JP2002281275A - Certification photograph and individual authentication medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive certification photograph which has high security and which is easily treated and to provide an individual authentication medium to which the certification photograph is stuck. SOLUTION: A photograph picture 4 which is printed in a first area 3 on a printing medium 2 and is based on the photograph of a person to be photographed and an encoded picture 6 which is printed in a second area 5 on the printing medium 2, is generated by encoding the photograph picture 4, whose content cannot be recognized by eyes and which can be restored into the photograph picture 4 are arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an identification photograph attached to a driver's license, a passport, an ID card, and the like, and a personal authentication medium to which the identification photograph is attached.

[0002]

2. Description of the Related Art Conventionally, before applying for the issuance of a personal authentication medium such as a driver's license, a passport, an ID card, etc. to a responsible organization, it is necessary to prepare an identification photograph to be attached to the personal authentication medium. In order to obtain the ID photo, a visit to a photo studio several days before the application is made and a photograph is taken, or a photograph is taken by an automatic photographing device.

[0003] However, since the conventional ID photograph is obtained by photographing only a face image of a person, it is possible to easily forge a driver's license or a passport by replacing the pasted ID photograph. There is. This is because, in the case of conventional ID photos, the identity of the driver's license or passport bearer's face can be determined by comparing the face image of the ID photo affixed to the driver's license or passport. However, this is because it is not possible to authenticate that personal information such as an address, a name, an age, and the like described in a driver's license or a passport is information relating to the bearer, with an identification photograph including only a face image.

[0004]

Therefore, a photographic image and
In order to associate the driver's license or passport with personal information described in the passport, the photograph submitted to the responsible organization for the driver's license or passport is converted into digital data by a scanner etc. There is a method in which registration is made in a computer system, and authentication is performed by reading from a database as necessary.

However, in this database system, every time it becomes necessary to authenticate a driver's license or an identification photograph affixed to a passport, the database is accessed to obtain information, and the obtained information and the registered information are registered in the database. A procedure to match the existing photo image,
There is a problem that it takes time to access the database. In addition, this database method requires a large-scale computer system to build a database to handle image data, and photographic image data has a larger data capacity than personal information mainly composed of text information. There is a problem that when a trouble occurs in a part of the system, the collation cannot be performed, and the whole system is greatly affected.

Further, as a method of printing a certificate photograph to be attached to a driver's license, a passport, an ID card, or the like, a silver halide photograph has been generally used in the past, but in recent years, a sublimation type printer or an ink jet type printer has been used. Since the gradation has been improved, printing by these printers has become widespread instead of silver halide photography. However, sublimation printers are suitable for printing landscapes, portraits, etc.
Even if it is attempted to form minute dots, it is difficult to form a minute pattern composed of dots of several tens of microns to 100 microns with good contrast due to the spread of ink. In addition, as with the sublimation type printer, it is difficult to form a fine pattern in the ink jet type printer,
There is a problem that ordinary inks are susceptible to water wetting and that the image tends to deteriorate over time.

In addition to these, thermal paper printers and thermal transfer printers are widely used as printers for printing fine patterns such as two-dimensional codes with good contrast. However, the thermal paper type printer has a problem that the paper is limited to special paper and is not suitable for long-term storage. In addition, thermal transfer type printers
It is known that a fine pattern can be formed with a high resolution of about 00 dpi, but it is difficult to obtain a higher resolution due to a structural limitation of the print head. Further, the thermal transfer printer is not suitable for printing an image requiring high gradation such as a landscape or a person image.

On the other hand, there is an ID card as a personal authentication medium having high security. With this ID card,
For example, a method has been adopted in which an ID photo is attached to a card base material, and the photographic image is digitally converted and printed as a two-dimensional code on the card base material at a place different from the place where the ID photo is attached.

However, in the case of this ID card system, the ID
Although security is maintained for the entire card, it is difficult to apply it to a driver's license, passport, or the like, like a general-purpose ID photo. Also, when creating an ID card,
The personal data must be provided to the creator of the ID card or the like, and the personal data may be leaked to another person due to the carelessness of the person in charge. In a device for printing a face image and a two-dimensional code, such as an ID card creation system,
It is necessary to print separately using two types of printers, such as using a silver halide photograph, a sublimation type printer, an ink jet printer, etc. to print a face image, and using a thermal transfer printer to print a two-dimensional code. However, there is a problem that the printing process is complicated and expensive.

In view of the above circumstances, it is an object of the present invention to provide an inexpensive ID photograph having high security and easy handling, and a personal authentication medium to which the ID photograph is attached.

[0011]

According to an aspect of the present invention, there is provided an identification photograph for achieving the above object, comprising: a photographic image based on a photograph of a subject printed on a predetermined first area on a print medium; A coded image generated by coding the photographic image printed on a predetermined second area of which the content is not visually recognizable and can be restored to the photographic image And an image.

Here, the coded image includes, in the photographic image, personal information specific to the individual to be photographed for identifying the person to be photographed, and condition information on photographing conditions at the time of photographing the photograph. It is preferably generated by coding by adding at least one piece of information among them.

It is preferable that the coded image is printed as one or a plurality of two-dimensional codes.

In a preferred embodiment, the coded image is generated by coding the photographic image information and then coding the photographic image information.

The coded image may include, for all or a part of the coded image, an encryption key set by a photographer of the photograph, an encryption key set by a photographer of the photograph, and the code It is also a preferable embodiment that the key is encrypted with at least one of the encryption keys set at the time of encryption.

It is also preferable that the coded image is printed as a visually recognizable image at a position that does not hinder recognition of the photographic image printed in the first area. One.

The coded image is printed on the photographic image by a color material which is transparent to visible light and is recognizable by irradiation with infrared light or ultraviolet light. Is also a preferred embodiment.

In a preferred embodiment, the coded image is generated by adding a unique characteristic value obtained by performing predetermined arithmetic processing to the coded image and coding the coded image. One.

The personal authentication medium of the present invention that achieves the above object is a personal authentication medium used for personal authentication in which personal information for identifying an individual is written on a print medium. Printed in the first area of
A photographic image based on the personal photograph and a photographic image printed on a predetermined second area on a print medium, generated by encoding the photographic image, the contents cannot be visually recognized. And an identification photograph having a coded image which can be restored to the photographic image.

[0020]

Embodiments of the present invention will be described below.

FIG. 1 is a view showing a first embodiment of the ID photograph of the present invention.

As shown in FIG. 1, an ID photograph 1 according to the first embodiment is printed on a first area 3 on a print medium 2.
The photographic image 4 based on the photograph of the subject and the photographic image 4 printed on the second area 5 on the print medium 2, generated by encoding the photographic image 4, cannot be visually recognized. And a coded image 6 that can be restored to a photographic image 4.

The coded image 6 includes, in the photographic image 4, at least one of personal information unique to the individual to be photographed for identifying the person to be photographed, and condition information relating to photographing conditions at the time of photographing. This coded image 6 is generated by adding and coding one or more pieces of information.
Are six two-dimensional code images 6a, 6b, 6c, 6d,
6e and 6f are printed. The coded image 6 may be coded to further include other information, for example, classification information indicating that the photograph is an ID photograph.

In the first embodiment, Q is defined as a two-dimensional code in accordance with the basic specification defined in JISX0510.
R code is used.

FIG. 2 is a diagram showing an example of a QR code used as a two-dimensional code in the first embodiment.

As shown in FIG. 2, this QR code 7 is
It is configured by arranging black and white cells in a matrix, and includes cutout symbols arranged at three corners, timing patterns, and alignment patterns together with coded data.

The QR code 7 (coded image) does not hinder recognition of the photographic image 4 printed on the first area 3 in the ID photograph 1 (see FIG. 1) of the first embodiment. 2 is explicitly printed as an image that can be visually recognized.

Next, a description will be given of an identification photograph creating apparatus for creating an identification photograph according to the first embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of an identification photograph creating apparatus for creating an identification photograph of the present invention.

The ID photo creation device 100 includes a camera 102 for photographing the face of a subject 101 and a camera 10
And a control unit 110 that processes the photographed image while controlling the control unit 2 and the control unit 1 that is controlled by the control unit 110.
The printer 103 includes a printer 103 that performs printing based on the image signal output from the digital camera 10, an input unit 104 for inputting personal information about a subject, and a display unit 105 that displays the input information.

FIG. 4 is a block diagram showing the function of each part of the ID photograph creating apparatus shown in FIG.

A face image signal photographed by the camera 102 is converted into digital information by an image input unit 111 in the control unit 110. The digital information is subjected to image processing for printing a face image by the image processing unit 112 and then output to the printer control unit 113 as a face image signal. At the same time, the digital information obtained by the digital conversion by the image input
After being subjected to compression processing in step 4, the data is input to the encoding unit 116. In addition, personal information of the subject input by the subject from the input unit 104, and shooting condition information such as a shooting date and time created by the internal data unit 115 and a serial number specifying the ID photo creation device that has taken the image, And character information such as classification information indicating that the photograph is an identification photograph is input to the encoding unit 116.

The information input to the encoding unit 116 is
After being encrypted by an encryption key provided in the internal data unit 115 in advance and converted into a plurality of divided two-dimensional codes, it is output to the printer control unit 113 as a two-dimensional code image.

In the printer control unit 113, based on the input face image signal and two-dimensional code image signal, in accordance with the format set in the ID photo creating apparatus, the first ID photo on the print medium 2 (see FIG. 1) is printed. The printer 103 is controlled to print a face image in the area 3 and a two-dimensional code image in the second area 5, respectively.

Here, among the two-dimensional code images 6a, 6b, 6c, 6d, 6e, 6f (see FIG. 1) divided into a plurality of parts, the two-dimensional code images are first read by an after-mentioned ID photograph reading apparatus (see FIG. 7). The two-dimensional code image may not be encrypted with the encryption key, and may be a header portion including classification information for obtaining an encryption key that can be decrypted without the encryption key. Therefore, 2D other than the 2D code image serving as the header
The dimensional code image may be individually encrypted with different encryption keys, or may be divided into a plurality of pieces after being encrypted with one encryption key.

Without dividing the two-dimensional code image into a plurality,
When printing only one, as shown below, ID photo 1
In, the two-dimensional code 3 may be arranged at a position that does not hinder the recognition of the face image 2.

FIG. 5 is a view showing a second embodiment of the ID photograph of the present invention.

As shown in FIG. 5, the ID photograph 31 of the second embodiment includes a photographic image 34 based on a photograph of a subject, which is printed in a first area 33 on a print medium 32, and a print image 34. Generated by encoding the photographic image 34 printed on the second area 35 on the medium 32, the contents cannot be visually recognized, and the photographic image 34 can be restored. In this example, only one coded image 36 is printed.

In this case, the two-dimensional code is entirely encrypted, or only a part of the data is encrypted and coded together with the data of the non-encrypted part, and the encrypted part is extracted at the time of decryption. To decrypt. Also, of the personal information input by the subject, the name and address described in the ordinary personal authentication medium, the date of birth, telephone number, hometown, Contact information, parents' names, educational background, school or work name, school or work address, home address, nationality, Internet e-mail address, medical history, comments, and other personal information associated with the subject , Fingerprint, palm print, iris, ear print, lips,
Signatures, other personal image information obtained from the subject,
It may be a combination of one or more of voiceprint or other personal voice information obtained from the subject, blood type, DNA, and other personal biometric information related to the living body of the subject.

For information that cannot be easily known by a third party, the subject may perform an encryption process with a password set.

The personal information such as the personal information, the personal voice information, and the personal biometric information is stored in a dedicated ID.
What is necessary is just to read the data recorded on the card by the ID photo reader, or to register it in a dedicated database in advance, and to obtain the data by accessing the database from the ID photo generator.

In the case of fingerprints, palm prints, irises, etc., an image reading device is provided in the ID photo creation device, in the case of voice prints, a voice recognition device is provided, and in the case of signatures, a pen-side input device is provided. It is also possible to create information.

In the present embodiment, examples of the photographing date and time and the serial number for specifying the ID photographing apparatus have been given as examples of the condition information at the time of photographing.
The information may be one or a combination of a plurality of pieces of character information associated with shooting conditions such as humidity, air pressure, weather, and location. It is desirable that such information be written into digital information without being arbitrarily changed by the subject.

Next, a third embodiment of the ID photograph of the present invention will be described.

FIG. 6 is a view showing a third embodiment of the ID photograph of the present invention.

As shown in FIG. 6, in the ID photograph 11 of the third embodiment, the coded image 16 is coded as one two-dimensional code, is transparent to visible light,
In addition, it is printed on the photographic image 14 with a color material recognizable by irradiation of infrared light or ultraviolet light.

The identification photograph of the third embodiment is created by the identification photograph creating apparatus 100 shown in FIG. 3, as in the first and second embodiments. In addition, the flow of the identification photograph creation is the same as that shown in the first embodiment. However, in the ID photograph 11 of the third embodiment, the two-dimensional code 16 is printed as a single two-dimensional code. At this time, the two-dimensional code is encrypted using an encryption key provided in advance in the internal data unit 115 (see FIG. 4), but classification information indicating that the two-dimensional code can be decrypted without the encryption key, information that can be decrypted with the encryption key Alternatively, a two-dimensional code format may be set as information that can be decrypted with a password set by the subject. As a result, information can be handled in the same manner as when the two-dimensional code is divided into a plurality of pieces (see FIG. 1).

When printing the two-dimensional code 16,
Instead of the toner or ink used for printing the photographic image 14, a toner or ink that absorbs infrared rays is used. In this case, a conventional printer is added with an additional system for printing infrared absorbing material. However, in the case of the electrophotographic system, it is only necessary to add an infrared absorbing toner and its exposing / developing system to the respective exposure / developing systems of the YMCK toner. What is necessary is just to add an ink donor film and its exposure / development system.

When the two-dimensional code 16 is read, similarly to the first embodiment, an ID photo reader (FIG. 7)
). The processing method is the same as in the first and second embodiments. However, in this case, reading is performed by irradiating infrared light in a wavelength band that is absorbed by the toner or ink instead of ordinary visible light. With such an infrared absorbing material, 2
When a two-dimensional code is formed, it is not possible to recognize that the two-dimensional code is printed on the face image unless the absorption wavelength band is specified, so that the security is improved as compared with the visualized two-dimensional code. .

Further, this two-dimensional code is used for identification photograph 11
In the case of a coded image having the same capacity as that of a coded image that can be visually recognized, the cell of the two-dimensional code can be made larger to improve the reading reliability. Can be.

When the cell size is the same as that of a visually recognizable coded image, there is an advantage that the capacity of the two-dimensional code can be increased. Therefore, when embedding a large amount of information in the same area is the first object, a single or a small number of two-dimensional codes are used, and when reliability of reading is the first object, It is preferable to arrange two-dimensional codes as necessary, such as printing the same two-dimensional code a plurality of times. Although the infrared absorbing material is described here, the same effect as the infrared absorbing material can be obtained when an ultraviolet absorbing material is used.

In each of the embodiments described above, PDF417, data matrix, Q
A general-purpose code such as an R code can be used, or another two-dimensional code may be used.

Next, a description will be given of an identification photograph reading apparatus used for reading an identification photograph created by the above identification photograph creating apparatus and performing personal authentication.

FIG. 7 is a schematic configuration diagram of an embodiment of an identification photograph reading apparatus for reading an identification photograph according to the present invention.

As shown in FIG. 7, the ID photo reader 200 includes a two-dimensional code reader 201 for reading a photographic image and a two-dimensional code image on the ID photo 1 and information read by the two-dimensional code reader 201. It comprises an image processing unit 202 for processing and converting into image information and character information according to a predetermined format, and a display unit 203 for displaying the image information and character information on the screen.

The two-dimensional code images sequentially read by the two-dimensional code reader 201 are decrypted using a predetermined encryption key, and are separated into a reproduced face image 204 and reproduced character information 205 by the image processing unit 202. Each is displayed on the display unit 203 according to the format set in the ID photo reader.

Reproduced face image 2 displayed on display unit 203
Reference numeral 04 denotes the image created by compressing the face image 4 printed on the identification photograph 1, but it can be recognized that the image is created based on the face image 2 printed on the identification photograph 1. By performing compression at a compression ratio of the order, the reproduced face image 204 displayed on the display unit 203, the face image 4 printed on the ID photo 1, and the face of the holder of the ID photo are compared. Accordingly, it is possible to determine whether or not the holder of the identification photograph is the same as the person of the identification photograph.

Here, among the two-dimensional code images divided into a plurality of parts, the two-dimensional code image read first is described in a certificate photograph for obtaining an encryption key that can be decrypted without an encryption key. In the case of a header portion including an ID number, an encryption key may be obtained from the read classification information by using a conversion table set in the ID photo reader, and may be used for decryption of the read two-dimensional code. Good.

For information encrypted by the subject's password setting, if it is necessary to confirm that the holder of the ID photo is the same person as the subject, the password is sent from the holder. May be input by the operator in charge through the password input unit 204, or the information may be read and confirmed by having the holder input through the password input unit 204.

Next, the personal authentication medium of the present invention will be described.

FIG. 8 is a diagram showing an embodiment of the personal authentication medium of the present invention.

The personal authentication medium 20 is a medium used for personal authentication in which personal information for specifying the individual is described on the print medium 26.

As shown in FIG. 8, a personal authentication medium 20 according to the present embodiment includes a photographic image 22 based on a personal photograph printed on a first area 21 on a print medium 26 and a print medium 2.
6, a code generated by encoding the photographic image 22 printed on the second area 23, the contents of which are not visually recognizable and can be restored to the photographic image 22. The identification photograph 25 having the image 24 is attached.

Next, a proof of the present invention in which the coded image 24 is generated by coding the coded image 24 with a unique characteristic value obtained by performing a predetermined arithmetic processing on the coded image 24 is encoded. A fourth embodiment of the photograph will be described.

In the identification photograph of the fourth embodiment, FIG.
Alternatively, when the ID photos 1 and 11 shown in FIG. 6 are used for a personal authentication medium such as a driver's license, a passport, an ID card, etc., the two-dimensional code image 4 printed on the ID photo 1 attached to the personal authentication medium. 14 is converted into a characteristic value associated with the two-dimensional code by performing a predetermined operation or conversion process in an institution using the same, in advance of applying for an inquiring system such as a driver's license, a passport, an ID card, etc. Register in the database. By doing so, it is possible to further improve security by confirming whether or not the ID photos 1 and 11 are registered in the database in each inquiry system.

Alternatively, as shown in FIG.
7 is written on the personal authentication medium 20 such as a driver's license, a passport, an ID card, etc. together with the personal information 28 to be written on the personal authentication medium 20, so that the ID photo can be obtained without going through the above-mentioned inquiry system. It is possible to easily confirm whether or not 25 is registered in the institution.

Here, the characteristic value means that the two-dimensional code is 0
In the case where the cell indicating “1” and the cell indicating “1” are arranged in a matrix, it refers to a value obtained by performing arithmetic processing on them in a predetermined method. For example, the sum of 1 in the matrix may be converted into a number, an alphabet, or a corresponding symbol. In order to prevent a reading error, the two-dimensional code may be divided into a plurality of parts, an operation may be performed for each of the divided areas to calculate a number or an alphabet or a corresponding symbol, and these may be arranged as characteristic values. In this case, the matching may be determined based on the ratio of the read value to the inquired value or the described value.

FIG. 9 is a schematic diagram of a characteristic value creating apparatus for creating an identification photograph according to the fourth embodiment of the present invention.

As shown in FIG. 9, this characteristic value creating device 3
Reference numeral 00 denotes a camera that captures a two-dimensional code image printed on the personal authentication medium 301, and is associated with the two-dimensional code by performing a predetermined operation or conversion on the captured two-dimensional code image. A printer 303; and an input unit 304 for inputting necessary information.

FIG. 10 is a block diagram showing the function of each unit of the characteristic value creating device shown in FIG.

As shown in FIG. 10, a characteristic value generating section 310 of the characteristic value generating apparatus includes a decoding section 311 for decoding a two-dimensional code image photographed by the camera 302 and information input from the input section 304. And the decoding unit 3
An arithmetic unit 312 that performs arithmetic processing of processing based on the information decoded in 11 and a printer control unit 313 that outputs the processing result of the arithmetic unit 312 to the printer 303 are provided.

Next, advantages of using the ID photograph and the personal authentication medium of the present invention will be described.

<Comparison with Conventional ID Photo> In the ID photo of the present invention, even if an attempt is made to obtain authentication using a personal authentication medium in which only the face image portion of the ID photo is replaced with another face image, the ID photo can be obtained as shown in FIG. At the time of authentication by the ID photo reader as shown in FIG. 7, digital information of the face image is read from the coded image of the personal authentication medium, the face image is reproduced on the display screen, and printed on the ID photo. By comparing with a face image, it can be easily detected that the photograph has been replaced, and therefore, it is not possible to receive authentication by merely replacing the face image.

If a third party who is very similar to the face image on the personal authentication medium tries to use this personal authentication medium illegally, the authenticator may use the ID photo reader to reproduce the face image reproduced on the display screen. Although it is difficult to detect an unauthorized user simply by comparing the image with the face of the person carrying the personal authentication medium, the date and time of the image read from the coded image printed in a state where it cannot be visually recognized By inquiring of the place, or personal information such as a telephone number or an Internet address to the bearer, it is possible to easily determine whether the bearer of the personal authentication medium is the owner of the personal authentication medium. .

As described above, the security of the ID photo of the present invention can be greatly improved as compared with the ID photo used in the conventional personal authentication medium. <Comparison with security by database> The ID photo of the present invention can be read by reading the coded image printed on the ID photo if the ID photo reader of the present invention is installed at the authentication site. Is a so-called local system that can reproduce personal information and face images written on the personal authentication medium in a state where recognition is impossible, so that a specific communication means accesses a remote database. It is possible to authenticate whether or not the owner of the personal authentication medium is the person without need.

Further, the collation can be performed without being affected by a trouble in the communication means, the communication system, the database system, or the like. On the other hand, only when it is difficult to determine whether or not the user is an individual, it is possible to increase the accuracy of the determination by accessing the database from a location having a specific communication means. In this case as well, there is an advantage that erroneous determination due to an error in data input can be prevented by generating a collation number using data directly read from the two-dimensional code.

<Protection Against Unauthorized Reading> Further, in the identification photograph of the present invention, even if a third party other than the person on the personal identification medium obtains the personal identification medium and tries to read the information in the identification photograph, the identification photograph can be read. Information encrypted with the encryption key set by the creation device cannot be read without the encryption key. The encryption key can be known only by the maker of the certification photo creation device and the certification photo reading device and a specific registrar, and security can be further enhanced by changing the encryption key for each registrar.
Even if the encryption key is leaked, information encrypted with the password set by the subject cannot be read without the password. Also, fingerprints,
If personal information such as voiceprint, palmprint, iris, and signature is converted into a two-dimensional code, even if a third party knows this, regardless of the presence or absence of a password, the third party can obtain a fingerprint, voiceprint, or palmprint. Since it is extremely difficult to imitate an iris, a signature, or the like, this identification photograph cannot be used. Therefore, the setting of the encryption key and the password and the coding of the information unique to the individual may be performed according to the necessity of security.

<Protection Against Forgery> Further, in the ID photo of the present invention, even if the ID photo including the coded image as well as the face image is to be replaced by the ID photo creating apparatus, the ID photo is taken. By setting so that the date and time and the serial number are automatically input to the two-dimensional code, the photographing date and time and the serial number cannot be arbitrarily changed. Therefore, even if a third party obtains the personal authentication medium and attempts to create an identification photograph, the date and time of photographing after the registration date or issue date of the personal authentication medium is recorded in the coded image. Later, it becomes clear that the ID photo was replaced with an unauthorized one.

Further, even if an attempt is made to forge an ID photo on which a face image and a coded image are printed by an apparatus other than the ID photo creating apparatus, an algorithm such as a face image encoding method, a data format, an encryption method, and an encryption key is used. Can not be counterfeited without obtaining. These algorithms can only be known by the makers of the ID photo creation device and ID photo reader. Also, even if this algorithm is leaked, if the characteristic value of the coded image is used for each specific registration institution, the characteristic value described on the personal authentication medium and the two-dimensional code described in the ID photograph will be used. By comparing the calculated value with the calculated value, it can be determined whether or not the ID photo was submitted at the time of application, and the authenticity of the ID photo can be confirmed.

On the other hand, even if the user can know the algorithm for creating a photo ID and the method of calculating the characteristic value, the digital information of the face image, the personal information, It is extremely difficult to arbitrarily create the condition information of Also, by storing the coded image in the ID photo submitted at the time of application for obtaining the personal authentication medium in a database, it is possible to access this database and verify whether the owner is the person himself or herself. It is also possible. In this case, since the coded images themselves are compared, any change in the coded images can be easily detected. Furthermore, even if there is a reading error, it may be set so as to determine the authenticity from the matching rate.

It is desirable that the method of calculating the encryption key and the characteristic value of the two-dimensional code be changed at regular intervals. Information related to the date of issue is written in a header portion that can be decrypted by a normal two-dimensional code reader, and an encryption key is obtained based on the information, and the encrypted two-dimensional code is decrypted and the operation method is calculated. And calculating the characteristic values,
Damage can be reduced even when the encryption key or the method of calculating the characteristic value is leaked.

<Printing Method> As an exposure method for forming a high-definition face image and a high-definition two-dimensional code,
The present inventors have developed Japan Hardcopy 2000.
Matrix drive VC for laser printing
As described in “Method of driving SEL array”, 2
There is an exposure method for enlarging and projecting a light emitting pattern of a surface emitting laser array arranged in a dimension on a photosensitive member. In this method, a laser array in which a plurality of surface emitting laser elements are two-dimensionally arranged as a light source, a driving circuit for driving the laser array, and an optical system for forming an emission pattern of the laser array at a desired magnification are provided. A light-sensitive material disposed on the imaging surface of the optical system and a light-emitting material of the surface-emitting laser array element by detecting the amount of light of each element and controlling a drive current or a voltage or a pulse width of each surface-emitting laser element; An exposure amount control mechanism for controlling the above exposure amount and a developing device for developing a latent image formed on the photosensitive material on a printing member are used.

According to this method, the spot diameter of the laser beam on the photosensitive material is a minute spot of about 25 microns, and the spot position of the laser beam is fixed, so that accurate spot position accuracy can be maintained. It is possible, and a high-resolution exposure image can be obtained. As a method for developing such an exposure image, there are generally an electrophotographic method and a transfer method using a donor film.

In an electrophotographic printer, an electrostatic latent image is formed on a photoreceptor by an image forming apparatus using a laser, and a face image is formed on a printing member with YMCK toner based on the electrostatic latent image. The two-dimensional code forms an image on the print member with K toner. The two-dimensional code may be formed with a single color toner other than the K toner, or the two-dimensional code may be formed with a mixed color of YMCK.

In a transfer-type printer using a donor film, an image is formed on the donor film by an image forming apparatus using a laser, and the ink of the donor film is transferred onto a printing member by heat, so that electrophotography is performed. Similar to the method, a face image and a two-dimensional code are printed. Conventionally,
In a thermal transfer printer used for forming a two-dimensional code, the size of a single dot can be reduced to 60%, while the size of a fine dot of 42 microns is the limit. This is equivalent to reducing the area occupied by the two-dimensional code to 35%, assuming that the minimum cell of the two-dimensional code is formed with the same number of dots. For example, when a QR code is used as a representative two-dimensional code, 30 m
If lk bytes are printed as one two-dimensional code as a compressed data amount of a face image in an ID photo of mx 40 mm size, the area occupied by the two-dimensional code is about 14.1 m.
It occupies an area of mx 14.1 mm and one sixth of the ID photo.

On the other hand, the method of the present invention requires only about one third of this area. With such an occupied area, the two-dimensional code can be arranged in the ID photograph so as not to disturb the face image.

Further, the area occupied by the two-dimensional code can be reduced by changing the element interval on the surface emitting laser array or the magnification of the optical system to narrow the spot interval of the laser beam. In addition, by minimizing the spot diameter on the photosensitive material and accurately controlling the amount of exposure from each laser element, the amount of exposure can be modulated, and a high gradation can be obtained. As a result, a high-definition image required for the ID photograph can be created.
Therefore, by adopting this exposure method in an identification photograph creating apparatus, it is possible to print a two-dimensional code with a higher density than before by the same apparatus.

[0088]

As described above, according to the identification photograph of the present invention, a photographic image based on a photograph of a subject, which is printed in a predetermined first area on a print medium, A coded image, which is generated by encoding a photographic image printed in a predetermined second area of the coded image, the contents of which are not visually recognizable and can be restored to the photographic image, With this configuration, it is possible to realize an inexpensive ID photograph having high security and easy handling, and a personal authentication medium to which the ID photo is attached.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of an identification photograph of the present invention.

FIG. 2 is a diagram illustrating an example of a QR code used as a two-dimensional code in the first embodiment.

FIG. 3 is a schematic configuration diagram of an identification photograph creating apparatus for creating an identification photograph of the present invention.

FIG. 4 is a block diagram illustrating functions of each unit of the identification photograph creating apparatus illustrated in FIG. 3;

FIG. 5 is a view showing a second embodiment of the identification photograph of the present invention.

FIG. 6 is a view showing a third embodiment of the identification photograph of the present invention.

FIG. 7 is a schematic configuration diagram of an embodiment of an identification photograph reading apparatus for reading an identification photograph of the present invention.

FIG. 8 is a diagram showing one embodiment of a personal authentication medium of the present invention.

FIG. 9 is a schematic diagram of a characteristic value creation device for creating an identification photograph according to a fourth embodiment of the present invention.

FIG. 10 is a block diagram illustrating functions of respective units of the characteristic value creating device illustrated in FIG. 9;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ID photograph 2 Print medium 3 1st area 4 Photo image 5 2nd area 6 Coded image 6a, 6b, 6c, 6d, 6e, 6f 2D code image 7 QR code 11 ID photo 14 Photo image 16 2D Code 20 Personal authentication medium 21 First area 22 Photo image 23 Second area 24 Coded image 25 ID photo 26 Print medium 27 Characteristic value 31 ID photo 32 Print medium 33 First area 34 Photo image 35 Second area 36 Coded image 100 ID photograph creation device 101 Subject 102 Camera 103 Printer 104 Input unit 105 Display unit 110 Control unit 111 Image input unit 112 Image processing unit 113 Printer control unit 114 Compression unit 115 Internal data unit 116 Encoding unit 200 Certification Photo reader 201 Two-dimensional code reader 202 Image processor Part 203 display unit 204 reproducing the face image 205 reproducing the character information 300 characteristic value generating unit 301 personal authentication medium 302 camera 303 printer 304 input unit 310 characteristic value generating unit 311 decode unit 312 calculating unit 313 control unit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideaki Ashikaga 430 Nakai-cho, Nakai-cho, Ashigara-gun, Kanagawa Prefecture Inside Fuji Xerox Fuji Xerox Co., Ltd. (72) Inventor Shoji Yamaguchi 430 Nakai-cho Sakai-Kamigami-gun, Kanagawa Prefecture Green Tech Nakai Fuji Xerox Co., Ltd. (72) Inventor Hidehiko Yamaguchi 430 Nakai-machi Sakai, Ashigara-gun, Kanagawa Green Tech Nakai Fuji Xerox Co., Ltd. F-term (reference) 2C005 HA03 HA04 HB01 HB02 HB03 JB02 JB06 JB12 JB33 LA33 LB32 5B035 AA15 BB08 BB12 BC00 5C076 AA14 BA02 BA06

Claims (9)

[Claims] 1. A photographic image based on a photograph of a subject printed on a predetermined first area on a print medium, and the photographic image printed on a predetermined second area on a print medium. A certification photograph, characterized by having a coded image generated by encoding, the contents of which cannot be visually recognized, and which can be restored to the photographic image. 2. The method according to claim 1, wherein the coded image includes:
By adding and encoding at least one or more of personal information unique to the individual to be photographed to identify the person to be photographed and condition information relating to photographing conditions at the time of photographing the photograph The identification photograph according to claim 1, wherein the identification photograph is generated. 3. The ID photograph according to claim 2, wherein said coded image is printed as one or more two-dimensional codes. 4. The ID photograph according to claim 1, wherein the encoded image is generated by encoding the photographic image information and then encoding the photographic image information. 5. The image processing apparatus according to claim 1, wherein the coded image includes, for all or a part of the coded image, an encryption key set by a photographer of the photograph, an encryption key set by a photographer of the photograph, and the code 2. The ID photograph according to claim 1, wherein the ID photo has been encrypted with at least one of the encryption keys set at the time of encryption. 6. The coded image is located at a position that does not hinder recognition of a photographic image printed on the first area.
2. The ID photograph according to claim 1, wherein the ID photograph is printed as a visually recognizable image. 7. The coded image is printed on the photographic image by a color material that is transparent to visible light and is recognizable by irradiation with infrared light or ultraviolet light. The identification photograph according to claim 1, wherein: 8. The coded image is generated by adding a unique characteristic value obtained by performing a predetermined arithmetic processing to the coded image and coding the coded image. Item 1. ID photo. 9. A personal authentication medium used for personal authentication in which personal information for identifying an individual is written on a print medium, wherein the personal authentication medium is printed in a predetermined first area on the print medium. A photographic image based on a photograph, printed on a predetermined second area on a print medium, generated by encoding the photographic image, the contents cannot be visually recognized, and the A personal authentication medium, comprising an identification photograph having a coded image that can be restored to a photographic image.