WO2009107704A1

WO2009107704A1 - Iris authentication device

Info

Publication number: WO2009107704A1
Application number: PCT/JP2009/053513
Authority: WO
Inventors: 渡辺　孝弘; 藤井　明宏
Original assignee: 沖電気工業株式会社
Priority date: 2008-02-26
Filing date: 2009-02-26
Publication date: 2009-09-03

Abstract

In processing the registration of iris data at an iris recognition dictionary, during a period in which an operator aligns an eye, an iris circle/pupil circle extracting unit successively extracts an iris circle and a pupil circle from an eye image that is captured by an image capture unit. The iris circle or the pupil circle is superimposed with the capture image as a basis on the extraction and the superimposed image is successively displayed on a display screen, so as to make it easy to visually recognize whether the iris circle and the pupil circle are acquired at a correct position and whether the iris is correctly detected. When the operator confirms the display to judge that the drawn iris circle or pupil circle is consistent with the iris or pupil of an actual eye image, the operator pushes down a registration start key at an input unit and can carry out the registration.

Description

Iris authentication device

The present invention relates to an iris authentication device 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, when a user captures an eye image in advance and registers data. The present invention relates to a technique for preventing registration error of a registered image and enabling registration of a better eye image (that is, an eye image).

As a conventional technique, a fixed iris authentication device using an image of an iris portion of a human eye is disclosed in Japanese Patent No. 3307936. Further, portable iris authentication devices are disclosed in Japanese Patent Application Laid-Open Nos. 2005-292542, 2005-327161, and 2008-15884.

As described in these documents, the conventional iris authentication apparatus acquires an eye image in a user's living body with a camera, cuts out an iris part from the acquired eye image, extracts iris data, When matching with the iris data of the registered user, the user is authenticated as the user.

15A and 15B are a schematic configuration diagram and a functional block diagram showing a conventional portable iris authentication apparatus described in the above-mentioned document. FIG. 15A is a schematic configuration diagram (outside view) of the portable iris authentication device, and FIG. 15B is a functional block diagram of the iris authentication device main body in FIG. 15A.

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 main 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 illuminating light source 23a shoots the eyes with the camera 22a and obtains an image of the eyes. The illuminating light source 23a emits light to irradiate the eyes with the light. Works to shoot the eyes.

The iris authentication apparatus main body 20 in the housing unit 11 is acquired by the input unit 21 having a registration (shooting) start key and the like, the shooting unit 22 having a camera 22a, the lighting unit 23 having an illumination light source 23a, and the shooting unit 22. The image capturing unit 24 captures (acquires) an eye image, the 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 photographed by the photographing unit 22 is captured by the image capturing unit 24, and the image data is displayed on the display screen 25 a of the display unit 25 and 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 (authenticate).

In the conventional iris authentication apparatus 10, the user himself / herself takes an image and authenticates in the above authentication process. 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 expected that the following two problems (1) and (2) will 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, an image not suitable for registration may be registered. Also, depending on the performance of the apparatus, the registration start key press timing may differ from the actual captured image. For example, when the registration start key is pressed, the iris data of the actually captured image is registered with a time delay later than this, so there is no blink of eyes between the registration start key press and registration. When this is done, the registration start key press timing differs from the actual captured image. For this reason, there may be a case where an image or the like whose eyes are not opened differently from the image confirmed on the display screen 25a is registered.

For the above reasons, if an eye image that is not suitable for registration is registered, there is a possibility that misrecognition or recognition failure may occur frequently during recognition.

An iris authentication apparatus according to a first aspect of the present invention includes an illumination unit that irradiates light to an individual's eyes, an imaging unit that captures the eye irradiated with the light and acquires the image of the eye, and a plurality of the imaging units An extraction unit that sequentially extracts an iris circle and a pupil circle from an image of the eye, a display unit that displays the sequentially extracted iris circle or pupil circle on the display screen in a superimposed manner on the plurality of eye images, and the individual Has an input unit capable of inputting that the content of the display screen has been confirmed, a registration unit for registering data, and a recognition unit.

When the input is made, the recognizing unit extracts iris data from the eye image, registers the extracted iris data in the registration unit, and creates new iris data from the new eye image acquired by the photographing unit at the time of authentication. And the new iris data extracted and the iris data registered in the registration unit are collated to recognize the new eye image.

The iris authentication device according to the first aspect includes a capture unit that captures and stores a plurality of images of the eyes acquired by the imaging unit, and when the input is performed from the input unit, the plurality of stored A selection unit that reads out an eye image and selects an eye image to be registered, and the recognition unit extracts iris data from the selected eye image and stores the iris data in the registration unit. You may register.

The iris authentication apparatus according to the second aspect of the present invention shoots an eye irradiated with light based on a lighting unit that irradiates light to the eyes of an individual and a first control signal when registering iris data of the eyes. A first eye image, and at the time of authentication of iris data of the eye, based on a photographing start signal, photographing the eye irradiated with the light to obtain a second eye image, and a plurality of the first eye images An extraction unit that sequentially extracts iris circles and pupil circles from one eye image, and the sequentially extracted iris circles or pupil circles are superimposed on the plurality of first eye images, respectively, based on a second control signal. A display unit for displaying on a display screen; a registration unit for registering the iris data; and monitoring the variation in the position and size of the iris circle or the pupil circle corresponding to the plurality of first eye images, and the variation A determination unit for determining whether or not is smaller than a predetermined amount, and at the time of registration Control that outputs the second control signal to control the display unit, and outputs the first control signal to control the imaging unit when the determination result is “smaller than a predetermined amount”. Part and a recognition part.

The recognizing unit extracts the iris data from the acquired first eye image at the time of registration and registers it by the registration unit, and extracts the iris data from the second eye image at the time of authentication. The second eye image is recognized by comparing the iris data with the iris data registered by the registration unit.

The iris authentication apparatus according to the second aspect may further include a capture unit that captures the first and second eye images acquired by the photographing unit, and the extraction unit, the determination unit, and the recognition unit are configured to capture the capture unit. The processed first and / or second eye image may be processed.

According to the iris authentication apparatus of the present invention, the position of the iris circle or the pupil circle displayed on the display screen is always superimposed on the actual eye image when registering the iris. Therefore, the user can intuitively grasp whether the iris is correctly detected. Therefore, the eye image can be registered from the ideal shooting position. As a result, by registering the eye image at the correct position, the iris data is correctly acquired from the eye image, and the accuracy of the matching process is improved.

According to another iris authentication apparatus of the present invention, when a user performs an input for starting registration on the assumption that the iris has been acquired correctly, an input timing for starting the registration and an actual captured image are obtained. Even if they are different, the optimum image is selected from the stored eye images and registered. Therefore, iris data is acquired correctly, and misrecognition and recognition failure can be reduced.

According to the present invention, the position of the iris circle or the pupil circle displayed on the display screen is always displayed superimposed on the actual eye image under the control of the control unit. Therefore, the user can intuitively grasp whether the eye position is correctly positioned. In addition, the determination unit detects that the iris position is stable and instructs the photographing unit to shoot a registered image, and then shoots a registration eye image. The iris is photographed. As a result, even a user who is not skilled in registration can register iris data from an ideal eye image, and as a result, the accuracy of iris recognition processing is improved.

1 is a schematic configuration diagram of a portable iris authentication device according to Embodiment 1. FIG. 1 is a functional block diagram of a portable iris authentication device according to Embodiment 1. FIG. It is a figure which shows the use condition of the portable iris authentication apparatus 30 of FIG. 1A. It is a figure which shows the use condition of the portable iris authentication apparatus 30 of FIG. 1A. It is a figure which shows the example of the screen display in the display screen 46a of FIG. 1A. It is a figure which shows the example of the screen display in the display screen 46a of FIG. 1A. It is a functional block diagram of the iris authentication apparatus main body in the portable iris authentication apparatus which concerns on Example 2. FIG. It is a figure which shows the general fluctuation | variation of the movement amount of the iris center coordinate in Example 2, and the movement amount of the diameter of an iris. It is a figure which shows the general fluctuation | variation of the magnitude | size of the diameter of an iris in Example 2, an iris expression rate, and a focus degree. It is a conceptual diagram of the iris expression rate in Example 2. FIG. 10 is a diagram illustrating a display example of registration image selection in the third embodiment. It is a schematic block diagram of the portable iris authentication apparatus which shows Example 5 of this invention. It is a functional block diagram of the portable iris authentication device which shows Example 5 of this invention. It is a figure which shows the use condition of the portable iris authentication apparatus 30 of FIG. 9A. It is a figure which shows the use condition of the portable iris authentication apparatus 30 of FIG. 9A. It is a figure which shows the example of a screen display in the display screen 46a of FIG. 9A. It is a figure which shows the example of a screen display in the display screen 46a of FIG. 9A. In Example 5, it is a figure which shows transition of the variation | change_quantity of the center coordinate of an iris circle. In Example 5, it is a figure which shows transition of the variation | change_quantity of the diameter of an iris circle. It is a figure which shows the example of a display which signals the user 60 at the time of registration in Example 5. FIG. It is a figure which shows the example of a display which signals the fine user 60 in Example 5. FIG. It is a figure which shows the example of a display which signals the fine user 60 in Example 5. FIG. It is a schematic block diagram of the conventional portable iris authentication apparatus. It is a functional block diagram of the conventional portable iris authentication device.

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

(Configuration of Example 1)
1A and 1B are a schematic configuration diagram and a functional block diagram of a portable iris authentication apparatus according to Embodiment 1 of the present invention. 1A is a schematic configuration diagram (external view) of the portable iris authentication device, and FIG. 1B is a functional block diagram of the iris authentication device main body in FIG. 1A.

As shown in FIG. 1A, the portable iris authentication device 30 according to the first embodiment is a device that is mounted on a mobile terminal device (for example, a mobile phone) and authenticates a human iris, and includes a housing unit 31. Yes. An iris authentication device main body 40 as shown in FIG. 1B is provided inside the housing unit 31. On the front side (that is, the front side) of the casing 31, a camera 42a including a lens, a shutter, and the like, an illumination light source 43a that generates light, a display screen 46a such as a liquid crystal, and a shooting start key (not shown) And an input unit 41 and so on.

The iris authentication apparatus main body 40 provided in the housing unit 31 has a photographing unit 42 connected to an input unit 41, and an illumination unit 43 and an image capture unit 44 are connected to the photographing unit 42. . The photographing unit 42 includes a camera 42a, and operates the lens, shutter, and the like of the camera 42a to photograph an eye that is a subject located in front of the camera 42a and obtain an eye image. The illumination unit 43 includes a light source 43a for illumination, and emits light from the light source 43a and irradiates light to the eye in synchronization with the timing of photographing the eyes by the photographing unit 42. The image capture unit 44 has a storage unit such as a memory, and captures an eye image acquired by the photographing unit 42, and a display unit 46 is connected to the image capture unit 44 via a display control unit 45. , An extraction unit (for example, an iris circle / pupil circle extraction unit) 47 is connected.

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 sequentially extracts the iris circle / pupil circle from the eye image captured by the image capture unit 44. A display control unit 45 is connected to the display unit 46 and the iris circle / pupil circle extraction unit 47. The display control unit 45 controls the display unit 46 in order to display the extraction result of the iris circle / pupil circle by the iris circle / pupil circle extraction unit 47 on the display screen 46a.

A recognition unit (for example, iris recognition unit) 48 is connected to the image capture unit 44, and a registration unit (for example, iris recognition dictionary) 49 is further connected to the iris recognition unit 48. The iris recognition unit 48 extracts iris data from the eye image captured by the image capture unit 44 during registration and registers it in the iris recognition dictionary 49, and extracts iris data from the eye image captured by the image capture unit 44 during authentication. Then, the extracted iris data and the iris data registered in the iris recognition dictionary 49 are collated 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 main body 40 or an individual circuit.

(Operation of Example 1)
2A and 2B are diagrams showing a use state in the portable iris authentication device 30 of FIG. 1A. 2A is a side view showing a method of positioning the eye 51 within the imaging range of the portable iris authentication device 30 when the user 50 registers and authenticates the iris 51a of the eye 51, and FIG. 2B is a part of FIG. 1A. FIG. 2A and 2B, the symbol D is the distance between the eye 51 located near the focal length of the lens of the camera 42a and the lens, and the symbol M is the movement angle of the eye 51 with respect to the optical axis of the camera 42a. The eye 51 has a pupil 51b at the center of an iris 51a which is a black eye.

3A and 3B are diagrams showing examples of screen display on the display screen 46a of FIG. 1A. The display screen 46a is provided with a display area 46b where an eye image can be displayed. The iris circle I and the pupil circle P extracted from the iris 51a and the pupil 51b by the iris circle / pupil circle extraction unit 47 are displayed in the display area 46b. Is drawn.

When using the portable iris authentication device 30 according to the first embodiment, as shown in FIG. 2A, the user 50 holds the casing 31 with a hand 52 and performs the registration process of the iris 51a. The camera 42a of 42 is brought close to one eye 51 of its own, and a shooting start key (not shown) provided in the input unit 41 is pressed to start shooting. Then, from the start of the positioning operation of the eye 51 with respect to the camera 42a, the light source 43a of the illumination unit 43 emits light and the vicinity of the eye 51 is irradiated. Further, the camera 42a of the photographing unit 42 is activated, the vicinity of the eye 51 is photographed and an image is acquired, and the image capturing unit 44 starts capturing the image. Further, the images being aligned are sequentially displayed on the display screen 46 a of the display unit 46 under the control of the display control unit 45.

The iris circle / pupil circle extraction unit 47 determines whether the iris circle I and the pupil circle P, which are circular portions of the iris 51a and the pupil 51b, exist in the captured image captured by the image capture unit 44. Whether or not is detected by extraction processing. As a method for detecting the circular shapes of the iris 51a and the pupil 51b, for example, a general algorithm in the image processing field such as edge detection and Hough transform can be used.

If the iris circle / pupil circle extraction unit 47 determines that the iris circle I / pupil circle P is present in the captured image (= the image displayed on the display screen 46a), its center coordinates and diameter (radius or diameter) ) Is sent to the display control unit 45. In response to this, the display 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 51 as shown in the display screen 46a of FIG. 3A.

FIG. 3A shows a state in which the detected iris circle I and pupil circle P completely coincide with the positions of the iris 51a and pupil 51b of the actual eye image. The eye image at the time of such 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. In addition, it is best to display both the iris circle I and the pupil circle P, but there is no problem even if only one of them is displayed.

On the other hand, depending on the position of the eye 51 in the image (that is, the movement angle M of the eye 51 with respect to the optical axis of the camera 42a), the detection of the iris circle I and the pupil circle P is not performed correctly, as shown in FIG. 3B. In addition, the positions of the iris circle I and the pupil circle P may not coincide with the eye 51 and the iris 51a / pupil 51b 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. Thereby, the user 50 can intuitively grasp that the iris 51a is not correctly detected.

When the user 50 looks at the display of FIG. 3B, it is clear that the display of the iris 51a / pupil 51b in the actual eye image does not match the display of the detected iris circle I and pupil circle P. Understandable. Therefore, it is determined that the iris 51a has not been detected correctly, and the positioning operation is continued while changing the direction of the movement angle M of the eye 51, etc., until these displays match as shown in FIG. 3A. .

When the user 50 confirms that the display on the display screen 46a is as shown in FIG. 3A, the user 50 determines that the eye 51 has been correctly positioned, and presses a registration start key (not shown) of the input unit 41. . As a result, the captured image data of the eye 51 when the key of the user 50 is pressed is sent from the image capture unit 44 to the iris recognition unit 48. When the iris recognition unit 48 calculates iris data from the eye image and stores the iris data in the iris recognition dictionary 49, registration is completed.

As described above, in the registration process according to the first embodiment, while the user 50 is aligning the eye 51, the iris circle / pupil circle extraction unit 47 extracts the iris from the eye image captured by the image capture unit 44. Circle I and pupil circle P are extracted sequentially. The iris circle I and the pupil circle P are sequentially displayed on the display screen 46a so as to overlap the captured image that is the basis of extraction, and the iris 51a and the pupil 51b are acquired at the correct positions, and the iris 51a is correctly detected. I made it easier to see. When the user 50 confirms the display and determines that the drawn iris circle I and pupil circle P match the iris 51a and pupil 51b of the actual eye image, the registration start key is pressed to register. It can be performed.

On the other hand, when the user 50 authenticates the eye 21 using the portable iris authentication device 30, the camera 42a of the photographing unit 42 is brought close to one eye 51 of the user and the position of the eye 51 with respect to the camera 42a is determined. Do. When the user 50 presses an authentication start key (not shown) of the input unit 41, the eye 51 is irradiated by the light source 43a, and the eye 51 is photographed by the camera 42a. The captured eye image is captured by the image capture unit 44 and sent to the iris recognition unit 48. The iris recognition unit 48 extracts the iris data from the captured image, compares it with the iris data registered in the iris recognition dictionary 49, and recognizes whether or not the user 50 is the user.

(Effect of Example 1)
According to the first embodiment, when the iris 51a is registered, the positions of the iris circle I and the pupil circle P displayed on the display screen 46a are always superimposed on the actual eye image. It is possible to intuitively grasp whether 51a is correctly detected. Therefore, an eye image can be registered from an ideal shooting position. As a result, by registering the eye image at the correct position, the iris data is correctly acquired from the eye image, and the accuracy of the matching process is improved.

Note that the technique of the first embodiment is more effective when it is a high-performance portable terminal device and the time from the registration start key pressing to the image capture is very short.

(Configuration of Example 2)
FIG. 4 is a functional block diagram of the iris authentication apparatus main body in the portable iris authentication apparatus according to the second embodiment. Elements common to the elements in FIG. 1B showing the first embodiment are denoted by common reference numerals. .

The iris authentication apparatus main body 40A in the portable iris authentication apparatus of the second embodiment has a function instead of the image capture unit 44 and the iris circle / pupil circle extraction section 47 in the iris authentication apparatus main body 40 of the first embodiment. A different image capture unit 44A and an iris circle / pupil circle extraction unit 47A are provided, and a selection unit (for example, an image selection unit) 61 is newly added.

The image capture unit 44A includes a storage unit 44a such as a memory, and captures a plurality of images of the eye 51 positioned by the user 50 and acquired by the photographing unit 42 and stores them in the storage unit 44a. A display control unit 45, an iris circle / pupil circle extraction unit 47A, and an image selection unit 61 are connected to the image capture unit 44A. The iris circle / pupil circle extraction unit 47A sequentially extracts the iris circle I and the pupil circle P from the plurality of eye images stored in the storage unit 44a. The image selection unit 61 reads a plurality of eye images from the storage unit 44a retroactively by a predetermined time from the time when a registration start key (not shown) of the input unit 41 is pressed, and is suitable for registration (that is, an eye image suitable for registration). Select the eye image to be registered.

In the second embodiment, the image selection unit 61 searches the image stored in the storage unit 44a of the image capture unit 44A by going back a predetermined time from the time when the user 50 presses the registration start key. Then, an eye image to be registered is selected from the stored captured images. Other configurations are the same as those of the first embodiment. In addition, each configuration necessary for the iris authentication function is configured by software or individual circuits incorporated in the iris authentication apparatus main body 40A, as in the first embodiment.

(Operation of Example 2)
5 to 7 are diagrams for explaining the operation in the iris authentication apparatus main body 40 of FIG. FIG. 5 is a diagram showing a general variation of the movement amount of the iris center coordinate and the movement amount of the iris diameter, and FIG. 6 shows a general variation of the size of the iris diameter, the iris expression rate, and the focus degree. FIG. 7 is a conceptual diagram of the iris expression rate.

When using the portable iris authentication device 30 according to the second embodiment, the user 50 brings the camera 42a of the photographing unit 42 close to the one eye 51 of his / her own to the input unit 41 in substantially the same manner as the first embodiment. A shooting start key (not shown) provided is pressed to start shooting. Then, the vicinity of the eye 51 is photographed by the camera 42a of the photographing unit 42, and an image is acquired. The image capture unit 44A starts capturing the image and stores it in the storage unit 44a. The images being aligned are sequentially displayed on the screen 46a. For the captured image stored in the storage unit 44a of the image capture unit 44, the iris circle / pupil circle extraction unit 47A determines whether the iris circle I and the pupil circle P of the iris 51a and the pupil 51b exist in the image. Is detected by the extraction process.

As in the first embodiment, when the iris circle / pupil circle extraction unit 47A determines that the iris circle I / pupil circle P exists in the captured image (= the image displayed on the display screen 46a), the center coordinates thereof , And diameter (radius or diameter) data is sent to the display control unit 45. In response to this, the display 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 51 as shown in the display screen 46a of FIG. 3A. When the user 50 confirms that the display on the display screen 46a is as shown in FIG. 3A, the user 50 determines that the eye 51 has been correctly positioned, and presses a registration start key (not shown) of the input unit 41. .

As described above, the process until the user 50 confirms the display of FIG. 3A and presses a registration start key (not shown) of the input unit 41 is substantially the same as that of the first embodiment. Hereinafter, differences from the first embodiment will be described.

In the second embodiment, unlike the first embodiment, captured images for a certain period of time are always stored in the storage unit 44a of the image capture unit 44A. Specifically, the storage unit 44a stores, for example, about 10 image frames and the center coordinates of the iris circle I and the pupil circle P for about 1 second. In the following description, it is assumed that ten images are stored in the storage unit 44a of the image capture unit 44A. However, it is not always necessary to have ten images, and any number of images may be used.

For about 10 image frames stored in the image capture unit 44A, the image selection unit 61 determines that each image frame has the center coordinates and diameters of the iris circle I and the pupil circle P relative to the previous image frame ( The amount of change (difference), the degree of focus, and the iris expression rate of how much the radius or diameter) has changed are obtained.

Here, the center coordinates of the iris circle I and the pupil circle P change when the eye 51 of the user 50 moves with respect to the optical axis of the camera 42a in the state of FIG. 2A. The diameter (radius or diameter) of the iris circle I and the pupil circle P is such that when the eye 51 of the user 50 moves away from the camera 42a and the distance D increases, the diameter decreases and the eye 51 approaches the camera 42a and the distance D increases. When becomes smaller, the diameter becomes larger. The larger the diameter of the iris circle I and the pupil circle P, the higher the iris authentication accuracy. The in-focus degree is a ratio at which the focal length of the lens of the camera 42a matches the distance D. The higher the in-focus degree, the clearer the image taken by the camera 42a and the higher the iris authentication accuracy. In FIG. 7, the iris expression rate is S <b> 1 where the area of the entire part of the iris 51 a (that is, the total area when the iris 51 a has no part hidden by the 瞼 53) is hidden by the 瞼 53. When the area of the iris portion (shaded portion in FIG. 7) is S2, the ratio is represented by the following formula (1). The larger this iris expression rate, the higher the iris authentication accuracy.
Iris expression rate = (S1-S2) / S1 x 100 (%) (1)
However, S1; area of all irises 51a, S2; area of iris part hidden by ridge 54

FIG. 5 shows a general transition of the variation amount of the central coordinates or the variation amount of the diameter of the iris circle I or the pupil circle P detected from each image frame stored in the image capture unit 44A. FIG. 5 shows that as a result of the user 50 viewing the iris circle / pupil circle extraction result, it is confirmed that the iris circle I / pupil circle P has been extracted to the correct position by the apparatus, so that the iris 50 can be properly positioned. Since 51a is put together and it stops, it represents that the variation | change_quantity becomes small gradually.

FIG. 6 shows general transitions of the diameter (radius or diameter) of the iris circle I and pupil circle P detected from each image frame stored in the image capture unit 44A, the degree of focus, and the magnitude of the iris expression rate. It is shown. The diameter (radius or diameter), focus degree, and iris expression rate of the iris circle I / pupil circle P tend to gradually increase because the eye 51 is opened wide until registration is completed.

In the

image selection unit

61, 10 images are obtained based on the center coordinates of the iris circle I, the moving amount of the diameter, the size of the diameter of the iris 51a, the degree of focus, and the iris expression rate obtained from each of the images. An image suitable for registration is automatically extracted from the inside based on the evaluation value.

As for the center coordinate and the moving amount of the diameter of the iris circle I, as shown in FIG. 5, since the moving amount / change amount of the eye image tends to be gradually reduced, the evaluation value is obtained for an image having a small value. To increase. As for the diameter of the iris 52a, as shown in FIG. 6, since the diameter of the iris 52a tends to gradually increase because the eye 52a is opened close to the eye until registration, a large value is obtained. The evaluation value is increased for the image taken. As shown in FIG. 6, the iris expression rate has a large value because the iris expression rate tends to gradually increase since the eyes are opened wide open until registration. Increase the evaluation value for the image.

FIG. 7 shows the concept of the iris expression rate. Using the image of the iris portion of the target image frame, for example, the iris expression rate is obtained from the equation (1).

As shown in FIG. 6, the degree of focus is large, since the degree of focus tends to gradually increase since the eye 51 is opened wide until registration is performed, as shown in FIG. 6. Increase the evaluation value for. As a method for obtaining the degree of focus, for example, a generally known edge detection method or the like obtained by quantifying the edge strength of an image may be applied.

In this way, the evaluation value obtained from each feature amount is comprehensively determined, and the final registered image is selected. As a comprehensive judgment method, the evaluation values may be summed up using one or more of each feature amount, or the final evaluation value may be obtained using an evaluation function with appropriate weighting according to each feature amount. May be calculated and determined based thereon.

The image selection unit 61 determines a registered image by the above-described method, but as a result of the determination, a plurality of images may be suitable. In this case, as long as it is determined to be suitable for registration, not only one but also a plurality of sheets may be extracted and registered. The image selection unit 61 sends image data suitable for registration from the image capture unit 44A to the iris recognition unit 48. The iris recognition unit 48 calculates iris data from the eye image, stores this iris data in the iris recognition dictionary 49, and completes registration.

In the second embodiment, only the previous image from the time when the registration start key is pressed has been described. However, the image after the registration start key is pressed may be used together.

(Effect of Example 2)
According to the second embodiment, when the user 50 thinks that the iris 51a has been correctly acquired and presses the registration start key, even when the registration start key press timing differs from the actual captured image, Since an optimal image is selected and registered from the stored eye images, iris data is correctly acquired, and erroneous recognition and recognition inability can be reduced. Note that when the images after pressing the registration start key are used together, iris data can be acquired more correctly, and erroneous recognition and recognition failure can be further reduced.

(Configuration of Example 3)
In the third embodiment, the iris authentication apparatus main body 40A shown in FIG. 4 showing the second embodiment is configured to select an optimum image semi-automatically when the registration start key is pressed.

(Operation of Example 3)
FIG. 8 is a diagram illustrating a display example of registration image selection in the third embodiment.
In FIG. 8, from the 10 captured images, the amount of movement of the iris center coordinates, the amount of change in the diameter of the iris, the size of the diameter of the iris, the iris expression rate, and the characteristics of the degree of focus are the same as in the second embodiment. By the method of automatically evaluating the amount, the image selection unit 61 automatically narrows down the images suitable for registration into several images by automatic selection, and the selected several images are displayed on the display screen under the control of the display control unit 45. The state displayed in the display areas 46b-1 to 46b-4 of 46a is shown. Viewing this display screen 46a, the user 50 selects an eye image to be registered. The image to be selected at this time is not necessarily one image, and a plurality of images can be selected.

When the user 50 selects an image and then presses the registration start key again, the image data of the selected eye 51 is sent from the image capture unit 44A to the iris recognition unit 48. The iris authentication unit 48 calculates iris data from the received eye image, stores the iris data in the iris recognition dictionary 49, and ends registration.

In the above description, 4 images are automatically selected from 10 images, and the user 50 is allowed to select a registered image from the 4 images. However, the number of base captured images may be appropriately increased or decreased, or the number of images to be automatically selected is not limited to four and may be set as appropriate. In addition, various existing techniques can be applied to the interface such as icons on the display screen 46a for the user 50 to select a registered image.

(Effect of Example 3)
According to the third embodiment, the user 50 makes a final selection with respect to an eye image that is highly likely to be registered after the apparatus has selected images to a certain number in a semi-automatic manner. Therefore, even if the apparatus is selected by mistake, an optimal image can be selected from the viewpoints of both the apparatus and the user 50, so that a higher quality image can be surely registered.

(Configuration of Example 4)
In the fourth embodiment, the iris authentication apparatus main body 40A of FIG. 4 showing the second embodiment is configured to manually select the optimum image when the registration start key is pressed. That is, in the manner shown in FIG. 8 showing the third embodiment, all 10 images captured by the image capture unit 44A are displayed on the display screen 46a under the control of the display control unit 45, and the user 50 manually selects the images. In this configuration, an image to be used for final registration is selected.

(Operation of Example 4)
The user 50 aligns the eye 51 with the camera 42a of the photographing unit 42, confirms the display content of the display screen 46a, and presses the registration start key. From the time when the registration start key is pressed, the stored image stored in the storage unit 44a of the image capture unit 44A is traced back, and all these images are displayed on the display screen 46a under the control of the display control unit 45. Viewing this screen, the user 50 selects an eye image to be registered. The image to be selected at this time is not necessarily one. A plurality of images may be selected, or all images may be registered.

(Effect of Example 4)
According to the fourth embodiment, since the user 50 can check all the captured images in the image selection range, the user 50 who is relatively accustomed to the eye image checking operation can check the captured eye image in more detail. An easy-to-use device can be provided when desired. As a result, a higher quality image can be reliably registered.

(Configuration of Example 5)
9A and 9B are a schematic configuration diagram and a functional block diagram of a portable iris authentication apparatus showing the fifth embodiment. 9A is a schematic configuration diagram (outside view) of the portable iris authentication device, and FIG. 9B is a functional block diagram of the iris authentication device main body in FIG. 9A.

In FIG. 9A, elements common to those in FIG. 1A showing the first embodiment are denoted by common reference numerals. In the portable iris authentication device 30 according to the fifth embodiment, a sound generation unit (for example, a speaker) 32 is added to the front side (that is, the front side) of the housing unit 31.

In FIG. 9B as well, elements common to those in FIG. 1B showing the first embodiment are denoted by common reference numerals. In the fifth embodiment, a control unit 70 is provided instead of the display control unit 45.

The speaker 32 generates sound under the control of the control unit 70. A control unit 70 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 70 outputs the second control signal to control the display unit 46, and displays the extraction result of the iris circle / pupil circle by the iris circle / pupil circle extraction unit 47 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. Generate sound such as counting of cues.

The iris circle / pupil circle extraction unit 47 is connected to a determination unit (for example, a stillness determination unit) 72, and a storage unit 74 such as a memory is connected to the stillness determination unit 72. The stationary determination unit 72 is stable in fluctuations in the position (for example, central coordinates) and size (for example, either a radius or a diameter) of the iris circle and the pupil circle extracted by the iris circle / pupil circle extraction unit 47. Whether the variation is smaller than the variation widths W1 and W2 stored in the storage unit 74 or not is determined, and the determination result is given to the control unit 70. In the case of the determination result that the fluctuation is stable, the control unit 70 controls the shooting timing of the registration screen with respect to the shooting unit 42 by the second control signal.

A recognition unit (for example, iris recognition unit) 48 is connected to the image capture unit 44, and a registration unit (for example, iris recognition dictionary) 49 is further 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 at the time of registration 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. Iris data is extracted from the image, and the extracted iris data is compared with the iris data registered in the iris recognition dictionary 49 to recognize whether the user is the user.

(Operation of Example 5)
10A and 10B are diagrams showing a usage state in the portable iris authentication device 30 of FIG. 9A. 10A is a side view showing a method of positioning the eye 61 within the imaging range of the portable iris authentication device 30 when the user 60 registers and authenticates the iris 61a of the eye 61, and FIG. 10B is a part of FIG. 10A. FIG. In FIG. 10A, 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.

11A and 11B are diagrams showing examples of screen display on the display screen 46a of FIG. 10A. 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 apparatus 30 according to the fifth embodiment will be described below by dividing into (A) iris data registration operation and (B) iris authentication operation.

(A) Iris data registration operation When using the portable iris authentication device 30, as shown in FIG. 10A, the user 60 holds the casing 31 with a hand 62 and performs registration processing 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. Then, 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 user is brought into an optimal eye opening / closing state). The iris data registration process is performed according to the guiding procedure.

(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 is extracted sequentially. Under the control of the control unit 70, 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, and the user 60 determines whether the iris 61a and the pupil 61b are correctly acquired. By facilitating visual recognition, the user 60 is guided to an appropriate photographing 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 70.

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 for detecting the circular shape of the iris 61a and the pupil 61b, for example, a general algorithm in the image processing field such as edge detection and Hough transform can 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 70. In response to this, the control unit 70 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. 11A.

FIG. 11A shows a state in which the detected iris circle I and pupil circle P are completely coincident with the positions of the iris 61a and pupil 61b of the actual eye image. The eye image at the time of such 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 captured image 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 detection of the iris circle I and the pupil circle P is performed correctly. Instead, as shown in FIG. 11B, 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 fifth embodiment, the iris circle I and the pupil circle P are positively displayed on the display screen 46a even in such a case. Thereby, the user 60 can intuitively grasp that the iris 61a is not correctly detected.

When the user 60 looks at the display of FIG. 11B, it is clear that the display of the iris 61a / pupil 61b in the actual eye image and the display of the detected iris circle I and pupil circle P do not match. Understandable. Therefore, it is determined that the iris 61a has not been correctly detected, and the positioning operation is continued while changing the direction of the movement angle M of the eyes 61 until these displays match as shown in FIG. 11A. . 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 72, and triggered by the detection, the display screen 46a of the display unit 46 (or the display screen 46a and the speaker 32) controlled by the control unit 70 is used as a trigger. By notifying the user 60 that shooting is to be performed, an iris image that is more suitable for registration is captured. The procedure will be described in detail below with reference to FIGS. 12A and 12B, FIG. 13, and FIGS. 14A and 14B.

12A and 12B are diagrams showing the transition of the center coordinate of the iris circle I and the variation amount of the diameter in the state of FIG. 10A. FIG. 13 is a diagram showing a display example for signaling the user 60 at the time of registration in the state of FIG. 10A. Further, FIGS. 14A and 14B are diagrams showing display examples for signaling the fine user 60 in FIG. 10A. FIG. 14A is a diagram showing a display example of an instruction for a state in which the iris 61a in the black eye part is partially hidden by the eyelid, and FIG. 14B is a table when shooting with the eyelid opened and the iris 61a in the black eye part fully exposed. It is a figure which shows an example.

When the user 60 is guided to an appropriate imaging position, the stillness determination unit 72 stores the center coordinates and 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).

12A and 12B show the transition of the center coordinate and the diameter variation of the iris circle I detected from each image frame by the stillness determination unit 72. FIG. The stillness determination unit 72 performs the following determination process using the transition data of the variation amounts of the center coordinate and the diameter.

FIG. 12A 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. Note that the allowable fluctuation range W1 of the central coordinate fluctuation amount is a numerical value (for example, several pixels) known from experience, and is stored in the storage unit 74 in advance.

FIG. 12B shows a state in which the variation amount of the diameter of the iris circle I falls within the variation range W2 that is less than or equal to the allowable variation limit V2. This is because, as with the amount of change in the central coordinates, the user 60 sees the result of the extraction of the iris circle I and the pupil circle P by the iris circle / pupil circle extraction unit 47, so that the iris circle I and the pupil circle P are 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 the storage unit 74 in advance.

The stillness determination unit 72 monitors whether or not the value of the fluctuation amount of the center coordinate has changed for a certain time within the fluctuation range W1. Thus, when 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. Is considered. Accordingly, the stillness determination unit 72 instructs the control unit 70 to shoot 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), similarly to the case of the center coordinates, the stationary determination unit 72 analyzes the transition of the fluctuation amount and determines 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. Is considered. Accordingly, the stillness determination unit 72 instructs the control unit 70 to shoot 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.

In the above 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 furthermore, both of the two variation amounts may be used simultaneously for determination.

The above determination makes it possible to confirm 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. 13 shows a display example of a cue for taking a registration image. At this time, the control unit 70 controls the display screen 46a of the display unit 46 to display a wording for shooting for registration. In addition, the control unit 70 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 turned off under the control of the control unit 70, 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 48. The iris recognition unit 48 calculates iris data from the captured image and registers it in the iris recognition dictionary 51 as registration data for later authentication.

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. 14A and 14B show display examples of cues for photographing a registration image in the case of a detail. FIG. 14A 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 superimposed on the eye image. 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 directly used for the registration process, which is problematic in terms of recognition accuracy. Therefore, as shown in FIG. 14A, a message that prompts the user 60 to open the eyes 61 wide is displayed. In accordance with this, the user 60 can widen the eyes 61 so that the actual iris portion coincides with the drawn iris circle I.

FIG. 14B shows a state in which 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. 13, 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. In addition, the arc of the iris circle I that coincides with the iris portion photographed inside the details is drawn in a fixed manner, and only the portion hidden by the eyelid blinks so that the iris circle I switches from small to large. 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 48. The iris recognition unit 48 extracts the iris data from the captured image, compares it with the iris data registered in the iris recognition dictionary 51, and recognizes whether or not the user 60 is the user.

(Effect of Example 5)
According to the fifth 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 70. It is possible to intuitively grasp whether the position of the eye 61 is correctly positioned. In addition, after the stationary determination unit 72 detects that the iris position is stable and instructs the photographing unit 42 to photograph the registered image, the eye image for registration is photographed. Therefore, an ideal iris 61a is photographed. As a result, even a user 60 who is not skilled in registration can register iris data 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 above-described embodiments, and various usage forms and modifications are possible.
For example, in the embodiment, the example in which both the iris circle and the pupil circle are extracted by the iris circle / pupil circle extraction unit and displayed on the display screen is described, but the present invention is not limited to this, and either the iris circle or the pupil circle is described. In this case, the same effect as when both are displayed can be obtained.
Further, in the embodiment, the example in which the iris authentication device

main body

40, 40A is mounted on the mobile phone has been described. However, the iris authentication device

main body

40, 40A is mounted on another mobile terminal device such as a PDA (Personal Digital Assistant) or the iris authentication device main body 40, A fixed device structure in which the function of 40A is mounted on a personal computer or the like may be used. In addition, the iris authentication device

main bodies

40 and 40A may add other functional blocks other than those shown in the drawing in order to improve accuracy and expand applications.

Explanation of symbols

DESCRIPTION OF SYMBOLS 30

Iris authentication apparatus

40, 40A Iris authentication apparatus main body 41 Input part 42 Image | photographing part 42a Camera 43 Illumination part

43a Light source

44, 44A Image capture part 44a Storage part 45 Display control part 46 Display part

46a Display screen

47, 47A Iris circle / pupil Circle extraction unit 48 Iris recognition unit 49 Iris recognition dictionary 61 Image selection unit 70 Control unit 72 Stillness determination unit 74 Storage unit

Claims

A lighting unit that emits light to the eyes of the individual;
A photographing unit that photographs the eye irradiated with the light and obtains an image of the eye;
An extraction unit for sequentially extracting iris circles and pupil circles from a plurality of images of the eyes;
A display unit that displays the sequentially extracted iris circle or pupil circle on the display screen in an overlapping manner with the plurality of eye images;
An input unit capable of inputting that the individual has confirmed the content of the display screen;
A registration unit for registering data;
When input is made from the input unit, the iris data is extracted from the eye image and registered in the registration unit, and new iris data is extracted from the new eye image acquired by the photographing unit at the time of authentication. A recognition unit that recognizes the new eye image by comparing the extracted new iris data with the iris data registered in the registration unit;
An iris authentication apparatus.
A capture unit that captures and stores a plurality of images of the eyes acquired by the imaging unit;
A selection unit that reads out the stored plurality of eye images and selects an eye image to be registered when input from the input unit;
Further comprising
The recognition unit extracts iris data from the selected eye image and registers the extracted iris data in the registration unit;
The iris authentication device according to claim 1.
3. The selection unit according to claim 2, wherein the selection unit reads a plurality of eye images stored by the capture unit within a predetermined time before and after the input, and selects the eye image to be registered. Iris authentication device.
The selection unit reads out images of a plurality of eyes stored by the capture unit within a predetermined time before and after the input is performed, displays the images on the display screen, and becomes a registration target for the individual The iris authentication apparatus according to claim 2, which prompts the user to select an eye image.
The selection unit reads a plurality of eye images stored by the capture unit within a predetermined time before and after the input is performed, selects a predetermined number of the eye images to be registered, and displays the display screen. The iris authentication apparatus according to claim 2, wherein the iris authentication apparatus prompts the individual to select an image of the eye to be registered.
The iris authentication apparatus according to claim 2, wherein the selection of the eye image is performed based on a movement amount of an iris center coordinate in each of the stored images of the plurality of eyes.
3. The iris authentication apparatus according to claim 2, wherein the selection of the eye image is performed based on a change amount of an iris diameter in each of the stored plurality of eye images.
3. The iris authentication apparatus according to claim 2, wherein the selection of the eye image is performed based on a size of an iris diameter in each of the stored plurality of eye images.
3. The iris authentication apparatus according to claim 2, wherein the selection of the eye image is performed based on an iris expression rate in each of the stored plurality of eye images.
3. The iris authentication apparatus according to claim 2, wherein the selection of the eye image is performed based on a degree of focus in each of the stored plurality of eye images.
A lighting unit that emits light to the eyes of the individual;
When registering eye iris data, based on the first control signal, the eye irradiated with the light is photographed to obtain a first eye image, and when eye iris data is authenticated, the light is based on the photographing start signal. A photographing unit for photographing the eye irradiated with a light to obtain a second eye image;
An extraction unit for sequentially extracting an iris circle and a pupil circle from the plurality of first eye images;
Based on a second control signal, a display unit that displays the sequentially extracted iris circle or pupil circle on the display screen so as to overlap each of the plurality of first eye images;
A registration unit for registering the iris data;
A determination unit that monitors changes in the position and size of the iris circle or the pupil circle corresponding to the plurality of first eye images, and determines whether the change is smaller than a predetermined amount;
At the time of registration, the second control signal is output to control the display unit, and when the determination result is “smaller than a predetermined amount”, the first control signal is output to control the photographing unit. A control unit to control;
At the time of registration, the iris data is extracted from the acquired first eye image and registered by the registration unit. At the time of authentication, the iris data is extracted from the second eye image, and the extracted iris data is extracted. And a recognition unit that recognizes the second eye image by comparing the iris data registered by the registration unit,
An iris authentication apparatus.
A capture unit that captures the first and second eye images acquired by the imaging unit;
The extraction unit, the determination unit, and the recognition unit perform processing on the captured first and / or second eye images.
The iris authentication device according to claim 11.
12. The iris authentication apparatus according to claim 11, wherein the control unit causes the display unit to perform a display to signal the individual prior to photographing of the eye by the photographing unit at the time of registration.
12. The iris authentication apparatus according to claim 11, wherein the control unit causes the individual to generate a cue count from a sound generation unit prior to photographing of the eyes by the photographing unit at the time of registration.
Prior to the signal, the control unit causes the extracted iris circle or pupil circle to be displayed on the display unit, and causes the display unit to display a word prompting the individual to open a eyelid. Item 14. An iris authentication device according to item 13.
The iris authentication apparatus according to claim 11, wherein the control unit causes the extracted iris circle to blink and display on the display unit in order to allow the individual to recognize the presence of the extracted iris circle or pupil circle. .