JP2009211370A - Iris authentication apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To automatically register a more favorable eye image by preventing displacement or the like of a registered image when a user images the eye and registers the eye image as data in advance. <P>SOLUTION: In order to register iris data, a camera 42a is moved close to the front of his/her own eye to position the eye and starts photography. while registering a user, an iris circle/pupil circle extraction part 47 successively extracts an iris circle and a pupil circle from an eye image captured by an image capture part 44, and under control of a control part 45, the iris circle and the pupil circle are superimposed with the eye image and the superimposed image is successively displayed on a display screen 46a. Thereby, the user is guided to a suitable photographing position. After completing the guide of the user, a stillness decision part 48 automatically detects whether the iris circle and the pupil circle are stable or not and the user is notified of the start of photography by a display screen 46a or a speaker 32 controlled by the control part 45. Then, a shutter is automatically driven under the control of the control part 45 to photograph an iris image suited to registration. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is an iris authentication apparatus that authenticates an individual using an iris of an eye, which is a biological feature of an individual such as a person or an animal, and in particular, a user captures an eye image and registers data in advance. In this case, the present invention relates to a technique that prevents registration image misalignment and the like, and can automatically register a better eye image (that is, an eye image).

  Conventionally, a fixed iris authentication device using an image of an iris portion of a human eye is disclosed in the following Patent Document 1 and the like, and a portable iris authentication device is disclosed in the following Patent Documents 2 to 4 and the like. .

Japanese Patent No. 3307936 JP 2005-292542 A JP 2005-327161 A Japanese Patent Laid-Open No. 2008-15588

  As described in Patent Documents 1 to 4 and the like, the conventional iris authentication device acquires an eye image in a user's living body with a camera, cuts out an iris portion from the acquired eye image, and generates iris data. Is extracted, and when the user's iris data registered in advance is matched, the user is authenticated as the user.

  FIGS. 7A and 7B are schematic configuration diagrams showing a conventional portable iris authentication device described in Patent Documents 2 to 4 and the like. FIG. 7A is an external view of the portable iris authentication device. The figure and the figure (b) are the block diagrams of the iris authentication apparatus main body in the figure (a).

  The portable iris authentication device 10 is a device mounted on a mobile phone that is a mobile terminal device, and includes a housing unit 11. An iris authentication device body 20 is provided inside the housing unit 11. . A camera 22 a of the photographing unit 22, an illumination light source 23 a of the illumination unit 23, a display screen 25 a of the display unit 25, and the like are provided on the rear surface outside the housing unit 11. The illumination light source 23a shoots the eyes with the camera 22a and irradiates the eyes with light when acquiring an image of the eyes. Operate to shoot the eyes.

  The iris authentication apparatus main body 20 in the housing unit 11 includes an input unit 21 having a shooting start key and the like, a shooting unit 22 having a camera 22a, an illumination unit 23 having an illumination light source 23a, and an eye image acquired by the shooting unit 22. The image capturing unit 24 captures (captures) a display unit 25 having a display screen 25a, an iris recognition unit 26, an iris recognition dictionary 27, and the like.

In the portable iris authentication apparatus 10, the authentication process is performed as follows.
The photographing unit 22 operates the lens, shutter, and the like of the camera 22a to photograph the eyes of the user who is a subject located in front of the camera 22a. The illumination unit 23 illuminates the user's face by causing the illumination light source 23a to emit light in synchronization with the timing at which the imaging unit 22 captures the eyes.

  The eye image captured by the imaging unit 22 is captured by the image capture unit 24, and the image data is displayed on the display screen 25 a of the display unit 25 and is also sent to the iris recognition unit 26. The iris recognition unit 26 extracts the iris data from the eye image captured by the image capture unit 24 and compares it with the iris data stored and registered in advance in the iris recognition dictionary 26 to determine whether the user is the user. recognize.

  In the conventional iris authentication apparatus 10, in the above authentication process, the user himself / herself takes a photograph of the eye and authenticates it. However, when registering iris data, it is common for a skilled operator to perform registration using the iris authentication device 10 or a dedicated terminal device from the viewpoint of management of registration data and the necessity of determining whether the captured image is good or bad. Therefore, the user himself did not perform the registration work.

  However, in the future, for example, with the diversification of usage methods of mobile terminal devices and the like, the user himself will acquire eye images and register iris data using the iris authentication device 10 mounted on the mobile terminal device. It is envisaged to do. In this case, it is considered that the following two problems (1) and (2) occur in the registration work.

(1) Guidance to an appropriate shooting position Conventionally, when a skilled operator registers an iris, it is possible to determine whether the shooting position is appropriate only by looking at the shot eye image. The person cannot judge that by looking at the eye image. For this reason, an iris photographed at a photographing position unsuitable for registration may be registered.

(2) Eye condition at the time of shooting It is desirable that the iris image to be registered should be widened as much as possible, and most of the iris is reflected in the eye image. Is often forgotten, and as a result, images that are not suitable for registration may be registered.

  For the above reasons, if an eye image that is not suitable for registration is registered, misrecognition, unrecognition, and the like frequently occur during recognition.

  The iris authentication apparatus according to the present invention illuminates the eyes of the individual based on the illumination means for irradiating light to the eyes of the individual and the first control signal when registering the iris data of the eyes. An eye image is acquired, and at the time of authentication of the iris data of the eye, based on a shooting start signal, the eye that has been irradiated with the light is imaged to obtain a second eye image, and acquired by the imaging unit Extraction means for sequentially extracting iris circles and pupil circles from the plurality of first eye images, and the sequentially extracted iris circle and pupil circles based on the second control signal, the plurality of first acquired Display means for displaying each of the eye images on the display screen, registration means for registering the iris data, and positions of the iris circle and the pupil circle corresponding to the plurality of acquired first eye images And monitor the variation in size, and A determination means for determining whether or not the amount is smaller than a predetermined amount, and when the registration is performed, the second control signal is output to control the display means, and the determination result is “smaller than a predetermined amount”. Comprises control means for outputting the first control signal to control the photographing means, and recognition means.

  The recognizing unit extracts the iris data from the acquired first eye image corresponding to the determination result, registers the extracted iris data using the registration unit, and acquires the second eye acquired by the photographing unit during the authentication. Iris data is extracted from the image, and the second eye image is recognized by comparing the extracted iris data with the iris data registered by the registration means.

  Another iris authentication apparatus according to the present invention illuminates an eye irradiated with light based on a lighting unit that emits light to an individual's eyes and a first control signal when registering iris data of the eyes. Imaging means for acquiring the first eye image and acquiring the second eye image by capturing the eye irradiated with the light based on the imaging start signal when the iris data of the eye is authenticated; Capture means for capturing the first and second eye images, extraction means for sequentially extracting iris circles and pupil circles from the plurality of captured first eye images, and the sequential control based on the second control signal. Display means for displaying the extracted iris circle and pupil circle on the display screen so as to overlap each of the plurality of acquired first eye images, registration means for registering the iris data, and the plurality of captured images Against the first eye image of Monitoring the variation of the position and size of the iris circle and pupil circle, determining means for determining whether the variation is smaller than a predetermined amount, and outputting the second control signal during the registration. Control means for controlling the imaging means by outputting the first control signal when the determination result is “smaller than a predetermined amount”, and a recognition means. ing.

  The recognizing unit extracts the iris data from the captured first eye image corresponding to the determination result, registers the extracted iris data by the registration unit, and extracts the iris data from the captured second eye image during the authentication. Iris data is extracted, and the second eye image is recognized by comparing the extracted iris data with the iris data registered by the registration means.

  According to the present invention, the position of the iris circle and the pupil circle displayed on the display screen is always superimposed on the actual eye image by the control of the control means, so that the user can correctly position the eye. It is possible to grasp intuitively whether it is positioned. In addition, since the determination unit detects that the iris position is stable and instructs the photographing unit to shoot the registered image, the registration eye image is shot. The iris is photographed. As a result, even users who are not skilled in registration register iris data from an ideal eye image. As a result, the accuracy of iris recognition processing is improved.

  The best mode for carrying out the invention will become apparent from the following description of the preferred embodiments when read in conjunction with the accompanying drawings. However, the drawings are only for explanation and do not limit the scope of the present invention.

(Configuration of Example 1)
FIGS. 1A and 1B are schematic configuration diagrams of a portable iris authentication device showing a first embodiment of the present invention. FIG. 1A is an external view of the portable iris authentication device, and FIG. FIG. 2B is a configuration diagram of the iris authentication apparatus main body in FIG.

  The portable iris authentication device 30 of the first embodiment is for solving the conventional problems (1) and (2), and as shown in FIG. A device that is mounted on a telephone and authenticates the human iris, and has a casing 31. An iris authentication device main body 40 as shown in FIG. 1B is provided inside the housing unit 31. On the front side (i.e., the front side) of the housing 31, an audio generating means (for example, a speaker) 32, a camera 42 a including a lens and a shutter, an illumination light source 43 a that generates light, a liquid crystal, and the like A display screen 46a, an input unit 41 having a shooting start key (not shown), and the like are provided.

  The iris authentication apparatus main body 40 provided in the housing unit 31 includes an imaging unit (for example, an imaging unit) 42 connected to an input unit 41, and the imaging unit 42 includes an illumination unit (for example, an illumination unit). 43 and a capture means (for example, an image capture unit) 44 are connected. The photographing unit 42 includes a camera 42a, operates the lens, shutter, and the like of the camera 42a to photograph the eye that is a subject located in front of the camera 42a (when registering, the first eye image, It has a function of acquiring the second eye image) at the time of authentication. The illuminating unit 43 includes an illumination light source 43a, and has a function of causing the light source 43a to emit light and irradiating light to the eye in synchronization with the timing of photographing the eye by the photographing unit 42. The image capture unit 44 includes a storage unit such as a memory, and captures the eye image acquired by the imaging unit 42. The image capture unit 44 includes a speaker 32 and a display via a control unit (for example, a control unit) 45. A means (for example, a display unit) 46 is connected, and an extracting unit (for example, an iris circle / pupil circle extracting unit) 47 is connected.

  The speaker 32 generates sound under the control of the control unit 45. The display unit 46 has a display screen 46a and displays an eye image or the like on the display screen 46a. The iris circle / pupil circle extraction unit 47 has a function of sequentially extracting the iris circle / pupil circle from the eye image captured by the image capture unit 44. A control unit 45 is connected to the speaker 32, the display unit 46, and the iris circle / pupil circle extraction unit 47. When the user's iris is registered, the control unit 45 outputs a second control signal to control the display unit 46, and the iris circle / pupil circle extraction result by the iris circle / pupil circle extraction unit 47 is displayed on the display screen 46a. And the first control signal is output to the photographing unit 42 to control the photographing timing of the registered image, the eye is photographed by the camera 42a, and the first eye image is acquired. It has a function to generate sound such as counting of cues.

  The iris circle / pupil circle extraction unit 47 is connected to a determination unit (for example, a static determination unit) 48, and further, a storage unit 49 such as a memory is connected to the static determination unit 48. The stationary determination unit 48 is stable in fluctuations in the position (for example, central coordinates) and size (for example, either radius or diameter) of the iris circle and pupil circle extracted by the iris circle / pupil circle extraction unit 47. (I.e., whether or not the fluctuation is smaller than the fluctuation widths W1 and W2 stored in the storage means 49), and the determination result is given to the control unit 45. It is done. In the case of the determination result that the fluctuation is stable, the control unit 45 controls the photographing timing of the registration screen with respect to the photographing unit 42 by the second control signal.

  The image capturing unit 44 is connected to a recognition unit (for example, an iris recognition unit) 48, and further, a registration unit (for example, an iris recognition dictionary) 49 is connected to the iris recognition unit 48. The iris recognition unit 48 extracts the iris data from the first eye image captured by the image capture unit 44 and registers it in the iris recognition dictionary 49, and the second eye captured by the image capture unit 44 at the time of authentication. It has a function of extracting iris data from an image and comparing the extracted iris data with iris data registered in the iris recognition dictionary 49 to recognize whether or not the user is the user.

  Each component necessary for such an iris authentication function is configured by software incorporated in the iris authentication device body 40 or an individual circuit.

(Operation of Example 1)
2 (a) and 2 (b) are diagrams showing a use state in the portable iris authentication device 30 of FIG. 1. FIG. 2 (a) shows that the user 60 registers and authenticates the iris 61a of the eye 61. FIG. At this time, a side view showing a method of positioning the eye 61 within the photographing range of the portable iris authentication device 30, and FIG. 5B are enlarged plan views of a part of FIG. In FIG. 2, the symbol D is the distance between the eye 61 and the lens located near the focal length of the lens of the camera 42a, and the symbol M is the movement angle of the eye 61 with respect to the optical axis of the camera 42a. The eye 61 has a pupil 61b at the center of the iris 61a which is a black eye.

  3A and 3B are diagrams showing examples of screen display on the display screen 46a of FIG. The display screen 46a is provided with a display area 46b in which an eye image can be displayed. The iris circle I and the pupil circle P extracted from the iris 61a and the pupil 61b by the iris circle / pupil circle extraction unit 47 are displayed in the display area 46b. Is drawn.

  The operation of the portable iris authentication device 30 according to the first embodiment will be described below by dividing into (A) iris data registration operation and (B) iris authentication operation.

(A) Iris Data Registration Operation When the portable iris authentication device 30 is used, as shown in FIG. 2, the user 60 holds the casing 31 with the hand 62 and performs the registration process of the iris 61a. The camera 42a of the photographing unit 42 is brought close to one eye 61 of the photographing unit 42, and a photographing start key (not shown) provided in the input unit 41 is pressed to start photographing. In order to solve the two conventional problems, the following two procedures, (A1) a procedure for guiding the user to an appropriate photographing position, and (A2) an eye image photographing procedure in an optimal eye opening / closing state (that is, The iris data registration process is performed according to the procedure for guiding the user to the optimal eye opening / closing state.

(A1) Procedure for guiding the user to an appropriate imaging position In this procedure, the iris circle / pupil circle extraction unit 47 uses the iris circle I from the eye image captured by the image capture unit 44 during the registration operation of the user 60. And the pupil circle P are sequentially extracted, and under the control of the control unit 45, the iris circle I and the pupil circle P are superimposed on the eye image and sequentially displayed on the display screen 46a of the display unit 46, so that the iris 61a and the pupil 61b are correctly displayed. By making it easy for the user 60 to visually recognize whether it has been acquired, the user 60 is guided to an appropriate shooting position. The procedure will be described in detail below.

  First, by starting shooting by pressing a shooting start key (not shown) of the input unit 41, the light source 43a of the illumination unit 43 emits light and irradiates the vicinity of the eye 61 from the start of the positioning operation of the eye 61 with respect to the camera 42a. At the same time, the camera 42a of the photographing unit 42 is activated, the vicinity of the eye 61 is photographed and an image is acquired, and the image capturing unit 44 starts capturing the image. Further, the eye image being aligned is sequentially displayed on the display screen 46 a of the display unit 46 under the control of the control unit 45.

  For each captured image captured by the image capture unit 44, the iris circle / pupil circle extraction unit 47 includes, in the image, an iris circle I and a pupil circle P, which are circular portions of the iris 61a and the pupil 61b. Is detected by the extraction process. As a method of detecting the circular shape of the iris 61a / pupil 61b, a general algorithm in the image processing field such as edge detection and Hough transform may be used. At this time, the iris circle / pupil circle extraction unit 47 stores the center coordinates and diameter data of the detected iris circle I / pupil circle P for one frame.

  If the iris circle / pupil circle extraction unit 47 determines that the iris circle I / pupil circle P exists in the captured image (= the image displayed on the display screen 46a), the center coordinate and the diameter Data is sent to the control unit 45. In response to this, the control unit 45 displays the iris circle I and the pupil circle P in the display area 46b so as to overlap the captured image of the eye 61 as shown in the display screen 46a of FIG.

  FIG. 3A shows a state where the detected iris circle I and pupil circle P completely coincide with the positions of the iris 61a and pupil 61b of the actual eye image. The eye image at such a display is suitable for registration. The display of the iris circle I and the pupil circle P is preferably drawn with a line having a color tone that is clearly distinguished from the eye image.

  Further, depending on the position of the eye 61 in the image captured and displayed on the display screen 46a (that is, the movement angle M of the eye 61 with respect to the optical axis of the camera 42a), the iris circle I and the pupil circle P are correctly detected. Instead, as shown in FIG. 3B, the positions of the iris circle I and the pupil circle P may not coincide with the eye 61 and the iris 61a / pupil 61b in the image. In the first embodiment, the iris circle I and the pupil circle P are positively displayed on the display screen 46a even in such a case. As a result, the user 60 can intuitively grasp that the iris 61a is not correctly detected.

  When the user 60 looks at the display of FIG. 3B, the display of the iris 61a and pupil 61b in the actual eye image and the detected iris circle I and pupil circle P do not match. Therefore, it is determined that the iris 61a is not correctly detected, and the direction of the movement angle M of the own eye 61 is changed until these displays match as shown in FIG. Meanwhile, the positioning operation is continued. Through the above processing, the user 60 is guided to a photographing position suitable for registration.

(A2) Eye Image Shooting Procedure in Optimal Eye Open / Closed State This procedure is a procedure for guiding the user 60 to the optimal eye open / closed state. After the completion of the guide in (A1), the iris circle I and the pupil circle P Is automatically detected by the stationary determination unit 48, and the detection is used as a trigger by the display screen 46 a (or the display screen 46 a and the speaker 32) of the display unit 46 controlled by the control unit 45. By notifying the user 60 that the image is to be captured, an iris image that is more suitable for registration is captured. Hereinafter, the procedure will be described in detail with reference to FIGS. 4 (a), (b), FIG. 5, and FIGS. 6 (a), (b).

  4A and 4B are diagrams showing the transition of the center coordinate of the iris circle I and the variation amount of the diameter in FIG. FIG. 5 is a diagram showing a display example for signaling the user 60 at the time of registration in FIG. Further, FIGS. 6A and 6B are diagrams showing a display example for signaling the narrower user 60 in FIG. 2, and FIG. 6A shows a part of the iris 61a in the black eye part with the eyelid. The figure which shows the example of a display of the instruction | indication with respect to a state, and the figure (b) are figures which show a display example when image | photographing in the state which opened the eyelid and the iris 61a of the black-eye part was all exposed.

  When the user 60 is guided to an appropriate imaging position, the stationary determination unit 48 stores the center coordinates and the diameter (radius or radius) of the iris circle I / pupil circle P of the previous frame stored in the iris circle / pupil circle extraction unit 47. From the diameter information and the center coordinates and diameter information of the iris circle I and pupil circle P of the current frame, the amount of change in how much the iris circle I and pupil circle P have changed from the previous frame (previous frame information and current frame) (Difference with information).

  4A and 4B show changes in the center coordinate and the diameter variation of the iris circle I detected from each image frame by the stillness determination unit 48. FIG. The stillness determination unit 48 performs the following determination process using the transition data of the variation amounts of the center coordinates and the diameter.

  FIG. 4A shows a state in which the fluctuation amount of the center coordinate of the iris circle I in the previous frame and the current frame falls within the fluctuation width W1 that is less than or equal to the allowable fluctuation limit V1. This is because, as a result of the user 60 observing the extraction result of the iris circle I and the pupil circle P by the iris circle / pupil circle extraction unit 47, the iris circle I and the pupil circle P are extracted at the correct positions by the apparatus. By confirming this, the iris 61a is adjusted to an appropriate position while changing the direction of the eye 61 and is stationary, so that the fluctuation amount is gradually reduced. In the above description, the allowable fluctuation range W1 of the central coordinate fluctuation amount is a numerical value (for example, several pixels) that is empirically known and is stored in the storage unit 49 in advance.

  FIG. 4B shows a state in which the variation amount of the diameter of the iris circle I falls within the variation width W2 that is equal to or less than the allowable variation limit V2. This is because, as with the amount of change in the central coordinates, the user 60 observed the extraction result of the iris circle I / pupil circle P by the iris circle / pupil circle extraction unit 47. As a result, the iris circle I / pupil circle P becomes the device. By confirming that the correct size has been extracted, the iris 61a is placed at a suitable position while changing the distance D between the lens of the camera 42a and the eye 61, and the amount of variation gradually decreases. Represents that. The allowable fluctuation range W2 of the diameter fluctuation amount is also a numerical value known from experience (for example, several pixels), and is stored in advance in the storage unit 49.

  The stillness determination unit 48 monitors whether or not the value of the fluctuation amount of the center coordinate has changed for a certain time within the range of the fluctuation width W1. As a result, if it is determined that the value of the fluctuation amount has changed for a certain time within the range of the fluctuation width W1, the iris circle I and the pupil circle P are stably detected at a level suitable for registration. The stillness determination unit 48 instructs the control unit 45 to take a registration eye image for the user 60 by the display on the screen display 46a or the sound generated from the speaker 32 by the method described later. Give a signal.

  As for the diameter (radius or diameter), as in the case of the center coordinates, the stationary determination unit 48 analyzes the transition of the fluctuation amount to determine whether the transition is stable. If it is determined that the value of the fluctuation amount has changed for a certain time within the range of the fluctuation width W2, the iris circle I and the pupil circle P are stably detected at a level suitable for registration. As described above, the stillness determination unit 48 instructs the control unit 45 to shoot a registration eye image for the user 60 by display on the screen display 46a or sound generated from the speaker 32 by a method described later. Give a signal.

  In the determination, as a result of monitoring both the center coordinate and the diameter, it is necessary to determine that both fluctuations are in a stable state. Although only the variation amount of the iris circle I has been described here, the variation amount of the pupil circle P may be used, and further, both of the two variation amounts may be simultaneously used for determination.

  As a result of the determination, it can be confirmed that the user 60 is stationary at a position suitable for registration. Next, the user 61 is guided to open the eye 61 so that an image suitable for registration can be taken.

  FIG. 5 shows a display example of a cue for taking a registration image. At this time, the control unit 45 controls the display screen 46a of the display unit 46 to display a wording for shooting for registration. In addition, the control unit 45 controls the shutter of the camera 42a of the shooting unit 42. The remaining time until it is automatically turned off is displayed. With the sound from the speaker 32, for example, the count display is reduced and displayed in accordance with the countdown to “3, 2, 1” or the like.

  Simultaneously with the completion of the countdown, the shutter of the camera 42a of the photographing unit 42 is automatically released under the control of the control unit 45, and the eye 61 of the user 60 is photographed. The captured eye image is captured by the image capture unit 44 and sent to the iris recognition unit 50. The iris recognition unit 50 calculates iris data from the captured image, and iris recognition as registration data for later authentication. It is registered in the dictionary 51.

  The above-described operation is particularly suitable for guiding a fine person (or a person who has narrowed his eyes temporarily) to take a good eye image, which is likely to be an image in which the eyelids are hung on the iris. .

  FIGS. 6A and 6B show a display example of a cue for capturing a registration image in the case of a detail. Among these, FIG. 6A shows a state in which the eye 61 of the user 60 is fine, and the detected iris circle I and pupil circle P are overlaid on the eye image. ing. The iris circle I / pupil circle P in this case is determined to have a normal position and radius by the iris circle / pupil circle extraction unit 47. In the case of a fine line, since a part of the iris 62a is covered with the eyelid, even if the drawn iris circle I and pupil circle P are normal, they do not completely coincide with the actual iris part.

  That is, in the fine case described above, the fine image is used for the registration process as it is, and there is a problem in terms of recognition accuracy. Therefore, as shown in FIG. 6A, a word prompting the user 60 to open the eyes 61 is displayed. In accordance with this, the user 60 opens the eyes 61 so that the actual iris portion coincides with the drawn iris circle I.

  FIG. 6B shows a state where the eye 61 is wide open and the actual iris portion coincides with the drawn iris circle I. In this state, as described with reference to FIG. 5, a count display of the remaining time until the shutter is automatically released is displayed, and the count display is also reduced in accordance with the countdown to “3, 2, 1”, etc. by voice. Is displayed. Under the control of the control unit 43, the shutter of the camera 42a of the photographing unit 42 is automatically turned off simultaneously with completion of the countdown, and the eyes of the user 60 are photographed.

  As a device for strongly urging the user 60 to match the actual iris portion with the drawn iris circle I, the drawn iris circle I and pupil circle P may be flashed and guided. Good. Also, for the arc of the iris circle I that coincides with the iris portion photographed inside the fine details, the iris circle I is switched from small to large, by drawing it in a fixed manner and blinking only the portion hidden by the eyelid. You may make it display and alert the user 60 to alignment.

(B) Iris Authentication Operation When the user 60 authenticates the eye 61 using the portable iris authentication device 30, the camera 42a of the photographing unit 42 is brought close to the front of one eye 61 of the user 60, and the camera 42a The eye 61 is positioned. When the user 60 presses a shooting start key (not shown) of the input unit 41, the eye 61 is irradiated by the light source 43a and the eye 61 is shot by the camera 42a. The captured eye image is captured by the image capture unit 44 and sent to the iris recognition unit 50. The iris recognition unit 50 extracts the iris data from the captured image and registers the iris data in the iris recognition dictionary 51. And whether or not the user 60 is the user is recognized.

(Effect of Example 1)
According to the first embodiment, the position of the iris circle I and the pupil circle P displayed on the display screen 46a is always displayed superimposed on the actual eye image under the control of the control unit 45, so that the user 60 Can intuitively grasp whether the position of the eye 61 is correctly positioned. In addition, since the stationary determination unit 48 detects that the iris position is stable and instructs the photographing unit 42 to shoot a registered image, the registration eye image is taken. An ideal iris 61a is photographed. As a result, even for a user 60 who is not skilled in registration, iris data is registered from an ideal eye image, and as a result, the accuracy of iris recognition processing is improved.

(Modification)
The present invention is not limited to the first embodiment, and various usage forms and modifications are possible.
For example, in the first embodiment, the example in which the iris authentication apparatus main body 40 is mounted on the mobile phone has been described. However, the iris authentication apparatus main body 40 may be mounted on another mobile terminal device such as a PDA (Personal Digital Assistant) or You may make it the fixed-type apparatus structure which mounted the function in a personal computer etc. Further, the iris authentication apparatus main body 40 may omit the image capture unit 44 or may add other functional blocks other than those shown in the drawing in order to improve accuracy, expand applications, and the like.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the portable iris authentication apparatus which shows Example 1 of this invention. It is a figure which shows the use condition in the portable iris authentication apparatus 30 of FIG. It is a figure which shows the example of a screen display in the display screen 46a of FIG. It is a figure which shows transition of the movement amount of the center coordinate and diameter of an iris circle in FIG. It is a figure which shows the example of a display which signals the user 60 at the time of registration in FIG. It is a figure which shows the example of a display which signals the fine user 60 in FIG. It is a schematic block diagram which shows the conventional portable iris authentication apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 30 Iris authentication apparatus 40 Iris authentication apparatus main body 42 Image pick-up part 42a Camera 43 Illumination part 43a Light source 44 Image capture part 45 Control part 46 Display part 46a Display screen 47 Iris circle / pupil circle extraction part 48 Stationary determination part 50 Iris recognition part 51 Iris Recognition dictionary

Claims (6)

Lighting means for irradiating light to the eyes of the individual;
Based on the first control signal when registering the iris data of the eye, the first eye image is obtained by photographing the eye irradiated with the light, and based on the photographing start signal when the iris data of the eye is authenticated, Photographing means for photographing the eye irradiated with the light and obtaining a second eye image;
Extraction means for sequentially extracting iris circles and pupil circles from the plurality of first eye images acquired by the photographing means;
Display means for displaying the sequentially extracted iris circle and pupil circle on the display screen respectively superimposed on the acquired plurality of first eye images based on a second control signal;
Registration means for registering the iris data;
Determining means for monitoring fluctuations in the position and size of the iris circle and pupil circle corresponding to the plurality of acquired first eye images and determining whether the fluctuation is smaller than a predetermined amount; ,
At the time of registration, the second control signal is output to control the display means, and when the determination result is “smaller than a predetermined amount”, the first control signal is output to control the photographing means. Control means for controlling;
The iris data is extracted from the acquired first eye image corresponding to the determination result, registered by the registration unit, and the iris data is acquired from the second eye image acquired by the imaging unit at the time of authentication. Recognizing means for recognizing the second eye image by comparing the extracted iris data with the iris data registered by the registration means;
An iris authentication apparatus characterized by comprising: Lighting means for irradiating light to the eyes of the individual;
Based on the first control signal when registering the iris data of the eye, the first eye image is obtained by photographing the eye irradiated with the light, and based on the photographing start signal when the iris data of the eye is authenticated, Photographing means for photographing the eye irradiated with the light and obtaining a second eye image;
Capture means for capturing the acquired first and second eye images;
Extraction means for sequentially extracting iris circles and pupil circles from the plurality of captured first eye images;
Display means for displaying the sequentially extracted iris circle and pupil circle on the display screen respectively superimposed on the acquired plurality of first eye images based on a second control signal;
Registration means for registering the iris data;
Determining means for monitoring variations in the position and size of the iris circle and the pupil circle corresponding to the plurality of captured first eye images, and determining whether the variation is smaller than a predetermined amount; ,
At the time of registration, the second control signal is output to control the display means, and when the determination result is “smaller than a predetermined amount”, the first control signal is output to control the photographing means. Control means for controlling;
The iris data is extracted from the captured first eye image corresponding to the determination result and registered by the registration unit, and the iris data is extracted from the captured second eye image at the time of authentication. Recognizing means for recognizing the second eye image by comparing the extracted iris data with the iris data registered by the registration means;
An iris authentication apparatus characterized by comprising:   3. The control unit according to claim 1, wherein the control unit has a control function for causing the display unit to display a signal to the individual prior to photographing of the eyes by the photographing unit at the time of registration. Iris authentication device   4. The control device according to claim 1, wherein the control unit has a control function of causing the individual to generate a cue count from the sound generation unit prior to photographing of the eyes by the photographing unit at the time of registration. The iris authentication apparatus of any one of Claims.   Prior to the signal, the control means has a control function for displaying the extracted iris circle on the display means and for displaying on the display means a word prompting the individual to open the eyelid. The iris authentication apparatus according to claim 3 or 4, characterized in that:   The control means has a control function of causing the extracted iris circle to blink and to be displayed on the display means so that the individual can recognize the presence of the extracted iris circle. The iris authentication apparatus described.

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