JP6557525B2 - Inspection method and inspection system - Google Patents

Description

  The present invention relates to a method and system for reading a barcode symbol collectively and inspecting a product group consisting of a plurality of products each having a barcode symbol attached thereto.

  When inspection is performed using a bar code symbol, the bar code symbol is normally read by reading the bar code symbol one by one using a bar code reader. According to this method, the bar code to be read is read. When there are a large number of code symbols, it takes a long time to read the bar code symbols, and the work efficiency becomes very poor.

Accordingly, in order to increase the efficiency of barcode symbol reading work, several methods for reading a plurality of barcode symbols at once have been proposed in the prior art.
As this type of method, for example, for a plurality of products each having a barcode symbol attached thereto, the barcode symbols are collectively read, and the product is recognized based on the read barcode symbol information (for example, For patent products 1) and products each having two types of barcode symbols attached, the barcode symbols are collectively read for each product, and the product information is updated based on the read barcode symbol information. There is a method (for example, see Patent Document 2).

  However, in these conventional methods, it is only possible to read a plurality of barcode symbols in a batch and for each barcode symbol, and relate the barcode symbol to a product to which the barcode symbol is attached. Cannot read.

  Therefore, according to these conventional methods, for example, as shown in FIG. 2A, a box 2 containing a mobile phone body with a barcode symbol attached thereto, an envelope 3 enclosing a SIM card, and the mobile phone The telephone work schedule 1 is combined into one product package, and a plurality of product packages are combined to form a product package group. The product package group is scanned by reading the barcode symbol collectively for inspection. In the case of carrying out, it is possible to know the number of missing items for each type of the mobile phone main body, the SIM card, and the work process table, but it has not been possible to check which package is missing for which product package.

  In addition, in these conventional methods, it is impossible to collectively read barcode symbols by distinguishing them according to their height positions, that is, to read barcode symbols in a three-dimensional manner.

  Therefore, in these conventional methods, for example, as shown in FIG. 2A, a product package in which an envelope 3 enclosing a SIM card is placed on the upper surface of a box 2 in which a mobile phone body is stored, and FIG. As shown, the envelope 3 in which the SIM card is enclosed can be separated from the product package placed on the upper surface of the work process table 1. As a result, the barcode symbol of the work process table 1 and the SIM card (envelope 3) 2), the barcode symbol reading error of the mobile phone body (box 3) has occurred for the product package as shown in FIG. 2A, or all of the product package as shown in FIG. 2B. It was not possible to distinguish whether the barcode symbol was correctly read.

JP-A-9-114913 Japanese Patent No. 4080789

  Accordingly, an object of the present invention is to provide a method and a system for performing inspection by reading a bar code for a merchandise group in a lump, relating the merchandise to a merchandise and distinguishing height positions.

In order to solve the above-mentioned problem, according to the first invention, for a product group consisting of a plurality of products each having a barcode symbol, the barcode symbol is collectively read and inspected. ) Based on an image obtained by imaging an object, a bar that outputs data of each type, position coordinate, size, number of digits, and width of each bar code included in the object Providing a code reader; and (2) setting reference data relating to barcode symbols included in the standard product group, wherein the reference data is high in the projection onto the plane of the standard product group. Bar code symbol type, position coordinates, size, number of digits, and bar 1 for each bar code symbol group grouped by position and by reference product (3) Data on the width of each bar code symbol bar among the data output from the bar code reader by imaging the product group from above and the bar code reader. And (4) calculating each bar code symbol from the bar code reader based on the height position data of each bar code symbol. (5) converting the position coordinates and size of the code symbol and the data of the width per bar into data based on the height position of the plane obtained by projecting the reference product group; Of the data output from the barcode reader, the data of each barcode symbol type, and each of the above-mentioned values calculated in step (3) A set of data consisting of the data of the height position of the code symbol and the position coordinate and size of each barcode symbol converted in step (4) and the data of the width per bar, and the reference data And a step of inspecting the commodity group by collating.
Here, the term “barcode symbol” refers to all symbols that display coded information printed in a rectangular area, such as QR code symbols (registered trademark) and OCR symbols, in addition to barcode symbols. The term “barcode reader” means a dedicated image reader corresponding to the symbol to be read, and the term “width per bar” refers to the width of the smallest component of the symbol to be read. means. The same applies below.

  In order to solve the above-mentioned problems, and according to the second invention, for a product group consisting of a plurality of products each having a barcode symbol attached thereto, the barcode symbol is collectively read and inspected. (1) Based on an image obtained by capturing an image of an object, data on the type, position coordinate, size, number of digits, and width per bar of each bar code symbol included in the object is output. Preparing a barcode reader to perform, and (2) imaging a reference product group from above by the barcode reader, and setting reference data relating to a barcode symbol included in the reference product group based on the acquired image; , And the reference data is a barcode for each barcode symbol group grouped for each standard product in the acquired image. Includes data on the type, position coordinates, size, number of digits, and width per bar, and (3) images the product group from above with the barcode reader and outputs from the barcode reader There is provided a method comprising the step of inspecting the product group by comparing the obtained data with the reference data.

  Moreover, in order to solve the above-mentioned problem, according to the third invention, for a product group consisting of a plurality of products each having a barcode symbol attached thereto, the system reads the barcode symbol collectively and performs inspection. A frame having a reading station, and attached to the frame and arranged downward above the reading station. When the commodity group is arranged in the reading station, the commodity group is imaged, and based on the obtained image, A barcode reader that outputs data of each type, position coordinate, size, number of digits, and width of each bar included in the product group, and a reference regarding the barcode symbol included in the standard product group A memory unit in which data is stored, wherein the reference data is a level of the standard product group. Data of bar code symbol type, position coordinate, size, number of digits, and width per bar for each bar code symbol grouped by height position and reference product in the projection above And calculating the height position of each barcode symbol using data of the width per bar of each barcode symbol among the data output from the barcode reader; Based on the height position data of each bar code symbol calculated by the calculation unit, the position coordinates and size of each bar code symbol in the data output from the bar code reader and the width per bar A data conversion unit for converting data into data based on the height position of the plane on which the reference product group is projected, and the barcode Among the data output from the decoder, the data of each barcode symbol type, the data of the height position of each barcode symbol calculated by the arithmetic unit, and each bar code converted by the data conversion unit A collation unit that inspects the product group by collating a set of data including the position coordinates and size of the code symbol and the data of the width per bar with the reference data stored in the memory unit The inspection system is characterized by comprising the following.

  Further, in order to solve the above-mentioned problem, according to the fourth invention, for a product group consisting of a plurality of products each having a barcode symbol, the barcode symbol is collectively read and inspected. A frame having a reading station; and a frame attached to the frame and arranged downward above the reading station. When the group of products is arranged at the reading station, the product group is imaged, and the product is based on the acquired image. A barcode reader that outputs data of each type, position coordinate, size, number of digits, and width of each bar included in the group, and a reference regarding the barcode symbol included in the standard product group A memory unit in which data is stored, and the reference data is stored in advance in the barcode code. The reference data is set based on the image of the standard product group acquired by the reader, and the reference data includes the barcode symbol for each barcode symbol group grouped for each standard product in the image of the standard product group. Data of type, position coordinates, size, number of digits, and width per bar is included, and data output from the barcode reader is collated with the reference data stored in the memory unit By doing so, the system characterized by including the collation part which inspects the said goods group is provided.

  According to the first and third inventions, in projecting the reference product group onto the plane, the barcode symbols included in the reference product group are grouped for each height position and for each reference product, and each bar for each group Data of code symbol attributes (type, position coordinate, size, number of digits, width per bar) is set as reference data.

Next, the product group to be inspected is imaged with a barcode reader from above. Thereby, data of each attribute of the barcode symbol included in the product group is output from the barcode reader.
In this case, the bar code symbol to be read by the bar code reader over is in the range of a certain depth of field that contains the focal distance of the bar code reader at the time of imaging, and, in the image obtained by the bar code reader, Based on the size of the barcode symbol near the focal length and the width per bar, the size of the barcode symbol near the focal length and the width per bar are larger than the reference value. The size of the bar code symbol farther than the focal length and the width per bar are smaller than the reference value.

  Based on this fact, the height position of each barcode symbol is calculated using the data of the width per bar of each barcode symbol in the output data of the barcode reader. Furthermore, based on the calculated height position data of each bar code symbol, the position coordinates and size of each bar code symbol in the output data of the bar code reader and the data of the width per bar, respectively, The data is converted into data based on the height position of the plane on which the reference product group is projected.

  The data of the type of each barcode symbol in the output data of the barcode reader, the data of the calculated height position of each barcode symbol, the position coordinates, the size and the bar of each converted barcode symbol A data set composed of data of one width is collated with reference data. Thereby, it is specified to which reference product each barcode symbol read by the barcode reader belongs at which height position of the reference product group.

In this way, it is possible to confirm that there is no missing item in the product group when complete matching with the reference data has been made. Can be identified accurately and easily.
That is, according to the first and third aspects of the invention, it is possible to perform inspection by collectively reading barcode symbol groups three-dimensionally and distinguishing them for each product.

  In the latter, the second and fourth inventions and the first and third inventions are based on the projection of the bar code symbols at the time of setting the reference data based on the projection onto the plane of the standard product group. In the former, the only difference is that the reference product group is captured and acquired from above with a barcode reader and is performed based on the image.

When the reference data is set based on the image of the standard product group acquired by the barcode reader, the height position data of each barcode symbol includes the position coordinates and the size of each barcode symbol in the image. And the width of each bar is reflected in the data, so the bar code symbols need only be grouped for each standard product, and the data output from the bar code reader can be collated directly with the reference data. That's fine.
Needless to say, the same effects as those of the first and third inventions can be obtained in the second and fourth inventions.

It is a flowchart of the inspection method by one Example of this invention. (A) is a perspective view of an example of a mobile phone product package, (B) is a perspective view of another example of a mobile phone product package, and (C) is a product package of (A). It is a top view of an inside work process table. 2A is a plan view of a box containing a mobile phone body in the product package of FIG. 2A, and FIG. 2B is a plan view of containing a SIM card in the product package of FIG. It is a top view of an envelope. 3A shows a projection on a plane on which the work process chart of the product package of FIG. It is a block diagram of the inspection system suitable for implementing the inspection method shown in FIG. It is a flowchart of the inspection method by another Example of this invention. It is a block diagram of the inspection system suitable for implementing the inspection method shown in FIG.

Hereinafter, the configuration of the present invention will be described based on preferred embodiments with reference to the accompanying drawings.
FIG. 1 is a flowchart of an inspection method according to an embodiment of the present invention.
Referring to FIG. 1, according to the present invention, first, based on an image obtained by imaging an object, each type, position coordinate, size, and number of digits of the barcode symbol included in the object. , And a bar code reader that outputs data of the width per bar (step S1 in FIG. 1).

Examples of bar code symbol types include Code 39, Code 128, and NW-7. The position coordinates of the barcode symbol mean the coordinates of the four corners of the barcode symbol or the coordinates of the center of the barcode symbol based on the XY coordinate system preset in the image captured by the barcode reader. The size of the code symbol means the area of the barcode symbol.
Further, the data of the width per bar is normally output as the number of pixels constituting the width per bar.

  According to the present invention, next, reference data relating to barcode symbols included in the standard commodity group is set (step S2 in FIG. 1). The reference data includes the type, position coordinate, size, number of digits of each barcode symbol for each barcode symbol group grouped for each height position and for each standard product in the projection onto the plane of the standard product group. Contains the width data per bar.

Hereinafter, how to set the reference data will be described with a specific example.
Now, consider a mobile phone product package as shown in FIG. 2A as a reference product group. This product package has a work process table 1 in a state in which a box 2 containing a mobile phone body is placed on the work process table 1 and an envelope 3 enclosing a SIM card is placed on the upper surface of the box 2. The entire box 2 and envelope 3 are packed with a transparent shrink film.

2C is a plan view of work process table 1 in the product package of FIG. 2A, FIG. 3A is a plan view of box 2 in the product package of FIG. 2A, and FIG. 3B is in the product package of FIG. It is a top view of envelope 3 of.
As shown in FIG. 2C, two kinds of bar code symbols b1 and b2 are printed on the work process table 1. As shown in FIG. 3A, three kinds of bar code symbols b3 to b5 are displayed on the upper surface of the box 2. As shown in FIG. 3B, the envelope 3 has a window 3a, and two types of barcode symbols b6 and b7 are printed on the surface of the envelope 3, The barcode b8 printed on the SIM card 4 in the envelope 3 can be seen from the window 3a.

As can be seen from FIG. 2A, the barcode symbol groups b1 to b8 included in the product package are grouped into those belonging to the height position h1 in the work process table 1 and those belonging to the height position on the upper surface of the box 2. it can.
Therefore, as shown in FIG. 4, a projection onto a plane on which the work schedule of the product package is located is taken. First, the barcode symbol group (barcode symbols b1 to b8) is converted into a group (bar) at the height position h1. Code symbols b1 and b2) and height position h2 groups (barcode symbols b3 to b8), and further, in each group, barcode symbol groups are grouped for each product.

The result of the above grouping is as follows.
(I) Group at height position h1 Group G1 (work process table 1) → barcode symbols b1, b2
(Ii) Group at height position h2 Group G2 (envelope 3 = SIM card 4) → barcode symbols b6 to b8
Group G3 (box 2 = cell phone body) → barcode symbols b3 to b5

  Further, for each group, the type, position coordinate, size, number of digits, and width per bar of each barcode symbol b1 to b8 are set, thereby completing the setting of the reference data. In this case, as the position coordinates of the barcode symbols b1 to b8, the coordinates of the four corners of each barcode symbol b1 to b8 or each bar based on the XY coordinate system in which one of the four corners of the work process table 1 is set as the origin. The coordinates of the center of the code symbols b1 to b8 are set.

  Referring to FIG. 1 again, according to the present invention, a product group to be inspected is further imaged from above by a bar code reader (step S3 in FIG. 1). As a result, the bar code reader outputs data on the type, position coordinate, size, number of digits, and width per bar of each bar code symbol included in the product group.

  In this case, the barcode symbol read by the barcode reader is within a certain depth of field including the focal length of the barcode reader at the time of imaging, and in the image acquired by the barcode reader, Based on the size of the barcode symbol near the focal length and the width per bar, the size of the barcode symbol near the focal length and the width per bar are larger than the reference value. The size of the bar code symbol farther than the focal length and the width per bar are smaller than the reference value.

  Based on this fact, the height position of each bar code symbol is calculated using the data of the width per bar of each bar code symbol in the output data of the bar code reader (step S4 in FIG. 1).

  Further, based on the data of the height position of each barcode symbol calculated in step S4, the position coordinates and size of each barcode symbol in the output data of the barcode reader and the data of the width per bar are respectively obtained. Then, it is converted into data based on the height position of the plane on which the reference product group is projected (step S5 in FIG. 1).

  The barcode symbol type data in the output data of the barcode reader, the height position data of each barcode symbol calculated in step S4, the position coordinates of each barcode symbol converted in step S5, and Inspection is performed by comparing a set of data consisting of data of size and width per bar with reference data (step S6 in FIG. 1).

  That is, it is specified to which reference product each barcode symbol read by the barcode reader belongs at which height position of the reference product group. When complete matching with the reference data can be performed, it can be confirmed that there is no missing item in the product group. Missing products can be identified accurately and easily.

Thereby, for example, it is possible to inspect a product package group composed of a plurality of combinations of product packages as shown in FIG. 2A to identify which package is missing for which product package. Inspection is performed on a product package group consisting of an arbitrary combination of a product package as shown in FIG. 2A and a product package as shown in FIG. 2B, whether a barcode symbol reading error of the mobile phone body (box 3) has occurred for the product package as shown in FIG. 2A, or all the barcode symbols for the product package as shown in FIG. It is possible to accurately distinguish whether the reading has been performed correctly.
Thus, according to the inspection method of the present invention, it is possible to perform inspection by collectively reading barcode symbol groups in a three-dimensional manner and distinguishing them for each product.

FIG. 5 is a block diagram of an inspection system suitable for carrying out the inspection method shown in FIG.
Referring to FIG. 5, the inspection system includes a frame 5 having a reading station, and a barcode reader 6 attached to the frame 5 and arranged downwardly above the reading station.

  The bar code reader 6 images the product group 7 when the product group 7 (in FIG. 5, composed of four products 7a to 7d accommodated in the cardboard box 12) is arranged at the reading station. Based on the obtained image, data of each type, position coordinate, size, number of digits, and width per bar of the barcode symbols b9 to b13 included in the product group 7 is output.

The inspection system also includes a memory unit 11 in which reference data related to barcode symbols included in the standard product group is stored.
In this case, the reference data includes, for each barcode symbol group grouped for each height position and for each standard product in the projection onto the plane of the standard product group, the type, position coordinate, size, Includes data on the number of digits and the width per bar.

  The inspection system further includes a calculation unit 8 that calculates the height position of each barcode symbol using the data of the width of each barcode symbol in the output data of the barcode reader 6 per bar. Based on the data on the height position of each barcode symbol calculated by the unit 8, the position coordinate and size of each barcode symbol in the output data of the barcode reader 6 and the data on the width per bar are respectively obtained. A conversion unit 9 is provided for converting the height position of the plane on which the reference product group is projected into data based on the reference.

  The inspection system further converts the data of each barcode symbol type in the output data of the barcode reader 6, the height position data of each barcode symbol calculated by the calculation unit 8, and the conversion unit 9. In addition, collation for inspecting a product group is performed by collating a set of data including the position coordinates and size of each barcode symbol and the data of the width per bar with reference data stored in the memory unit 11. Part 10 is provided.

  Each time a product group is arranged at the reading station, the product group is picked up by the barcode reader 6 and collated by the collation unit 10 and inspected. In this case, the product group is manually changed each time. The inspection may be carried out by placing it on the reading station at work, or a belt conveyor is arranged and a reading station is provided on the conveyor surface of the belt conveyor, and the group of products is read while being sequentially conveyed by the belt conveyor. Each time it reaches the station, the bar code reader 6 may take an image of the product group and inspect it.

FIG. 6 is a flowchart of an inspection method according to another embodiment of the present invention.
In the latter case, the embodiment shown in FIG. 6 and the embodiment shown in FIG. 1 perform the grouping of barcode symbols when setting the reference data based on the projection onto the plane of the standard product group. The former is different from the former in that the reference product group is actually acquired by picking up an image with a barcode reader from above and performed based on the image.
Therefore, in the following, detailed description of the same configuration as that of the embodiment shown in FIG. 1 is omitted.

  Referring to FIG. 6, according to the present invention, first, a bar code reader similar to that in the embodiment of FIG. 1 is prepared (step S1 in FIG. 6).

Next, the standard product group is imaged from above with a barcode reader, and reference data relating to barcode symbols included in the standard product group is set based on the acquired image (step S2 in FIG. 6).
The reference data includes data of each barcode symbol type, position coordinate, size, number of digits, and width per bar for each barcode symbol group grouped for each standard product in the acquired image. Yes.

  Thus, when setting the reference data based on the image of the standard product group acquired by the barcode reader, the height position data of each barcode symbol is the position coordinate of each barcode symbol in the image. Since it is reflected in the data of size and width per bar, the bar code symbol grouping need only be performed for each reference product.

Then, the product group to be inspected is imaged from above by the barcode reader, and the product group is inspected by collating the data output from the barcode reader with the reference data (step S3 in FIG. 6).
Thus, according to this embodiment, inspection can be performed by collating the output data of the barcode reader directly with the reference data.
Needless to say, this embodiment can provide the same effects as those of the embodiment of FIG.

FIG. 7 is a block diagram of an inspection system suitable for carrying out the inspection method shown in FIG. In FIG. 7, the same components as those in the embodiment shown in FIG. 5 are denoted by the same reference numerals, and detailed description thereof will be omitted below.
Referring to FIG. 7, the inspection system includes a frame 5 having a reading station, and a barcode reader 6 attached to the frame 5 and arranged downwardly above the reading station.

The inspection system also includes a memory unit 14 in which reference data related to barcode symbols included in the standard product group is stored.
The reference data is set based on the image of the standard product group acquired in advance by the barcode reader 6, and the reference data includes each bar code symbol group grouped for each standard product in the image of the standard product group. Data on the type of bar code symbol, position coordinates, size, number of digits, and width per bar are included.

  The inspection system further includes a collation unit 13 that inspects the product group 7 by collating the data output from the barcode reader 6 with the reference data stored in the memory unit 14.

  In the above-described embodiment, the configuration in which the inspection is performed by reading the barcode symbol by the barcode reader is illustrated, but in the present invention, in addition to the barcode symbol, such as a QR code symbol or an OCR symbol, All symbols that display the coded information that are printed in the rectangular area can be used. In this case, a dedicated image reader corresponding to the symbol to be read is used instead of the barcode reader. In that case, the term “width per bar” in the above embodiment means the width of the smallest component of the symbol to be read.

DESCRIPTION OF SYMBOLS 1 Work process table 2 Box in which mobile phone main body is stored 3 Envelope 3a in which SIM card is enclosed Window 4 SIM card 5 Frame 6 Bar code reader 7 Product group 7a to 7d Product group 8 Calculation unit 9 Conversion unit 10 Verification unit 11 Memory Part 12 Cardboard box 13 Collation part 14 Memory part b1-b13 Barcode symbol G1, G2, G3 Group h1, h2 height position for every reference product

Claims (4)

For a product group consisting of a plurality of products each having a barcode symbol attached thereto, the barcode symbol is collectively read and inspected.
(1) Based on an image obtained by capturing an image of an object, data on the type, position coordinate, size, number of digits, and width per bar of each bar code symbol included in the object is output. Preparing a barcode reader to
(2) setting reference data related to barcode symbols included in the standard product group, and the reference data is provided for each height position and for each standard product in the projection onto the plane of the standard product group. For each group of barcode symbols, including data on the type, position coordinate, size, number of digits, and width per bar for each barcode symbol,
(3) The bar code reader is used to image the product group from above, and each bar code symbol is used by using the data of the width per bar of each bar code symbol among the data output from the bar code reader. Calculating a height position of
(4) Based on the data of the height position of each barcode symbol, the position coordinate and size of each barcode symbol and the data of the width per bar among the data output from the barcode reader, Converting each of the reference product groups into data based on the height position of the plane obtained by projecting the reference product group;
(5) The data of the type of each barcode symbol among the data output from the barcode reader, the data of the height position of each barcode symbol calculated in step (3), and in step (4) A step of inspecting the product group by comparing a set of data including the position coordinates and size of each converted barcode symbol and the data of the width per bar with the reference data. A method characterized by that. For a product group consisting of a plurality of products each having a barcode symbol attached thereto, the barcode symbol is collectively read and inspected.
(1) Based on an image obtained by capturing an image of an object, data on the type, position coordinate, size, number of digits, and width per bar of each bar code symbol included in the object is output. Preparing a barcode reader to
(2) imaging a standard product group from above with the barcode reader, and setting reference data regarding barcode symbols included in the standard product group based on the acquired image, and the reference data includes: For each barcode symbol group grouped for each reference product in the acquired image, each barcode symbol type, data of position coordinates, size, number of digits, and width per bar,
(3) It has a step of inspecting the product group by imaging the product group from above with the barcode reader and collating data output from the barcode reader with the reference data. A method characterized by. For a product group consisting of a plurality of products each having a barcode symbol, the barcode symbol is collectively read and inspected.
A frame having a reading station;
A barcode that is attached to the frame and disposed downward above the reading station, images the commodity group when the commodity group is disposed at the reading station, and based on the obtained image, the barcode included in the commodity group A barcode reader that outputs data of each symbol type, position coordinates, size, number of digits, and width per bar;
A memory unit that stores reference data related to barcode symbols included in the standard product group, and the reference data is grouped for each height position and for each standard product in the projection onto the plane of the standard product group. Each bar code symbol group includes data of each bar code symbol type, position coordinates, size, number of digits, and width per bar;
A calculation unit that calculates the height position of each barcode symbol using data of the width per bar of each barcode symbol among the data output from the barcode reader;
Based on the height position data of each barcode symbol calculated by the calculation unit, the position coordinates and size of each barcode symbol and the width per bar of the data output from the barcode reader A data conversion unit that converts the data into data based on the height position of the plane on which the reference product group is projected,
Of the data output from the barcode reader, the data of the type of each barcode symbol, the data of the height position of each barcode symbol calculated by the calculation unit, and the data converted by the data conversion unit The product group is inspected by collating a set of data including the position coordinates and size of each barcode symbol and the data of the width per bar with the reference data stored in the memory unit. And a verification unit for performing the system. For a product group consisting of a plurality of products each having a barcode symbol, the barcode symbol is collectively read and inspected.
A frame having a reading station;
A barcode that is attached to the frame and arranged downward above the reading station, images the product group when the product group is arranged at the reading station, and is included in the product group based on the acquired image A barcode reader that outputs data of each symbol type, position coordinates, size, number of digits, and width per bar;
A memory unit that stores reference data related to barcode symbols included in the standard product group, and the reference data is set based on an image of the standard product group acquired in advance by the barcode reader, and the reference The data includes, for each barcode symbol group grouped for each reference product in the image of the reference product group, each barcode symbol type, position coordinate, size, number of digits, and width per bar. Data is included, and
A system comprising: a collation unit that inspects the product group by collating data output from the barcode reader with the reference data stored in the memory unit.