JP2009003492A - Mobile terminal with personal authentication function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly convenient mobile telephone terminal preventing unauthorized use by third parties by integrating a high-precision transmission-type finger vein authentication device into the structure of the mobile telephone terminal. <P>SOLUTION: The mobile telephone terminal having a display part, buttons, a voice output part, and an antenna is provided with a light source for emitting infrared light, an image pickup device for imaging a living body's vein with the light from the light source, a means for controlling the strength of the light applied, an image computing part for extracting features from the images and collating the features, and a positioning means for presenting the living body. The light source is installed within the antenna. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an apparatus for authenticating an individual using a blood vessel pattern and a portable terminal.

  In recent years, mobile phone terminals have become increasingly multifunctional, and mobile phone terminals are equipped with functions for handling personal data and property, such as mail functions, schedule management functions, and IC card functions, as well as telephone functions. It has become. Therefore, a means for preventing unauthorized use of mobile phone terminals and unauthorized data leakage is required. As a means for this, an authentication function using a personal identification number is installed in a mobile phone terminal as a standard. However, authentication using a personal identification number has a problem that even the terminal owner himself forgets the number.

  In view of this, a mobile phone having an authentication function using human biological information such as a fingerprint, a face, and an iris instead of a personal identification number has been proposed. For example, Patent Document 1 discloses a method for preventing information leakage or impersonation of a mobile phone terminal by mounting a fingerprint sensor, collating with a pre-registered fingerprint, and confirming the user. Patent Document 2 discloses a technique for performing face authentication using a camera-equipped mobile phone, and Patent Document 3 discloses an authentication technique using an iris.

  However, since the above biometric authentication uses information on the biometric surface, there is a risk that the biometric information is stolen by a third party and illegally used. For example, for fingerprint authentication, it has been pointed out that forged fingers can be created from the fingerprints of authorized users attached to the device. In the case of a face or an iris, the same problem as a fingerprint may occur because biometric information is exposed to the outside.

  On the other hand, an authentication technique using a finger vein is disclosed as authentication using information inside the living body (Patent Document 4). There are two methods for photographing the finger vein. One is a method for photographing light transmitted through a living body as disclosed in Patent Document 4, and the other is a method for photographing light reflected on the surface of the living body. The imaging method using transmitted light has the advantages that the contrast of the vein image to be imaged is higher than that of the reflected light method and the authentication accuracy is also high. However, in order to photograph transmitted light, it is necessary to install the camera and the light source at positions facing each other, and the apparatus becomes large. A conventional transmitted light type finger vein authentication device is larger than a portable terminal and is difficult to be incorporated into a portable terminal.

JP 2001-274897 A JP 2007-36365 A JP 2003-308130 A JP 2002-83298 A

  In the present invention, by incorporating a high-accuracy transmitted light finger vein authentication device into the structure of a mobile phone terminal, it is possible to realize a mobile phone terminal that is not illegally used by a third party and is highly convenient. Objective.

  In a portable terminal including a display unit that displays operation contents and a button that allows a user to input, a light source that emits infrared light, an imaging unit that captures a vein image of a living body using light from the light source, and the imaging Image processing for performing feature matching between an opening portion opening in the imaging direction of the image capturing unit, a storage device storing biometric information, feature extraction from an image captured by the image capturing unit, and biometric information stored in the storage device And a positioning means for determining an installation position of a living body to be installed, wherein the positioning means is provided between the light source and the imaging unit.

  The portable terminal is a housing configured to fold the first component and the second component, and the light source and the imaging unit are either the first component or the second component, respectively. The imaging unit is installed and images a vein image of a living body by light from the light source irradiated to a living body placed between the first component and the second component. To do.

  The portable terminal includes a light source that emits light, a storage device that stores biological information, an image calculation unit, a positioning unit that determines an installation position of a biological body to be installed, and a first communication unit. A captured biological image is captured from a housing including an imaging unit that captures a vein image of a living body by light from the light source provided in the portable terminal and a second communication unit that communicates with the first communication unit. It is received and collated with the biometric information stored in the storage device.

  A personal authentication device comprising a storage device that stores biometric information, an imaging unit that captures a vein image of the living body by light from the light source, an image calculation unit, and a first communication unit, The imaging unit is moved to the positioning means by the light emitted from the light source of the portable terminal having positioning means for determining the installation position of the living body to be installed and second communication means for communicating with the first communication means. A vein image of an installed living body is captured, and the image calculation unit performs personal authentication by collating with biological information stored in the storage device.

  Also, a portable device including an imaging unit that captures a vein image of a living body using light from a light source, a storage device that stores biological information, a positioning unit that determines an installation position of the biological body to be installed, and a first communication unit. A terminal, which captures a vein image of a living body set by light emitted from the light source of a housing having a light source that emits light and a second communication unit that communicates with the first communication unit; The biometric information stored in the storage device is collated.

  The personal authentication device includes a storage device that stores biometric information, a light source that emits light, an image calculation unit, and a first communication unit. Irradiating light to a portable terminal provided with positioning means for determining, an imaging unit for imaging a vein image of a living body by light from a light source, and second communication means for communicating with the first communication means, The image calculation unit receives a vein image picked up by the image pickup unit, compares the biometric information stored in the storage device, and performs personal authentication.

In addition, a light source that emits light, a biological information acquisition unit that includes an imaging unit that captures an image of a blood vessel of a living body using light from the light source, and an image calculation unit that performs feature extraction and feature matching from the captured image And a personal authentication device comprising a living body that can be operated with a connection portion as a fulcrum, and a switch that controls the current of the light source and the imaging unit by contact of the setting means.
In the contact state of the installation means, the installation means is located between the light source and the imaging unit.

  An authentication server having a storage unit for storing biometric information and a verification processing unit, wherein the verification processing unit is imaged by light from the light source transmitted from a portable terminal having a light source and an imaging unit It receives a vein image of a living body, performs a matching process with the biological information stored in the storage unit, and transmits a matching result to a second terminal storing the information.

  According to the present invention, it is possible to mount a transmitted light type finger vein authentication device without changing the appearance of a mobile phone terminal. In addition, highly accurate authentication can be performed even under external light.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, the finger vein authentication device will be described in particular. However, even with other living bodies such as palms, which perform authentication using an image generated by the irradiated light passing through the inside of the living body. Adaptable. In addition, although a mobile phone terminal is cited as an example of the information terminal, it can also be applied to other terminals such as a PDA and a PC.

  FIG. 1A is a schematic diagram of a configuration of a mobile phone terminal that implements the present invention. FIG. 1B shows the memory 12 and the storage device 14 in FIG. 1A in detail.

  The mobile phone terminal 2 includes a finger vein data acquisition unit 5, an authentication processing unit 6, and a user interface unit 7. The finger vein data acquisition unit 5 includes an infrared light source 3 and an imaging unit 4. The authentication processing unit 6 includes a CPU 11, a memory 12, and a storage device 14. The user interface unit 7 includes a button 41 for a user to input, a display unit 17 for displaying a result to the user, and a voice output unit 8 for transmitting the result by voice.

  When the user presents a finger to the finger vein data acquisition unit 5 of the mobile phone terminal 2, infrared light is emitted from the light source 3 to the finger 1. The light is scattered inside the finger 1, and the light transmitted through the finger 1 enters the imaging unit 4. The incident light is converted into an electrical signal by the imaging unit 4 and is taken into the authentication processing unit 6 as an image. The captured image is stored in the memory 12. Further, the registration data 200 and the authentication program 100 stored in the storage device 14 are stored in the memory 12 from the storage device 14 (FIG. 1B). The CPU 11 creates authentication data 250 from the input image in accordance with the authentication program 100 stored in the memory 12 and collates with the registration data 200. In the collation processing, a correlation between the two data to be compared is calculated, and it is determined whether or not it matches the registered data according to the value. An individual is authenticated according to this result. The authentication result is displayed on the display unit 17 or notified by voice from the speaker 8. If the authentication is successful, the lock is released and the mobile terminal can be used.

  FIG. 2 is a diagram showing an appearance of the mobile phone terminal 2 in the first embodiment of the present invention. 2A is a front view of the apparatus, and FIG. 2B shows a state where a user presents a finger and performs authentication.

  A fingertip positioning recess 21 is provided at the connection portion on the upper surface of the mobile phone terminal. The depression 21 is about the same size as the fingertip, and has a curved surface that matches the shape of the fingertip. An opening 24 is provided inside the recess. Under the opening 24, the imaging unit 4 is installed. The imaging unit 4 captures the light that has passed through the opening 24. The imaging unit 4 is provided with a filter 2 7 that transmits only infrared light in order to block unnecessary light. A light source 3 is installed inside the antenna. The light source 3 is installed toward the imaging unit 4.

  In the mobile phone terminal shown in this embodiment, various functions are locked immediately after the power is turned on, when there is no operation from the user for a certain period of time, or when the user sets the lock. When a user uses a mobile phone, the user authenticates to release the lock.

  The terminal unlocking procedure will be described below. First, the user extends the antenna 26 upward. When the antenna is extended, the light source 3 is turned on. Next, the user presents his / her fingertip in the depression 21 as shown in FIG. The light emitted from the light source 3 is transmitted from the back side of the presented finger to the ventral side. The imaging unit 4 captures the transmitted light to acquire a vein pattern on the palm side of the finger. By embedding the light source 3 in the antenna 26, it is possible to photograph the finger vein by the transmitted light method without changing the appearance of the mobile phone terminal. Thereby, a clear vein image can be acquired. Based on the captured vein pattern, the authentication processing unit 6 performs an authentication process, and when it is determined that the user is an authorized user, the mobile phone terminal is unlocked. Note that it is possible to perform finger positioning by providing a mark indicating the finger presentation position instead of the positioning recess 21. In this case, a cellular phone terminal having a planar structure can be realized.

  Since the mobile phone terminal 2 is used even outdoors, it must be able to capture a clear image even under external light. The shape of the opening 24 for capturing a clear image while blocking external light will be described with reference to FIG. The mobile phone terminal 2 includes the recess 21 and the opening 24 as described above. The upper surface and the depression 21 of the mobile phone terminal 2 are made of a material opaque to infrared light, and the opening 24 is transparent to infrared light. An imaging unit 4 is installed below the opening.

  In finger vein authentication, a vein pattern is acquired by photographing light transmitted through a finger. Therefore, when the external light reflected on the finger surface reaches the imaging unit 4, the transmitted light component is canceled and the image quality of the vein image is deteriorated. In order to obtain a high-quality vein image, it is necessary to prevent external light from being reflected on the surface of the finger on the imaging unit side. Therefore, the width and length of the opening are made smaller than the width and length of the finger. Further, the user presents the finger so as to cover the entire opening with the finger (FIGS. 3B and 3C). Even when photographing is performed under external light, all light directed to the surface of the finger on the imaging unit side is blocked by the finger rest. For this reason, no light hits the finger surface and no reflected light is generated. Thereby, it can authenticate also outdoors.

  The opening 24 is provided with an acrylic plate 31 for preventing dust from entering the terminal. The acrylic plate 31 is installed at a position several millimeters lower than the upper surface of the finger rest. Thereby, when the finger is presented, the ventral side of the finger and the acrylic plate do not come into contact (FIG. 3C). Therefore, even when the finger rest and the finger are completely brought into close contact, the vein pattern is not crushed by the acrylic plate, and a stable vein pattern can be obtained each time.

  The opening 24 is provided at a position about 10 mm away from the position of the finger tip of the recess 21. Thus, when the user presents the fingertip in the depression, the periphery of the first joint of the finger is placed above the opening. The periphery of the first joint has a thinner epidermis and a larger blood vessel diameter than the fingertip, so that a clearer vein pattern can be photographed. In FIG. 3, the opening 24 and the depression 21 are shown in different colors for the sake of explanation. However, if the opening is made in a conspicuous color in this way, the user mistakenly positions the fingertip on the opening. It may be adjusted. In order to guide the user to place his / her finger at the correct position, it is desirable that the recess 21 and the opening are made of the same color material so that the opening 24 is not visually noticeable. Furthermore, since the curve of the recess 21 is matched to the shape of the fingertip, this curve is visually conspicuous. Thereby, a user can position a finger paying attention only to the hollow 21.

  In the mobile phone terminal shown in FIG. 1, the registration data is stored in the storage device 14 built in the mobile phone terminal. However, the registration data is stored in a storage medium removable from the mobile phone terminal, inserted into the mobile phone terminal, and authenticated. The data 250 and the registered data 200 in the storage medium can be collated. Examples of removable media include a SIM (Subscriber Identity Module) card and an SD card. The SIM card is an IC card in which a user's telephone number, user ID, and mobile phone carrier information are recorded. By replacing this, the mobile phone terminal can be changed without changing the telephone number.

  When the SIM card is used as the storage destination of the registration data 200, it is not necessary to re-shoot the registration data when the mobile phone terminal is changed, and convenience is improved. Furthermore, it is possible to perform a verification process using a CPU mounted on a SIM card. By collating in the card, the registration data 200 does not go outside the SIM card, and more secure authentication is possible.

  However, since the CPU in the SIM card has a lower processing capacity than the CPU 11 in the mobile phone terminal, authentication takes time. Therefore, the user can select whether to perform authentication in the SIM card or to read the registration data 200 into the memory 12 in the mobile phone terminal and perform authentication in the CPU 11 depending on the security level desired by the user. Selection of the CPU to be used is set by the user using the button 41.

  Hereinafter, an example of a processing procedure performed by the authentication program 100 will be described with reference to FIG.

  First, processing for detecting presentation of a finger is performed (S101). In order to acquire a vein image with the mobile phone terminal 2, it is necessary that a finger is presented on the opening 24. As a method of detecting that the finger has been correctly presented, the light source 3 is slightly turned on at the same time as the start of authentication, and the light is shielded, or the touch placed at the fingertip presentation position of the depression 21 A method of detecting that a finger is touched by a sensor can be used.

  When the presentation of the finger is detected, the light amount of the light source 3 is adjusted so as to obtain the clearest image (S103). For this purpose, the average luminance value of the image is constantly monitored, the light amount is feedback-controlled according to that value, and an evaluation function that determines the sharpness of the pattern is applied to the finger vein pattern image, and the result is optimized. For example, a method for adjusting the amount of light can be used.

  Next, a blood vessel pattern feature extraction process is performed (S108). As this technique, a method using an edge emphasis filter or a matched filter for emphasizing a line segment, a method of extracting a line pattern by tracking a line component, and a method of extracting a local depression position of a luminance value in a cross-sectional profile of an image Etc. can be used.

  Thereafter, feature quantities are extracted from the extracted or emphasized blood vessel pattern (S109). As the feature amount, a method of using the image itself as a feature amount, a method of detecting a branch point or an end point, and the like can be used. When the image itself is used as a feature amount, a reduction process may be applied to the image after feature extraction in order to reduce the data size.

  Finally, the generated feature value is compared with the feature value registered in advance. (S112). In the case where the image itself is used as a feature amount, the images are overlapped and the pixel values are compared to calculate the coincidence rate. When a branch point or an end point is used as a feature amount, the coincidence rate is calculated by comparing information such as the position, the number, the angle of the branch line, and the relative distance. Whether the patterns are the same pattern or different patterns is determined based on the matching rate obtained here. The threshold for determination can be statistically calculated in advance. If the coincidence rate is higher than the threshold value, it is determined that the user is a registered person.

If it is determined that the user is a registered person, the mobile phone is unlocked (S114).
FIG. 5 is an explanatory diagram of internal processing that enables authentication corresponding to rough placement. When a user presents a finger on the apparatus, the position of the finger may be shifted between registration and authentication. In order to realize a highly convenient apparatus, it is necessary to perform authentication that compensates for the positional deviation even when a rotational deviation occurs during authentication. When the contour of the finger can be photographed, it is possible to obtain the finger contour information from the image by using the high linearity and to calculate the finger angle with high accuracy. By using this angle to perform rotation correction in a predetermined direction, it is possible to generate a pattern without rotational deviation. However, as shown in FIG. 3, this method cannot be used with an apparatus that cannot capture the outline of a finger. Therefore, the collating process is performed while compensating for the rotational deviation by the following process.

  First, the registration process will be described. The user presents the finger to be registered to the device only once, and at that time, a single vein image is taken. A feature extraction process S109 is performed on the captured image. A rotation process is performed on the image obtained by the feature extraction process. As a result, the rotated registration data is obtained. The rotated registration data 200 is obtained by changing the rotation angle little by little (for example, by 1 degree). At the time of registration, all the plurality of generated images are stored in the storage device 14.

  Next, processing at the time of authentication will be described. At the time of authentication, a rotation pattern is not created for the presented finger vein image, and one collation data 250 is obtained from one captured vein image. Next, the collation data is collated with all the plurality of registered patterns prepared at the time of registration to obtain a plurality of coincidence rates. Of these, the one with the maximum value is adopted as the final matching rate.

  If a plurality of rotated data is registered, even if the finger is rotated at the time of collation, the coincidence rate with any registered data becomes a value equal to or higher than the authentication threshold value, and the person is correctly authenticated. This makes it possible to implement an apparatus that can handle rough placement.

  In the above example, a plurality of rotated images are generated at the time of registration. However, if a single registered image is generated at the time of registration and a plurality of rotated images are generated at the time of verification, the rough placement is the same as above. Authentication corresponding to the direction becomes possible. In that case, since there is only one registered image, the registered data size can be reduced.

  FIG. 6 is an example of a rotation correction method in which vein patterns with different angles taken are aligned in a certain direction. In general, finger veins tend to travel along the longitudinal direction of the finger. Therefore, using this feature, the rotation angle is uniquely normalized using only the extracted pattern. An example of this process is shown below.

  FIG. 6A shows a vein pattern that does not include contour information. Here, it is assumed that the long axis direction of the finger is placed in the horizontal direction of the pattern. The vein pattern includes a vein 321 indicated by a black line and a background 322 indicated by a white area. Since the finger outline is not reflected, the angle at which the finger is placed is unknown. However, since the vein pattern has many components in the long axis direction of the finger, this embodiment includes many line patterns that generally go in the left-right direction. Therefore, an average value in the direction in which the pattern travels is obtained, and the direction in which the pattern travels is calculated as a whole.

  First, the total amount of the horizontal components of the line pattern is calculated. FIG. 6B is a partially enlarged view of FIG. 6A, and one square corresponds to one pixel. When attention is paid to two adjacent pixels, such as point A and point B, one (here, point A) is defined as a vein and the other (here, point B) is defined as a background. Yes. When such a combination appears, the edge of the pattern faces the left-right direction. If the right direction is a positive direction, it can be considered that the line pattern is traveling rightward locally. By counting the total number of pixels for the entire area of the pattern, the amount of the right component of the overall pattern can be calculated. Next, attention is paid to two adjacent pixels in the upper left and lower right relationship. For example, when attention is paid to point C and point D, point C is defined as background and point D is defined as vein. In this case, it can be seen that the vein is traveling in the upper right direction. Accordingly, by obtaining the total number in the entire pattern, the amount of the upper right direction component of the line pattern can be obtained. Similarly, paying attention to pixels adjacent to the upper left and lower right, the amount of the component of the pattern in the lower right direction is obtained. From these, the vector amounts of the components in the right direction and 45 degrees oblique directions are obtained.

  Next, the obtained vector quantities are combined, and the angle at which the combined vector intersects with the right direction is calculated. FIG. 6C shows a vector of the pattern. Here, the vector component 323 in the right direction, the vector component 324 in the upper right direction, and the vector component 325 in the lower right direction obtained as described above are shown. These vectors are combined to obtain a combined vector 326. Although different depending on the shape of the vein pattern, since the vein pattern has many components toward the right direction, the combined vector is substantially along the right direction. However, it has a value θ slightly at the intersection angle with the right direction. If the same finger is placed at the same angle, θ is constant every time. Also, if the finger is rotated and placed, θ increases or decreases in accordance with the rotation angle. Therefore, if the pattern is rotated in accordance with this θ, the rotation can be corrected in a certain direction.

  Finally, the pattern is rotated in a direction in which the intersection angle of the combined vector 326 with respect to the horizontal direction becomes 0 degrees. FIG. 6D shows the pattern of FIG. 6A rotated by θ. Thus, when the same finger is presented, the rotation is always corrected so that θ is 0 degree, and the same pattern is always generated with respect to the rotation of the finger. Thereby, authentication strong against finger rotation can be realized.

  In this method, since the rotation can be corrected by only one registered finger vein pattern and one input finger vein pattern, the collating process can be speeded up.

  In the above-described embodiment, only the three directional components, right and 45 degrees, are calculated. However, a tangent having a high angular resolution is obtained for a certain point including a plurality of neighboring pixel values. A combined vector of the entire images may be calculated. As a method of detecting the direction component of the vein pattern, in addition to the method of examining the direction of the edge between the line pattern and the background as described above, the line pattern is thinned and the direction of the adjacent line pattern is directed to which direction. It is also possible to use a method of measuring whether or not the entire pattern. Further, if attention is paid only to two adjacent pixels, it is easily affected by accidental noise. Therefore, the direction of the line segment may be obtained by using line information or edge information connected over a certain length, and averaged over the entire image. When the length is shorter than the specified value, it is excluded from the calculation of the direction component, so that the influence of fine noise can be removed.

  As a method of performing the rotation correction, in addition to the analysis from the captured image of the vein pattern, a method of using information acquired by other sensors can be considered. For example, a blood flow sensor is used to statistically determine the direction of blood flow in the imaged region, and the direction is always corrected to be constant. If the vein pattern is the same, the flow direction is always constant, so that rotation can be corrected.

  FIG. 7 is a diagram showing the appearance of the mobile phone terminal 2 in the second embodiment of the present invention. FIG. 7 (a) is a front view of the apparatus, FIG. 7 (b) is a side view, and FIGS. 7 (c) and 7 (d) show how a user presents a finger and performs authentication.

  The cellular phone shown in this embodiment is a foldable portable terminal in which a first casing 81 and a second casing 83 are connected by a hinge 85. The first casing 81 is provided with a display unit 17 for displaying to the user, an earpiece 88, an antenna 26, and a light source 3 for finger vein photography. The light source 3 is substantially perpendicular to the first housing, and is installed in a direction to irradiate the second housing when the mobile phone terminal is folded.

  The second casing 83 of the mobile phone terminal includes a mouthpiece 89 for making a call, a plurality of buttons 41 for a user to input a telephone number and characters, and an imaging unit 4 for vein imaging. Prepare. The imaging unit 4 is arranged in a positional relationship such that the light source and the imaging unit face each other when the mobile phone terminal is folded.

  In the cellular phone terminal shown in this embodiment, various functions are locked when the terminal is folded. The terminal unlocking procedure will be described below. First, the mobile phone terminal 2 is opened. The mobile phone terminal 2 opens to an angle suitable for authentication processing and stops. The angle suitable for authentication is an angle at which the light source 3 faces the imaging unit 4 and a space for presenting a finger on the imaging device 4 exists. When the terminal is opened, the light source 3 is turned on. The user presents the fingertip on the imaging device 4 as shown in FIG. At this time, light is emitted from the light source 3 to the back side of the finger. The imaging unit 4 captures light transmitted through the fingertip. Thereby, the vein pattern on the palm side of the fingertip can be acquired. After the vein image is captured, the above-described authentication process is performed, and if the authentication is correctly performed, the mobile phone is unlocked.

  In this embodiment, the light source 3 and the image pickup unit 4 are installed separately in a first housing and a second housing of a folding mobile phone terminal. As a result, a transmitted light type finger vein authentication device can be incorporated into a mobile phone terminal without changing the size and appearance of the mobile phone terminal. Moreover, the vein on the palm side of the finger can be imaged by installing the imaging unit 4 in the second housing. Since the palm side skin has few wrinkles and a clear vein pattern is obtained, the authentication accuracy can be improved.

FIG. 8 shows an embodiment of a folding mobile phone terminal in which the light source 3 is embedded in a button.
FIG. 8A is a front view of the apparatus, and FIG. 8B is a diagram showing the internal configuration of the button. The second casing 83 of the foldable portable terminal 2 is provided with a plurality of buttons such as a dial key and a power key. Among these, in addition to the visible light source 91, an infrared light source 3 for vein photography is installed inside the buttons 41-b to 41-e arranged in a central vertical row as shown in FIG. Has been. The display unit 17 of the first housing is made of a material that can transmit infrared light, and the imaging device 4 is installed inside the display unit 17. The imaging unit 4 is installed in a direction in which all the buttons 41-b to 41-e can be photographed when the mobile terminal is opened at an angle as shown in FIG.

  As shown in FIGS. 8C and 8D, the user aligns the fingertip with the button 41-a and presents the finger with the direction of the finger aligned with the buttons 41-b to 41-e. Thereafter, when the button 41-a is pressed, the light sources 3 in the buttons 41-b to 41-e are turned on. The light emitted from the light source 3 passes through the finger and reaches the imaging device 4 through the back side surface of the finger. At this time, a vein existing on the back side of the finger blocks the light, so that the vein pattern on the back side of the finger is photographed. The above authentication process is performed based on the captured vein image. If it is determined that the user is the person, the mobile phone terminal is unlocked.

  As a result, it is possible to photograph a transmitted light type finger vein without changing the size and appearance of the mobile phone terminal. In this terminal, the finger position is adjusted by touching the button, so the reproducibility of the finger presentation position is improved. This increases the authentication accuracy. Furthermore, when the button and the finger are brought into close contact with each other, the light emitted from the light source is all emitted to the finger, and the light leakage component is reduced. As a result, a clear image can be taken with a small amount of light, and the power consumption of the apparatus can be suppressed.

  In the above-described embodiment, the light source and the imaging unit, which are parts for finger vein imaging, are installed in the terminal. However, these parts may be separately installed in the mobile phone terminal and the reading device to capture the veins. Is possible. FIG. 9 is an example of an embodiment of a vein authentication device that includes a light source in a portable terminal and an imaging device on the reading device side.

  FIGS. 9A and 9B are configuration diagrams of the portable terminal in this embodiment. A light source 3 is provided inside the portable terminal 2 and a vein is observed by irradiating light on a finger. A concave finger guide part 304 exists at the top of the portable terminal 2, and the light source 3 is installed at the center of the concave. In addition, biological information is stored in the storage device 14.

  FIG. 9 (c) shows a biometric authentication procedure in this embodiment. The portable terminal 2 and the reading device 310 have independent shapes, and the authentication process is performed by the mutual operation of both. The reading device 310 is installed in, for example, a cash register or ticket gate that requires payment, a door in which entry / exit is managed, a car, or the like. In this configuration, an apparatus for imaging a living body inside the mobile terminal 2 is not necessary. Accordingly, the cost and power consumption of the mobile terminal can be reduced.

  When the user grasps the portable terminal 2, the finger 1 can be placed on the finger guide unit 304 in a natural manner. The fingers in the gripped state are stretched at the back of the fingers by bending the joints, and wrinkles unevenness distributed in the epidermis is reduced. Thereby, the light transmitted through the finger 1 can be prevented from diffusing in the epidermis, and the veins distributed in the back of the epidermis on the back side of the finger 1 can be clearly photographed. Further, since the user grasps the portable terminal 2, the light source 3 is in close contact with the palm side of the finger 1. As a result, the leakage component of the irradiated light is reduced, the light use efficiency is increased, and the deterioration of the image quality due to the influence of the leaked light is reduced.

  The user brings the back surface of the finger 1 close to the reading device 310 while holding the mobile terminal 2 as described above. At this time, when the mobile phone terminal 2 and the reading device 310 are close to each other by a specific distance, both of them are connected via the wireless communication unit 305 provided in the mobile phone terminal 2 and the wireless communication unit 314 provided in the reading device 310. Perform wireless communication with each other and start communication negotiation. In this process, device authentication, communication path encryption, and the like are performed using the device ID assigned to the device. Thereby, it is confirmed that the portable terminal 2 is a legitimate device, and communication contents cannot be intercepted by encryption, and safe communication can be performed. In parallel with this, the user brings the back side of the finger into contact with the finger placement recess 311 on the reading device side. At this time, the authentication process is started when the contact sensor 312 detects the contact of the finger 1.

  First, the reading device 310 sends an authentication start signal to the mobile terminal 2 via the communication path established above. In response to this, the portable terminal 2 turns on the light source 3. The light transmitted through the finger 1 is photographed by the imaging device 4 provided inside the reading device 310. Thereby, an image of transmitted light on the back side of the finger 1 can be acquired. Next, the CPU 315 inside the reading device 310 extracts the feature data of veins displayed on the video according to the authentication processing program. Subsequently, the extracted feature data is transferred to the mobile terminal 2. In the portable terminal, when the feature amount of the individual vein pattern registered in the storage device 14 in advance and the feature amount of the photographed pattern are compared and collated by the CPU 11, it is recognized that both patterns match. The authentication process is performed. If the authentication is successful, control of billing information, entry / exit management, and the like are performed using the user ID stored in the storage device 14 inside the portable terminal 2. Note that the CPU 11 mounted on the portable terminal 2 may not be able to realize a high-load process due to low power consumption, miniaturization, cost reduction, and the like. In this case, the registration data stored in the portable terminal 2 can be transferred to the reading device 310 and the CPU 315 on the reading device side can perform the authentication process. In addition to performing device authentication with each other, it is difficult to intercept registration information because the communication path is encrypted. Thereby, it is possible to perform a safe authentication process while suppressing power consumption of the mobile terminal 2. If the usage place is limited, the biometric information is stored on the reading device side, the biometric information to be used is selected from the device ID of the portable terminal 2, and the authentication process is performed. The amount of memory consumed internally can be reduced.

When photographing the vein pattern, the light amount of the light source is adjusted so that the vein pattern can be captured more clearly. The light quantity adjustment method is performed by evaluating the output light quantity and the image taken at that time to determine a light quantity suitable for photography and performing another photography at the next timing. In this embodiment, the control for outputting the amount of light is performed on the mobile terminal side, and the captured image is evaluated on the reading device side. Therefore, it is necessary to exchange information for light amount adjustment between the reading device side and the portable terminal side. For example, a method of returning the captured image itself or the image brightness evaluation value calculated by the reading device side to the mobile terminal side, or sending the light amount value irradiated by the mobile terminal side to the reading device side and calculating the following A method of returning information on the light amount value to be irradiated to the portable terminal side is conceivable. However, in any method, it is necessary to communicate feedback information.
When communication cannot be performed at high speed, a delay occurs by feeding back these pieces of information, and the time required for the authentication process becomes longer, and convenience is lowered. In this case, it is necessary to perform light amount control without performing communication with the wireless communication path. An example of such control is shown below.

First, the mobile terminal 2 always irradiates the finger 1 with a certain amount of light regardless of the thickness of the finger 1 or the like. The imaging device 4 that captures the video includes a gain controller 316, and the CPU 315 on the reading device side evaluates the captured finger vein image. At this time, if it is determined that the amount of light is strong, the gain controller 316 is controlled to reduce the light receiving sensitivity. Conversely, when it is determined that the amount of light is weak, control is performed to increase the light receiving sensitivity. However, since the influence of noise becomes stronger when the light receiving sensitivity is increased, the light quantity value to be irradiated is set as strong as possible so that a sufficient amount of light is transmitted through the finger even with a thick finger. If the amount of light cannot be set strongly, the dynamic range of the luminance value can be expanded by adding images taken continuously in time series in order to suppress the influence of noise as much as possible. Thereby, the noise component is weakened, and stable pattern extraction can be performed.
According to this embodiment, it is possible to reduce the processing load, cost, size, weight, and the like of the mobile terminal 2.

  In the present embodiment, the finger guide portion 304 formed on the mobile terminal 2 is installed on the upper side, but it may be installed on the side surface or the lower side of the mobile terminal 2, and a protruding antenna is used. In the case of a portable terminal having such a configuration, the light source 3 may be installed at the tip of the antenna, the belly side of the finger 1 may be pressed against the antenna tip, and the finger 1 may be bent. A method suitable for the design of a portable terminal can be applied.

  Further, the light source 3 can be irradiated in a state where the finger 1 does not touch the contact sensor 312, and authentication can be performed in a non-contact state. Since no contact is required, authentication is possible even when the reading device 310 is far away, and highly convenient authentication can be realized.

  FIG. 10 shows an example in which the imaging unit 4 is installed in the mobile phone terminal and the light source 3 is installed in the reading terminal. 10A and 10B are a top view and a side view of the mobile phone terminal 2, respectively, and FIG. 10C is a top view of the reading device. FIG. 10 (d) shows how the user authenticates.

  An imaging unit 4 is installed in the mobile phone terminal 2. The imaging unit 4 is installed in a direction that allows photographing the outside of the mobile phone terminal. In addition, the cellular phone terminal 2 is provided with a hollow finger guide portion 304 that indicates a finger presentation position. In addition, registration data 200 is held in the storage device 14 in the mobile phone terminal 2. The reading device 310 is installed at a cash register for making a payment, a ticket gate, or the like. A light source 3 is installed inside the reading device 310. The CPU and storage device may be in the mobile phone terminal 2 or on the reading device 10 side.

  When making a payment, the user puts the portable terminal in the finger guide unit 304 with the fingertip. The finger guide unit 304 can determine the finger presentation position by touching it. Thereafter, the mobile phone terminal 2 is brought close to the reading device 310. The mobile phone terminal 2 and the reading device 310 include wireless communication units 305 and 314, respectively, and perform communication via these units. When the mobile phone terminal 2 is recognized by the reading device 310, authentication starts.

  First, the light source 3 inside the reader is turned on. At this time, a vein image on the ventral side of the finger is taken by the imaging unit inside the mobile phone terminal 2. Next, the CPU 11 inside the mobile phone terminal 2 performs authentication processing according to the authentication processing program 100. When the authentication is successful, the accounting information and the like are controlled.

  In this embodiment, when capturing a vein image, it is necessary to perform a light amount adjustment process S103 in order to capture a clear image. However, the mobile phone terminal that captures a vein image and the reading terminal 310 on which the amount of light is installed are independent. Therefore, it is necessary to exchange information for light amount adjustment between the reading device side and the portable terminal side. First, the current light amount value of the light source 3 is transmitted from the reading device side to the mobile phone terminal. The mobile phone terminal 2 calculates the average luminance value of the captured image at this time. A light amount value suitable for the presented finger is obtained from the calculated luminance value and the received light amount value information. The obtained light quantity value information is transmitted to the reading device 310. The reading device 310 controls the light amount so that the received light amount value is obtained. With the above processing, an appropriate light amount value can be set, and a clear vein image can be acquired.

  Further, the gain of the imaging unit in the mobile phone terminal 2 may be controlled without adjusting the light amount. In this case, the light intensity of the light source 3 is set to a sufficiently strong intensity so that even a thick finger can shoot. In the mobile phone terminal, the average luminance value of the captured image of the captured image is calculated. If the average luminance value is higher than the target value, the gain of the imaging unit 4 is adjusted to lower the sensitivity, and if the average luminance value is lower than the target value, the sensitivity is increased. By repeating this operation, the luminance value of the captured image can be adjusted to the target value. As a result, an image suitable for authentication can be taken without performing communication between the reading terminal 310 and the mobile phone terminal 2.

  In the authentication of the present embodiment, the authentication can be performed simply by holding the portable terminal and holding it. As in the first to third embodiments, an operation for starting authentication such as extending the antenna or opening the mobile phone is unnecessary. Therefore, it is suitable for use in a place where it is desired to perform authentication immediately after taking out the mobile phone, like payment at a ticket gate.

  In the present invention, not only the vein pattern is imaged and used for authentication with a dedicated light source, but also ambient light such as sunlight and electric light existing around the apparatus can be used as the light source. Many of the ambient light contains light in the near-infrared wavelength range necessary for vein pattern imaging, and it is possible to shoot sufficiently, especially if it is a strong light source such as sunlight or a spotlight in fine weather. It is. On the other hand, many mobile phones are equipped with an imaging unit as a function for taking pictures of people, landscapes, and the like. The imaging unit equipped for such an application is not significantly different from the imaging unit described as an imaging unit for vein imaging in the present invention as a basic specification. Therefore, by using this imaging unit and the ambient light, it is possible to provide a vein authentication function without making a major change to the hardware configuration of an existing mobile phone. The problem at this time is that a filter that cuts light in a wavelength range other than visible light that is not necessary for viewing photos is attached to a normal imaging unit in order to improve image quality. This filter loses light in the near-infrared wavelength region necessary to project the vein pattern. In order to use the imaging unit for both normal imaging and vein imaging, the filter must be enabled or disabled as necessary.

  FIG. 11 shows an example of a filter detachable mobile phone. Reference numeral 2 in the figure denotes a mobile phone main body, which is shown with a top view and a side view. The main body incorporates an image pickup unit 122 for both normal photographing and vein photographing, and the filter 27 can be mechanically moved manually by a lever switch 126 according to the operation state. The filter can be made to function or be invalidated by putting it on or off the optical system of the image pickup unit. In this example, it will be described as manual optical desorption, but it can be moved by using a motor, etc., or by using a material that changes the wavelength transmission characteristics of light by external control. It is also possible to automatically change the state of the filter in accordance with. The mobile phone body is provided with a guidance mark indicating the position where the finger should be placed and a protrusion shape 128 around the imaging unit. During authentication, the finger is placed according to the guidance and exposed to ambient light. You can authenticate with. Since the intensity of ambient light cannot be controlled, whether the light intensity is appropriate for vein imaging varies from time to time. Therefore, the sensitivity is changed by controlling the gain and aperture of the imaging unit so that an appropriate shooting state is obtained. Specifically, when the captured image is processed and the brightness is above or below the specified brightness, or when a non-negligible ratio of the entire image is whiteout or blackout, the sensitivity is increased or decreased. Adjust the image quality to be within the specified range.

  However, since the range that can be adjusted by the sensitivity of the imaging unit is limited, it may not be possible to adjust to an appropriate image quality depending on the intensity of ambient light. However, even in such a case, the image quality may be adjusted to an appropriate value depending on the direction of light. In the case of a mobile phone, the device itself can be changed to various angles by holding it, so that the user can be prompted to change the way of holding so that the image quality can be adjusted. Specifically, if it is determined that the light is too strong as a result of analyzing the captured image, the user is informed that the light is strong, the finger is left at the guidance position, and the mobile phone is placed in a darker position. Or change the angle of the mobile phone so that the finger is slightly shadowed with respect to the light source direction. Conversely, if it is too dark, the user is encouraged to hold the mobile phone in the form of holding the finger against the light source. At this time, as a method of notifying the user, there are a method of displaying characters and symbols on a display of a mobile phone or lighting an indicator, and a method of indicating dark / bright by sound or voice. In the case of a display device, it may not be possible to read depending on how the mobile phone is held, but it is possible to notify the user in any way as long as it is sound. On the other hand, in addition to this, it is also possible to more specifically instruct which direction and how much the light should be tilted by separately detecting the strong direction of light and its intensity with a separate sensor or the like.

  Finally, when the authentication is successful, the indicator 121 lights up in a corresponding color or blinking state to explicitly notify the user. In this case as well, notification by sound or voice can be made regardless of the orientation of the mobile phone.

  At this time, the focal length may differ greatly between normal imaging and vein imaging. This is because, in vein imaging, a finger is brought close to the imaging unit. Therefore, in order to enable close-up photography, the lens setting and the position of the imaging unit may be changed during vein imaging in conjunction with the filter attachment / detachment operation so that an optimum focal length can be obtained.

  In the above, desorption of a filter that cuts near-infrared light was explained. However, if a wavelength with a significant difference between the light absorption rate of hemoglobin in the blood and the light absorption rate in other living tissues is selected, visible light is removed. Even in this case, the vein pattern may be captured. Therefore, a method for enabling vein authentication by using a band-pass filter that efficiently transmits only the wavelength can be considered. Of course, in this case as well, when normal shooting is performed using a band-pass filter, the color of the shot image is biased and is not suitable for ornamental use.

  In the above description, the method of using the imaging unit for vein imaging has been described. However, it is conceivable to capture a vein pattern based on another principle. Since blood flows through the veins, it is possible to obtain a vein pattern by detecting and visualizing the part with flow. As a method for detecting a flow portion, a method using the Doppler principle is widely known. In fact, blood flow sensors using this principle have already been put into practical use. Conventional blood flow sensors have been designed to measure the blood flow, so none have a resolution that is fine enough to visualize a vein pattern as a pattern. However, recent advances in microfabrication technology have made the device extremely small as a single device, combining a light emitting source such as a semiconductor laser for detecting Doppler shift and a light receiving device for detecting frequency shift of light. It is also possible to arrange them in a two-dimensional matrix array. According to this, it is possible to make the vein pattern emerge as a two-dimensional distribution of the flow velocity by placing a finger on the matrix array, as in the case where the image sensor was used to image the change due to light absorption of hemoglobin as a vein pattern. Become. This venous imaging method based on the flow velocity more directly reflects the characteristics of the living body that blood is flowing, and can be said to be more resistant to threats such as counterfeiting.

  The component arrangement of the vein data acquisition unit 5 of the present invention can be used not only for use as a built-in mobile phone terminal but also for various situations requiring personal authentication, such as exit management, PC login, automobile, ATM, and the like.

  FIG. 12 shows an embodiment of a small finger vein authentication device in which a light source is installed on a movable lid. 12 (a) is a side view with the lid closed, FIG. 12 (b) is a side view with the lid open, FIG. 12 (c) is a top view with the lid closed, and FIG. 12 (d). FIG. 4 is a diagram showing a state where authentication is performed by presenting a finger.

  In the apparatus shown in this embodiment, the lid 133 and the finger rest 135 are connected by the connection portion 131, and the device can be folded using the connection portion 131 as a fulcrum. The light source 3 is installed on the lid 133. Similar to the cellular phone terminal 2 described with reference to FIG. 3, the finger rest has an opening 24 smaller than the finger.

  When the authentication device is not used, the lid is closed as shown in FIG. 12A to prevent dust and garbage from entering the device. In addition, the apparatus can be thinned. At the time of authentication, the lid 133 is opened as shown in FIG. The operation of opening the lid may be performed manually by the user, or may be detected by using an infrared sensor or the like to detect that the finger is approaching, and may be electrically opened using a motor.

  When the lid 133 is opened, the light source 3 is turned on and authentication is started. As shown in FIG. 12B, when the user presents a finger on the finger rest 133, the light emitted from the light source 3 passes through the finger and is captured by the imaging unit 4. Authentication is performed based on the captured image. If it is determined that the user is authorized by the authentication, post-authentication processing such as entrance / exit management and PC login is performed.

  The shape of the lid may be U-shaped as shown in FIG. Thereby, since the space above the finger presentation position becomes open, it is easy to present the finger and a highly convenient device can be realized. In this case, the light source 3 is installed at both ends of the lid. Further, the finger 1 is placed toward the inside of the apparatus so that light is irradiated. The transmitted light of the finger 1 is imaged by the imaging unit 4.

  FIG. 14 shows an example of a small finger vein authentication device that can move the finger rest 133. FIG. 14A is a side view of the authentication apparatus, and FIG. 14B shows a state in which the user presents a finger and performs authentication.

  The finger rest 133 is connected to the main body at the connection portion 131. The finger rest can be moved downward from the position shown in FIG. 14A to the position shown in FIG. 14B with the connecting portion 131 as a fulcrum. In the wall on the fingertip side of the apparatus main body, the light source 3 is installed toward the finger rest. The imaging unit 4 is installed at an angle, and when the finger rest is moved to the position shown in FIG. 14B, the finger rest and the imaging unit 4 are parallel. Further, a push button type switch 151 is installed on the bottom of the apparatus. The switch 151 controls the current of the light source 3 and the imaging unit 4, and the current flows while the switch is pressed, so that authentication can be performed.

  Since the finger rest 133 is supported by a spring 151 installed in the connection portion 131, the finger rest 133 is normally maintained in a horizontal orientation with respect to the lower surface of the apparatus. When performing authentication, the finger rest 133 is pushed into the lower side of the apparatus using the finger to be authenticated. When the finger rest 133 is pushed in until it touches the inner bottom of the apparatus, the switch 151 is pressed and authentication is started. The light emitted from the light source 3 enters the inside of the finger from the back of the finger, and the light transmitted through the finger is photographed by the imaging unit 4. When the authentication is completed and the user releases the finger, the finger rest 133 returns to the position (a). As a result, the push button switch is turned off.

  FIG. 15 shows an example in which a finger vein authentication device is incorporated in a slide-type mobile phone terminal. FIG. 15A is a front view of the apparatus, and FIG. 15B is a side view.

  The cellular phone terminal 2 includes a first casing 81 that includes a display and a second casing 83 that includes buttons. When the cellular phone is used, the cellular phone terminal is opened by moving the first casing upward. It is a slide-type portable terminal that can be used.

  The finger vein data acquisition unit 5 is installed on the side surface of the first housing 81. An enlarged view of only the vein data acquisition unit 5 is shown in FIG. As shown in FIG. 16 (a), an opening 24 is installed at the center of the finger rest 133. A plurality of light sources 3 are installed so as to surround the opening 24. The opening 24 and the light source 3 are installed within a range that can be covered with a finger. The user presents a finger on the finger rest 133 so as to hide all the light sources 3 (FIG. 16B). The light emitted from the light source 3 enters the finger from the ventral side of the finger. Thereafter, the light is scattered inside the finger and released to the outside. At this time, the imaging unit 4 can capture light transmitted through the ventral side of the finger. Thereby, the finger vein pattern in the opening can be obtained. Since photographing is performed with the finger and the light source in close contact with each other, the leakage component of the irradiated light is reduced, the light use efficiency is increased, and the deterioration of the image quality due to the influence of the leaked light is reduced. In addition, by arranging a plurality of devices side by side as in the present embodiment, it is possible to irradiate the finger 1 with uniform brightness, and it is possible to capture an image without uneven brightness.

  FIGS. 15C and 15D show how authentication is performed. When the sliding mobile phone is in a closed state, the function of the mobile phone terminal is locked. Authentication is performed when a user uses a mobile phone function such as making a call.

  First, a finger is presented to the vein data acquisition unit 5 with the cellular phone closed as shown in FIG. Next, with the finger 1 fixed, the first housing is pushed up with the thumb and slid. When the slide of the first housing is started, the photographing of the vein image is started. The imaging unit 4 continues to capture the image of the finger 1 until the slide of the first housing stops. The authentication processing unit 6 combines a plurality of captured partial images to create an image of the entire finger. Thereby, a wide range image of a finger can be acquired. Authentication processing is performed using a wide range of finger vein images synthesized. If you can confirm with an authorized user, unlock it. The user can complete the authentication only by performing the same operation as that for starting a normal mobile phone by sliding the mobile terminal.

  FIG. 17 is a system configuration diagram of a security cellular phone system that can prevent information leakage even when a cellular phone terminal is stolen or lost.

  The cellular phone terminal 2 of the present embodiment is provided with the finger vein data acquisition unit 5 having the shape of any one of the first to third embodiments or the ninth embodiment. Moreover, the button 41 for a user to input and the display part 17 for displaying the result from a server are provided.

  When using this system, all information such as address extension and schedule is stored in the host PC, not in the storage area inside the mobile phone terminal. Also, output to an external memory such as an SD card is no longer possible.

  When using a mobile phone terminal, authentication using finger veins is performed. First, a vein image is taken by the vein data acquisition unit. A feature extraction process is performed on the captured image to create authentication data 250. Thereafter, the authentication data 250 is transmitted to the authentication server 171. The verification processing unit 173 of the authentication server compares the transmitted authentication data 250 with the registration data 200 in the registration database 175. If it is determined that the user is an authorized user, communication with the host PC 177 becomes possible. This makes it possible to refer to and change data in the host PC.

  Since no information is stored inside the mobile phone terminal, it is possible to prevent external leakage of information even if the mobile phone terminal is lost or stolen. Even if the mobile phone terminal is changed, if it is determined that the user is an authorized user by the authentication, it is possible to access data in the host PC. In the conventional system, when the mobile phone terminal breaks down, the data inside the terminal is lost. By using this system, even if the mobile phone terminal fails, you can use another mobile phone terminal and Allows access to data.

  The system shown in FIG. 17 is effective for preventing information leakage, but accessing the host PC every time a mobile phone terminal is used requires cost and time. Therefore, information is usually stored in the memory inside the mobile phone terminal, such as when eating or moving, when the mobile phone terminal is not used for a certain period of time, or when the mobile phone terminal is likely to be stolen Only at times may information such as an address book in the mobile phone terminal be temporarily stored in the server.

  When depositing information to the server, registration data 200 is transmitted to the server together with the deposited information. After sending the data, the user erases the information in the mobile phone terminal. As a result, even if the mobile phone terminal is stolen thereafter, the data is not seen.

  Authentication is performed when data is read from the server. When the degree of coincidence between the registration data 200 transmitted in advance and the data photographed at the time of authentication is high, the deposited information can be received.

1 is a schematic diagram of a system configuration of a mobile phone terminal. An example of a mobile phone terminal incorporating a light source into an antenna. An example of the opening part strong against external light. An example of authentication processing executed by the authentication program. Explanatory drawing of the internal process which enables the authentication which accept | permits rough placement. An example of the rotation correction method which aligns the vein pattern from which the image | photographed different angle | corner in a fixed direction. An example of a finger vein authentication device incorporated in a foldable mobile phone terminal. 1 shows a configuration example of a finger vein authentication device in which a light source is incorporated in a button of a mobile phone terminal. An example of embodiment of the vein authentication apparatus which has a light source in a mobile telephone terminal and comprises an imaging device in the reader side. An example of embodiment of the vein authentication apparatus which has an imaging part in a mobile telephone terminal, and comprises a light source in the reader side. An example of a filter detachable mobile phone terminal. An example of the vein authentication apparatus which installed the light source in the movable lid | cover. An example of the vein authentication apparatus which installed the light source in the movable lid | cover. An example of the vein authentication apparatus which installed the movable finger stand. 1 shows a configuration example of a finger vein authentication device incorporated in a slide-type mobile phone. One Example of a vein data acquisition part. Schematic of the structure of a security portable system.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Finger, 2 ... Mobile phone terminal, 3 ... Light source, 4 ... Imaging part, 5 ... Vein data acquisition part, 6 ... Authentication processing part, 7 ... User interface Part, 8 ... audio output device, 11 ... CPU, 12 ... memory, 14 ... storage device, 15 ... display part, 41 ... button, 17 ... display part, 100 ... Authentication program, 200 ... Registration data, 250 ... Authentication data, 26 ... Antenna, 21 ... Indentation for positioning, 24 ... Opening, 27 ... Filter, 31 ..Acrylic plate, 321... Vein, 322... Background, 324... Vector component in the upper right direction, 325... Vector component in the lower right direction, 326. First housing of telephone terminal, 83 ... Second housing of mobile phone terminal, 8 ··· Earpiece, 89 ··· Mouthpiece · ···································· 85 ·············· 91 ..Reading device side wireless communication unit, 310... Reading device, 311... Depression, 312... Contact sensor, 316... Gain controller, 121. ... Lever switch, 128 ... projection shape, 133 ... lid, 131 ... connecting part, 135 ... finger rest, 151 ... push button switch.

Claims (24)

In a mobile terminal including a display unit that displays operation content and a button that allows a user to input,
A light source that emits infrared light;
An imaging unit that captures a vein image of a living body with light from the light source;
An opening that opens in the imaging direction of the imaging unit;
A storage device for storing biological information;
An image calculation unit that performs feature matching between feature extraction from an image captured by the imaging unit and biometric information stored in the storage device;
Positioning means for determining the installation position of the living body to be installed,
The portable terminal characterized in that the positioning means is provided between the light source and the imaging unit.   The mobile phone terminal according to claim 1, wherein the living body is a finger.   The mobile terminal according to claim 1, wherein the mobile terminal further includes an antenna, and the light source is embedded in the antenna.   The portable terminal according to claim 1, further comprising a filter that transmits only infrared light between the living body to be installed and the imaging unit.   The portable terminal according to claim 1 or 2, wherein the filter is detachable.   The portable terminal according to claim 1 or 2, wherein the opening is an opening having a size such that external light is blocked by an installed living body.   The portable terminal according to claim 1, wherein the portable terminal includes means for controlling the intensity of light emitted from the light source.   The portable terminal is a casing configured to fold a first part and a second part, and the positioning means has a connection part between the first part and the second part. The portable terminal according to claim 1 or 2, characterized in that   The mobile terminal, wherein the light source is arranged around the opening.   The portable terminal is a housing configured to fold a first component and a second component, the light source is installed in the first component, the imaging unit is installed in the second component, The imaging unit captures a vein image of a living body by light from the light source irradiated to a living body disposed between the first component and the second component. Item 3. The portable terminal according to Item 1 or 2.   The portable terminal according to claim 10, wherein the light source is disposed so as to sandwich both sides of a living body installed in a positioning unit.   The portable terminal is a housing configured to fold a first component and a second component, the imaging unit is provided in the first component, and the light source is provided in the second component. The imaging unit is installed inside the button, and the imaging unit captures a vein image of the living body by light from the light source irradiated to the living body disposed between the first component and the second component. The mobile terminal according to claim 1, wherein the mobile terminal is a mobile terminal.   The mobile terminal is a slide type mobile terminal in which a first casing having the display screen and a second casing having the button are movably connected in a parallel direction, The mobile terminal according to claim 1, wherein the second housing includes the imaging unit and the light source.   The storage device includes a plurality of pieces of data obtained by performing rotation processing on the captured biological image as the stored biological information, and the image calculation unit includes the image captured by the imaging unit and the plurality of sheets. The mobile terminal according to claim 1, wherein the mobile terminal is collated with the data.   The portable terminal according to claim 1, wherein the image calculation unit includes a unit that performs rotation correction of the captured image of the living body.   The mobile terminal according to claim 15, wherein the rotation correction unit performs correction to align a vein pattern in a certain direction from a vein image captured by the imaging unit. The mobile terminal according to claim 1, wherein the storage device is removable from the mobile phone terminal. A light source that emits light;
A storage device for storing biological information;
An image calculation unit;
Positioning means for determining the installation position of the living body to be installed;
A portable terminal comprising a first communication means,
A captured biological image is captured from a housing including an imaging unit that captures a vein image of a living body by light from the light source provided in the portable terminal and a second communication unit that communicates with the first communication unit. A portable terminal that receives and collates with biological information stored in the storage device. A storage device for storing biological information;
An imaging unit that captures a vein image of a living body with light from a light source;
An image calculation unit;
A personal authentication device comprising a first communication means,
The imaging unit is positioned by the light emitted from the light source of a portable terminal having a light source, a positioning unit that determines a setting position of a living body to be installed, and a second communication unit that communicates with the first communication unit. A personal authentication apparatus characterized in that it captures a vein image of a living body installed in the means, and the image calculation unit performs personal authentication by collating with biological information stored in the storage device. An imaging unit that captures a vein image of a living body with light from a light source;
A storage device for storing biological information;
Positioning means for determining the installation position of the living body to be installed;
A portable terminal comprising a first communication means,
Captures a vein image of a living body set by the light emitted from the light source of a housing having a light source that emits light and a second communication unit that communicates with the first communication unit, and stores the image in the storage device The portable terminal characterized by collating with the biometric information made. A storage device for storing biological information;
A light source that emits light;
An image calculation unit;
A personal authentication device comprising a first communication means,
The light source includes a positioning unit that determines an installation position of a living body to be installed, an imaging unit that captures a vein image of the living body by light from the light source, and a second communication unit that communicates with the first communication unit. The portable terminal is irradiated with light, and the image calculation unit receives a vein image picked up by the image pickup unit and collates with biometric information stored in the storage device to perform personal authentication. A personal authentication device.   The light source of the light source is provided, and the light amount of the light source is controlled based on a light amount value of the light source and an average luminance value of an image captured by the imaging unit of the portable terminal. 21. The personal authentication device according to item 21. A light source that emits light;
A biological information acquisition unit including an imaging unit that captures an image of a blood vessel of a living body with light from the light source;
An image computing unit that performs feature extraction and feature matching from the captured image;
Installation means for installing the living body operable with the connecting portion as a fulcrum;
In a personal authentication device comprising a switch for controlling the current of the light source and the imaging unit by contact of the installation means,
In the contact state of the installation means, the installation means is located between the light source and the imaging unit. A storage unit for storing biological information;
An authentication server having a verification processing unit,
The collation processing unit receives a vein image of a living body imaged by light from the light source, transmitted from a portable terminal having a light source and an imaging unit, and collation processing with biological information stored in the storage unit An authentication server characterized in that the verification result is transmitted to a second terminal in which information is stored.

Images