JP2018195074A - Code reading method - Google Patents

Abstract

To correctly recognize a machine reading code displayed on a glossy material.SOLUTION: In recognizing a dot code 21 displayed on a glossy material, a scanner 2 reads the dot code 21 with a transparent film 3 interposed between the dot code 21 and the scanner 2. The transparent film 3 interposed between the dot code 21 and the scanner 2 suppresses the scanner 2 from receiving light components which adversely affect the recognition of the dot code 21.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a code reading method for recognizing a machine reading code by a reader.

  Conventionally, a barcode is used as one means for identifying a product. When managing products using barcodes, a uniform barcode for each product is printed on the product or its package, and the barcode is associated with product information so that when the barcode is read, the product Can be identified. In recent years, dot codes consisting of dot patterns have been used. Also in the case of a dot code, a product can be identified by printing on the product or its package, as with a barcode.

  The above-mentioned machine reading codes such as bar codes and dot codes are generally configured by printing bars, dots, etc. in black on a white area, and irradiating reading light such as infrared rays to detect the reflected light. Can be recognized. Therefore, when the reading sensitivity is low, the machine reading code cannot be correctly recognized. In view of this, Japanese Patent Application Laid-Open No. 2004-151867 discloses a technique that allows a machine-readable code to be correctly recognized by adjusting the reflectance of the machine-readable code and the reflectance of the underlying portion (for example, patents). Reference 1).

JP 10-187905 A

  By the way, in the machine reading code as described above, it is printed on various products and packages, but displayed on a glossy material such as paper whose surface is coated or pearl printed. There is also. In that case, when the reading light is irradiated to recognize the machine reading code, the irradiated reading light is irregularly reflected on the glossy material, and the reflected light reflected by the machine reading code cannot be detected correctly. There is a problem that the machine-readable code cannot be recognized.

  The present invention has been made in view of the problems of the conventional techniques as described above, and provides a code reading method capable of correctly recognizing a machine reading code displayed on a glossy material. Objective.

In order to achieve the above object, the present invention provides:
A code reading method for recognizing a machine reading code displayed on a glossy material by a reader,
Irradiating reading light from the reader to the machine reading code;
Receiving the reflected light of the reading light reflected by the machine reading code with the reader with a transparent film interposed between the machine reading code and the reader;
And recognizing the machine reading code using the reflected light.

  In the present invention configured as described above, the reflected light of the reading light reflected by the machine reading code is received by the reader through a transparent film interposed between the machine reading code and the reader. However, at that time, although the reading light is irregularly reflected on the glossy material on which the machine reading code is displayed, the reader receives the light component that adversely affects the recognition of the machine reading code by the reader. This is suppressed by the transparent film, so that the machine-reading code can be correctly recognized in the reader using the received reflected light.

  Moreover, as such a transparent film, it is preferable that the thickness is 0.1 mm-1.0 mm.

  According to the present invention, although the reading light emitted from the reader is diffusely reflected on the glossy material on which the machine reading code is displayed, the light component that adversely affects the recognition of the machine reading code by the reader is read by the reader. The light received by the machine is suppressed by the transparent film interposed between the machine reading code and the reader, so that the reflected light received by the reader is displayed on the glossy material. The reading code can be recognized correctly.

It is a figure which shows 1st Embodiment of the identification body of this invention, (a) is an external appearance perspective view, (b) is a figure which shows the detailed structure of the dot code display area shown to (a). It is a figure for demonstrating the code reading method which recognizes the dot code displayed on the package 1 shown in FIG. 1, (a) is an external appearance perspective view in the state which recognizes a dot code, (b) is a reading surface. It is the figure seen from the side direction. FIG. 3 is a block diagram illustrating a configuration of the scanner illustrated in FIG. 2. 4 is a flowchart for explaining a method of recognizing a dot code displayed on the package shown in FIG. 1 by a scanner having the configuration shown in FIG. 3. It is a figure for demonstrating an effect | action at the time of irradiating reading light to a dot code from the scanner shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  1A and 1B are diagrams showing an embodiment of an identifier on which a machine reading code recognized by the code reading method of the present invention is displayed. FIG. 1A is an external perspective view, and FIG. It is a figure which shows the detailed structure of the shown dot code display area.

  As shown in FIG. 1, the identification body in this embodiment is a package 1 configured by providing a dot code display area 20 on one side of a box formed by folding a paper base material 10.

  The paper substrate 10 is made of a glossy material by performing coating processing or pearl printing processing on the entire surface thereof, and pattern printing 11 is applied on the entire surface excluding the dot code display area 20. In the dot code display area 20, a dot code 21 serving as a machine reading code is displayed. The dot code 21 expresses information by a set of dots shifted from the reference position up, down, left, and right from the intersection of the vertical and horizontal lines of the lattice, and is given to the product accommodated in the package 1. The product ID is expressed. As the dot code 21, for example, it is possible to use a known code manufactured by Gridmark.

  Hereinafter, a method of recognizing the dot code 21 displayed on the package 1 configured as described above will be described.

  FIG. 2 is a diagram for explaining a code reading method for recognizing the dot code 21 displayed on the package 1 shown in FIG. 1, and (a) is an external perspective view in a state where the dot code 21 is recognized. b) is a diagram viewed from the side of the reading surface.

  When the dot code 21 displayed on the package 1 shown in FIG. 1 is recognized, a transparent film 3 such as PET is interposed between the scanner 2 serving as a reader and the dot code 21 as shown in FIG. . And the dot code 21 is recognized by irradiating the reading light which consists of infrared rays from the scanner 2, and receiving the reflected light. As the transparent film 3, for example, a clear file for office use can be considered. Therefore, the transparent film 3 is not limited to a film having a light transmittance of 100%, and may be any film having sufficient transparency to transmit the reading light, and its thickness is 0.1 mm to 1.0 mm. It is preferable that

  FIG. 3 is a block diagram showing the configuration of the scanner 2 shown in FIG.

  As the scanner 2 shown in FIG. 2, for example, GS-1520 manufactured by Gridmark Co. can be used, but not limited thereto, as shown in FIG. 3, an irradiation unit 31, a light receiving unit 32, and a calculation unit 33. Other products having the power supply unit 34, the memory 35, and the control unit 36 can be used.

  The irradiation unit 31 irradiates reading light composed of infrared rays for reading and recognizing a dot code.

  The light receiving unit 32 receives reflected light of reading light emitted from the irradiation unit 31.

  The computing unit 33 recognizes the dot code using the reflected light received by the light receiving unit 32.

  The power supply unit 34 is constituted by a storage battery or the like, and operates the scanner 2.

  In addition to the operation program for the scanner 2, the memory 35 can also store a dot code recognized by the calculation unit 33.

  The control unit 36 controls operations of the irradiation unit 31, the light receiving unit 32, and the calculation unit 33.

  FIG. 4 is a flowchart for explaining a method of recognizing the dot code 21 displayed on the package 1 shown in FIG. 1 by the scanner 2 having the configuration shown in FIG. FIG. 5 is a diagram for explaining an operation when the dot code 21 is irradiated with reading light from the scanner 2 shown in FIG. In FIG. 5, there are gaps between the scanner 2, the transparent film 3, and the paper base material 10 for easy understanding. However, in actuality, these are in contact with each other. Yes.

  When the dot code 21 displayed on the package 1 shown in FIG. 1 is recognized by the scanner 2 having the configuration shown in FIG. 3, first, between the scanner 2 and the dot code 21 as shown in FIG. With the transparent film 3 interposed, reading light is irradiated from the irradiation unit 31 of the scanner 2 in this state (step 1).

  The reading light emitted from the irradiation unit 31 is reflected by the dot code display area 20, and the reflected light is received by the light receiving unit 32 of the scanner 2 (step 2). At this time, when the dot code 21 is displayed using carbon-filled ink that is an infrared absorbing material, the reading light emitted from the irradiation unit 31 is absorbed by the dot and received by the light receiving unit 32. In the captured image using the reflected light, only the dot portion is photographed in black. When the dot code 21 is displayed using ink made of an infrared reflective material, the reading light emitted from the irradiation unit 31 is reflected by the dots, and the reflected light received by the light receiving unit 32 is reflected. A pattern corresponding to the dot code 21 is provided.

  By the way, in the package 1 shown in FIG. 1, since the paper substrate 10 forms a glossy material by performing coating processing and pearl printing processing on the entire surface, as shown in FIG. When the reading light 4 is irradiated from the irradiation unit 31 of 2, the reading light 4 is irregularly reflected on the surface of the paper substrate 10, and in addition to the reflected light 5 a reflected in the direction in which the reading light 4 has traveled, When reflected light 5b is reflected in a different direction, and the reflected light 5b is received by the scanner 2, dot scanner recognition in the scanner 2 is adversely affected.

  However, since the transparent film 3 is interposed between the scanner 2 and the dot code 21, the light receiving unit 32 receives reflected light 5 b that is a light component that adversely affects the recognition of the dot code by the scanner 2. This is suppressed by the transparent film 3, whereby only the reflected light 5 a is received by the light receiving unit 32 of the scanner 2.

  Then, the calculation unit 33 of the scanner 2 recognizes the dot code 21 displayed on the paper base 10 using the reflected light 5a received by the light receiving unit 32 (step 3).

  As described above, in this embodiment, the reading light emitted from the scanner 2 is irregularly reflected on the paper material 10 on which the dot code 21 is displayed, but the light component that adversely affects the recognition of the dot code 21 by the scanner 2. Received by the scanner 2 is suppressed by the transparent film 3 interposed between the dot code 21 and the scanner 2, whereby the reflected light 5 a received by the scanner 2 causes the paper base material to be received. The dot code 21 displayed on 10 can be correctly recognized.

  In this embodiment, with the transparent film 3 interposed between the scanner 2 and the dot code 21, the dot code 21 is irradiated with reading light from the irradiation unit 31 of the scanner 2 and reflected by the dot code 21. Although the reflected light is received by the light receiving unit 32, the transparent film 3 is interposed between the scanner 2 and the dot code 21 when the reflected light reflected by the dot code 21 is received by the light receiving unit 32. Just do it. However, since the time from irradiation of the reading light to reception of the reflected light in the scanner 2 is extremely short, the reading in the scanner 2 is actually performed with the transparent film 3 interposed between the scanner 2 and the dot code 21. Light irradiation and reception of the reflected light are performed.

  Further, in this embodiment, the dot code 21 is described as an example of the machine reading code. However, as the machine reading code, a bar code, a two-dimensional code, or the like can be considered. However, bar codes and two-dimensional codes are less susceptible to irregular reflection of reading light even when displayed on a glossy material, as compared to dot codes.

DESCRIPTION OF SYMBOLS 1 Package 2 Scanner 3 Transparent film 4 Reading light 5a, 5b Reflected light 10 Paper base material 11 Pattern printing 20 Dot code display area 21 Dot code 31 Irradiation part 32 Light reception part 33 Calculation part 34 Power supply part 35 Memory 36 Control part

Claims (2)

A code reading method for recognizing a machine reading code displayed on a glossy material by a reader,
Irradiating reading light from the reader to the machine reading code;
Receiving the reflected light of the reading light reflected by the machine reading code with the reader with a transparent film interposed between the machine reading code and the reader;
Recognizing the machine-reading code using the reflected light. The code reading method according to claim 1,
The code reading method, wherein the transparent film has a thickness of 0.1 mm to 1.0 mm.

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