JP2021000751A - Information recording product, medium and booklet - Google Patents

Abstract

To provide an information recording product, a medium and a booklet which are difficult to falsify and have high stability of reading.SOLUTION: There is provided an information recording product 30 comprising a synthetic image including a base image, a first image formed on the base image and a second image formed on the first image. The base image is an image having from 50% to 70% of a dot area ratio formed of a bright material, the first image is formed of the bright material and the second image is formed of a transparent material. The first and second images are different pattern images formed by a specific rule and are configured to have different reflection light quantities depending on observation angle. The synthetic image is configured so that at least one image of the first and second images can be recognized depending on the observation angle.SELECTED DRAWING: Figure 1

Description

The present invention relates to an information recorder, a medium and a booklet.

Conventionally, there is a digital watermarking technique for embedding specific information in an image or the like. If this technique is used in printed matter, information can be embedded at a level that cannot be visually recognized by humans, and the artistic effect of printed matter is not impaired. In addition, the information embedded in the printed matter can be read by a reading device.

When this embedded information is used for authenticity determination, for example, it is desirable that the embedded information is difficult to estimate from the duplicate. Therefore, a technique relating to an information recorder devised so that the embedded information is difficult to estimate is disclosed (for example, Patent Document 1).

JP-A-2016-93895

The one described in Patent Document 1 has a problem that the reading of the transparent layer is not stable when there is a blank area in the bright layer. On the contrary, if the blank area is eliminated and the entire surface of the bright layer is completely covered with ink as in solid printing, the reading of the transparent layer is stable, but the information of the transparent layer is easy to find and is easily forged. turn into.

An object of the present invention is to provide an information recording body, a medium, and a booklet which are hard to be forged and have high reading stability.

The present invention solves the above-mentioned problems by the following solutions.
The first invention is an information recorder including a base image, a first image formed on the base image, and a composite image including a second image formed on the first image. The base image is an image having a net point area ratio of 50% or more and 70% or less formed of a brilliant material, the first image is formed of a brilliant material, and the second image is transparent. The first image and the second image formed of a material are different pattern images generated according to a specific rule, and are configured so that the amount of reflected light differs depending on the observation angle. The composite image is the observation angle. It is an information recorder capable of recognizing at least one of the first image and the second image.
The second invention is the information recorder of the first invention, in which the second image is formed in the base image region in which the base image is formed.
A third invention is an information recorder according to the first invention or the second invention, wherein the base image and the first image are formed of the glittering material having a different color. Is.
A fourth invention is an information recorder in which the base image is an irregular halftone dot image in any of the information recorders from the first invention to the third invention.
The fifth invention is the information recorder of the fourth invention, in which the base image is an image obtained by FM screening.
The sixth invention is a medium including any of the information recorders from the first invention to the fifth invention.
The seventh invention is a booklet including any information recording body from the first invention to the fifth invention.

According to the present invention, it is possible to provide an information recording body, a medium and a booklet which are hard to be forged and have high reading stability.

It is a figure for demonstrating the printed matter which concerns on this embodiment. It is a figure which shows the example of the base image of the brilliant base layer which concerns on this embodiment. It is a figure which shows the example of the 1st image of the brilliant information layer which concerns on this embodiment. It is a figure which shows the example of the 2nd image of the transparent layer which concerns on this embodiment. It is a figure for demonstrating the observation mode based on the structure of the information recording body which concerns on this embodiment. It is a figure which shows the reading result with the change of the halftone dot area ratio in the bright base layer of the information recorder which concerns on this embodiment. It is a figure for demonstrating the positional relationship between an illumination light source and a camera at the time of copying a card which concerns on this embodiment. It is a functional block diagram of the reader which concerns on this embodiment. It is a flowchart which shows the code identification process in the reading apparatus which concerns on this embodiment.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. It should be noted that this is only an example, and the technical scope of the present invention is not limited to this.

(Embodiment)
FIG. 1 is a diagram for explaining the printed matter 10 according to the present embodiment.
<Printed matter 10>
The printed matter 10 (medium) shown in FIG. 1 (A) is, for example, a ticket such as an admission ticket. FIG. 1A shows a plan view of the printed matter 10 viewed from the upper side to the lower side in the vertical direction Z. The printed matter 10 has, for example, monetary value in itself, but the copy product which is a copy of the printed matter 10 has no monetary value. The printed matter 10 includes a base 11 and an information recording body 30.
The base 11 is a base material on which the printed matter 10 is based, and is formed of, for example, white paper. The base 11 is not limited to white paper, as long as it has a flat surface capable of carrying a printed image, and may be other paper such as high-quality paper, coated paper, tack paper, plastic card, or film. The printed image on the printed matter 10 relates to the contents of the ticket in this example.

<Structure of information recorder 30>
The information recorder 30 is provided on the surface side of the base 11, that is, on the upper side in the Z direction. The information recorder 30 is printed with information used for authenticity determination, such as a code, by latent image printing. The image printed on the information recording body 30 is changed by changing the observation direction of the base 11.
FIG. 1B is a partial schematic view of a cross section in the GG direction in FIG. 1A. FIG. 1B shows a cross-sectional view of the printed matter 10 as viewed from the front in the Y direction. As shown in FIG. 1B, the information recording body 30 includes a bright base layer 31, a bright information layer 32, and a transparent layer 33 on the base 11.

The brilliant base layer 31 is a layer on which a base image, which is an irregular pattern image (halftone dot image), is printed by an ink containing a brilliant material.
The brilliant information layer 32 is a layer on which a first image, which is a pattern image, is printed by an ink containing a brilliant material. Here, the first image formed by the brilliant information layer 32 is, for example, a code that can be read by a reading device 5 described later.
The transparent layer 33 is a layer on which a second image, which is a pattern image different from the pattern image of the bright information layer 32, is printed by the ink of the transparent material. Here, the second image formed by the transparent layer 33 is, for example, a code that can be read by the reading device 5 described later.
In this example, the bright base layer 31, the bright information layer 32, and the transparent layer 33 are all square, and the transparent layer 33 is formed on the entire bright base layer 31.

Here, a method of manufacturing the information recording body 30 will be briefly described.
First, a base 11 on which the contents of the ticket have been printed is prepared in advance, and the base image is gravure-printed on the base 11 as a bright base layer 31 with a glossy ink containing a bright material.
Next, the first image is overlaid on the image of the brilliant base layer 31 with a glossy ink containing a brilliant material as the brilliant information layer 32 and gravure printed.
As the ink for drawing the base image and the first image, for example, various types of inks are assumed as illustrated below.
For example, it may be a silver ink containing aluminum powder, copper powder, zinc powder, tin powder, iron phosphide or the like as a component. Further, the ink may be a mixture of a silver ink and a chromatic ink of a colored dye containing a pigment or a dye.

Further, the ink for drawing the brilliant base layer 31 and the brilliant information layer 32 may be an ink containing only a brilliant material showing a bluish gold color or a reddish gold color. Further, the ink of a brilliant material showing bluish gold or reddish gold may be mixed with the chromatic ink of the above-mentioned colored dye.
Furthermore, it may be pearl ink, liquid crystal ink, OVI (Optical Variable Ink), CSI (Color Shifting Ink), or the like, which is an ink containing a functional pigment whose color changes by reflecting light. The pearl ink is an ink containing a pearl pigment which has pearl luster as compared with ordinary pigments and has safety, luster, and a sense of quality. The liquid crystal ink is an ink containing a liquid crystal having a characteristic that the color changes with temperature.

The ink for drawing the brilliant base layer 31 and the brilliant information layer 32 may be the same color ink and may be made of different materials, or may be made of the same material or different color inks of different materials. ..

Next, on the first image of the brilliant information layer 32, the second image is superimposed as the transparent layer 33 with transparent ink or the like and gravure printed. The ink for drawing the second image is, for example, an achromatic ink such as a matte OP varnish, a transparent varnish, an ink varnish, a transparent ink, or a medium ink. These inks may be any printing ink such as ultraviolet curable ink, oxidative polymerization type ink, penetrating type ink, overheat drying type ink, and evaporation drying type ink.

Here, the thickness of the ink applied as the bright base layer 31, the bright information layer 32, and the transparent layer 33 is, for example, about 1 micrometer. The thickness of the ink is not limited to this. Further, for example, the thickness of the ink may be changed depending on the material.
The above-mentioned printing step is not limited to gravure printing, and may be wet offset printing, dry offset printing, letterpress printing, waterless flat plate printing, flexo printing, screen printing, concave printing and the like.

Next, in the printing area of a certain area printed in the printing process of the information recorder 30, the printing condition in which the area where the background can be concealed is expressed in% is defined as the area ratio, and especially when the background can be concealed by halftone dots As the point area ratio, printing of the bright base layer 31, the bright information layer 32, and the transparent layer 33 will be described.
FIG. 2 is a diagram showing an example of a base image of the bright base layer 31 according to the present embodiment.
FIG. 3 is a diagram showing an example of a first image of the brilliant information layer 32 according to the present embodiment.
FIG. 4 is a diagram showing an example of a second image of the transparent layer 33 according to the present embodiment.

FIG. 2 shows an image B including an image B1 and an image B2 that can be applied as a base image of the bright base layer 31.
Image B is, in this example, an irregular pattern image called an FM screen. Image B shows an irregular pattern image from image B0 having a halftone dot area ratio of 0% to image B3 having a halftone dot area ratio of 100%. Among the images B, those suitable as the base image are from the image B1 having a halftone dot area ratio of 50% to the image B2 having a halftone dot area ratio of 70%.
The bright base layer 31 is used to stabilize the reading of the transparent layer 33. Therefore, it is desirable to use images from image B1 having a halftone dot area ratio of 50% to image B2 having a halftone dot area ratio of 70%. The suitable halftone dot area ratio of image B will be described later.

FIG. 3 shows an enlarged image C1 (first image) of the bright information layer 32 and a region E1 which is a part thereof. The brilliant information layer 32 is a layer on which the image C1 is printed. As shown in the area E1, the image C1 represents a pattern image as a binary value by the print area C1a and the non-print area C1b.
The print area C1a is printed with, for example, a halftone dot area ratio of 100%.
The non-printing area C1b is a non-printing area.

FIG. 4 shows an enlarged image C2 (second image) of the transparent layer and a region E2 which is a part thereof. The transparent layer 33 is a layer on which the image C2 is printed. As shown in the area E2, the image C2 is a binary pattern image represented by the print area C2a and the non-print area C2b.
The code system is different between the pattern image shown by the print area C2a of the image C2 and the pattern image shown by the print area C1a of the image C1 described above.

Next, the image C2 of the transparent layer 33 shown in FIG. 4 will be described.
Image C2 is an image generated by a particular rule. The image C2 can represent characteristic points and lines in the spatial frequency domain whose frequency has been converted by performing a Fourier transform, for example. By performing the conversion process on the image C2, the data after the conversion process can represent, for example, characteristic points.
Here, the specific rule is not limited to the Fourier transform, and may be another transform process. For example, it may be a conversion process for a barcode, a conversion process for a two-dimensional code such as a QR code (registered trademark), or the like.

The image C1 of the brilliant information layer 32 shown in FIG. 3 is also the same as the image C2 of the transparent layer 33, and by performing the conversion process on the image C1, the data after the conversion process is, for example, characteristic. Can represent points. However, the image C1 of the brilliant information layer 32 and the image C2 of the transparent layer 33 are different pattern images generated by a specific rule.
Further, since the image C1 of the brilliant information layer 32 and the image C2 of the transparent layer 33 of the information recording body 30 are pattern images, they are meaningless images at first glance by a person.

As a method for manufacturing the information recording body 30, for example, the bright base layer 31 is pre-printed on the base 11 by, for example, offset printing.
Next, the bright information layer 32 and the transparent layer 33 are printed according to the customer's request.
Here, as described above, the base image to be printed on the brilliant base layer 31 is an irregular pattern image due to halftone dots such as an FM screen, so that fine printing by offset printing or gravure printing is possible. It is desirable to do it.
On the other hand, the first image printed on the brilliant information layer 32 may be a coarser image than an irregular pattern image due to halftone dots such as an FM screen. Therefore, the first image to be printed on the brilliant information layer 32 is not limited to offset printing and gravure printing, and may be printed by various manufacturing methods such as a toner printer and foil transfer.

Next, regarding the above-mentioned information recording body 30, the relationship between the angle of the viewpoint to be observed (observation angle) and the visible image will be described.
FIG. 5 is a diagram for explaining an observation mode based on the structure of the information recording body 30 according to the present embodiment.
FIG. 6 is a diagram showing a reading result 40 accompanying a change in the halftone dot area ratio in the bright base layer 31 of the information recording body 30 according to the present embodiment.

FIG. 5 illustrates the three positional relationships between the illumination light source 21, the viewpoint 22, and the information recorder 30 in the diffuse reflection region and the regular reflection (specular reflection) region. When the viewpoint 22 (22a) is at the position P1 with respect to the positions of the illumination light source 21 and the information recording body 30, it means that the observation is made in the diffuse reflection region. Further, when the viewpoint 22 (22b) is located at the position P2 with respect to the positions of the illumination light source 21 and the information recording body 30, the observation is made in the specular reflection region.
In the following, the images C1 and C2 shown in FIGS. 3 and 4 will be described as an example.

When the information recorder 30 is composed of only the bright information layer 32, the amount of reflected light greatly differs in the diffuse reflection region due to the difference in density between the print region C1a and the non-print region C1b of the image C1 in FIG. The print area C1a and the non-print area C1b can be distinguished, and the pattern image in the print area C1a can be recognized. On the other hand, in the specular reflection region, since the amount of reflected light is large in both the print region C1a and the non-print region C1b, the difference cannot be detected, and the print region C1a and the non-print region C1b cannot be distinguished. That is, in the specular reflection region, the pattern image in the print region C1a cannot be recognized.
As described above, by using the ink of the brilliant material, the brilliant information layer 32 can be made to appear in various ways, such as the pattern image in the print area C1a may or may not be visible depending on the observation angle.

Next, when the information recording body 30 is composed of only the transparent layer 33, the image C2 of FIG. 4 is transparent and cannot be distinguished in the diffuse reflection region. On the other hand, in the specular reflection region, the amount of reflected light changes depending on the difference in density between the print region C2a and the non-print region C2b, so that the print region C2a and the non-print region C2b can be distinguished.
As described above, the transparent layer 33 uses a material (ink or the like) whose reflected light amount differs depending on the observation angle, so that the pattern image which is the image C2 of the transparent layer 33 may or may not be visible depending on the observation angle. You can show it.

Next, when the information recording body 30 has the brilliant information layer 32 and the transparent layer 33 formed on the brilliant base layer 31, the pattern image which is the print region C1a can be distinguished in the diffuse reflection region. Since the print area C2a and the non-print area C2b cannot be distinguished from each other, a pattern image in the print area C1a is observed as a whole.
Further, in the specular reflection region, the print area C1a and the non-print area C1b cannot be distinguished, and the print area C2a and the non-print area C2b can be distinguished.
Therefore, the information recorder 30 can be made to appear in various ways depending on the observation angle, such as the image of the bright information layer 32 and the transparent layer 33 being visible or invisible.

However, since the brilliant base layer 31 is at the base of the brilliant information layer 32, the base image forming the brilliant base layer 31 overlaps the non-printing region C1b. Further, when the halftone dot area ratio of the bright base layer 31 is low, many blank areas are generated, so that the reading of the transparent layer 33 is not stable. Therefore, for reading the bright information layer 32 and the transparent layer 33, it is necessary to consider the halftone dot area ratio of the base image of the bright base layer 31.

FIG. 6 shows the reading result 40 of the image C1 and the image C2 when the halftone dot area ratio of the bright base layer 31 is changed. The reading result of the image C1 is shown in the code reading result of the bright information layer 32 of the reading result 40. The "◯" in the code reading result of the bright information layer 32 of the reading result indicates that the code could be read, and the "x" indicates that the code could not be read. According to the reading result 40, if the halftone dot area ratio of the base image of the bright base layer 31 is 70% or less, the pattern image in the print area C1a is observed, and the image C1 can be read. On the other hand, when the halftone dot area ratio of the base image of the bright base layer 31 is 80%, the base image of the bright base layer 31 hinders the reading of the pattern image in the print area C1a.

Further, the reading result of the image C2 is shown in the code reading result of the transparent layer 33 of the reading result 40. The "⊚" and "○" in the code reading result of the transparent layer 33 of the reading result indicate that the code could be read, and the "x" indicates that the code could not be read. According to the reading result 40, if the halftone dot area ratio of the base image of the bright base layer 31 is 50% or more, the pattern image in the print area C2a is observed, and the image C2 can be read. On the other hand, when the halftone dot area ratio of the base image of the bright base layer 31 is 40% or 30%, the reading is not stable because the base image of the bright base layer 31 itself has many blank areas. When the halftone dot area ratio of the base image of the bright base layer 31 is 50% (indicated by "○" in the figure), the halftone dot area ratio is 60% or more ("◎" in the figure). It was necessary to adjust the reading angle more strictly than (indicated by). That is, a halftone dot area ratio of 60% or more is easy to read even if the reading angle is not adjusted more strictly, and is excellent in reading stability.
According to the reading result 40, if the halftone dot area ratio of the base image of the bright base layer 31 is the condition 41 from 50% or more to 70% or less, the images C1 and C2 can be viewed at their respective readable observation angles. I was able to read from. Further, the halftone dot area ratio of the base image of the bright base layer 31 was from 60% or more to 70% or less, which was a more preferable range.

<Reproduction of printed matter 10>
Next, the case where the printed matter 10 is duplicated will be described.
FIG. 7 is a diagram for explaining the positional relationship between the illumination light source 21 and the camera 23 at the time of copying the printed matter 10 according to the present embodiment.
7 (A) and 7 (B) show the positional relationship between the illumination light source 21 of a duplicator such as a copier, the camera 23, and the printed matter 10. An image of the information recorder 30 of the printed matter 10 is acquired by the camera 23 in a state where the light is emitted from the illumination light source 21 shown in FIG. 7A or FIG. 7B.

FIG. 7A shows a case where the illumination light source 21 and the camera 23 are located in the direction perpendicular to the information recorder 30 and the camera 23 acquires an image. Further, FIG. 7B shows a case where the illumination light source 21 irradiates the information recording body 30 from a slightly oblique direction, and the camera 23 takes a picture from a direction perpendicular to the information recording body 30 to acquire an image. .. In any case, the camera 23 captures all the images of the bright base layer 31, the bright information layer 32, and the transparent layer 33 of the information recording body 30 depending on the positional relationship between the illumination light source 21 and the information recording body 30. ..
In this way, based on the image obtained by the camera 23, the copying machine produces a copy product of the printed matter 10.

Then, the copy product has a printed matter (not shown) at a position corresponding to the information recording body 30 (see FIG. 1A) of the printed matter 10. The printed body has a composite image of the base image of the bright base layer 31 of the information recording body 30, the first image of the bright information layer 32, and the second image of the transparent layer 33. Therefore, the printed matter can see only the composite image regardless of the observation angle from any region (diffuse reflection region, specular reflection region, etc.). Therefore, for example, the printed matter cannot observe only the second image of the transparent layer 33, and cannot observe only the first image of the bright information layer 32.

Further, when the printed matter 10 is printed in monochrome, the printed matter has a layer made of a general black ink containing carbon. On the other hand, when the printed matter 10 is color-printed, the printed matter has a layer made of general CMYK ink.
On the other hand, as described above, the brilliant base layer 31 and the brilliant information layer 32 of the information recording body 30 of the printed matter 10 are produced by using metallic ink.
Therefore, in the duplicating machine, it becomes difficult to adjust the color represented by the metallic ink, and the printed matter of the copy product has a different color from the information recording body 30 of the real printed matter 10. In addition, it is difficult to copy transparent ink with a duplicator. Therefore, it can be seen at a glance that the copy product is a fake due to the difference in color.

<Reading device 5>
Next, a reading device 5 (external device) that reads a code from the information recording body 30 of the printed matter 10 will be described.
FIG. 8 is a functional block diagram of the reading device 5 according to the present embodiment.
The reading device 5 is, for example, a mobile terminal represented by a smartphone.
The reading device 5 includes a control unit 50, a storage unit 60, a reading unit 65, a touch panel display 67, and a communication interface unit 69.
The control unit 50 is a CPU (central processing unit) that controls the entire reading device 5. The control unit 50 appropriately reads and executes the OS (operating system) and application programs stored in the storage unit 60, thereby collaborating with the above-mentioned hardware to execute various functions.
The control unit 50 includes an image reception unit 51, a conversion unit 53, and a code identification unit 55.

The image receiving unit 51 receives the image data of the information recording body 30 via the reading unit 65 by reading the information recording body 30 by the reading unit 65.
The conversion unit 53 uses the conversion application 61b described later to perform predetermined conversion on the image data received by the image reception unit 51, and acquires data for code generation.
The code specifying unit 55 refers to the code table 63 and identifies the code from the data acquired by the conversion unit 53.

The storage unit 60 is a storage area for a hard disk, a semiconductor memory element, or the like for storing programs, data, and the like necessary for the control unit 50 to execute various processes.
The computer is an information processing device including a control unit, a storage device, and the like, and the reading device 5 is an information processing device including a control unit 50, a storage unit 60, and the like, and is included in the concept of a computer.

The storage unit 60 stores the program storage unit 61 and the code table 63.
The program storage unit 61 is a storage area for storing various programs. The program storage unit 61 stores the control program 61a and the conversion application 61b. The control program 61a is a program for executing each function of the control unit 50. The conversion application 61b is a dedicated application for reading a code called from the control program 61a. The control program 61a and the conversion application 61b are downloaded from, for example, an application distribution server (not shown) via the communication interface unit 69 and stored in the program storage unit 61.
The code table 63 is a table in which codes are stored. In the code table 63, for example, the data corresponding to the second image of the transparent layer 33 and the code corresponding to the data are stored in advance.

The reading unit 65 is, for example, a camera, which is a device that acquires printed contents such as images and characters as images. The information recording body 30 of the printed matter 10 is read by the reading unit 65 of the reading device 5.
The touch panel display 67 has a function as a display unit composed of a liquid crystal panel or the like and a function as an input unit for detecting a touch input by a user's finger or the like.
The communication interface unit 69 is, for example, an interface for communicating with the above-mentioned distribution server or the like.

<Processing of reader 5>
Next, the processing of the reading device 5 will be described.
FIG. 9 is a flowchart showing a code specifying process in the reading device 5 according to the present embodiment.
In step S (hereinafter, simply referred to as “S”) 10 of FIG. 9, the control unit 50 of the reading device 5 activates the reading unit 65.
In S11, the control unit 50 (image receiving unit 51) reads the image held in the information recording body 30 via the reading unit 65.

Here, the user can read the second image from an angle at which the reading unit 65 can read the second image included in the transparent layer 33 of the information recording body 30. In addition, the user can read the first image from an angle at which the reading unit 65 can read the first image included in the bright information layer 32 of the information recording body 30. Further, the user can read the first image and the second image from an angle at which the reading unit 65 can read both the first image included in the bright information layer 32 of the information recording body 30 and the second image included in the transparent layer 33. Can be read.
When specifying the code, the user reads the image from the angle at which the second image of the transparent layer 33 can be read, for example, to identify the specular reflection region visible to the transparent layer 33 and read the image. Perform the operation of.

In S12, the control unit 50 (conversion unit 53) performs conversion processing on the read image and acquires data for code generation. The conversion process is executed by the conversion application 61b.
When the image received by the image receiving unit 51 is read, the read image is subjected to conversion processing to acquire data for code generation.

In S13, the control unit 50 (code specifying unit 55) refers to the code table 63 and determines whether or not the code corresponding to the acquired data can be specified. If there is something in the code table 63 that matches the acquired data, the code can be specified. When the code can be specified (S13: YES), the control unit 50 shifts the process to S14. On the other hand, when the code cannot be specified (S13: NO), the control unit 50 shifts the process to S14a.
In S14, the control unit 50 causes the touch panel display 67 to indicate that the code has been identified. After that, the control unit 50 ends this process. After completing this process, the control unit 50 performs a process based on the specified code.
On the other hand, in S14a, the control unit 50 causes the touch panel display 67 to indicate that an error has occurred. After that, the control unit 50 ends this process.

When the user uses the reading device 5 to read the image from the reading unit 65 from an angle at which only the second image of the transparent layer 33 can be read, the control unit 50 obtains only the second image of the transparent layer 33. .. Then, the control unit 50 executes the conversion application 61b and acquires data for identifying the code (S12 in FIG. 9). Here, since the code corresponding to the second image of the transparent layer 33 is stored in the code table 63, the control unit 50 can specify the code (S13: YES in FIG. 9).

On the other hand, when the user reads the image from the angle at which the second image of the transparent layer 33 and the first image of the brilliant information layer 32 can be read by using the reading device 5, the control unit 65 reads the image. 50 does not obtain only the second image of the transparent layer 33. Then, even when the reading unit 65 reads the image from an angle at which the base image of the brilliant base layer 31 and the first image of the brilliant information layer 32 can be read, the control unit 50 reads only the second image of the transparent layer 33. There is nothing to get. In such a case, the pattern image which is the first image of the brilliant information layer 32 has a different code system from the pattern image which is the second image of the transparent layer 33. Therefore, when the conversion application 61b is executed (S12 in FIG. 9), the control unit 50 cannot acquire data for specifying the code corresponding only to the pattern image which is the second image of the transparent layer 33. Therefore, the code for the acquired data is not stored in the code table 63, and the control unit 50 cannot specify the code (S13: NO in FIG. 9).

As described above, according to the present embodiment, there are the following effects.
(1) The information recording body 30 includes a bright base layer 31 having a base image having a halftone dot area ratio of 50% or more and 70% or less below the bright information layer 32 and the transparent layer 33. Then, the transparent layer 33 is formed in the region of the bright base layer 31. Since the bright base layer 31 gives a glossy feeling to the transparent layer 33, the reading by the reading device 5 can be stabilized.

(2) By forming the brilliant base layer 31 and the brilliant information layer 32 with brilliant materials of different colors, for example, it is possible to make it more difficult to adjust the color with a copier. Therefore, the information recorder 30 can be made more difficult to forge.
(3) By making the image of the brilliant base layer 31 an irregular halftone dot image, it is possible to make it difficult to generate moire, which is a striped pattern generated by the interference between the halftone dots.
Further, by making the image obtained by FM screening as the irregular halftone dots of the bright base layer 31, it is possible to make it difficult to forge and improve the security.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. Moreover, the effects described in the embodiments are merely a list of the most preferable effects arising from the present invention, and the effects according to the present invention are not limited to those described in the embodiments. The above-described embodiment and the modified form described later can be used in combination as appropriate, but detailed description thereof will be omitted.

(Transformed form)
(1) In the present embodiment, the structure of one layer as the transparent layer 33 has been described as an example, but the present invention is not limited to this. For example, the transparent layer may also be provided with a base layer, and may have a two-layer structure with a layer having a halftone dot area ratio of 100%. By doing so, the composition of the transparent layer becomes more complicated, and it can be made more difficult to deceive.

(2) In the present embodiment, the base image of the bright base layer 31 has been described by taking an FM screening image as an example, but the present invention is not limited thereto. It may be another irregular halftone dot image.

(3) In the present embodiment, the brilliant base layer 31, the brilliant information layer 32, and the transparent layer 33 have been described as having a square shape, but the present invention is not limited thereto. The brilliant base layer 31, the brilliant information layer 32, and the transparent layer 33 may have other shapes such as a rectangular shape, a circular shape, and an elliptical shape.

(4) In the present embodiment, the case where the transparent layer 33 is directly formed on the bright information layer 32 has been described as an example, but the present invention is not limited to this. For example, a base material such as a transparent film may be provided between the bright information layer 32 and the transparent layer 33. Further, for example, the transparent layer 33 is formed on the bright information layer 32 described in the present embodiment, and the transparent layer 33 has a base material such as a transparent film. May be good.

(5) In the present embodiment, the printed matter 10 having the information recording body 30 has been described by taking a ticket as an example, but the present invention is not limited thereto. For example, it may be an ID certificate or a card medium used in a game. In addition, other than the ticket, the copy product may be a printed matter such as a paper medium having a monetary value but not having a monetary value, or may be a security protection label or the like. .. Further, it may be a booklet such as a passport.
(6) In the present embodiment, the image obtained by printing the image of each layer has been described as an example, but the present invention is not limited to this. A pattern image of a bright information layer or a transparent layer may be formed by a method other than printing such as transfer or laser drawing.

(7) In the present embodiment, the reading device has been described by taking a mobile terminal as an example, but the present invention is not limited to this. For example, it may be a personal computer. The reading unit may be a scanner or the like.

5 Reader 10 Printed matter 21 Illumination light source 23 Camera 30 Information recorder 31 Bright base layer 32 Bright information layer 33 Transparent layer 50 Control unit 60 Storage unit 61a Control program 61b Conversion application 63 Code table 65 Reading unit B, B0 to B3, C1 , C2 Image C1a, C2a Printed area C1b, C2b Non-printed area

Claims (7)

An information recorder including a base image, a first image formed on the base image, and a composite image including a second image formed on the first image.
The base image is an image formed of a glittering material and having a halftone dot area ratio of 50% or more and 70% or less.
The first image is made of a glittering material and
The second image is made of a transparent material.
The first image and the second image are
Different pattern images generated by a particular rule,
Each is configured so that the amount of reflected light differs depending on the observation angle.
The composite image can recognize at least one of the first image and the second image depending on the observation angle.
Information recorder. In the information recording body according to claim 1,
The second image is formed in the base image region where the base image is formed.
Information recorder. In the information recording body according to claim 1 or 2.
The base image and the first image are formed of the glittering material having a different color.
Information recorder. In the information recorder according to any one of claims 1 to 3,
The base image is an irregular halftone dot image,
Information recorder. In the information recorder according to claim 4,
The base image is an image obtained by FM screening.
Information recorder. A medium comprising the information recorder according to any one of claims 1 to 5. A booklet comprising the information recording body according to any one of claims 1 to 5.

Images