JP2009217596A - Personal authentication device and personal authentication method using this - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make accurate authentication possible regardless of variation of degree of coincidence with a vein pattern dictionary due to change of the living vein of a user or the variation of the degree of the coincidence due to life of the authentication device part. <P>SOLUTION: At every authentication by the personal authentication device, the authentication result is saved in a preservation means as historical information, based on the historical information saved by the preservation means, the degree of the coincidence with the vein pattern dictionary, exposure conditions, and the like, are outputted and displayed in time-series. When the degree of the coincidence falls in the output or display, before the authentication becomes impossible, the dictionary re-registration, maintenance check, and the like, are carried out. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a personal authentication apparatus and a personal authentication method for identifying an individual using a vein pattern among biometric information of a user.

  Among personal authentication devices, vein authentication devices generally extract a vein pattern by processing a near-infrared light source, an imaging unit sensitive to near-infrared light, and a user's vein image obtained from the imaging unit. A vein pattern extraction unit that performs authentication, and an authentication determination unit that compares the extracted vein pattern with vein pattern dictionary information.

  When a finger or palm that is part of the user's living body is imaged using near infrared light as a light source, the blood component absorbs near infrared light well, so the light from the venous blood vessel does not pass through the imaging part and appears dark. A vein image can be taken. A vein pattern is extracted from this vein image, collated with a vein pattern dictionary having vein pattern information of a plurality of users registered in advance, and compared to perform personal authentication.

  Patent Document 1 discloses a case having an insertion part for inserting one finger of a user with the fingerprint side facing the lower surface, a light source unit for irradiating transmitted light from the upper surface of the finger, and light for an arbitrary wavelength. A personal authentication apparatus is described that includes an interference filter unit having transparency, an imaging unit that images transmitted light that has passed through the interference filter unit, and an image calculation unit for finger vein image information output from the imaging unit. .

JP 2004-49705 A

  When highly reliable personal authentication is performed by a vein authentication device, first, it is necessary to consider fluctuations in the biometric conditions on the user side. In general, the thickness of a vein in a living body varies depending on the influence of personal conditions such as aging and disease, or environmental conditions such as outside air temperature and atmospheric pressure. For this reason, the vein pattern information to be imaged changes, the degree of coincidence with the vein pattern dictionary changes, and in the worst case, even if the vein pattern of the same person is the same, it may be impossible to make the same authentication determination. .

  Second, the problem of the vein authentication device itself occurs. For example, if the near-infrared LED used as the light source has a decrease in output due to the lifetime of the near-infrared LED or a decrease in the illuminance of near-infrared light due to contamination of the optical system, authentication determination is similarly impossible.

  The object of the present invention is to provide a means for outputting and displaying the fluctuation of the degree of coincidence with the vein pattern dictionary due to the change of the vein and the degree of coincidence due to the deterioration of the apparatus as history information. It is an object of the present invention to provide a novel personal authentication device and a personal authentication method that enable proactive measures to be taken before it becomes impossible.

  The present invention includes an imaging unit, a vein pattern extraction unit, a vein pattern dictionary, and an authentication determination unit, and images the veins constituting a part of a user's living body by the imaging unit, and extracts the vein pattern In the personal authentication apparatus for performing personal authentication by extracting the user's vein pattern in the authentication unit and comparing the vein pattern dictionary with the authentication determination means, the personal identification code of the authenticated user matches the vein pattern dictionary Authentication information storage means for storing the authentication record information of a plurality of times including the degree and the authentication time as history information, and outputting the user authentication record information extracted from the history information stored in the authentication information storage means in time series And history information processing means. Moreover, it has a display means for displaying the output of the history information processing means.

  In addition, the history information processing unit includes a calculation unit that extracts history information stored in the authentication information storage unit according to a specific condition and outputs the extracted information according to a time series.

  Further, the calculation means of the history information processing means has personal matching degree creating means for extracting the personal matching degree in a time series from the history information stored in the authentication information storing means.

  The calculation means of the history information processing means includes apparatus average coincidence degree creating means for extracting the average coincidence degree of the personal authentication apparatus in time series from the history information stored in the authentication information storage means.

  The history information processing means analyzes the history information stored in the authentication information storage means, and updates and registers the user's personal information in the personal authentication device when the degree of coincidence falls below a predetermined level. It has a monitoring means for outputting requested alarm information.

  The history information processing means is alarm information for requesting inspection and maintenance of the apparatus when the average coincidence of the personal authentication apparatus extracted from the history information stored in the authentication information storage means falls below a predetermined level. It has the monitoring means which outputs.

  Furthermore, it has an imaging unit, a vein pattern extraction unit, a vein pattern dictionary, and an authentication determination unit, and images the veins constituting a part of the user's living body by the imaging unit, and the vein pattern extraction unit In a personal authentication method in a personal authentication apparatus that extracts a user's vein pattern and compares the vein pattern dictionary with the vein pattern dictionary in the authentication determination means, the personal identification code of the authenticated user and the vein pattern dictionary The authentication record information of a plurality of times including the degree of coincidence and the authentication time is stored as history information, and the user's authentication record information extracted from the history information is output in time series.

  According to the present invention, an authentication result for each individual user, for example, a degree of coincidence with a vein pattern dictionary, and the like can be output and displayed in time series. As a result, when the degree of coincidence of a certain user is gradually decreasing, the degree of coincidence can be recovered by re-registering the vein pattern dictionary of the user and updating the personal information.

  In addition, the function of the personal authentication device that confirms the soundness of the personal authentication device can be output by displaying or evaluating the average matching score, the deviation of the matching score, exposure conditions, etc. of the entire personal authentication device in time series. is there.

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

  FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention. In FIG. 1, a vein authentication apparatus 1 includes a light irradiation unit 2, an imaging unit 4, a vein pattern extraction unit 5, a vein pattern dictionary 6, an authentication determination unit 7, an authentication information storage unit 8, a history information processing unit 9, and a display unit 10. The input means 11 is configured.

  Near-infrared light emitted from the light irradiation unit 2 passes through the living body 3 of the user to be authenticated and is imaged by the imaging unit 4. Since blood in the vein absorbs near-infrared light, the imaging unit 4 can capture an image including the vein pattern of the living body 3. The vein pattern extraction unit 5 removes noise and the like from the image of the imaging unit 4 and extracts vein pattern information.

  In the authentication determination means 7, the vein pattern extracted by the vein pattern extraction unit 5 is compared with the vein pattern dictionary 6. If the user's personal ID (personal identification code) is specified in advance, the user's vein pattern dictionary information is extracted and a comparison operation is performed. If the user's personal ID is unknown, a comparison operation with a plurality of vein pattern dictionary information is performed, and personal authentication is performed using the matched vein pattern. The authentication information output is input to the next authentication information storage means 8 and simultaneously output to a control device (not shown) outside the apparatus. The authentication information output can be directly input to the display means 10 and the result can be displayed in real time. The vein pattern dictionary includes a set of vein patterns of all user groups of the personal authentication system.

  The authentication information storage unit 8 generates history information with time information added to the output of the authentication determination unit 7, and stores history information including personal ID, time, coincidence, authentication success / failure, exposure conditions, and the like. .

  The history information processing means 9 processes arbitrary information in time series according to an operator's instruction using the input device 11. For example, the degree of coincidence of a specific individual, the average degree of coincidence of the whole device of the vein authentication device, the deviation of the degree of coincidence, and the like are displayed on the display device 10 by a time series graph. The output of the history information processing means 9 is given to the display means 10 and is also outputted to another control device (not shown) and used for a security system, an attendance management system, etc. incorporating an authentication device. In addition, the image is sent to a printer or other output device and displayed by hard copy.

  Next, important components of the present embodiment will be described in detail. As shown in FIG. 2, the authentication determination unit 7 includes a pattern comparison unit 71, a coincidence reference value comparison unit 72, and an authentication determination output unit 73. The pattern comparison means 71 aligns the pattern images of the vein pattern extracted by the vein pattern extraction unit 5 and the vein pattern dictionary 6, calculates the coincidence / non-coincidence for each pixel, and accumulates these to accumulate the degree of coincidence of the entire pattern Is calculated. The coincidence reference value comparison means 72 compares the coincidence calculated by the pattern comparison means with a predetermined coincidence reference value, and if the calculated coincidence is equal to or higher than the coincidence reference value, authentication is successful with the personal ID and the identity Output information. The authentication judgment output means 73 outputs the authentication success / failure output, personal ID, etc. to the control device such as the door control device, other security systems, and attendance management system, and the authentication success / failure information, personal ID, coincidence. The degree, exposure conditions, etc. are output to the authentication information storage means 8.

  As shown in FIG. 3, the authentication information storage means 8 adds the date and the date and time information of the time addition means 81 to the authentication information inputted from the authentication determination means 7 by the database writing means 82, and the history information as history information. Write to database 83. The database reading means 84 reads the history information requested from the history information database 83 in response to a request from the history information processing means 9 and sends it to the history information processing means 9.

  As shown in FIG. 4, in the history information processing means 9, the personal coincidence time series graph creation means 91 or the device average coincidence time series graph creation means 92 is activated by the designation of the input means 11, and the time series graph is created under the designated conditions. Create and output time-series information including When creating a personal coincidence time series graph, sort by the specified personal ID and create a time series graph with the specified conditions.

  The coincidence degree monitoring means 93 operates periodically, for example, once a day, and calculates the coincidence degree for each individual ID and the average coincidence degree of the devices to analyze the coincidence trend. For example, a lower limit specified value is specified for each value, and an alarm can be output when the degree of coincidence divides a predetermined lower limit specified value.

  If the alarm relates to the degree of coincidence of each person, re-register the vein pattern dictionary of each person, and if the alarm relates to a decrease in the average degree of coincidence of the entire apparatus, check the equipment, replace parts, etc. Implement preventive maintenance to maintain a better certification status. Reference numeral 94 denotes interface means, which outputs the above means to the display means 10 in response to an external request or to the control device described above.

  Next, a usage form of the output of the history information processing means 9 will be described. First, a method for dealing with a change in a user's biological condition will be described. FIG. 5 shows a monthly time series graph of the degree of coincidence regarding a specific user. The degree of coincidence has declined since January, and has fallen below 50% in August and September. As a result of re-registration of the personal information of the specific user based on this, the degree of coincidence has recovered after October.

  Various types of coincidence time series graphs can be output. For example, it is possible to output a monthly time series graph for a specified time zone of the day and a time series graph for each hour on a specific day. In addition, if it is determined that the degree of coincidence at morning work is poor, a time series graph is created for each hour of the day and the tendency is confirmed. If it is confirmed that the degree of coincidence is poor only in the morning, it is possible to improve the degree of coincidence during morning work by adding a user's vein pattern dictionary collected in the morning time zone.

  Next, a configuration corresponding to the deterioration variation of the vein authentication device itself will be described. When creating a time series graph of the average degree of coincidence of devices, the average and standard deviation of the degree of coincidence of all users of the authentication device are calculated from the history information of the period specified by the input means 11 in units of one day. It displays on the display means 10 as a series graph, and outputs it. Even if re-registration of each user's vein pattern dictionary is performed, the degree of coincidence does not recover, and if the average degree of coincidence of the entire device tends to decrease, there is a possibility that the authentication device has deteriorated or failed. There are preventive maintenance of personal authentication devices by inspecting devices and replacing parts. As described above, these can be dealt with by determining a reference value by the coincidence degree monitoring means 93 and automatically issuing an alarm.

It is a block diagram which shows the structure of the vein authentication apparatus of an Example of this invention. It is a block diagram which shows the structure of the authentication determination means of this invention Example. It is a block diagram which shows the structure of the authentication information storage means of the Example of this invention. It is a block diagram which shows the structure of the log | history information processing means of this invention Example. It is a graph which shows the time series information of the individual coincidence in the example of the present invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Vein authentication apparatus, 2 ... Light irradiation part, 3 ... Living body, 4 ... Imaging part, 5 ... Vein pattern extraction part, 6 ... Vein pattern dictionary, 7 ... Authentication determination means, 8 ... Authentication information storage means, 9 ... History Information processing means, 10 ... display means, 11 ... input means, 71 ... pattern comparison means, 72 ... coincidence reference value comparison means, 73 ... authentication judgment output means, 81 ... date and time addition means, 82 ... database writing means, 83 ... History information database 84 ... Database reading means 91 ... Personal coincidence time series graph creation means 92 ... Device average coincidence time series graph creation means 93 ... Match degree monitoring means 94 ... Interface means

Claims (12)

An imaging unit, a vein pattern extraction unit, a vein pattern dictionary, and an authentication determination unit. The imaging unit captures an image of a vein that forms part of the user's living body, and the vein pattern extraction unit In the personal authentication apparatus that performs personal authentication by extracting the vein pattern of the image and comparing the vein pattern dictionary with the vein pattern dictionary.
Authentication information storage means for storing a plurality of times of authentication record information including the degree of coincidence between the authenticated user's personal identification code and vein pattern dictionary and authentication time as history information, and history stored in the authentication information storage means A personal authentication apparatus, comprising: history information processing means for outputting user authentication record information extracted from information in time series.   2. The personal authentication device according to claim 1, further comprising display means for displaying an output of the history information processing means. In the personal authentication device according to claim 1 or 2,
The personal information authentication apparatus, wherein the history information processing unit includes a calculation unit that extracts history information stored in the authentication information storage unit according to a specific condition and outputs the history information according to a time series. In the personal authentication device according to claim 3,
The personal authentication apparatus, wherein the calculation means of the history information processing means has personal matching degree creation means for extracting the personal matching degree in a time series from the history information stored in the authentication information storage means. In the personal authentication device according to claim 3,
The computing means of the history information processing means has device average matching degree creating means for extracting the average matching degree of the personal authentication device in time series from the history information stored in the authentication information saving means. Authentication device. In the personal authentication device according to claim 3,
The history information processing unit analyzes the history information stored in the authentication information storage unit and requests update registration of the personal information of the user to the personal authentication device when the degree of coincidence falls below a predetermined level. A personal authentication device comprising monitoring means for outputting alarm information. In the personal authentication device according to claim 3,
The history information processing means outputs alarm information for requesting inspection and maintenance of the apparatus when the average coincidence of the personal authentication apparatus extracted from the history information stored in the authentication information storage means falls below a predetermined level. A personal authentication apparatus comprising monitoring means for performing An imaging unit, a vein pattern extraction unit, a vein pattern dictionary, and an authentication determination unit. The imaging unit captures an image of a vein that forms part of the user's living body, and the vein pattern extraction unit In the personal authentication method in the personal authentication device for performing personal authentication by extracting the vein pattern of the image and comparing the vein pattern dictionary with the vein pattern dictionary.
The authentication record information of a plurality of times including the degree of coincidence between the authenticated user's personal identification code and vein pattern dictionary and the authentication time is stored as history information, and the user authentication record information extracted from the history information is time-sequentially stored. According to the present invention, the personal authentication method is characterized in that output is performed according to In the personal authentication method according to claim 8,
A personal authentication method characterized in that the degree of personal coincidence is extracted in a time series from the history information stored in the authentication information storage means. In the personal authentication method according to claim 8,
A personal authentication method, characterized in that, from the history information stored in the authentication information storage means, the average matching degree of the personal authentication device is extracted in time series. In the personal authentication method according to claim 8,
Analyzing the history information stored in the authentication information storage means, and outputting alarm information requesting update registration of the personal information of the user to the personal authentication device when the degree of coincidence falls below a predetermined level. A personal authentication method. In the personal authentication method according to claim 8,
An individual that outputs alarm information for requesting inspection and maintenance of the device when the average coincidence of the personal authentication device extracted from the history information stored in the authentication information storage means falls below a predetermined level. Authentication method.

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