 3 is, for example, a terminal device having a cash register function, and is placed in a retail store or the like, and registers products to be sold in the store. The POS terminal 3 includes a scanner 2 and a keyboard 5. The scanner 2 optically reads a barcode attached to a product and outputs the read barcode to the POS terminal 3. The keyboard 5 accepts input of various information by a user of the POS terminal 3, for example, a cashier in charge, for example, accepts manual input of a bar code attached to a product.

The POS terminal 3 includes a data check unit 21, an existing processing unit 22, and a transaction log transmission unit 23.
The data check unit 21 determines the validity of the barcode input from the scanner 2 or the keyboard 5. The existing processing unit 22 executes various processes such as a product registration process based on the barcode determined to be appropriate by the data check unit 21. Note that the processing executed in the existing processing unit 22 is the same as the processing in a known POS terminal, and therefore detailed description is omitted here. The transaction log sending unit 23 sends the transaction log created in the existing processing unit 22 toward the POS server 4. The transaction log includes a record of transactions processed at the POS terminal 3.

  The POS server 4 is connected to the POS terminal 3 and includes a transaction log processing unit 41, a sales master 42, and a product master 43. The transaction log processing unit 41 executes processing related to merchandise sales management based on the transaction log received from the POS terminal 3, and stores information related to transactions in the POS terminal 3 in the sales master 42. The product master 43 stores information related to the price of the product. Details of the sales master 42 and the product master 43 will be described with reference to FIG.

  Although only one POS terminal 3 is shown in FIG. 1, a plurality of POS terminals 3 can be connected to the POS server 4. FIG. 1 shows only the configuration related to the barcode check method by the POS system 1 according to the present embodiment, and the description of other configurations is omitted.

  As for the product master 43, FIG. 1 shows a configuration example provided in the POS server 4, but the product master 43 is not limited to this. It is good also as a structure provided with a goods master in the POS terminal 3. FIG.

  According to the POS terminal 3 of the POS system 1 according to the present embodiment, the data check unit 21 determines the validity of the barcode data input from the scanner 2 or the like, and determines that the barcode is misread according to the determination result. Then, the user is prompted to input the barcode again as a reading error. The processing in the existing POS terminal 3 is executed on the barcode whose data is confirmed by the data check unit 21.

  In the embodiment, the validity of data is checked for CODE 128 among various bar codes input to the POS terminal 3. A method for checking barcode data by the data check unit 21 will be specifically described below.

  FIG. 2 is a diagram for explaining a format example of new and old barcodes. Among these, FIG. 2A shows an example of the format of each of the new and old barcodes, and FIG. 2B shows the details of each layout item of the discount barcode.

  The example shown in FIG. 2A is the original price and the bar code after the discount for the same product, that is, the same scan code “2133422804988”. However, in the bar code of discount price (new bar code system), for example, a fixed value “1” is set in the first digit, whereas in the original price bar code (current bar code system), the first digit is set. Set to a value other than “1”. In addition, about the barcode which shows an original price, the general format used conventionally is used.

As shown in FIG. 2B, the new bar code system includes a new bar code flag, a scan code, expiry date information, discount information, and a check digit (C / D).
The new bar code flag indicates that the bar code is a new bar code system, that is, a bar code with a discount price. As described above, a fixed value “1” is set in the embodiment.

  The scan code is information for identifying a product in the POS system 1 and is composed of a 13-digit value. The scan code of a certain product takes a common value regardless of the barcode system.

The expiration date information is information indicating the month, day, and time of the expiration date of the product, and consists of a 6-digit value.
The discount information is information indicating the price after the discount of the product, and consists of a 5-digit value. Specifically, the discount information includes a discount method and a parting price. In the discount method, a value indicating the presence or absence of the discount, and a method indicating what method is used when discounting is stored. In the case of no discount, the value “0” is set as the discount method, and the value “0000” is set as the closing price.

The check digit is used to detect an error in the barcode data and consists of a single digit value.
As shown in FIG. 2 (a), the original price barcode and the discounted barcode are different in system, and the barcode input from the scanner 2 is old or new depending on the value of the first digit. That is, it can be determined whether the original price or the bar code after the discount. The discount information stores a value at a predetermined location for both the old and new barcode systems. For this reason, when two types of old and new barcodes are combined, the new barcode flag stores the value indicating that it is a discounted barcode, but the discount information contains Stores a value indicating "no discount". Thereby, it is detected that the barcode is not read correctly. Only when it is confirmed that the barcode is correctly read, the existing processing in the existing processing unit 22 is executed.

  Next, a method for checking a barcode in the POS system 1 according to the present embodiment will be specifically described by taking as an example the case of registering a product in the POS terminal 3 that functions as a cash register.

3A and 3B are flowcharts showing the overall processing of sales management by the POS system 1.
First, in step S1, it is determined whether or not the barcode is scanned by the scanner 2. If it is determined that there is no scan, the process returns to step S1. If it is determined that there is a scan, the process proceeds to step S2.

  In step S2, the scanner 2 determines the type of scanned barcode. Specifically, it is determined whether or not the barcode is a 26-digit barcode by referring to the number of digits of the barcode. If it is determined that the barcode is a 26-digit barcode, the process proceeds to step S3. In step S3, the scanner 2 and the data check unit 21 of the POS terminal 3 execute barcode analysis processing. When the barcode analysis process is completed, the process proceeds to step S4. If it is determined in step S2 that the barcode is not a 26-digit barcode, no particular process is performed, and the process proceeds to step S4.

  In step S4, the existing processing unit 22 of the POS terminal 3 searches the merchandise master 43 of the POS server 4 that is the host server based on the barcode. In step S5, the existing processing unit 22 holds the information acquired by the search in step S4 in the storage area (not shown in FIG. 1) of the POS terminal 3, and proceeds to step S6.

  FIG. 4A is a diagram illustrating a data structure example of the product master 43. As shown in FIG. 4A, the product master 43 stores the product name and the selling price in association with the scan code. Here, only data related to the explanation of FIG. 3 is shown.

  For example, assume that the POS terminal 3 transmits a 13-digit scan code “12345678890123” to the POS server 4 in step S4. The POS server 4 searches the merchandise master 43 using the received scan code as a key, and transmits the search result to the POS terminal 3. The POS terminal 3 acquires the product name “product A” and the selling price “100 yen” corresponding to the transmitted scan code.

  In step S6, the existing processing unit 22 executes a discount process. Specifically, when the bar code discount information stores a value indicating “discount is present”, the discount is calculated from the selling price held in the storage area and the bar code information included in the bar code. The later price is calculated and stored in the storage area. A known technique is used as a method for calculating the price after the discount. If a value indicating “no discount” is stored in the barcode discount information, the process proceeds to step S7 without performing any particular processing.

  In step S <b> 7, the existing processing unit 22 displays information representing the product for which registration has been accepted in the POS terminal 3 in the product specification area on the screen of the POS terminal 3. In the product detail area, information such as product names and selling prices acquired from the product master 43 is output and displayed. The product name displays information held in the storage area, and the selling price displays the calculated price when discounting is performed in step S6, and displays the price acquired from the POS server 4 when there is no discounting.

  FIG. 5 is a diagram illustrating a screen display example of the POS terminal 3. FIG. 5 shows only items displayed in the product detail area among various items displayed on the screen. For example, if the barcode of the scan code “12345678890123” belongs to the current barcode system and there is no discount, the product name “product A” and its price “¥ 100” are displayed in the product specification area as shown in FIG. Is displayed.

  In step S8, the existing processing unit 22 determines whether or not the product registration process is finished. In the embodiment, the determination as to whether or not the merchandise registration process has ended is based on whether or not the “subtotal” key of the POS terminal 3 has been pressed. If the pressing of the subtotal key is not recognized within a predetermined time, it is determined that the product registration has not been completed yet, and the process returns to step S1. When the subtotal key is pressed and the end of product registration is recognized, the process proceeds to step S9.

  In step S9, the existing processing unit 22 calculates the product information displayed in the product detail area of the screen of FIG. 5, calculates the total amount, and displays it on the screen. In step S <b> 10, the existing processing unit 22 receives an input of a deposit amount from the shopper and recognizes that the “total” key is pressed.

  In step S11, the existing processing unit 22 transmits the transaction log to a printer (not shown in FIG. 1), prints the transaction content on a receipt, and outputs it. FIG. 6 is a diagram illustrating an example of a receipt to be output.

  Finally, in step S <b> 12, the transaction log sending unit 23 of the POS terminal 3 transmits the transaction log to the sales master 42 of the POS server 4. The transaction log processing unit 41 of the POS server 4 processes the received transaction log and registers sales information in the sales master 42.

FIG. 4B is a diagram illustrating a data structure example of the sales master 42. As with the product master 43 in FIG. 4A, only data related to the explanation in FIG. 3 is described here.
As shown in FIG. 4B, the sales master 42 stores the transaction date, scan code, and sales price. If discount processing is performed in step S6, the price after discount is stored in the sales price. The POS server 4 uses the sales master 42 to manage product sales.

  FIG. 7A to FIG. 7C are diagrams for explaining a barcode analysis process. Among these, FIG. 7A and FIG. 7B are flowcharts showing a bar code analysis process. As described above, the barcode analysis processing shown in FIGS. 7A and 7B corresponds to the detailed flow of step S3 in FIG. 3A.

First, in step S21, the scanner 2 determines whether all of the 26-digit barcode data has been read. If it can be read, no processing is performed and the process proceeds to step S26.
If there is data that cannot be read in the 26-digit barcode data, the process proceeds to step S22, and the scanner 2 determines whether 14 or more digits have been read from the left of the barcode data. If the number of digits read is less than 14 digits from the left of the barcode, the process returns to the barcode scanning process in step S1 of FIG. 3A.

  If barcode data of 14 digits or more from the left has been read, the process proceeds to step S23, and the scanner 2 further determines whether or not 14 digits or more have been read from the right of the barcode data. If the number of digits read is less than 14 digits from the right of the barcode, the process returns to the barcode scanning process in step S1 of FIG. 3A.

  If the barcode data of 14 digits or more from the right is read, the process proceeds to step S24, and the scanner 2 correctly synthesizes the barcode data read from the left and the barcode read from the right. Whether or not is possible is determined. If it is determined that the image cannot be correctly combined, the process returns to the barcode scanning process in step S1 of FIG. 3A.

  FIG. 7C is a diagram illustrating the determination process in step S24. As described above, in the embodiment, the 26-digit CODE 128 is the target of the bar code analysis processing of FIGS. 7A and 7B. If 14 digits or more are read from the left side and the right side, since the barcode data has an overlap of 1 digit or more, the composition processing is possible.

  If it is determined in step S24 that the image can be correctly combined, the process proceeds to step S25, and the scanner 2 performs a barcode combining process. As described above, since the bar code combining process is a known technique, a detailed description thereof is omitted here.

In step S26, the scanner 2 notifies the POS terminal 3 of 26-digit barcode data.
In step S27, the data check unit 21 of the POS terminal 3 determines whether or not the first digit of the barcode data is “1”. As described with reference to FIG. 2, when the barcode acquired by the scanner 2 is a new barcode system after discounting, “1” in the first digit is the current barcode system of the original price. In this case, a value other than 1 is set. If the value in the first digit is 1, the data check unit 21 determines that the bar code is a discount bar code and proceeds to step S28. If the value of the first digit is other than 1, the data check unit 21 determines that the barcode is the original price and proceeds to step S29.

  In step S <b> 28, the data check unit 21 refers to the bar code discount information and determines whether the value is other than “0”. As described with reference to FIG. 2, a value other than 0 is set in the discount information if the bar code is a discount price. If the value of the discount information is other than 0, the data check unit 21 determines that the barcode acquired from the scanner 2 has been read correctly, and proceeds to step S31. If the value of the discount information is 0 (the values of all digits are 0), “No discount” is set in the barcode of the new barcode system that is set to “1” in the first digit. Will be. Therefore, in this case, the data check unit 21 determines that the barcode acquired from the scanner 2 has not been correctly read, and proceeds to step S30.

  If a value other than 1 is set in the first digit of the barcode, in step S29, the data check unit 21 refers to the discount information of the barcode and “0” is set in all digits. It is determined whether or not. If the barcode is the original price, “0” is set in all the digits in the discount information. If the value of the discount information is 0, the data check unit 21 determines that the barcode acquired from the scanner 2 has been read correctly, and proceeds to step S31. When the value of the discount information is other than 0, the information indicating the discount is set in the barcode of the current barcode system set to other than “1” in the first digit. Therefore, in this case, the data check unit 21 determines that the barcode acquired from the scanner 2 is not correctly read, and proceeds to step S30.

  In step S30, the data check unit 21 displays on the screen (not shown) that the reading error has been detected in step S28 or step S29, and returns to the barcode scanning process in step S1 in FIG. 3A. FIG. 8 is a diagram illustrating an example of a screen displayed when an error is detected. When the error display shown in FIG. 8 or the like is displayed on the screen, the user of the POS terminal 3 causes the scanner 2 to read the barcode again according to the display message, or manually inputs the barcode via the keyboard 5. Do.

  In step S31, the data check unit 21 acquires a scan code from the bar codes that are determined to have been read correctly in step S28 or step S29, and moves the process to step 4 in FIG. 3A.

  As described above, according to the POS system 1 according to the present embodiment, the data check unit 21 determines the barcode based on a predetermined area of the input barcode data, in the embodiment, the value of the first digit. It is determined whether or not is a barcode newly assigned to the product. Based on the value of the first digit and the discount information included in the barcode, the barcode misreading is detected. Specifically, whether a barcode that is newly attached to a product is set to a value that indicates a discount, or whether a barcode that is originally attached to a product is set to a value that indicates no discount, In other words, barcode misreading is detected based on the consistency between the value indicating whether the barcode is new or old and the value indicating whether there is a discount. If the barcode of the original price and the barcode of the discounted price are partly duplicated and attached to the product, and the two barcodes are combined when scanned by the scanner, It becomes possible to detect. Further, by adopting a configuration in which product registration is performed for a correctly input barcode, it is possible to effectively prevent processing at an incorrect price in the POS system 1.

  Needless to say, the present invention is not limited to the configuration exemplified in the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 POS system 2 Scanner 3 POS terminal 4 POS server 5 Keyboard 21 Data check part 22 Existing processing part 23 Transaction log sending part 41 Transaction log processing part 42 Sales master 43 Goods master

Claims (6)

A POS system having a scanner device that reads a barcode attached to a product, and a POS device that registers a product associated with the barcode read and acquired by the scanner device,
The POS device is
Determining whether or not the barcode input from the scanner device is a barcode newly attached to the product by referring to a predetermined digit of the barcode data input from the scanner device And
Of the bar code, the digit storing the discount information indicating the discount of the product is referred to, and the barcode misread is detected based on the predetermined digit and the discount information referred to in the determination unit. And a misreading detection unit. A POS device that is connected to a scanner device that reads a barcode attached to a product, and that registers the product associated with the barcode read and acquired by the scanner device;
Determining whether or not the barcode input from the scanner device is a barcode newly attached to the product by referring to a predetermined digit of the barcode data input from the scanner device And
Of the bar code, the digit storing the discount information indicating the discount of the product is referred to, and the barcode misread is detected based on the predetermined digit and the discount information referred to in the determination unit. And a misreading detection unit. The misreading detection unit, when a value indicating that there is no discount is set in the discount information of the barcode determined to be a barcode newly attached to the product in the determination unit; and When a value indicating discount is set in the transaction information of the barcode determined to be the barcode originally attached to the product in the determination unit, it is determined that the barcode is misread. The POS device according to claim 2. The misreading detection unit includes a case where a value indicating a discount is set in the discount information of the barcode determined to be the barcode newly attached to the product by the determination unit, and the determination If a value indicating that there is no discount is set in the discount information of the barcode determined to be the barcode originally attached to the product in the section, the barcode is correct The POS device according to claim 2, wherein the POS device is determined to be read. A barcode misreading detection method in a POS system having a scanner device that reads a barcode attached to a product and a POS device that registers a product associated with the barcode read and acquired by the scanner device. And
By referring to a predetermined digit of the barcode data input from the scanner device, it is determined whether the barcode input from the scanner device is a barcode newly attached to the product,
Referencing a digit in which discount information indicating a discount of a product is stored in the barcode, and detecting misreading of the barcode based on the referred to the predetermined digit and the discount information. A method for detecting misreading of bar codes. A program for causing a computer to operate as a POS system having a scanner device for reading a barcode attached to a product and a POS device for registering a product associated with the barcode read and acquired by the scanner device Because
By referring to a predetermined digit of the barcode data input from the scanner device, it is determined whether the barcode input from the scanner device is a barcode newly attached to the product,
A process of detecting misreading of the bar code based on the predetermined digit referred to and the discount information with reference to the digit stored in the bar code indicating discount information of the bar code. A program characterized by being executed by a computer.