JP2006040059A - Object information acquiring device, object authentication devices, and control method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To match a photographing range and an RFID reading range by carrying out the interlock control of photographing parameters and RFID reading parameters when reading an RFID tag attached to an object at the time of photographing the object. <P>SOLUTION: A parameter control part 130 controls photographing parameters and reading parameters so that the photographing range 11 when an image photographing part 110 photographs the object B and the reading range 12 when an RFID reading part 120 reads an RFID tag attached to the object B are matched. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an object information acquisition apparatus, an object authentication apparatus, and a control method thereof using radio frequency identification (RFID) technology.

  The radio frequency identification (RFID) technology is a technology for identifying a tag by reading data such as an identifier held by an RFID tag (or an IC tag, an IC card, etc.) from the outside using an electromagnetic wave in a non-contact manner. Various application fields can be considered by providing a memory writable to the tag or combining sensors. RFID tags are broadly classified into active (with power supply) tags and passive (without power supply) tags depending on whether or not a power supply (battery) is mounted on the tag.

  In recent years, passive RFID tags that operate using electromagnetic waves supplied from external devices have been rapidly expanding their application fields with the progress of miniaturization technology. Well-known examples include contactless IC card-type commuter passes and entrance cards.

  Also, the RFID tag built in the seal is affixed to the article, and the presence of the RFID tag and the stored information are automatically detected by the RFID reader installed near the place where the article is placed or the entrance of the room. Can be used to prevent unauthorized removal and theft. Furthermore, as a next-generation article identification technology that replaces barcodes, a concept is proposed that will be used for efficient article management at all stages of supply chain management (production, distribution, and sales).

  Many of the passive RFID tags described above can be read only near the RFID reader (several centimeters to several tens of centimeters) because the transmission power is weak. However, active RFID tags can increase the transmission power. It is possible to read from a relatively distant place (about several meters).

  As described above, if the RFID tag can be attached (attached, incorporated, embedded) to all the objects, the object can be easily identified using the RFID reader.

  However, since the RFID tag and the target object are originally different, the RFID tag can be intentionally removed from the target object (peeled and removed) and used alone. In particular, a non-contact IC card carried by a person (such as an identification card or an entrance card) can be used very easily by another person. In addition, the RFID tag may be detached from the object due to some accident.

  Further, the RFID reader cannot always read the RFID tag with 100% certainty. For example, depending on the positional relationship (distance and orientation) between the tag and the reader, the reading accuracy may change, multiple RFID tags may overlap, or there may be a conductor such as metal around the RFID tag. Often, the reading accuracy is greatly reduced.

  Therefore, even if the object is identified and authenticated using only the RFID tag, high reliability cannot be obtained.

In order to solve such a problem, for example, Patent Document 1 proposes an image authentication system in which a camera and an RF receiver (RFID reader) are combined. Simultaneously with camera shooting, RFID is read, and the captured image data and the read identifier are integrated to generate composite data, thereby guaranteeing that the image data and the identifier are acquired simultaneously. Thereby, the user can confirm that the predetermined object exists by looking at the image data, and can confirm that the identifier read simultaneously with the image data is a legitimate one attached to the object. Insist.
JP 2000-261551 A

  However, in the image authentication system described in Patent Document 1, sufficient consideration is not given to the case where there are a plurality of objects with RFID tags near the system. For example, when a plurality of objects A, B, C,... Are placed close to each other, there is a possibility that a plurality of objects are reflected in an image photographed using the camera described in Patent Document 1.

  Further, when an RFID tag of an object is read using an RF receiver (RFID reader) described in Patent Document 1, a plurality of identifiers ID_A, ID_B, ID_C, attached to a plurality of objects A, B, C,. There is a high possibility of reading.

  Further, Patent Document 1 also describes the use of a directional antenna as an RF receiver antenna, but the directional range of this directional antenna (a range in which an RFID tag can be read) cannot be controlled. Although there is no worry of reading the RFID tag placed behind the RF receiver, there is a high possibility that all of the plurality of RFID tags placed in front of the RF receiver will be read out.

  That is, when the system described in Patent Document 1 is used, an image including a plurality of objects A, B, C,... And a plurality of identifiers ID_A, ID_B, ID_C,. It is impossible to know which object that is reflected corresponds to which identifier. Furthermore, although there are m objects (m is 1 or more) reflected in the image, the read identifier may be n (n is m or more). It becomes more difficult to associate a plurality of identifiers with each other.

  The present invention has been made in view of the above-described problems. When an RFID tag attached to an object is read when an object is imaged, an imaging parameter and an RFID reading parameter are set. An object is to match the photographing range and the RFID reading range by performing interlock control.

  In addition, the shooting parameters and the RFID reading parameters are linked and controlled so that the number of objects reflected in the captured image or the number of read identifiers is one, so that only one object is always captured and RFIDd. The purpose is to read tags.

  Further, only when a part or all of the read identifiers matches a predetermined identifier, the composite data composed of the image data and the identifier is stored, so that only a predetermined object is found, and the discovery time and location are matched. It is intended to be useful for tracking and managing objects by memorizing them.

  The present invention is an object information acquisition apparatus having an imaging means for imaging an object and a reading means for reading information from an RF tag attached to the object, wherein the object is captured by the imaging means. Control means for controlling the photographing parameters of the photographing means and the reading parameters of the reading means so as to make the photographing range for photographing coincide with the reading range for reading the information of the RF tag by the reading means; And generating means for generating composite data combining the read image data of the object and the read information.

  In addition, the present invention is an object authentication apparatus having an imaging unit for imaging an object and a reading unit that reads an identifier from an RF tag attached to the object. On the other hand, storage means for storing composite data in which an image feature amount and a unique identifier are combined, an imaging range when the object is imaged by the imaging means, and a reading range when the identifier of the RF tag is read by the reading means In order to match the image capturing parameter of the image capturing unit and the reading parameter of the reading unit, an extracting unit for extracting an image feature amount from captured image data, and the extracted image feature amount Authentication means for authenticating the object by comparing composite data combining the read identifier with the composite data stored in the storage means; Characterized in that it has.

  According to the present invention, reading of RFID tags other than the object to be photographed can be prevented.

  The best mode for carrying out the invention will be described below in detail with reference to the drawings. In the embodiment, a passive RFID tag using a radio frequency identification (RFID) technology is attached to an object, and an external device having an RFID reading function reads the information of the RFID tag. A case where authentication is performed will be described.

  In the first embodiment, as an external apparatus, an object information acquisition apparatus will be described as an example in which an object is photographed by a camera function and at the same time information (identifier) of an RFID tag attached to the object is read by an RFID reading function.

  FIG. 1 is a block diagram illustrating an example of the configuration of the object information acquisition apparatus according to the first embodiment. As shown in FIG. 1, the object information acquisition apparatus 100 includes an image capturing unit 110, an RFID reading unit 120, a parameter control unit 130, a composite data generation unit 140, an operation unit 150, a display unit 160, and a storage unit 170. Contains components. Hereinafter, details of each component will be described in order.

  The image photographing unit 110 includes a predetermined zoom mechanism 111 and can control a zoom magnification or a viewing angle and a focal length (focus). Preferably, the image photographing unit 110 is provided with a pan / tilt mechanism (not shown) so that the photographing direction can be changed in the left and right and up and down directions.

  The RFID reading unit 120 includes a directional antenna 121 for wireless communication only with an RFID tag in a specific direction, and a range in which radio waves emitted from the directional antenna 121 spread (hereinafter referred to as an antenna directivity range). It is possible to control the output level (radiation intensity or reception sensitivity of electromagnetic waves) of the antenna that affects the reach of radio waves.

  The parameter control unit 130 controls the shooting parameters of the image shooting unit 110 and the RFID reading parameters of the RFID reading unit 120 in conjunction with each other in accordance with an instruction from the user input from the operation unit 150. This interlocking control method will be further described later with reference to FIGS. Note that an instruction from the user is not necessarily required, and the parameter control unit 130 can automatically perform parameter interlocking control by determining a control rule in advance.

  The composite data generation unit 140 receives the image data captured from the image capturing unit 110 and receives the identifier of the RFID tag read from the RFID reading unit 120. Thereafter, the image data and the identifier are combined by a predetermined method to generate composite data. At the time of generation, predetermined conversion may be performed on the composite data such as encryption and data compression.

  The display unit 160 receives the image data and the identifier from the composite data generation unit 140, and displays these data to the user by a method suitable for the data.

  That is, the image data is displayed as a bitmap, and the identifier is displayed as a character or converted into an icon or graph using a predetermined correspondence table and displayed as a bitmap.

  In addition, when the object information acquisition apparatus 100 is automatically controlled or remotely controlled, there may be a configuration in which the display unit 160 is not included like the operation unit 150.

  The storage unit 170 stores the composite data received from the composite data generation unit 140 in a storage medium. Various media such as RAM, flash ROM, hard disk, memory card, USB memory, magnetic tape, optical disk, magnetic disk, and various DVD disks can be used as the storage medium.

  FIG. 2 is a diagram illustrating a configuration example of the directional antenna 121 capable of controlling the antenna characteristics. As shown in FIG. 2, the directional antenna 121 includes a patch array antenna 122 in which a large number of patch antennas 123 are arranged in an array. The patch antennas 123 are shown as small squares and are arranged in a total of 256 elements of horizontal 16 × vertical 16. However, the number of elements can be arbitrarily increased or decreased to some extent, affecting the characteristics of the antenna.

  Note that not only the patch array antenna 122 but also an array antenna can generally achieve sharper directivity as the number of elements is increased. Further, the optimum values of the element size and the arrangement interval of elements are determined by the carrier frequency of radio waves transmitted and received by the antenna.

  In the patch array antenna 122 according to the present embodiment, there is an electrical switch (not shown) between each element and the feeder line so that power can be supplied only to an element within a certain range from the center of the antenna. The electrical switch can be realized by a transistor, a micro electro-mechanical system (MEMS) switch, or the like. The power supply range 124 indicates a range that surrounds only the elements that are supplied with power.

  FIG. 3 is a diagram illustrating a specific example of a correspondence relationship between the zooming magnification of shooting, which is a part of the shooting parameters, and the feeding range of the antenna, which is a part of the RFID reading parameter. The shooting range when the zoom magnification of shooting is changed can be automatically measured by a person viewing the shot image or by image processing. Further, the sharpness of the directivity (directivity range) of the radio wave when the feeding range in the X and Y directions of the antenna is changed can be calculated by measuring the received radio wave intensity at many points in the anechoic chamber.

  In this way, by measuring each range in advance, it is possible to select a plurality of correspondences between the shooting zoom magnification and the feeding range of the antenna so that the shooting range and the directivity range of the radio wave substantially match, The correspondence as illustrated in FIG. 3 is obtained.

  Note that the numerical values shown in each column of the feeding range of the antenna in the X and Y directions correspond to the X and Y coordinates shown in FIG. 2, and the numerical values when the arrangement interval of the patch antennas 123 is “1”. It is.

  FIG. 4 is a diagram illustrating a specific example of a correspondence relationship between the focal length (F value) of imaging, which is a part of imaging parameters, and the output level of an antenna, which is a part of RFID reading parameters. The radio wave arrival distance when the output level of the antenna is changed can be calculated by measuring the received radio wave intensity at many points within the antenna directivity range in the anechoic chamber.

  Therefore, by selecting the output level of the antenna so that the focal length (F value) of photographing matches the radio wave arrival distance of the antenna, the correspondence relationship illustrated in FIG. 4 can be obtained.

  Note that the numerical values in each column shown in FIG. 3 and FIG. 4 are examples, and differ depending on the component configuration, structure, manufacturing method, and the like of the object information acquisition apparatus 100. It is preferable to create different correspondences based on the results.

  In the above configuration, the parameter control unit 130 controls the image capturing unit 110 so that the image capturing range 11 in which the image capturing unit 110 captures an image and the RFID reading range 12 in which the RFID reading unit 120 reads the RFID tag are substantially the same range. And the RFID reading unit 120 are interlocked and controlled, so that only one object B can be included in the imaging range 11 and the RFID reading range 12.

  Here, the control executed by the parameter control unit 130 when reading the identifier of the RFID tag attached to the object at the same time that the object information acquisition apparatus 100 captures the desired object will be described. In addition, the case where the object B shown in FIG. 1 is imaged as a desired object will be described as an example.

  FIG. 5 is a flowchart illustrating a control procedure of the parameter control unit 130 according to the first embodiment. First, in step S501, the parameter control unit 130 instructs the image photographing unit 110 to photograph the object B. Accordingly, the image photographing unit 110 adjusts the zoom magnification and the focal length of the zoom mechanism 111 so that the photographing range becomes the photographing range 11 of the object B, and photographs only the object B.

  Next, in step S502, the parameter control unit 130 inputs the zoom magnification and the focal length from the image photographing unit 110 as photographing parameters, and based on the photographing parameters, the photographing range 11 and the RFID reading range 12 are substantially the same range. The reading parameters of the RFID reading unit 120 are determined so that

  Specifically, if the shooting zoom magnification is 1.5, the power supply ranges in the X and Y directions are within ± 5 based on the correspondence between the zoom magnification shown in FIG. 3 and the power supply range of the antenna (shown in FIG. 2). If the focal length of imaging is 4.3, the output level is determined to be 90% from the correspondence between the focal length and the antenna output level shown in FIG.

  In step S503, the RFID reading unit 120 is instructed to determine the power supply range and output level. Thereby, the RFID reading unit 120 controls the directional antenna 121 according to the power supply range and the output level, and reads the identifier of the RFID tag attached to the object B in the RFID reading range 12.

  In this way, the composite data generation unit 140 receives the image data obtained by capturing only the object B and the identifier read from the RFID tag attached to the object B, and the composite data generation unit 140 receives the image data and Composite data can be generated from the identifier and displayed on the display unit 160 or stored in the storage unit 170.

  That is, the composite data generation unit 140 can improve the utility value of the composite data by generating the composite data only when there is only one object and when there is only one identifier. It should be noted that when a plurality of objects are shown, it is possible to perform control so that photographing is performed again.

  Further, it is determined whether or not a part or all of the identifiers read by the identifier determination unit (not shown) by the composite data generation unit 140 matches a predetermined identifier. Only when it is determined to match, the image data and the identifier are used. By storing the composite data to be stored in the storage unit 170, only a predetermined object can be found.

  Further, by storing the discovery time and discovery location of a predetermined identifier in the storage unit 170 together with the composite data, it can be used for tracking the object and managing the storage location.

  Here, the discovery time of the predetermined identifier is acquired by using a system timer (not shown). In addition, the location where the predetermined identifier is found is that the installation location of the object information acquisition apparatus is previously input by the user from the operation unit 150 and stored in the storage unit 170, or a position measurement such as GPS (Global Positioning System) is performed. It shall be obtained by using the system.

  Next, Embodiment 2 according to the present invention will be described in detail with reference to the drawings. In the second embodiment, as an external device, an object authentication device that captures an object by a camera function and simultaneously reads information (identifier) of an RFID tag attached to the object by an RFID reading function and authenticates the object. Explained.

  FIG. 6 is a block diagram illustrating an example of the configuration of the object authentication device according to the second embodiment. In FIG. 6, the same components as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted. Here, components different from those in FIG. 1 will be described.

  As shown in FIG. 6, in the object authentication device 200 of the second embodiment, an image feature amount extraction unit 210, a composite data storage unit 220, and an authentication unit 230 are newly added.

  After receiving the image data taken from the image photographing unit 110, the image feature amount extracting unit 210 automatically extracts image feature amounts such as the shape and color of the object being reflected using a predetermined image processing algorithm. To do.

  The composite data generation unit 140 receives the image feature amount extracted from the image feature amount extraction unit 210 and receives the identifier of the RFID tag read from the RFID reading unit 120. Thereafter, the image feature quantity and the identifier are combined by a predetermined method to generate composite data.

  The composite data storage unit 220 stores a list of composite data including image feature amounts and identifiers obtained from various objects in advance.

  In other words, composite data is obtained by capturing images in advance for each of various objects, extracting image feature amounts, simultaneously reading identifiers from RFID tags, and combining the extracted image feature amounts and the read identifiers. Is created and the list is stored.

  The authentication unit 230 authenticates the object by comparing the composite data received from the composite data generation unit 140 with a list of composite data stored in the composite data storage unit 220. Since this authentication is performed in two stages, i.e., identifier verification and image feature amount verification, compared to conventional authentication using only RFID technology or authentication using only a face image or fingerprint image using biometric technology. The reliability is greatly increased.

  In the above configuration, the parameter control unit 130 controls the image capturing unit 110 so that the image capturing range 11 in which the image capturing unit 110 captures an image and the RFID reading range 12 in which the RFID reading unit 120 reads the RFID tag are substantially the same range. And the RFID reader 120 are controlled in conjunction with each other. After the image feature amount extraction unit 210 receives the image data captured from the image capturing unit 110, the image feature amount such as the shape and color of the object is automatically extracted using a predetermined image processing algorithm. Then, the composite data generation unit 140 generates composite data by combining the image feature amount from the image feature amount extraction unit 210 and the identifier of the RFID tag from the RFID reading unit 120 by a predetermined method. Then, the authentication unit 230 authenticates the object by comparing the composite data received from the composite data generation unit 140 with a list of composite data stored in the composite data storage unit 220, and the authentication result (authentication success or authentication). Failure) is displayed on the display unit 160.

  As a result, the composite data generation unit 140 generates composite data only when there is only one target object and when there is only one identifier, and the authentication unit 230 recognizes the target object. Can be improved.

  Even if the present invention is applied to a system composed of a plurality of devices (for example, a host computer, an interface device, a reader, a printer, etc.), it is applied to an apparatus (for example, a copier, a facsimile machine, etc.) composed of a single device. It may be applied.

  Another object of the present invention is to supply a recording medium in which a program code of software realizing the functions of the above-described embodiments is recorded to a system or apparatus, and the computer (CPU or MPU) of the system or apparatus stores it in the recording medium. Needless to say, this can also be achieved by reading and executing the programmed program code.

  In this case, the program code itself read from the recording medium realizes the functions of the above-described embodiment, and the recording medium storing the program code constitutes the present invention.

  As a recording medium for supplying the program code, for example, a floppy (registered trademark) disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like is used. be able to.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (operating system) operating on the computer based on the instruction of the program code. It goes without saying that a case where the function of the above-described embodiment is realized by performing part or all of the actual processing and the processing is included.

  Further, after the program code read from the recording medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. It goes without saying that the CPU or the like provided in the board or the function expansion unit performs part or all of the actual processing and the functions of the above-described embodiments are realized by the processing.

It is a block diagram which shows an example of a structure of the target object information acquisition apparatus in Example 1. FIG. It is a figure which shows the structural example of the directional antenna 121 which can control the characteristic of an antenna. It is a figure which shows the specific example of the correspondence of the zoom magnification of imaging | photography which is a part of imaging | photography parameter, and the feeding range of the antenna which is a part of RFID reading parameter. It is a figure which shows the specific example of the correspondence of the focal distance (F value) of imaging | photography which is a part of imaging | photography parameter, and the output level of the antenna which is a part of RFID reading parameter. 3 is a flowchart illustrating a control procedure of a parameter control unit 130 according to the first embodiment. It is a block diagram which shows an example of a structure of the target object authentication apparatus in Example 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Image | photographing range 12 RFID reading range 100 Object information acquisition apparatus 110 Image photographing part 111 Zoom mechanism 120 RFID reading part 121 Directional antenna 122 Patch array antenna 123 Patch antenna (one element)
124 power supply range 130 parameter control unit 140 composite data generation unit 150 operation unit 160 display unit 170 storage unit 200 object authentication device 210 image feature amount extraction unit 220 composite data storage unit 230 authentication unit

Claims (15)

An object information acquisition apparatus having an imaging unit for imaging an object and a reading unit that reads information from an RF tag attached to the object,
An imaging parameter of the imaging unit and a reading parameter of the reading unit are set so that the imaging range when the object is imaged by the imaging unit and the reading range when the information of the RF tag is read by the reading unit are matched. Control means for controlling;
An object information acquisition apparatus comprising: generation means for generating composite data combining image data of a photographed object and the read information. The reading means has a directional antenna capable of receiving with high sensitivity electromagnetic waves coming from a direction within a certain angular range (directing range) centered on the line-of-sight direction of the photographing means,
The directivity range of the directional antenna can be controlled as the reading parameter, and the viewing angle or the zoom rate can be controlled as the imaging parameter.
The target information acquisition apparatus according to claim 1, wherein the control unit controls a directivity range of the directional antenna in conjunction with the viewing angle or the zoom rate. The focal length can be controlled as the shooting parameter, and the antenna output of the directional antenna can be controlled as the reading parameter.
The target information acquisition apparatus according to claim 2, wherein the control unit controls the antenna output in conjunction with a focal length. The generating unit includes a determining unit that performs image processing on the image data of the photographed object to determine whether the number of objects reflected therein is one or not.
2. The object information acquisition apparatus according to claim 1, wherein the composite data is generated when it is determined that the number of objects reflected by the determination unit is one. The generation unit includes a determination unit that determines whether the read information is information from the object;
The object information acquisition apparatus according to claim 1, wherein the composite data is generated when the determination unit determines that the information is information from the object. Determination means for determining whether or not the read information matches predetermined information;
The object information acquisition apparatus according to claim 1, wherein the composite data is generated when the read information matches predetermined information.   The object information acquisition apparatus according to claim 1, further comprising a storage unit that stores the composite data together with other information when the composite data is generated.   The object information acquisition apparatus according to claim 7, wherein the other information is at least one of information indicating a generation time of the composite data, an identifier of the apparatus, or an installation location. An object authentication apparatus having an imaging unit for imaging an object and a reading unit that reads an identifier from an RF tag attached to the object,
Storage means for storing composite data combining image features and unique identifiers for a plurality of objects in advance;
An imaging parameter of the imaging unit and a reading parameter of the reading unit are set so that the imaging range when the object is imaged by the imaging unit and the reading range when the identifier of the RF tag is read by the reading unit are matched. Control means for controlling;
Extraction means for extracting image feature values from the captured image data;
And an authentication unit that authenticates the object by comparing composite data obtained by combining the extracted image feature quantity and the read identifier with the composite data stored in the storage unit. Product authentication device. The reading means has a directional antenna capable of receiving with high sensitivity electromagnetic waves coming from a direction within a certain angular range (directing range) centered on the line-of-sight direction of the photographing means,
The directivity range of the directional antenna can be controlled as the reading parameter, and the viewing angle or the zoom rate can be controlled as the imaging parameter.
The object authentication apparatus according to claim 9, wherein the control unit controls a directivity range of the directional antenna in conjunction with the viewing angle or the zoom rate. The focal length can be controlled as the shooting parameter, and the antenna output of the directional antenna can be controlled as the reading parameter.
The object authentication apparatus according to claim 9, wherein the control unit controls an antenna output in conjunction with a focal length. The authentication unit includes a determination unit that determines whether or not the number of objects reflected in the image data of the photographed object is one by performing image processing on the image data;
The object authentication apparatus according to claim 9, wherein the object is authenticated when it is determined that the number of objects reflected by the determination unit is one. The authentication unit includes a determination unit that determines whether the read identifier is an identifier from the object,
The object authentication apparatus according to claim 9, wherein the object is authenticated when the determination unit determines that the identifier is an identifier from the object. A method for controlling an object information acquisition apparatus, comprising: an imaging unit for imaging an object; and a reading unit that reads information from an RF tag attached to the object,
An imaging parameter of the imaging unit and a reading parameter of the reading unit are set so that the imaging range when the object is imaged by the imaging unit and the reading range when the information of the RF tag is read by the reading unit are matched. A control process to control;
A control method for an object information acquiring apparatus, comprising: a generation step of generating composite data combining image data of a photographed object and read information. An image capturing means for capturing an object, a reading means for reading an identifier from an RF tag attached to the object, and composite data combining image feature amounts and unique identifiers for a plurality of objects in advance. A method for controlling an object authentication device having storage means for storing,
An imaging parameter of the imaging unit and a reading parameter of the reading unit are set so that the imaging range when the object is imaged by the imaging unit and the reading range when the identifier of the RF tag is read by the reading unit are matched. A control process to control;
An extraction step of extracting image feature values from the captured image data;
And an authentication step of authenticating the object by comparing composite data obtained by combining the extracted image feature quantity and the read identifier with composite data stored in the storage means. Control method for object authentication device.

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