JP2025111000A - Information processing device, information acquisition system, hologram reading method and program - Google Patents

Abstract

The present invention provides an information processing device, an information acquisition system, a hologram reading method, and a program that eliminate the difficulties involved in reading holograms and improve security by improving the read reconstructed image.
[Solution] An information processing device 1 that reads a hologram structure 3 having a hologram layer with a hologram formation area 3a, and is equipped with a mobile light 1L and an outer camera 1C positioned in close proximity to the mobile light 1L, where light is irradiated from the mobile light 1L, and while light La is irradiated from the mobile light 1L onto the hologram formation area 3a, the outer camera 1C is caused to photograph the hologram formation area 3a, a monochrome image that is an image of one color component is obtained from the image including the hologram formation area 3a obtained by photographing, and information is extracted from the obtained monochrome image.
[Selected Figure] Figure 1

Description

The present invention relates to an information processing device, an information acquisition system, a hologram reading method, and a program.

Holograms have traditionally been used to combat counterfeit products (brand protection), for example. A hologram is created by causing two beams of light with equal wavelengths (object beam and reference beam) to interfere with each other, and recording the wavefront of the object beam as interference fringes on a photosensitive material. When light of the same wavelength as the reference beam used to record the interference fringes is applied, a diffraction phenomenon occurs due to the interference fringes, making it possible for the hologram to reproduce a wavefront identical to the original object beam. Holograms have the advantages of being beautiful in appearance and relatively difficult to duplicate.

However, in recent years, it has become possible to easily counterfeit holograms, and as a result, a variety of holograms that are difficult to counterfeit have been developed. One such hologram can be used as a point light source, such as a pen-shaped LED light or the light on a smartphone. When a point light source is shone on the hologram, letters or images appear, allowing the authenticity to be determined visually (see, for example, Patent Document 1).

Patent No. 6973550

For example, if a two-dimensional code image is embedded in the hologram structure described in Patent Document 1 and the image is reproduced using white light containing multiple wavelengths from a smartphone or the like, the angle of diffraction differs depending on the wavelength of the light, resulting in a reproduced image with a pattern of multiple colors with different wavelengths. This makes it difficult to read the code from the reproduced image.
Furthermore, embedding a code image of individual information such as a serial code in a hologram structure requires the creation of an original plate, which is difficult in terms of production technology and production costs.

The present invention aims to provide an information processing device, information acquisition system, hologram reading method, and program that eliminates the difficulties associated with reading holograms and improves security by incorporating improvements to the reconstructed image that is read.

The present invention solves the above-mentioned problems by the following solution. For ease of understanding, the following description will be given using symbols corresponding to the embodiments of the present invention, but the present invention is not limited to these. Furthermore, the configurations described using symbols may be modified as appropriate, and at least a portion of them may be replaced with other components.

The first invention is an information processing device (1) that reads a hologram structure (3) that includes a hologram layer (31) having a hologram formation region (3 a), the information processing device (1) comprising: an illumination light source (1L); a photographing unit (1C) arranged in proximity to the illumination light source (1L); a lighting means (11) that irradiates light (La) from the illumination light source (1L); a lighting photographing means (12) that causes the photographing unit (1C) to photograph the hologram formation region (3 a) in a state in which light from the illumination light source (1L) is irradiated onto the hologram formation region (3 a) by the lighting means (11); a monochromatic image acquisition means (14) that acquires a monochromatic image (43), which is an image of one color component, from an image (42) including the hologram formation region (3 a) acquired by photographing using the lighting photographing means (12); and an information extraction means (15) that extracts information from the monochromatic image (43) acquired by the monochromatic image acquisition means (14).
A second invention is the information processing device (1) of the first invention, wherein a reflection Fourier transform hologram is recorded in the hologram formation area (3a).
A third invention is the information processing device (1) of the first or second invention, wherein the illumination light source (1L) emits white light.
A fourth invention is the information processing device according to the first or second invention, wherein the illumination light source emits monochromatic light.
A fifth invention is an information processing device (1) according to any one of the first to fourth inventions, wherein the image (42) acquired by photographing using the lighting photographing means (12) includes an image of a code shape, and the information extracted from the monochrome image (43) by the information extraction means (15) is code information.
A sixth invention is an information processing device (1) of the fifth invention, wherein the information extraction means (15) is capable of extracting the information only when the image (42) acquired by photographing using the lighting photographing means (12) includes an image reproduced in the hologram formation area (3 a) obtained by directly irradiating the hologram formation area (3 a) with light (La) from the illumination light source (1L) and photographing the hologram formation area (3 a) including zero-order diffracted light from the hologram formation area (3 a) using the photographing unit (1C).
The seventh invention is an information processing device (201) according to the sixth invention, comprising: a light-off means (211) for turning off the light irradiated from the illumination light source (1L) by the lighting means (211); and a light-off photographing means (1C) for making the photographing unit (1C) photograph the hologram formation area (3a) at the same angle of view as when the lighting means (211) is turned on, in a state in which the light-off means (211) is not irradiating the hologram formation area (3a) from the illumination light source (1L). and an authenticity determination means (216) for determining that the hologram structure (3) is genuine when the information extraction means (15) can extract the information from the monochromatic image (43) when the light is on but cannot extract the information from the monochromatic image when the light is off.
An eighth invention is an information processing device (301) of the seventh invention, wherein the light-on photographing means (212) and the light-off photographing means (212) cause the photographing unit (1C) to photograph the hologram formation area (303a) together with an arrangement code image (353a), which is an image of a code shape arranged near the hologram structure (303), and the authenticity determination means (216) determines that the hologram structure (303) is authentic when the monochromatic image acquired by the monochromatic image acquisition means (14) when the light is on includes images of two code shapes, and when the monochromatic image acquired by the monochromatic image acquisition means (14) when the light is off and at the same angle of view as when the light is on includes an image of one code shape.
The ninth invention is an information acquisition system (100) comprising a hologram structure (3) having a hologram layer (31) having a hologram formation region (3a), and an information processing device (1) for reading the hologram structure (3), wherein a reflection-type Fourier transform hologram is recorded in the hologram formation region (3a) for reconstructing an image around zero-order diffracted light of the hologram formation region (3a) that is reflected by direct irradiation of light from a light source, and the information processing device (1) comprises an illumination light source (1L), a photographing unit (1C) disposed in a position close to the illumination light source (1L), and an information processing device (1) for reading the hologram structure (3). an illumination photographing means (12) for causing the photographing unit (1C) to photograph the hologram formation region (3 a) while light is irradiated onto the hologram formation region (3 a) from the illumination light source (1L) by the illumination means (11); a monochromatic image obtaining means (14) for obtaining a monochromatic image (43) which is an image of one color component from an image (42) including the hologram formation region (3 a) obtained by photographing using the illumination photographing means (12); and an information extraction means (15) for extracting information from the monochromatic image (43) obtained by the monochromatic image obtaining means (14).
A tenth aspect of the present invention is an information acquisition system (300) according to the ninth aspect of the present invention, further comprising a medium (353) having the hologram structure (303) and a placement code image (353a) which is a code-shaped image placed in the vicinity of the hologram structure (303), the placement code image (353a) being an image having first information including relative position information of the hologram formation area (303a) or information associated with the relative position information, and the information processing device (301) includes placement code reading means (317) which reads the first information from the placement code image (353a). and an illumination position acquisition means (318) that acquires an illumination position (362) illuminated by the illumination light source (1L), and a guidance output means (318) that acquires the relative position information from the first information read by the placement code reading means (317) and outputs a guidance line (363) to a display unit (27) based on the acquired relative position information and the illumination position (362) acquired by the illumination position acquisition means (318).
An eleventh invention is an information acquisition system according to the ninth invention, which comprises a medium (453) having the hologram structure (403) and a placement code image (453b) which is a code-shaped image placed near the hologram structure (403), wherein the placement code image (453b) is an image having second information in which at least a portion of the individual information is encrypted, and the information processing device comprises a placement code reading means which reads the second information from the placement code image (453b), and a decoding means which decodes the second information read by the placement code reading means using the information extracted by the information extraction means.
A twelfth invention is an information acquisition system (400) according to the ninth invention, comprising: a medium (453) having the hologram structure (403); and a placement code image (453b) which is a code-shaped image placed in the vicinity of the hologram structure (403); and a server (7) communicably connected to the information processing device (401), wherein the placement code image (453b) is a code-shaped image having second information in which at least a part of the individual information is encrypted, and the information processing device (401) includes a placement code reading means (417) which reads the second information from the placement code image (453b); The information acquisition system (400) comprises an information transmission means (419) that transmits the second information read by the placement code reading means (417) and the information extracted by the information extraction means (15) to the server (7), and the server (7) comprises a key memory unit (77) in which identification information and an encryption key are associated, a key identification means (72) that identifies the encryption key in the key memory unit (77) based on the information received from the information processing device (401), and a decryption means (73) that decrypts the second information received from the information processing device (401) using the encryption key identified by the key identification means (72).
The thirteenth invention is a hologram reading method for reading a hologram structure (3) including a hologram layer (31) having a hologram formation region (3a) using an information processing device (1) having an illumination light source (1L) and a photographing unit (1C) arranged in the vicinity of the illumination light source (1L), wherein a reflection-type Fourier transform hologram is recorded in the hologram formation region (3a) to reconstruct an image around zero-order diffracted light of the hologram formation region (3a) that is reflected by direct light irradiation from a light source, and the information processing device (1) irradiates light (La) from the illumination light source (1L). a lighting photographing step of having the photographing unit (1C) photograph the hologram formation area (3a) while light (La) is irradiated onto the hologram formation area (3a) from the illumination light source (1L) by the lighting step; a monochromatic image acquisition step of acquiring a monochromatic image (43), which is an image of one color component, from an image (42) including the hologram formation area (3a) acquired by photographing in the lighting photographing step; and an information extraction step of extracting information from the monochromatic image (43) acquired by the monochromatic image acquisition step.
A fourteenth aspect of the present invention is a program (21a) executed by an information processing device (1) having an illumination light source (1L) and a photographing unit (1C) arranged in the vicinity of the illumination light source (1L) for reading a hologram structure (3) provided with a hologram layer (31) having a hologram formation region (3a), wherein a reflection-type Fourier transform hologram for reconstructing an image around zero-order diffracted light of the hologram formation region (3a) reflected by direct irradiation of light from a light source is recorded in the hologram formation region (3a), and the information processing device (1) is controlled by a lighting unit for irradiating light (La) from the illumination light source (1L). a lighting photographing means (12) that causes the photographing unit (1C) to photograph the hologram formation area (3a) while light (La) is irradiated onto the hologram formation area (3a) from the illumination light source (1L) by the lighting means (11); a monochromatic image acquisition means (14) that acquires a monochromatic image (43), which is an image of one color component, from an image (42) including the hologram formation area (3a) acquired by photographing using the lighting photographing means (12); and an information extraction means (15) that extracts information from the monochromatic image (43) acquired by the monochromatic image acquisition means (14).

The present invention provides an information processing device, information acquisition system, hologram reading method, and program that eliminate the difficulties associated with reading holograms and improve security by incorporating improvements to the reconstructed image that is read.

1A and 1B are external views of an information processing device according to a first embodiment and diagrams for explaining a method for reading a hologram structure using the information processing device. FIG. 1 is a functional block diagram of an information processing apparatus according to a first embodiment. 3A and 3B are diagrams for explaining a hologram structure according to the first embodiment. 5 is a flowchart showing information acquisition processing of the information processing device according to the first embodiment. FIG. 2 is a diagram for explaining processing in the information processing device according to the first embodiment. FIG. 10 is a functional block diagram of an information processing apparatus according to a second embodiment. 10 is a flowchart showing information acquisition processing of the information processing device according to the second embodiment. This is a continuation of Figure 7. FIG. 10 is a diagram illustrating a medium according to a third embodiment. FIG. 11 is a functional block diagram of an information processing apparatus according to a third embodiment. 11 is a flowchart showing information acquisition processing of the information processing device according to the third embodiment. FIG. 11 is a diagram for explaining processing in an information processing device according to a third embodiment. FIG. 10 is a functional block diagram of an information processing device and a server according to a fourth embodiment. 13 is a flowchart showing information acquisition processing of the information processing device according to the fourth embodiment. 13A and 13B are diagrams illustrating examples of media used in the information acquisition process according to the fourth embodiment. 13 is a flowchart showing an information transmission confirmation process of the information acquisition system according to the fourth embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, this is merely an example, and the technical scope of the present invention is not limited to this example.
(First embodiment)
FIG. 1 is an external view of an information processing device 1 according to the first embodiment and a diagram for explaining a method for reading a hologram structure 3 using the information processing device 1. As shown in FIG.

1A is a mobile terminal such as a smartphone. The information processing device 1 can be used to read a hologram structure 3 by installing a reading processing program 21a (described later).
The information processing device 1 has an outer camera 1C (photographing unit) and a mobile light 1L (illumination light source) on the back of the housing. The outer camera 1C and the mobile light 1L are located close to each other. Here, "close" refers to a state in which the photographing unit and the illumination light source are adjacent to each other, or a state in which the shortest distance between the ends of the photographing unit and the illumination light source is within approximately 10 mm. The close proximity of the photographing unit and the illumination light source makes it easier for the outer camera 1C, which is the photographing unit, to capture an optical image, which is zero-order diffracted light from a hologram formation region, which is reflected light of light La (described below). Note that, as a variation of the information processing device, when multiple photographing units are located on the back of the housing, "close" refers to a state in which the shortest distance between the ends of at least one photographing unit used for photographing and the illumination light source is within approximately 10 mm. The information processing device 1 also has a touch panel display 27 (display unit) (described later) on the front of the housing, opposite the side where the outer camera 1C and the mobile light 1L are located.

The mobile light 1L is a point light source that emits white light containing a plurality of wavelengths, and is, for example, an LED (Light Emitting Diode) light.
The outer camera 1C can capture an image in the direction of illumination of the mobile light 1L. When the outer camera 1C is activated, it outputs a through image, which is an image captured by the outer camera 1C, to the touch panel display 27, whereby the image being captured by the outer camera 1C is displayed on the touch panel display 27.

<Information Acquisition System 100>
FIG. 1B shows the state of the information processing device 1 when reading the hologram structure 3 .
The information acquisition system 100 is a system including the information processing device 1 shown in FIG. 1B and a hologram structure 3 .
Figure 1 (B) shows the positional relationship between the information processing device 1 and the hologram structure 3 when the information processing device 1 is photographing the hologram structure 3 placed on a flat table and is viewed from the side (from the front in the Y direction to the depth direction).
The following drawings, including FIG. 1, are schematic diagrams, and the size and shape of each part are exaggerated or omitted as appropriate to facilitate understanding.
In addition, in the following description, specific numerical values, shapes, materials, etc. may be used, but these may be changed as appropriate.

The hologram structure 3 has a hologram formation area 3a. The information processing device 1 is positioned such that the rear surface of the housing of the information processing device 1 faces the surface of the hologram structure 3. The information processing device 1 then turns on the mobile light 1L to irradiate light La onto the approximate center of the hologram formation area 3a of the hologram structure 3. At this time, the distance between the hologram structure 3 and the mobile light 1L (equivalent to the position of the outer camera 1C) when irradiating light La is approximately 50 mm to 300 mm. This distance allows the entire image of the two-dimensional code formed in the hologram formation area 3a to be observed and photographed through the screen of the information processing device 1. Because the distance between the hologram structure 3 and the mobile light 1L (equivalent to the position of the outer camera 1C) changes over time depending on the performance of the information processing device, the above specification is merely an example for one information processing device at the time of filing. Because the mobile light 1L and outer camera 1C are positioned close to each other, in this state, the outer camera 1C's shooting direction Ca directly receives reflected light of light La. The information processing device 1 controls the outer camera 1C to shoot the hologram formation area 3a.

When the positional relationship between the information processing device 1 and hologram structure 3 is as shown in Figure 1(B), the outer camera 1C can capture an image while directly receiving the zeroth-order diffracted light from the hologram formation region, which is the reflected light of light La. In this way, the image captured by the outer camera 1C and acquired by the information processing device 1 includes the image reconstructed in the hologram formation region 3a (an optical image which is the zeroth-order diffracted light from the hologram formation region, which is the reflected light of light La). When the image reconstructed in the hologram formation region 3a by irradiating it with light is, for example, an image of a two-dimensional code, the information processing device 1 acquires an image including the reconstructed image (optical image).

<Information processing device 1>
Next, the information processing device 1 that reads the hologram structure 3 will be described.
FIG. 2 is a functional block diagram of the information processing device 1 according to the first embodiment.
The information processing device 1 includes a control unit 10, a storage unit 20, an outer camera 1C, a mobile light 1L, a touch panel display 27, and a communication interface unit 29.

The control unit 10 is a CPU (Central Processing Unit) that controls the entire information processing device 1. The control unit 10 appropriately reads and executes an OS (Operating System) and application programs stored in the storage unit 20, thereby cooperating with the above-mentioned hardware and executing various functions.
The control unit 10 includes a light source control unit 11 , a camera control unit 12 , an image acquisition unit 13 , a monochromatic image acquisition unit 14 , and an information extraction unit 15 .

The light source control unit 11 functions as a lighting unit. The light source control unit 11 controls the mobile light 1L to emit light La, and keeps the mobile light 1L continuously outputting light La.
The camera control unit 12 functions as a lighting photographing unit. The camera control unit 12 controls the outer camera 1C to photograph in the photographing direction Ca while the light source control unit 11 is causing the mobile light 1L to emit light La.

The image acquisition unit 13 acquires the image captured by the camera control unit 12. When the light source control unit 11 causes light La to directly irradiate the vicinity of the center position of the hologram formation region 3a and the camera control unit 12 causes an image of the hologram formation region 3a, the image including the hologram formation region 3a acquired by the image acquisition unit 13 includes a reproduced image of multiple colors. This is because the diffraction angle differs depending on the wavelength of the light La irradiated from the mobile light 1L.
Here, the image including the hologram formation area 3a is directly irradiated onto the hologram formation area 3a by light La from the mobile light 1L, and becomes an image including a reproduced image in the hologram formation area 3a, provided that the outer camera 1C directly photographs the hologram formation area 3a including the zeroth-order diffracted light from the hologram formation area 3a.
Note that an image including the hologram formation region 3a acquired with the light La emitted from the mobile light 1L turned off does not include a reconstructed image.

The monochromatic image acquisition unit 14 functions as a monochromatic image acquisition means. The monochromatic image acquisition unit 14 acquires a monochromatic image, which is an image of one color component, from the image including the hologram formation region 3a acquired by the image acquisition unit 13. The monochromatic image acquisition unit 14 acquires, for example, a color image of one of the RGB (Red-Green-Blue) color models. The monochromatic image acquisition unit 14 may acquire an R image, which is a color image of only the R value, a G image, which is a color image of only the G value, or a B image, which is a color image of only the B value. Here, the monochromatic image acquisition unit 14 may acquire any of the RGB color images, but an R image, which is an R image with only the R value, which has a longer wavelength of light La, is more advantageous for reading because the entire image is observed to be larger than other monochromatic images.

The information extraction unit 15 functions as an information extraction means. The information extraction unit 15 extracts information from the monochromatic image acquired by the monochromatic image acquisition unit 14. If the monochromatic image is, for example, an image of a two-dimensional code such as a QR code (registered trademark) or an image of a barcode, the information extraction unit 15 analyzes the image to acquire code information. The information extraction unit 15 can extract information only if the image acquisition unit 13 acquires an image that includes an image to be reproduced in the hologram formation area 3a.

The storage unit 20 is a storage area such as a semiconductor memory element for storing programs, data, etc. required for the control unit 10 to execute various processes.
The storage unit 20 includes a program storage unit 21 .
The program storage unit 21 is a storage area for storing various programs. The program storage unit 21 stores a reading processing program 21a (program). The reading processing program 21a is a program for executing each function of the control unit 10 described above.

The touch panel display 27 functions as a display unit configured with a liquid crystal panel or the like, and also functions as an input unit that detects touch input by the user's finger or the like.
The communication interface unit 29 is an interface for communicating with, for example, an external server.
Note that a computer refers to an information processing device that includes a control unit, a storage device, etc., and the information processing device 1 is an information processing device that includes a control unit 10, a storage unit 20, etc., and is included in the concept of a computer.

<Hologram structure 3>
Next, the hologram structure 3 will be described.
FIG. 3 is a diagram for explaining the hologram structure 3 according to the first embodiment.
The hologram structure 3 shown in Fig. 3(A) is used by being attached to an article, for example. By attaching the hologram structure 3 to an article, the article to which the hologram structure 3 is attached can be considered to be an authentic product and can be used as a countermeasure against counterfeit products.
FIG. 3A shows a plan view of the hologram structure 3 viewed from above in the vertical direction Z downward.
A hologram formation region 3a is provided in the center of the hologram structure 3. The region surrounded by a dashed line in Fig. 3A is the hologram formation region 3a.

Fig. 3(B) is a schematic diagram of a cross section taken along the X1-X1 direction in Fig. 3(A). Fig. 3(B) shows the hologram structure 3 as seen from the front in the Y direction. As shown in Fig. 3(B), the hologram structure 3 has, from top to bottom in the vertical direction Z, a transparent layer 30, a hologram layer 31, a vapor deposition layer 32, and a base layer 33, in that order.
The transparent layer 30 is a light-transmitting layer that protects the hologram layer 31 .
The hologram layer 31 is a layer having a hologram formation region 3 a. A reflection Fourier transform hologram is recorded in the hologram formation region 3 a. The reflection Fourier transform hologram reproduces an image around the zeroth-order diffracted light of the hologram formation region 3 a, which is reflected when the hologram formation region 3 a is directly irradiated with light from a light source. This reproduced image is, for example, a two-dimensional code such as a QR code (registered trademark), and has a shape in which information that can be analyzed by the information processing device 1 is encrypted.

Here, "information in an encrypted form" means that the digital information is in an encrypted form, and that the form is a pattern that is visually different from the original digital information. Also, "analyzable by the information processing device 1" means that the original digital information can be extracted from the pattern-like form using the information processing device 1.
Examples of such shapes include two-dimensional codes such as QR Code (registered trademark), as well as barcodes and electronic watermarks.
The information may be any information that can be protected by encryption, such as an authentication number, a keyword, an internet address (URL), an email address, a product code, a character string indicating that the product is genuine, key information for an encryption key, identification information for specifying the encryption key, etc. A plurality of pieces of this information may be included in the shape represented by one reproduced image.

Furthermore, recording a reflection Fourier transform hologram means that the phase information of the Fourier transform image obtained through the Fourier transform of the original image is multi-valued and recorded as depth. Therefore, an uneven surface 31a is formed in the hologram formation region 3a of the hologram layer 31 where the reflection Fourier transform hologram is recorded.
The hologram layer 31 has the function of converting light incident from the mobile light 1L into a desired image by using the height difference of the uneven shape that constitutes the uneven surface 31a of the hologram formation area 3a. By using this function, light incident from an arbitrary point light source is diffracted in a plurality of predetermined directions, and a predetermined image is formed as a reproduced image.
Other materials that can be used to form the hologram layer 31 include those described in Japanese Patent No. 6973550, for example.

The vapor deposition layer 32 is a layer formed so as to be in contact with the uneven surface 31 a of the hologram formation region 3 a of the hologram layer 31 .
The substrate layer 33 has a flat surface capable of supporting the vapor deposition layer 32, and is made of, for example, white paper, fine paper, coated paper, PET (polyethylene terephthalate), plastic card, or the like.
In addition, when the hologram structure 3 is to be attached to an article, for example, an adhesive layer and a release layer for attachment are provided below the base layer 33 in the vertical direction Z, but a description thereof will be omitted. Furthermore, the layer configuration described above is one example, and the configuration other than the hologram layer 31 is not limited to that described above.

With this hologram layer 31, when a point light source is placed on the observation surface side and the hologram layer 31 is viewed in plan from the observation surface side, the hologram structure 3 can reproduce an image in the hologram formation region 3 a. Therefore, the hologram structure 3 has excellent information confidentiality because only a user who knows that the information to be reproduced by the mobile light 1L is recorded in the hologram formation region 3 a can obtain the information.
Furthermore, the hologram structure 3 can reconstruct an image only when it is irradiated with light from the mobile light 1L, which provides excellent information confidentiality.
Furthermore, since the hologram formation region 3 a is for recording a reflection Fourier transform hologram, the hologram structure 3 allows information to be easily extracted using the information processing device 1 .

<Processing of information processing device 1>
Next, the processing of the information processing device 1 will be described.
FIG. 4 is a flowchart showing the information acquisition process of the information processing device 1 according to the first embodiment.
FIG. 5 is a diagram for explaining the processing in the information processing device according to the first embodiment.
First, when a user operates the information processing device 1 to start the reading processing program 21a, the control unit 10 of the information processing device 1 starts the information acquisition processing shown in FIG.
In this information acquisition process, it is necessary for outer camera 1C to capture an image of hologram formation region 3a including zero-order diffracted light from hologram formation region 3a of hologram structure 3, and to obtain an image to be reproduced in hologram formation region 3a. For this reason, the information processing device 1 and hologram structure 3 are positioned in the positional relationship shown in FIG. 1B to perform the process.

In step S (hereinafter, "step S" will be simply referred to as "S") 11 in FIG. 4, the control unit 10 (camera control unit 12) of the information processing device 1 activates the outer camera 1C.
5A shows an example of the hologram structure 3 displayed on the touch panel display 27 when the outer camera 1C is activated. An image 41 is displayed over the entire area of the hologram structure 3. The image 41 is, for example, a glossy image designed by diffraction grating cells (not shown) in the hologram layer 31, and no code-shaped image is reproduced.
In S12 of FIG. 4, the control unit 10 (light source control unit 11) controls the mobile light 1L to turn on and emit light from the mobile light 1L.

In S13, the control unit 10 (camera control unit 12, image acquisition unit 13) causes the outer camera 1C to capture an image and acquires an image from the outer camera 1C.
Fig. 5(B) shows an example of the hologram formation area 3a displayed on the touch panel display 27 via the outer camera 1C when light is irradiated from the mobile light 1L. An image 42 is displayed in the hologram formation area 3a of the hologram structure 3. The image 42 is a rainbow-colored image in which a code-shaped image is reproduced as a multi-color pattern depending on the wavelength of light. In Fig. 5(B), light is irradiated near the center position of the hologram formation area 3a.

In S14, the control unit 10 (monochromatic image acquisition unit 14) acquires a monochromatic image, which is an image of one color component, from the acquired images.
The control unit 10 can acquire an R image 43 consisting of the R component of RGB shown in Fig. 5(C) as a monochromatic image. The R image 43 is the largest image depending on the wavelength of light, and is therefore an image that is easy for the information processing device 1 to read. Alternatively, the control unit 10 can acquire a G image 44 consisting of the G component shown in Fig. 5(D) or a B image 45 consisting of the B component shown in Fig. 5(E) as a monochromatic image. In either case, the control unit 10 can acquire a monochromatic image with a specified range of light wavelengths as an image of a code shape.

The control unit 10 (information extraction unit 15) performs a process of reading a two-dimensional code from the monochrome image, and in S15 of Fig. 4, the control unit 10 (information extraction unit 15) determines whether or not the two-dimensional code has been read from the acquired monochrome image. If the two-dimensional code has been read (S15: YES), the control unit 10 proceeds to S16. On the other hand, if the two-dimensional code has not been read (S15: NO), the control unit 10 proceeds to S17.
In S16, the control unit 10 performs processing based on the information obtained from the read two-dimensional code, and then ends this processing.

On the other hand, in S17, the control unit 10 determines whether or not to end the process. If the process is to be ended (S17: YES), the control unit 10 ends this process. On the other hand, if the process is not to be ended (S17: NO), the control unit 10 proceeds to S13 and repeatedly executes the image acquisition process. Note that the control unit 10 may end this process if the two-dimensional code still cannot be read after repeating the image acquisition and two-dimensional code reading process a predetermined number of times (e.g., three times).

As described above, the first embodiment has the following advantages.
(1) An information processing device 1 in which a mobile light 1L and an outer camera 1C are arranged in close proximity irradiates light from the mobile light 1L, and while the light is irradiated from the mobile light 1L onto the hologram formation area 3a, causes the outer camera 1C to photograph the hologram formation area 3a, obtains a monochrome image from the image including the hologram formation area 3a obtained by photographing, and extracts information from the obtained monochrome image.
Therefore, information can be extracted by making it possible to read the image reproduced in the hologram formation area 3a obtained by directly photographing the hologram formation area 3a containing the zeroth-order diffracted light from the mobile light 1L with the outer camera 1C.

(2) A reflection Fourier transform hologram is recorded in the hologram formation region 3a of the hologram layer 31.
Therefore, by having the outer camera 1C directly capture an image of the hologram formation area 3a including the zeroth-order diffracted light from the mobile light 1L, an image can be reproduced in the hologram formation area 3a.

(3) The mobile light 1L of the information processing device 1 emits white light.
Therefore, a rainbow image, which is a pattern of multiple colors, is reproduced in the hologram formation area 3a by light of different wavelengths.

(4) The image acquired from the outer camera 1C includes an image of a code shape, and the information extracted from the monochrome image of the image is code information.
Therefore, by reproducing the code-shaped image in the hologram formation region 3a of the hologram structure 3, the code-shaped image can be included in the acquired image. Furthermore, by acquiring a monochromatic image of the image, the code-shaped image is expressed more clearly, and information can be obtained from the code-shaped image.

Second Embodiment
In the second embodiment, a method for determining the authenticity of a hologram structure using an information processing device will be described. In the following description, parts that perform the same functions as those in the first embodiment will be denoted by the same reference numerals or with the same reference numerals at the end, and duplicate descriptions will be omitted as appropriate.

<Information Acquisition System 200>
The information acquisition system 200 is a system including an information processing device 201 and a hologram structure 3 .
<Information processing device 201>
FIG. 6 is a functional block diagram of an information processing apparatus 201 according to the second embodiment.
The information processing device 201 includes a control unit 210 , a storage unit 220 , an outer camera 1</b>C, a mobile light 1</b>L, a touch panel display 27 , and a communication interface unit 29 .
The control unit 210 includes a light source control unit 211 , a camera control unit 212 , an image acquisition unit 13 , a monochrome image acquisition unit 14 , an information extraction unit 15 , and an authenticity determination unit 216 .

The light source control unit 211 functions as a lighting unit and a lighting-off unit. The light source control unit 211 causes the mobile light 1L to emit light La, maintaining the light output. The light source control unit 211 also turns off the light La emitted from the mobile light 1L.
The camera control unit 212 functions as a light-on imaging means and an off-light imaging means. The camera control unit 212 causes the outer camera 1C to capture an image of the hologram formation area 3a in the imaging direction Ca while the light source control unit 211 is causing the mobile light 1L to emit light La. The camera control unit 212 also causes the outer camera 1C to capture an image of the hologram formation area 3a in the imaging direction Ca after the light source control unit 211 turns off the light La emitted from the mobile light 1L.

The authenticity determination unit 216 functions as an authenticity determination means and determines that the hologram structure 3 is authentic when the information extraction unit 15 can extract information from the monochromatic image acquired when the light is on but cannot extract information from the monochromatic image acquired when the light is off.
The storage unit 220 includes a program storage unit 221 .
The program storage unit 221 stores a reading processing program 221a (program). The reading processing program 221a is a program for executing each function of the control unit 210.

<Processing of information processing device 201>
Next, the processing of the information processing device 201 will be described.
7 and 8 are flowcharts showing information acquisition processing of the information processing apparatus 201 according to the second embodiment.
In this process, the information processing device 201 and the hologram structure 3 are also positioned as shown in FIG. 1B before the process is started.
The processes from S211 to S215 in FIG. 7 are the same as the processes from S11 to S15 in the first embodiment (FIG. 4).

If the result of the process at S215 is YES, the control unit 210 proceeds to S221 in Fig. 8. On the other hand, if the result of the process at S215 is NO, the control unit 210 proceeds to S216.
In S216, the control unit 210 determines whether or not to end the process. If the process is to be ended (S216: YES), the control unit 210 ends this process. On the other hand, if the process is not to be ended (S216: NO), the control unit 210 proceeds to S213 and repeatedly executes the image acquisition process. Note that the control unit 210 may end this process if the two-dimensional code still cannot be read after repeating the image acquisition and two-dimensional code reading process a predetermined number of times (e.g., three times).

In S217, the control unit 210 (authenticity determination unit 216) outputs to the touch panel display 27 a message indicating that the hologram structure 3 could not be determined to be genuine.
This process occurs when the hologram formation area 3a is photographed with the mobile light 1L turned on, but the two-dimensional code cannot be read. In such cases, it is possible that the hologram structure 3 is a fake. It is also possible that the light from the mobile light 1L is not directly irradiated onto the hologram formation area 3a, and the outer camera 1C is not able to directly photograph the hologram formation area 3a containing the zeroth-order diffracted light from the hologram formation area 3a. If the light from the mobile light 1L is not directly irradiated onto the hologram formation area 3a, it is possible that the outer camera 1C is not able to photograph the image reproduced in the hologram formation area 3a, and therefore the two-dimensional code cannot be read.
Thereafter, the control unit 210 ends this process.

8, the control unit 210 (light source control unit 211) controls the mobile light 1L to turn off, so that the mobile light 1L no longer emits light.
In S222, the control unit 210 (camera control unit 212, image acquisition unit 13) causes the outer camera 1C to capture an image and acquires an image from the outer camera 1C.
In S223, the control unit 210 (monochromatic image acquisition unit 14) acquires a monochromatic image, which is an image of one color component, from the acquired images.
The control unit 210 (information extraction unit 15) reads the two-dimensional code from the monochromatic image, and in S224, the control unit 210 (information extraction unit 15) determines whether the two-dimensional code has been read from the acquired monochromatic image. If the two-dimensional code has been read (S224: YES), the control unit 210 proceeds to S225. On the other hand, if the two-dimensional code has not been read (S224: NO), the control unit 210 proceeds to S226.

In S225, the control unit 210 (authenticity determination unit 216) outputs to the touch panel display 27 a message indicating that the hologram structure 3 is a fake.
The process transitions to this step when the two-dimensional code can be read by photographing the hologram formation area 3a with the mobile light 1L turned on, and when the two-dimensional code can be read by photographing the hologram formation area 3a with the mobile light 1L turned off. In this case, it is possible that what was read was not the hologram structure 3, but rather the image of the two-dimensional code itself, such as a printed image of the two-dimensional code reproduced by the hologram formation area 3a. The hologram structure 3 changes its image, becoming visible or invisible depending on whether the point light source is on or off. However, when the process transitions to this step, the two-dimensional code can be read regardless of whether the point light source is on or off. Therefore, in this case, it can be determined that the hologram structure 3 is a fake.
Thereafter, the control unit 210 ends this process.

On the other hand, in S226, the control unit 210 (authenticity determination unit 216) outputs to the touch panel display 27 a message indicating that the hologram structure 3 is genuine.
This process occurs when the hologram formation area 3a is photographed with the mobile light 1L on and the two-dimensional code can be read, and when the hologram formation area 3a is photographed with the mobile light 1L off and the two-dimensional code cannot be read. The two-dimensional code reading results under these two conditions can occur only if the hologram structure 3 is authentic. Therefore, in this case, it can be determined that the hologram structure 3 is authentic.
Thereafter, the control unit 210 ends this process.

As described above, the second embodiment has the following advantages.
The information processing device 201 extracts information from a monochrome image obtained by photographing the hologram formation area 3a when the mobile light 1L is on, then turns off the light emitted from the mobile light 1L, and causes the outer camera 1C to photograph the hologram formation area 3a at the same angle of view as when it is on, with no light being irradiated from the mobile light 1L onto the hologram formation area 3a, and if information cannot be extracted from the monochrome image obtained by photographing, it determines that the hologram structure 3 is genuine.
Therefore, whether or not the hologram structure 3 is authentic can be determined based on whether or not information can be acquired from the image of the hologram formation area 3 a captured by turning on and off the mobile light 1 L. As a result, the authenticity of the hologram structure 3 can be easily determined.

(Third embodiment)
In the third embodiment, a medium having a hologram structure and a normally printed two-dimensional code is read by an information processing device, and an image reproduced by the hologram formation area of the hologram structure is reliably captured by the information processing device.

<Information Acquisition System 300>
The information acquisition system 300 is a system including an information processing device 301 and a medium 353 .
<Medium 353>
First, the medium 353 read by the information processing device 301 will be described.
FIG. 9 is a diagram illustrating a medium 353 according to the third embodiment.
9A is used by being attached to an article, for example. By attaching the medium 353 to an article, the article to which the medium 353 is attached can be considered to be an authentic product and can be used as a countermeasure against counterfeit products.
FIG. 9A shows a plan view of the medium 353 viewed from above in the vertical direction Z downward.
The medium 353 has the hologram structure 303 on the left side and a two-dimensional code 353a (placement code image) on the right side.

The hologram structure 303 reproduces, for example, an image of a two-dimensional code in a hologram formation region 303a.
The two-dimensional code 353a has relative position information (first information) of the hologram formation region 303a of the hologram structure 303. Note that the two-dimensional code 353a may have information associated with the relative position information of the hologram formation region 303a of the hologram structure 303.

FIG. 9(B) is a schematic diagram of a cross section taken along the X2-X2 direction in FIG. 9(A). FIG. 9(B) shows the medium 353 as seen from the front in the Y direction. As shown in FIG. 9(B), the medium 353 has, from top to bottom in the vertical direction Z, a transparent layer 330 and a base layer 333. In the region of the hologram structure 303, a hologram layer 31 and a vapor deposition layer 32 are located between the transparent layer 330 and the base layer 333. In addition, in the region of the two-dimensional code 353a, a printing layer 334 is located above the transparent layer 330. It is assumed that the printing layer 334 will be printed after the medium having the hologram layer 31 and the like is created.
The print layer 334 is a layer on which the two-dimensional code 353a is printed, and includes, for example, a coloring material and a resin material.

Figure 9(C) shows medium 353 in a state where zero-order diffracted light from hologram formation region 303a, which is reflected by direct light irradiation from the light source, reconstructs an image in hologram formation region 303a. Hologram structure 303 reconstructs image 342 as an image in hologram formation region 303a.

<Information processing device 301>
FIG. 10 is a functional block diagram of an information processing apparatus 301 according to the third embodiment.
The information processing device 301 includes a control unit 310, a storage unit 320, an outer camera 1C, a mobile light 1L, a touch panel display 27, and a communication interface unit 29.
The control unit 310 includes a light source control unit 11 , a camera control unit 12 , an image acquisition unit 13 , a monochrome image acquisition unit 14 , an information extraction unit 15 , a placement code reading unit 317 , and a guidance processing unit 318 .

The alignment code reader 317 functions as alignment code reading means. The alignment code reader 317 reads the two-dimensional code 353a to obtain relative position information. The relative position information may be directly included in the two-dimensional code 353a, or the relative position information linked to the read information may be stored in advance in the information processing device 301. The obtained relative position information is information about the relative position of the hologram formation region 303a with the two-dimensional code 353a. When the alignment code reader 317 reads the two-dimensional code 353a, it can detect the position of the hologram formation region 303a from the position of the two-dimensional code 353a. Here, the position of the two-dimensional code 353a can be detected, for example, by using a marker on the two-dimensional code 353a.
An advantage of reading the two-dimensional code 353a by the placement code reader 317 is that the position of the hologram formation area 303a within the image including the hologram formation area 303a becomes clear, and the range of processing by the information extraction unit 15 can be limited. This enables faster and more accurate processing.

The guidance processing unit 318 functions as an irradiation position acquisition unit and a guidance output unit. The guidance processing unit 318 acquires the irradiation position of the mobile light 1L on the medium 353. The guidance processing unit 318 also acquires relative position information of the hologram formation area 303a from the relative position information read by the placement code reading unit 317, and outputs, to the touch panel display 27, a guidance line for guiding the irradiation position toward the center of the hologram formation area 303a based on the acquired relative position information and the irradiation position.
The storage unit 320 includes a program storage unit 321 .
The program storage unit 321 stores a reading processing program 321a (program). The reading processing program 321a is a program for executing each function of the control unit 310.

<Processing of information processing device 301>
Next, the processing of the information processing device 301 will be described.
FIG. 11 is a flowchart showing information acquisition processing of the information processing apparatus 301 according to the third embodiment.
FIG. 12 is a diagram for explaining the processing in the information processing device 301 according to the third embodiment.
In this process, the information processing device 301 is also placed at a position where the entire medium 353 is included in the angle of view, and then the process is started.
The processes from S311 to S313 in FIG. 11 are the same as the processes from S11 to S13 in the first embodiment (FIG. 4).
In S314, the control unit 310 (the placement code reading unit 317) reads the placed two-dimensional code 353a and obtains relative position information of the hologram formation region 303a of the hologram structure 303.
The processes of S315 and S316 are similar to the processes of S14 and S15 in the first embodiment (FIG. 4).

If the determination in S316 is YES, the control unit 310 proceeds to S317, whereas if the determination in S316 is NO, the control unit 310 proceeds to S318.
The process of S317 is the same as the process of S16 in the first embodiment (FIG. 4), and then this process ends.
On the other hand, in S318, the control unit 310 (guidance processing unit 318) performs guidance display processing. Specifically, the control unit 310 (guidance processing unit 318) acquires the irradiation position of the mobile light 1L. Furthermore, based on the relative position information acquired in the processing of S317 and the irradiation position, the control unit 310 (guidance processing unit 318) causes the touch panel display 27 to output a guidance line for guiding the irradiation position toward the center of the hologram formation area 303a.

12 shows the state of the data output to the touch panel display 27 of the information processing device 301. The touch panel display 27 displays a center position 361 of the hologram formation region 303a, an irradiation position 362, and a guiding line 363. The control unit 310 can identify and acquire the irradiation position 362, for example, from the amount of light and its shape. The control unit 310 can also set the center position 361 of the hologram formation region 303a from the relative position information. The control unit 310 can then output a guiding line 363 that connects the irradiation position 362 and the center position 361 with a straight line.
By outputting the guiding line 363, the information processing device 301 can guide the user to place the irradiation position 362 on the center position 361 of the hologram formation area 303a.

The processing of S319 is the same as the processing of S17 in the first embodiment (Figure 4), and then this processing ends.

As described above, the third embodiment has the following advantages.
The information acquisition system 300 comprises an information processing device 301 and a medium 353, in which the hologram structure 303 and the two-dimensional code 353a are positioned in close proximity to each other, and relative position information of the hologram formation area 303a can be acquired from the two-dimensional code 353a, and the information processing device 301 reads the relative position information from the two-dimensional code 353a, acquires the irradiation position 362 illuminated by the mobile light 1L, and outputs to the touch panel display 27, based on the relative position information and the irradiation position 362, a guidance line 363 for guiding the irradiation position 362 in the direction of the center position 361 of the hologram formation area 303a.
Therefore, the mobile light 1L can be guided to irradiate light in the direction of the center position 361 of the hologram formation area 303a, and in accordance with this guidance, the outer camera 1C can directly photograph the hologram formation area 303a including the zeroth-order diffracted light of the hologram formation area 303a.

(Modification 1 of the third embodiment)
In the third embodiment, if the control unit 310 can read the two-dimensional code in the process of S315 in Fig. 11 (S315: YES), it executes processing based on the information (S316), but this is not limited to this. For example, as in the second embodiment, the information processing device may determine the authenticity of the hologram structure 303. In that case, the information processing device may perform the processes from S221 onwards in Fig. 8 instead of the process of S316.

(Modification 2 of the third embodiment)
Instead of the method described in the first modified example, the number of detected two-dimensional codes may be used as a method of determining authenticity. For example, instead of S315, the information processing device determines whether or not two two-dimensional codes have been detected, and if two two-dimensional codes have been detected, performs the processes from S221 to S223 in Fig. 8. Then, instead of S224 in Fig. 8, the information processing device determines whether or not one two-dimensional code has been detected, and if one two-dimensional code has been detected, outputs a message indicating that the item is genuine, and if not, outputs a message indicating that the item is fake.
In this way, it is possible to easily determine whether the hologram structure is a counterfeit or not.

(Modification 3 of the third embodiment)
In the above embodiment, the two-dimensional code directly includes relative position information, but the present invention is not limited to this. The two-dimensional code may include, for example, code information (information associated with relative position information). In this case, the information processing device obtains the code information from the two-dimensional code and transmits it to, for example, a server communicatively connected to the information processing device. The server then transmits relative position information corresponding to the code information, and the information processing device may obtain the relative position information.

(Fourth embodiment)
In the fourth embodiment, a medium having a hologram structure and a normally printed two-dimensional code is read by an information processing device, and individual information encrypted and recorded in the normally printed two-dimensional code is then decoded using the image reproduced by the hologram formation area of the hologram structure.

<Information Acquisition System 400>
FIG. 13 is a functional block diagram of an information processing device 401 and a server 7 according to the fourth embodiment.
The information acquisition system 400 includes an information processing device 401, a server 7, and a medium 453 (described later).
The information processing device 401 and the server 7 are connected via a communication network N so as to be able to communicate with each other.
The communication network N is a network for communication between the information processing device 401 and the server 7. The communication network N is, for example, a communication network such as the Internet, and may be wired or wireless.

<Information processing device 401>
The information processing device 401 includes a control unit 410, a storage unit 420, an outer camera 1C, a mobile light 1L, a touch panel display 27, and a communication interface unit 29.
The control unit 410 includes a light source control unit 11 , a camera control unit 12 , an image acquisition unit 13 , a monochrome image acquisition unit 14 , an information extraction unit 15 , a placement code reading unit 417 , and an information transmission processing unit 419 .

The placement code reading unit 417 functions as a placement code obtaining unit, and reads the two-dimensional code 453b to obtain encrypted individual information (second information) obtained by encrypting at least a part of the individual information.
The information transmission processing unit 419 functions as an information transmitting unit. The information transmission processing unit 419 transmits the encrypted individual information read by the placement code reading unit 417 and the hologram extraction information extracted by the information extraction unit 15 to the server 7.
The storage unit 420 includes a program storage unit 421 .
The program storage unit 421 stores a reading processing program 421a (program). The reading processing program 421a is a program for executing each function of the control unit 410.

<Server 7>
The server 7 performs processing using the encrypted individual information and hologram extraction information received from the information processing device 401 .
The server 7 includes a control unit 70 , a storage unit 75 , and a communication interface unit 79 .
The control unit 70 is a CPU that controls the entire server 7. The control unit 70 appropriately reads and executes the OS and application programs stored in the storage unit 75, thereby cooperating with the above-mentioned hardware and executing various functions.
The control unit 70 includes an information receiving unit 71 , a key identifying unit 72 , and a decrypting unit 73 .
The information receiving unit 71 receives the encrypted individual information and the hologram extraction information from the information processing device 401 .
The key identification unit 72 functions as a key identification means and identifies the encryption key in the key storage unit 77 based on the hologram extraction information.
The decryption unit 73 has a function as a decryption unit, and decrypts the encrypted individual information using the encryption key identified by the key identification unit 72.

The storage unit 75 is a storage area such as a hard disk or semiconductor memory device for storing programs, data, etc. required for the control unit 70 to execute various processes.
The storage unit 75 includes a program storage unit 76 and a key storage unit 77 .
The program storage unit 76 is a storage area that stores programs and the like for executing the functions of the control unit 70 .
The key storage unit 77 is a storage area for storing an encryption key in association with identification information. Here, the identification information is used to identify the encryption key and corresponds to the hologram extraction information.
The communication interface unit 79 is an interface for communicating with the information processing device 401 and the like.
It should be noted that a computer refers to an information processing device equipped with a control unit, a storage device, etc., and the server 7 is an information processing device equipped with a control unit 70, a storage unit 75, etc., and is included in the concept of a computer.

<Processing of information processing device 401>
Next, the processing of the information processing device 401 will be described.
FIG. 14 is a flowchart showing information acquisition processing of the information processing apparatus 401 according to the fourth embodiment.
FIG. 15 is a diagram showing an example of a medium 453 used in the information acquisition process according to the fourth embodiment.
In this process, the information processing device 401 is also placed at a position where the entire medium 453 (see FIG. 15) is included in the angle of view, and then the process is started.
The processes from S411 to S413 in FIG. 14 are the same as the processes from S11 to S13 in the first embodiment (FIG. 4).
In S414, the control unit 410 (placement code reading unit 417) reads the placed two-dimensional code 453b and obtains the encrypted individual information.

The processes of S415 and S416 are similar to the processes of S14 and S15 in the first embodiment (FIG. 4).
Fig. 15 shows an image of medium 453 acquired in the process of S415 in Fig. 14. Medium 453 has hologram structure 403 and two-dimensional code 453b arranged in close proximity. Hologram structure 403 reproduces a two-dimensional code that can be converted into hologram-extracted information as an image. Furthermore, two-dimensional code 453b is capable of obtaining encrypted individual information.
The image shown in Figure 15 was obtained by directly irradiating the hologram formation area of the hologram structure 403 of the medium 453 with light from the mobile light 1L, and then photographing the hologram formation area containing the zeroth-order diffracted light with the outer camera 1C, thereby obtaining a monochrome image.

14, if the result of the process in S416 is YES, the control unit 410 proceeds to S417, whereas if the result of the process in S416 is NO, the control unit 410 proceeds to S418.
In S417, the control unit 410 performs an information transmission confirmation process, which will be described later, and then ends this process.
On the other hand, the process of S418 is the same as the process of S17 in the first embodiment (FIG. 4), and then this process ends.

Next, the information transmission confirmation process will be described with reference to FIG.
FIG. 16 is a flowchart showing the information transmission confirmation process of the information acquisition system according to the fourth embodiment.
In S431 of Figure 16, the control unit 410 (information transmission processing unit 419) of the information processing device 401 transmits to the server 7 the hologram extraction information read from the two-dimensional code obtained from the monochrome image of the hologram structure 403 and the encrypted individual information read from the two-dimensional code 453b.
When the control unit 70 (information receiving unit 71) of the server 7 receives information from the information processing device 401, in S432, the control unit 70 (key identifying unit 72) refers to the key memory unit 77 and identifies the encryption key from the identification information based on the hologram extraction information.
In S433, the control unit 70 (decryption unit 73) decrypts the encrypted individual information using the identified encryption key to obtain the individual information.

Here, if the hologram structure 403 is genuine, the key identification unit 72 can identify the encryption key in the process of S432, but if the hologram structure 403 is not genuine, the key identification unit 72 may not be able to identify the key in the process of S432. In that case, the individual information described below cannot be acquired.
Furthermore, if the hologram structure 403 is not authentic, even if the key identification unit 72 is able to identify the key in the process of S432, the encrypted individual information cannot be decrypted using the identified encryption key in the process of S433. In this case, the individual information cannot be obtained as a result, as will be described later.

In S<b>434 , the control unit 70 transmits the acquisition result of the individual information to the information processing device 401 .
In S435, the control unit 410 of the information processing device 401 receives the acquisition result of the individual information and performs processing based on the content of the acquisition result. For example, when the information processing device 401 receives the individual information as the acquisition result of the individual information, the control unit 410 can perform processing using the individual information, such as outputting an individual web page.

As described above, the fourth embodiment has the following advantages.
Information acquisition system 400 includes information processing device 401, server 7, and medium 453, medium 453 is arranged in a position where hologram structure 403 and two-dimensional code 453b are close to each other and can acquire encrypted individual information from two-dimensional code 453b, and information processing device 401 transmits hologram extracted information read from the two-dimensional code obtained from a monochrome image of an image reproduced in a hologram formation area of hologram structure 403 and the encrypted individual information obtained from two-dimensional code 453b to server 7. Server 7 identifies a key from the identification information based on the hologram extracted information and decrypts the encrypted individual information using the identified key.
Therefore, by making it possible to obtain identification information linked to the encryption key from the hologram structure 403 and making it possible to read the individual information encrypted in the two-dimensional code 453b, the medium 453 can be made to be one that ensures security while making it possible to obtain individual information.

(Modification of the fourth embodiment)
In the fourth embodiment, the decryption is performed using the server 7, but the present invention is not limited to this. For example, the hologram structure 403 may have key information instead of the authentication information, and the decryption process may be performed in the information processing device 401. In this case, the key information may be the key itself, or may be linking information linked to the key, and the information processing device 401 may acquire the key from the linking information.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. Furthermore, the effects described in the embodiments are merely a list of the most favorable effects resulting from the present invention, and the effects of the present invention are not limited to those described in the embodiments. The above-described embodiments and the modified forms described below can also be used in appropriate combinations, but detailed explanations will be omitted.

(Modified form)
(1) In each embodiment, the information processing device is described as a smartphone, and the mobile light emits white light containing multiple wavelengths. However, this is not limited to this. The illumination light source provided in the information processing device may emit monochromatic light. In this case, the image including the hologram formation region captured by the capture unit corresponds to the wavelength of the emitted light, making it easier to capture a monochromatic image. Monochromatic light, for example, refers to light in the wavelength range of 635 nm to 690 nm for light that outputs a monochromatic red color, or light in the wavelength range of 520 nm to 532 nm for light that outputs a monochromatic green color. Light within the red or green wavelength range may be red or green containing multiple wavelengths, or red or green with a single wavelength.

(2) In each embodiment, the image reproduced in the hologram formation area is described as a QR code (registered trademark), but this is not limited to this. It may also be another two-dimensional code, a barcode, etc.

(3) In each embodiment, a label has been described as an example of a hologram structure, but this is not limiting. Anything that has a hologram structure may be used, for example, a ticket used to enter an amusement facility, or a card used in a game.

(4) In each embodiment, the hologram structure has been described as being square-shaped, but this is not limited to this. For example, it may be rectangular, circular, elliptical, or another shape.

(5) In the third and fourth embodiments, a medium having a printing layer with a two-dimensional code printed on the exposed side of the transparent layer has been described as an example, but this is not limiting. For example, the medium may have a transparent layer only on the area having the hologram layer, with a portion of the base layer exposed, and the exposed base layer may have a printing layer.
Alternatively, the medium may have a print layer in addition to the hologram layer.

1, 201, 301, 401 Information processing device 1C Out camera 1L Mobile light 3, 303, 403 Hologram structure 3a, 303a Hologram formation area 7 Server 10, 70, 210, 310, 410 Control unit 11, 211 Light source control unit 12, 212 Camera control unit 13 Image acquisition unit 14 Monochromatic image acquisition unit 15 Information extraction unit 20, 75, 220, 320, 420 Storage unit 21a, 221a, 321a, 421a Reading processing program 27 Touch panel display 30, 330 Transparent layer 31 Hologram layer 31a Textured surface 32 Vapor deposition layer 33, 333 Base material layer 41, 42, 342 Image 43 R image 44 G image 45 B image 71 Information receiving unit 72 Key identification unit 73 Decryption unit 77 Key storage unit 100, 200, 300, 400 Information acquisition system 216 Authenticity determination unit 317, 417 Placement code reading unit 318 Guidance processing unit 334 Printing layer 353, 453 Medium 353a, 453b Two-dimensional code 361 Center position 362 Irradiation position 363 Guidance line 419 Information transmission processing unit La Light

Claims (14)

An information processing device that reads a hologram structure having a hologram layer having a hologram formation area,
an illumination source;
an imaging unit disposed in proximity to the illumination light source;
lighting means for irradiating light from the illumination light source;
a lighting photographing means for causing the photographing unit to photograph the hologram formation area while the lighting means is irradiating the hologram formation area with light from the illumination light source;
a monochrome image acquisition means for acquiring a monochrome image, which is an image of one color component, from an image including the hologram formation region acquired by the lighting image acquisition means;
an information extraction means for extracting information from the monochromatic image acquired by the monochromatic image acquisition means;
An information processing device comprising: 2. The information processing device according to claim 1,
An information processing device, wherein a reflection Fourier transform hologram is recorded in the hologram formation area. 2. The information processing device according to claim 1,
The information processing device, wherein the illumination light source emits white light. 2. The information processing device according to claim 1,
The information processing device, wherein the illumination light source emits monochromatic light. 2. The information processing device according to claim 1,
The image acquired by the lighting image capturing means includes an image of a code shape,
The information processing device, wherein the information extracted from the monochrome image by the information extraction means is code information. 6. The information processing device according to claim 5,
An information processing device in which the information extraction means is capable of extracting the information only when the image acquired by photographing using the lighting photographing means includes an image reproduced in the hologram formation area, which is obtained by directly irradiating the hologram formation area with light from the illumination light source and photographing the hologram formation area including zero-order diffracted light from the hologram formation area using the photographing unit. 7. The information processing device according to claim 6,
a light-off means for turning off the light emitted from the illumination light source by the lighting means;
a light-off photographing means for causing the photographing unit to photograph the hologram formation area at the same angle of view as when the light is turned on by the lighting means, when the light-off means is preventing the hologram formation area from being irradiated with light from the illumination light source; and
Equipped with
the monochromatic image acquisition means acquires the monochromatic image from the image acquired by the unlighted image acquisition means,
An information processing device comprising an authenticity determination means that determines that the hologram structure is genuine if the information extraction means can extract the information from the monochromatic image when the light is on but cannot extract the information from the monochromatic image when the light is off. 8. The information processing device according to claim 7,
the light-on photographing means and the light-off photographing means cause the photographing unit to photograph the hologram formation area together with an arrangement code image, which is an image of a code shape arranged near the hologram structure;
The authenticity determination means determines that the hologram structure is authentic if the monochrome image acquired by the monochrome image acquisition means when the light is on includes two code-shaped images, and if the monochrome image acquired by the monochrome image acquisition means when the light is off and at the same angle of view as when the light is on includes one code-shaped image. a hologram structure including a hologram layer having a hologram forming area;
an information processing device that reads the hologram structure;
An information acquisition system comprising:
a reflection-type Fourier transform hologram is recorded in the hologram formation region, which reproduces an image around zero-order diffracted light of the hologram formation region that is reflected by direct light irradiated from a light source;
The information processing device includes:
an illumination source;
an imaging unit disposed in proximity to the illumination light source;
lighting means for irradiating light from the illumination light source;
a lighting photographing means for causing the photographing unit to photograph the hologram formation area while the lighting means is irradiating the hologram formation area with light from the illumination light source;
a monochrome image acquisition means for acquiring a monochrome image, which is an image of one color component, from an image including the hologram formation region acquired by the lighting image acquisition means;
an information extraction means for extracting information from the monochromatic image acquired by the monochromatic image acquisition means;
An information acquisition system comprising: 10. The information acquisition system according to claim 9,
a medium having the hologram structure and an arrangement code image, which is an image of a code shape, arranged in the vicinity of the hologram structure;
the placement code image is an image having first information including relative position information of the hologram formation region or information associated with the relative position information,
The information processing device includes:
a placement code reading means for reading the first information from the placement code image;
an illumination position acquisition means for acquiring an illumination position illuminated by the illumination light source;
a guidance output means for acquiring the relative position information from the first information read by the placement code reading means, and outputting, to a display unit, a guidance line for guiding the irradiation position toward the center of the hologram formation area, based on the acquired relative position information and the irradiation position acquired by the irradiation position acquisition means;
An information acquisition system comprising: 10. The information acquisition system according to claim 9,
a medium having the hologram structure and an arrangement code image, which is an image of a code shape, arranged in the vicinity of the hologram structure;
the placement code image is an image having second information obtained by encrypting at least a part of the individual information,
The information processing device includes:
a placement code reading means for reading the second information from the placement code image;
a decoding means for decoding the second information read by the placement code reading means using the information extracted by the information extracting means;
An information acquisition system comprising: 10. The information acquisition system according to claim 9,
a medium having the hologram structure and an arrangement code image, which is an image of a code shape, arranged in the vicinity of the hologram structure;
a server communicably connected to the information processing device;
Equipped with
the placement code image is a code-shaped image having second information obtained by encrypting at least a part of the individual information,
The information processing device includes:
a placement code reading means for reading the second information from the placement code image;
an information transmitting means for transmitting the second information read by the placement code reading means and the information extracted by the information extracting means to the server;
Equipped with
The server
a key storage unit in which identification information and encryption keys are associated with each other;
a key specifying unit that specifies the encryption key of the key storage unit based on the information received from the information processing device;
a decryption means for decrypting the second information received from the information processing device using the encryption key identified by the key identification means;
An information acquisition system comprising: 1. A hologram reading method for reading a hologram structure including a hologram layer having a hologram formation area, using an information processing device having an illumination light source and an imaging unit disposed in proximity to the illumination light source, comprising:
a reflection-type Fourier transform hologram is recorded in the hologram formation region, which reproduces an image around zero-order diffracted light of the hologram formation region that is reflected by direct light irradiated from a light source;
The information processing device,
a lighting step of irradiating light from the illumination light source;
a lighting photographing step of photographing the hologram formation area by the photographing unit while the hologram formation area is irradiated with light from the illumination light source by the lighting step;
a monochromatic image acquisition step of acquiring a monochromatic image, which is an image of one color component, from the image including the hologram formation region acquired by the lighting image acquisition step;
an information extraction step of extracting information from the monochromatic image acquired in the monochromatic image acquisition step;
A hologram reading method comprising: A program executed by an information processing device having an illumination light source and an imaging unit disposed in the vicinity of the illumination light source, the program reading a hologram structure including a hologram layer having a hologram formation area,
a reflection-type Fourier transform hologram is recorded in the hologram formation region, which reproduces an image around zero-order diffracted light of the hologram formation region that is reflected by direct light irradiated from a light source;
The information processing device
lighting means for irradiating light from the illumination light source;
a lighting photographing means for causing the photographing unit to photograph the hologram formation area while the lighting means is irradiating the hologram formation area with light from the illumination light source;
a monochrome image acquisition means for acquiring a monochrome image, which is an image of one color component, from an image including the hologram formation region acquired by the lighting image acquisition means;
an information extraction means for extracting information from the monochromatic image acquired by the monochromatic image acquisition means;
A program that makes things work.