WO2008004436A1

WO2008004436A1 - Iris authenticating system

Info

Publication number: WO2008004436A1
Application number: PCT/JP2007/062251
Authority: WO
Inventors: Toshio Tohne; Tsukasa Kobayashi
Original assignee: Oki Electric Industry Co., Ltd.
Priority date: 2006-07-07
Filing date: 2007-06-18
Publication date: 2008-01-10
Also published as: JP2008015884A

Abstract

An iris authenticating system is provided with a mobile terminal device having an image pickup unit for picking up an eye image of a user to acquire image information and an authenticating device for checking an iris code generated from the image information with a registered iris code to authenticate the person himself or herself, wherein the mobile terminal device is comprised of a moving detection unit for detecting whether or not he or she stands still to output a detecting signal, a standstill judging unit for judging whether or not he or she stands still in accordance with the detecting signal, an operation control for enabling the image pickup unit to operate in the case of the judgment that he or she stands still, a distance measuring device for measuring a distance from him or her to the eye of the user, an audio guidance for guiding the user to come in an effective recognition range when the distance is out of the effective recognition range necessary for the personal authentication to maintain the distance for acquisition of effective image information and a transmitting unit for transmitting the image information to the authenticating device when the distance is within the effective recognition range.

Description

Specification

Iris authentication system

Technical field

The present invention relates to an iris authentication system that uses an iris as a biometric feature, and more particularly to guidance guidance when an iris image used in the system is captured by a camera. Background art

Conventionally, an iris authentication system using an image of an iris part of an eye has been proposed as an individual identification system using a biometric feature. This iris authentication system captures the vicinity of the eyes of a living organism such as a human being with a camera, cuts out the iris from the captured image, obtains an iris image, encodes the feature pattern of the iris image, and codes the iris code. , And compares the iris code with a pre-registered registered iris code to authenticate the person.

[0003] When an eye image is taken, an autofocus camera can be used to focus on the distance between the user and the camera. For this reason, it is not necessary to focus when changing the distance from the camera to the user, and the burden on the user is reduced.

[0004] However, when the iris code is collated in the iris authentication system, the size of the captured iris image greatly affects the success rate of identity authentication, that is, the recognition rate indicating the rate of recognizing the identity. That is, when an iris image is taken with a small size, the resolution is lowered, and as a result, the recognition rate is lowered. In addition, if an excessive image is captured only near the eye, a part of the iris may not be included in the captured image, and a part of the iris information may be lost. I can't get the iris code.

Therefore, in order to prevent the recognition rate from decreasing and the loss of iris information, it is necessary to acquire an iris image of an appropriate size. To do this, the user's iris must be photographed while keeping the distance between the user and the camera within a certain range.

[0005] By the way, a range in which the distance between the user and the camera is limited in order to acquire an iris image effective for personal authentication is called a recognition effective area.

In Japanese Patent Laid-Open No. 2000-259817, as a method for guiding the user to be within the effective distance recognition area from the camera to the user, the user's position is determined and the user is recognized. An iris authentication system has been proposed that outputs audio information that guides the user to be within the effective range.

Disclosure of the invention

Problems to be solved by the invention

However, in the guidance guidance using voice information disclosed in Japanese Patent Application Laid-Open No. 2000-259817, voice guidance is performed while the user is guided in a certain direction (for example, a direction approaching the camera). Is output. For this reason, the same voice guidance (for example, move closer to the camera) was repeatedly output, and the guidance guidance was not obtained for the user.

[0007] When the voice guidance is output at regular time intervals, the next voice guidance may not be output when the user finishes moving according to the voice guidance. At this time, since the user is in a situation where there is no voice guidance and is confused as to whether or not he / she should move next, he / she cannot perform the next action promptly. After all, there was a problem that it took a long time to guide users.

Therefore, an object of the present invention is to provide an iris authentication system that can guide a user in a timely manner using voice guidance.

Means for solving the problem

The present invention adopts the following modes in order to solve the above points.

A portable terminal having a photographing unit for photographing a user's eye image and acquiring image information is compared with a portable terminal force, received image information force, a generated iris code and a registered iris code registered in advance. An iris authentication system including an authentication device that performs personal authentication,

A motion detection unit that detects whether the mobile terminal is stationary and outputs a detection signal; a stationary determination unit that determines whether the mobile terminal is stationary based on the detection signal; Distance measurement that measures the distance between the operation control unit that activates the imaging unit when the stop determination unit is stationary and the user's eyes from the portable terminal based on the image information acquired by the imaging unit And the distance measured by the distance measurement unit Must be maintained in order to obtain! /, If it is outside the recognition effective range, a voice output unit that outputs voice guidance to guide the user so that the distance is within the recognition effective range, and distance measurement A transmission unit that transmits image information acquired by the imaging unit to the authentication device when the distance measured by the unit is within the recognition effective range.

A stationary terminal having a photographing unit that captures a user's eye image and obtains image information is compared with an iris code generated from image information received from the stationary terminal and a registered iris code registered in advance. An iris authentication system including an authentication device for authenticating an individual, and a stationary terminal,

A motion detection unit that detects whether the user is stationary and outputs a detection signal, a stationary determination unit that determines whether the user is stationary based on the detection signal, and a stationary determination unit An operation control unit that activates the imaging unit when it is determined to be stationary, a distance measurement unit that measures the distance between the stationary terminal and the user's eye based on image information acquired by the imaging unit; If the distance measured by the distance measurement unit is outside the effective recognition range that must be maintained in order to acquire image information that is valid for identity authentication, the user is guided so that the distance is within the effective recognition range. A voice output unit that outputs a voice guidance for transmitting the image information, and a transmission unit that transmits image information acquired by the imaging unit to the authentication device when the distance measured by the distance measurement unit is within the effective recognition range. .

The invention's effect

According to the iris authentication system of the present invention, a mobile terminal having an imaging unit that captures an eye image detects a presence / absence of its own stillness and outputs a detection signal, and based on the detection signal, the mobile terminal A stationary determination unit that determines whether the camera is stationary, an operation control unit that activates the imaging unit when the stationary determination unit determines that the mobile terminal is stationary, and the imaging unit. A distance measurement unit that measures the distance from the mobile terminal to the user's eye (iris) based on the acquired image information, and the distance measured by the distance measurement unit acquires image information that is effective for personal authentication. And a voice output unit that outputs voice guidance for guiding the user so that the distance falls within the effective recognition range when the distance is out of the effective recognition range. The mobile phone is determined by the stationary determination unit. When it is determined that the terminal is stationary, the voice output unit outputs voice guidance and guides the user so that the distance between the portable terminal and the user's eyes is within the effective recognition range. . Thus, the user can be guided in a timely manner using voice guidance. Brief Description of Drawings

FIG. 1 is a configuration diagram of an iris authentication system according to a first embodiment.

FIG. 2 is a diagram showing a relationship between a camera movement range and a recognition effective range at the time of photographing an eye image.

FIG. 3 is a flowchart of the iris authentication system of the first embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION

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

Example 1

FIG. 1 is a configuration diagram of the iris authentication system 10.

The iris authentication system 10 of the first embodiment captures an eye image of a user and acquires image information, and extracts an iris portion from the image information acquired by the portable camera 100 and the image information acquired by the portable camera 100. A collation terminal 200 is provided that generates an iris code indicating a feature pattern, collates the generated iris code with a registered iris code registered in advance, and authenticates the user. The portable camera 100 and the verification terminal 200 are connected via a wireless communication line 300 so that they can communicate with each other.

[0014] The iris authentication system 10 operates in either the registration mode or the verification mode. In the registration mode, a portable camera 100 is used to capture a user's eye image, acquire image information, and register the iris code that also generated the image information power as a registration iris code in the verification terminal 200. This is the operation mode that is used. The collation mode is an operation mode used when the user needs to authenticate the user, and shows a feature pattern of an iris image generated from image information obtained by capturing an eye image with the portable camera 100. This is an operation mode used when authenticating a person by comparing an iris code with a registered iris code registered in advance.

[0015] The portable camera 100 includes an operation unit 101 that performs a designation input for a user to designate an operation mode, a photographing unit 102 that captures a user's eye image and outputs an image signal, and a photographing unit 102. An image storage unit 103 that temporarily stores image information based on the output image signal; A motion detection unit 104 that detects the movement of the portable camera 100, a stationary determination unit 105 that determines whether or not the portable camera 100 is stationary, and from the user's eyes (iris) to the portable camera 100 A distance measurement unit 106 that measures the distance and a voice guidance output unit 107 that outputs voice guidance to guide the user to correct the distance to the portable camera 100 with the user's eye (iris) power A communication interface 108 for wirelessly communicating with the terminal 200, a control unit 109 that controls and controls each unit, and an antenna 110 for wirelessly communicating with the verification terminal 200 are provided.

[0016] When the operation unit 101 receives a designation input for designating the operation mode of the iris authentication system 10, the operation unit 101 outputs an operation mode signal indicating the designated operation mode to a temporary storage unit (not shown). , Keep it there temporarily.

In this embodiment, an example in which the iris authentication system 10 operates in the collation mode when the user inputs designation for designating the collation mode to the operation unit 101 will be described below.

[0017] The motion detection unit 104 has a structure in which a minute beam and an inertial mass are formed on a silicon substrate, and a piezoresistor serving as a strain gauge is formed thereon. When the force (acceleration) is applied, the beam stiffens, and thus the resistance value of the piezoresistor changes, and the change width of the resistance value is proportional to the magnitude of the force (acceleration). The movement of the portable camera 100 is detected based on the change width. When the movement detection unit 104 detects the movement of the portable camera 100 in this manner, the movement detection unit 104 outputs a detection signal to the stationary determination unit 105.

[0018] Upon receiving the detection signal from the motion detection unit 104, the stationary determination unit 105 determines whether or not the portable camera 100 is stationary based on the detection signal. The stationary determination unit 105 determines that the portable camera 100 is stationary when the value indicated by the detection signal is equal to or smaller than a predetermined threshold, and the portable type when the value indicated by the detection signal is greater than the threshold. Judge that camera 100 is moving. The stillness determination unit 105 outputs to the control unit 109 a still signal indicating whether or not it is still as a determination result.

When control unit 109 receives a stationary signal indicating that portable camera 100 is stationary from stationary determination unit 105, control unit 109 transmits a photographing instruction signal to photographing unit 102.

[0020] The photographing unit 102 has an autofocus function, and upon receiving a photographing instruction signal from the control unit 109, the photographing unit 102 photographs the user's eyes (iris), and the image signal obtained by the photographing is recorded as an image. Store in the memory 103. When the image capturing unit 102 finishes storing the image signal in the image storage unit, the image capturing unit 102 sends an image capturing completion signal to the control unit 109.

When control unit 109 receives a shooting completion signal from shooting unit 102, control unit 109 sends a read signal to image storage unit 103.

The image storage unit 103 temporarily stores image information including an iris for one frame based on the image signal output from the imaging unit 102. When receiving the read signal from the control unit 109, the image storage unit 103 outputs the temporarily stored image information for one frame to the distance measurement unit 106.

The distance measurement unit 106 includes an eye position detection unit 1061, an iris diameter measurement unit 1062, a shooting distance data storage unit 1063, and a distance determination unit 1064. The eye position detection unit 1061 detects the eye position based on the image information. The iris diameter measuring unit 1062 measures the iris diameter r of the eye in the iris image. The shooting distance data storage unit 1063 stores shooting distance data indicating the correspondence between the iris diameter r and the distance D from the portable camera 100 to the iris in the real space. The distance determination unit 1064 determines the distance D corresponding to the value of r indicated by the iris diameter information, and determines whether the distance D is within a predetermined range. Image information from the image storage unit 103 is supplied to the eye position detection unit 1061.

[0024] Upon receiving image information for one frame, the eye position detection unit 1061 detects an eye center position in an iris image obtained by cutting out an iris part based on the image information, and an eye position indicating the eye center position The information is output to the iris diameter measuring unit 1062.

[0025] When the iris diameter measuring unit 1062 receives the eye position information from the eye position detecting unit 1061, the iris diameter measuring unit 1062 has a radius around the eye position coordinates (xO, yO) indicated by the eye position information! The process of calculating the average luminance value Ca (r) of the pixels on the circumference and the average luminance value Cb (r) of the pixels on the circumference of the second circle of the radius (r + α) To obtain the value of r when Cb (r) -Ca (r) reaches the maximum value, and obtain iris diameter information indicating the value of r.

[0026] The shooting distance data storage unit 1063 shows the correspondence between the iris diameter rl, r2, ... in the real space and the distance Dl, D2, ... between the eye (iris) and the portable camera 100. Memorize shooting distance data. The photographing distance data is acquired by photographing the iris diameter r model by changing the distance D between the iris diameter r model and the portable camera 100 in the real space. That is, the iris diameter r I also photographed Dell at various distances (Dl, D2, D3, ···), and obtained the iris diameter rl in the image taken from the distance D1, and similarly, the iris diameter in the image taken from the distance D2. After obtaining r2 and the iris diameter r3 in the image photographed from the distance D3, ..., the photographing distance data is the distance (D1, D2, D3, '' and the iris diameter 0: 1 2, 3 , ····) and is obtained in a table format.

[0027] Upon receiving the iris diameter information from the iris diameter measuring unit 1062, the distance determining unit 1064 refers to the shooting distance data stored in the shooting distance data storage unit 1063 to indicate the iris diameter information! Determine the distance D corresponding to the value. The distance determination unit 1064 determines whether or not the distance D is within a predetermined range, and outputs a recognition valid signal to the control unit 109 when the distance D is within the predetermined range. The distance determination unit 1064 outputs a position correction signal for correcting the position of the portable camera 100 to the voice guidance output unit 107 when the distance D is outside the predetermined range.

[0028] By the way, from the user's eye (iris) to the portable camera 100 in order to capture the user's iris into an appropriately sized image, that is, to obtain image information effective for personal authentication. The distance D must be kept within the prescribed range. The range of distance D at this time is called the recognition effective range.

Accordingly, the distance determination unit 1064 holds the recognition effective range data and determines whether or not the distance D is within a predetermined range. That is, it is determined whether or not the distance D from the user's eye (iris) to the portable camera 100 is within the recognition effective range that must be maintained in order to acquire image information effective for personal authentication. The recognition valid signal is output.

[0029] When control unit 109 receives the recognition valid signal from distance determination unit 1064, control unit 109 sets these storage units to transmit the operation mode signal of the temporary storage unit and the image information of image storage unit 103 to verification terminal 200. Control output. Accordingly, the operation mode signal held in the temporary storage unit (not shown) and the image information held in the image storage unit 103 are output to the communication interface 108 from each storage unit.

[0030] Upon receiving the position correction signal from the distance determination unit 1064, the voice guidance output unit 107 recognizes the user's eye (iris) power and the distance D to the portable camera 100 based on the position correction signal. Select voice guidance to guide users to stay within range Select. The voice guidance output unit 107 outputs the selected voice guidance from a speaker (not shown).

When the distance D is far outside the effective recognition range, the voice guidance output unit 107 outputs guidance guidance to correct the position of the far power camera. For example, voice guidance such as “Make the camera closer! /,” Is output.

Conversely, when the distance D is close outside the effective recognition range, the voice guidance output unit 107 outputs guidance guidance to correct the position of the near camera. For example, voice guidance such as “Please move your camera further! /,” Is output.

The communication interface 108 performs wireless communication with the verification terminal 200 via the wireless communication line 300.

When the communication interface 108 receives an operation mode signal from a temporary storage unit (not shown) and image information from the image storage unit 103 as a transmission signal to the verification terminal 200, the communication interface 108 performs phase modulation on the radio carrier wave by the transmission signal. A radio transmission wave is obtained, the power of the radio transmission wave is amplified to a predetermined level, and then the amplified radio transmission wave is output to the antenna 110. The radio transmission wave is radiated from the antenna 110 as a radio wave.

The verification terminal 200 includes a registered iris information holding unit 201, a verification unit 202, a display unit 203, a communication unit 204, and an antenna 205. The registered iris information holding unit 201 holds a registered iris code registered in advance. The collation unit 202 performs personal authentication by collating an iris code generated from image information acquired by photographing with a registered iris code registered in advance. The display unit 203 displays the collation result. The communication unit 204 and the antenna 205 are provided for wireless communication with the portable camera 100.

[0033] Upon receiving the iris code associated with the user ID from the collation unit 202, the registered iris information holding unit 201 holds the iris code as a registered iris code so as to be searchable by the user ID.

[0034] When the collation unit 202 receives an operation mode signal indicating the collation mode and image information for one frame from the portable camera 100, the feature of the iris image obtained by cutting out the iris portion from the image information by image processing technology Encode the pattern and generate an iris code. The collation unit 202 then reads out the registered iris code held in the registered iris information holding unit 201. Then, the registered iris code is collated with the generated iris code. As a result, the collation unit 202 performs personal authentication and outputs authentication information indicating the authentication result to the display unit 203.

In the registration mode, the collation unit 202 outputs the generated iris code to the registration iris information holding unit 201 and causes the registration iris information holding unit 201 to hold the iris code in association with the user ID.

[0035] Upon receiving the authentication information from the collation unit 202, the display unit 203 displays the authentication result based on the authentication information!

The communication unit 204 performs wireless communication with the portable camera 100 via the wireless communication line 300.

When the communication unit 204 acquires the received signal from the antenna 205 that has received the radio wave from the portable camera 100, the communication unit 204 first amplifies the received signal with a low-noise amplifier, and converts the received signal to an intermediate frequency using a mixer. To do. Next, after removing unnecessary waves contained in the received signal by a filter, the received signal is amplified by a high gain amplifier and demodulated to obtain an operation mode signal and image information. The acquired operation mode signal and image information are output to the collation unit 202.

FIG. 2 is a diagram showing the relationship between the camera movement range and the recognition effective range at the time of capturing an eye image.

FIG. 3 is a flowchart of the iris authentication system of the first embodiment. The operation of the iris authentication system of the first embodiment will be described with reference to FIGS.

When user 11 uses the portable camera 12 to capture an eye image, the distance D from the portable camera 12 to the eye (iris) of the user 11 is recognized in order to acquire image information that is effective for personal authentication. An operation example for guiding the user until the effective range 16 is entered will be described.

As shown in FIG. 2, the user 11 moves the portable camera 12 within the camera movement range 14 according to the guidance guidance so that the distance D falls within the recognition effective range 16.

[0038] The motion detection unit 104 detects the motion of the portable camera 12, and outputs a detection signal indicating the motion to the stationary determination unit 105 (step S301). When receiving the detection signal from the motion detection unit 104, the stationary determination unit 105 determines whether or not the portable camera 100 is stationary based on the detection signal (step S302). If the portable camera 12 is moved, the process returns to step S301. If the portable camera 12 is stationary, the process proceeds to step S303.

The distance measuring unit 106 measures the distance D from the portable camera 12 to the user's eyes (iris). (Step S303), it is determined whether or not the distance D is within the recognition effective range 16 (Step S304). If it is determined that the distance D is outside the effective recognition range 16, the process proceeds to step S305. If it is determined that the distance D is within the effective recognition range 16, the process proceeds to step S308.

[0039] The distance measuring unit 106 determines whether or not the distance D measured in step S303 exceeds the recognition effective range 16 (step S305). When the distance D is far beyond the effective recognition range 16, the distance measuring unit 106 outputs a position correction signal indicating that the portable camera 12 is too far to the voice guidance output unit 107. When receiving the position correction signal, the voice guidance output unit 107 outputs guidance guidance to correct the position of the far camera (step S306). For example, it outputs sound such as “Make the camera closer”.

When the distance measuring unit 106 determines that the distance D is close outside the recognition effective range 16, the distance measuring unit 106 outputs a position correction signal indicating that the portable camera 12 is close to the voice guidance output unit 107. When the voice guidance output unit 107 receives the position correction signal, the voice guidance output unit 107 outputs guidance guidance to correct the position of the near camera (step S307). For example, it outputs audio such as “Please move your camera further”.

The voice guidance output unit 107 outputs guidance guidance to guide the user 11, and the step from step S301 is performed until the distance D from the portable camera 12 to the user's eyes (iris) is within the recognition effective range 16. The processing up to S307 is repeated.

[0041] After that, in step S304, if the distance measuring unit 106 determines that the distance D measured in step S303 is within the recognition effective range, the portable camera 100 uses the photographing unit 102 to determine the user 11's An eye image is taken, image information including the iris is acquired, and the image storage unit 103 〖is temporarily stored. Then, the image data for one frame and the operation mode signal temporarily stored in the temporary storage unit (not shown) are transmitted to the verification terminal 200 (step S308). When the collation unit 200 receives the operation mode signal from the portable camera 100 and image information for one frame from the collation unit 202, the collation terminal 200 generates an iris code indicating the feature pattern of the iris image obtained by cutting out the image information power iris portion. . Next, the verification terminal 200 reads out the registered iris code from the registered iris information holding unit 201, verifies the registered iris code and the generated iris code, authenticates the person, and the display unit 203 authenticates the authentication. The result is displayed (step S309). In the above description, an example in which the portable camera 100 is used has been described. However, the present invention is not limited to this, and a stationary camera may be employed as a camera that captures a user's eye image.

In that case, the iris authentication system generates two iris images from an image storage unit that holds image information of a plurality of frames taken by a stationary camera and two pieces of image information that are continuous in time series, and A motion detection unit that compares two iris images and outputs a detection signal indicating the comparison difference, and a motion detection unit force A stillness determination unit that determines a user's motion based on the magnitude of the output detection signal You may want to have ヽ.

In the above description, an example in which data is transmitted and received between the portable camera 100 and the verification terminal 200 via the wireless communication line 300 has been described. However, the present invention is not limited to this, and when applied to a portable camera incorporating a collation unit and a registered iris information holding unit, a system configuration in which collation processing is realized in the terminal can be employed.

[0043] According to the iris authentication system 10 of the first embodiment, the portable camera 100 that captures the user's eye image includes a motion detection unit 104 that detects whether the portable camera is stationary and outputs a detection signal. Based on the detection output of the motion detection unit 104, the stationary determination unit 105 that determines whether or not the portable camera is stationary, and the stationary determination unit 105 determines that the portable camera is stationary. The photographing unit 102 for acquiring image information, the distance measuring unit 106 for measuring the distance between the portable camera and the user's eye based on the image information, and the distance measured by the distance measuring unit 106 Audio that outputs audio guidance to guide the user so that the distance is within the recognition effective range if it is outside the recognition effective range that must be maintained to acquire image information effective for authentication And a guidance output unit 107. When it is determined by the stationary determination unit 105 that the portable camera is stationary, the voice guidance output unit 107 outputs a voice guidance to the user who decides the next action, and the distance is within the recognition effective range. Guide in a timely manner to be inside. As a result, the user can be guided in a good manner using voice guidance.

[0044] According to the above voice guidance, the guidance guidance that does not repeat the same guidance guidance is interrupted, and the user does not get lost in judgment. This guides the user in a proper manner, makes it possible to determine in a timely manner how the user should move the portable camera 100, and shortens the time required to guide the user. . [0045] Some portable cameras that capture an eye image include a display screen that displays an eye image, and the portable camera displays an eye image when capturing an eye image. It is guiding. However, when the display screen of a portable camera is used outdoors, it is often difficult to see due to the reflection of light. On the other hand, the voice guidance of the portable camera 100 can effectively guide the user by voice regardless of the screen display. That is, the voice guidance according to the present invention can guide the next action when the user who has acted according to the voice guidance that opens the user from the hard-to-see display screen and is frustrating stops.

Explanation of symbols

[0046] 10 Iris authentication system

100 portable camera

101 Operation section

102 Shooting unit

103 Image storage

104 Motion detector

105 Stationary judgment part

106 Distance measurement unit

1061 Eye position detector

1062 Iris diameter measurement unit

1063 Shooting distance data storage

1064 Distance judgment part

107 Voice guidance output section

108 Communication interface

109 Control unit

110 Antenna

200 verification terminal

201 Registered iris information holding part

202 Verification unit 203 Display unit 204 Communication unit 205 Antenna 300 Wireless communication line

Claims

The scope of the claims

[1] A portable terminal having a photographing unit for photographing a user's eye image and obtaining image information;

An authentication device for performing personal authentication by comparing an iris code generated from the received image information with a registered iris code registered in advance;

An iris authentication system with

The portable terminal is

A motion detection unit that detects whether the mobile terminal is stationary and outputs a detection signal; a stationary determination unit that determines whether the mobile terminal is stationary based on the detection signal;

An operation control unit that activates the imaging unit when the stationary determination unit determines to stand still!

A distance measuring unit that measures a distance between the mobile terminal and a user's eye based on the image information acquired by the imaging unit;

If the distance measured by the distance measuring unit is outside the recognition effective range that must be maintained in order to acquire image information effective for personal authentication, the user is set so that the distance falls within the recognition effective range. A voice output unit that outputs voice guidance for guidance; and when the distance measured by the distance measurement unit is within the effective recognition range, image information acquired by the photographing unit is transmitted to the authentication device. A transmission unit;

Including iris authentication system.

[2] The portable terminal is a portable camera,

The iris authentication system according to claim 1, wherein the motion detection unit is an acceleration sensor built in the portable camera.

[3] A stationary terminal having a photographing unit for photographing a user's eye image and acquiring image information, an iris code generated from the received terminal information, and a registered iris code registered in advance. An authentication device that verifies and authenticates

An iris authentication system with

The stationary terminal is

A motion detector that detects whether the user is stationary and outputs a detection signal; A stationary determination unit that determines whether or not the user is stationary based on the detection signal, and an operation control unit that activates the photographing unit when the stationary determination unit determines that it is stationary! When,

A distance measuring unit that measures a distance between the stationary terminal and a user's eye based on the image information acquired by the imaging unit;

Including iris authentication system.

The stationary terminal is a stationary camera, and includes an image storage unit that holds image information of a plurality of frames taken;

The motion detection unit generates two iris images that are continuous in time series from image information of a plurality of frames taken by a user, compares the two iris images, and detects a difference between the comparisons. The iris authentication system according to claim 3, wherein