KR20150077179A - Device for photographing an Iris and Iris Authentication Device - Google Patents

Abstract

The present invention relates to an apparatus for capturing an iris which is a type of biometric data, capable of acquiring an iris image of a required size when recognizing the iris by filming the iris, which is a subject, by adding a view angle adjusting pipe to a single vision lens in order to acquire a clear iris image, and furthermore capable of acquiring the clear iris image by adding a band pass filter only enabling to penetrate an infrared ray of a certain infrared ray wavelength range and a visible ray of a bluish visible ray wavelength range to a front end of the single vision lens when filming a bluish iris as well as a brownish iris.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iris photographing apparatus,

The present invention relates to a device for photographing iris, which is a type of biometric information. In order to secure a clear iris image, an iris image is photographed by adding an angle-of- In addition, a band-pass filter capable of transmitting only infrared rays of a predetermined infrared wavelength band and visible light of a blue wavelength range can be added to the front end of the short focal lens to capture a blue iris as well as a brown- Thereby obtaining an image.

Identification systems are used to authenticate and access access to buildings and access or use of machines or data to maintain access and control security. In the conventional identification system, a password is inputted or a user is authenticated through a card or the like. In recent years, biometrics authentication using a biological characteristic of a person has been widely used to enhance security. In the case of such biometric authentication, the identity of a person such as fingerprint, voice, facial pattern, vein pattern and iris of the user is recognized and compared with the registered data, thereby confirming the identity of the person to be authenticated. Particularly, irises of human beings have different patterns. These iris patterns have characteristics that they are completed between 2 and 3 years after birth and hardly changed thereafter. In terms of diversity and discrimination

There is a significant advantage over other human features. Recently, various techniques have been proposed to identify the identity of a user using iris where a high level of security is required such as a building entrance or a bank safe.

A typical configuration of the ID verification system through the iris authentication includes a photographing device for photographing an iris pattern of the subject, a storage unit for converting the captured iris image into a digital code and storing the same, a stored original iris image, The iris recognition ID system compares the iris image photographed through the photographing apparatus with the original iris image registered in advance and confirms the identity of the iris image, Is a very important factor.

In general, iris imaging apparatus transmits infrared rays having a predetermined wavelength band over a predetermined amount to acquire an iris image by photographing an iris. However, most of the iris of the subject is mainly brown, but some have iris having blue color. However, since iris imaging apparatuses so far transmit only infrared rays, it is sufficient to photograph iris of brownish iris. However, when iris image of blue iris is photographed, iris image of the captured color is converted into black- The color of the color is expressed only in a dark color, and iris image can not be obtained clearly, which causes a problem that the iris recognition fails.

Of course, iris authentication photographing apparatuses which transmit not only infrared rays but also visible rays have been developed. An example thereof is disclosed in the first patent document below. Since the imaging device described in the patent is characterized not only for iris authentication but also for general cameras, infrared rays as well as visible rays pass through the filter. Accordingly, the color image can be photographed by the visible light in the wavelength range of 400 to 750 nm, and the iris image can be photographed by using the infrared ray in the wavelength range of 750 to 1000 nm.

 However, the problem is that iris images as well as infrared rays are transmitted through the iris imaging mode, and visible light rays of all wavelength ranges ranging from 400 nm to 750 nm are transmitted as well as blue wavelengths, so that iris images of the brown- Which is a disadvantage in obtaining a clear iris image.

The second patent document also discloses an invention that can be used as a camera for general cameras and iris authentication, and also discloses a configuration for transmitting both infrared rays and visible rays. However, the patent adopts a separate structure for blocking visible light when used for iris authentication, and it has a problem in that the configuration is complicated, the manufacturing cost is increased, and the visible light is completely blocked. It is still difficult.

On the other hand, the conventional iris imaging apparatus has an induction means (usually a separate light emission means or an audio means) for guiding the subject to enter a predetermined photographing distance when photographing a subject, and when the subject enters the photographing distance, And then the subject is photographed. Therefore, the user has to inconveniently stop the movement when it is located at the photographing distance for the iris photographing. In addition, although there is a means for inducing the user to stop the motion, iris image required for iris authentication can not be acquired when the user moves due to insufficient use, so that iris authentication fails or iris photography must be repeated several times There was an inconvenience.

Korean Patent Registration No. 10-729813 Korean Patent Publication No. 10-2005-0102338

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the conventional art described above, and it is an object of the present invention to provide a single-focal lens that can capture an iris image of a sufficient size required for iris authentication, And a focus can be fixed, so that it is possible to obtain a large iris image with a low manufacturing cost and a compact size.

It is another object of the present invention to provide a bandpass filter which transmits only blue visible light rays together with infrared rays to obtain a clear iris image when a blue iris is imaged and further, visible light of a wavelength band other than the blue- Thereby preventing irregularity or distortion of the acquired iris image.

It is still another object of the present invention to provide an apparatus and a method for acquiring an iris image of a blue-based iris even in a dark environment by additionally providing a blue-based light- Device.

It is still another object of the present invention to provide an iris photographing apparatus which can perform iris photographing of a large image using an angle-of-view adjusting pipe which can be mounted also on an iris photographing apparatus using a conventional short focal lens.

It is still another object of the present invention to provide an iris photographing apparatus capable of easily and quickly assembling or disassembling the infrared light emitting means and the band pass filter disposed in front of the lens through a lens holder which can be simultaneously held by the lens holder, .

It is still another object of the present invention to provide an iris authentication module having an iris image acquisition unit on a terminal to acquire an iris image at a moment when a user passes through a specific point even if the user does not stop at a specific point, And an iris authentication device having an iris imaging device with increased convenience and improved efficiency of iris authentication.

The present invention includes the following embodiments in order to achieve the above object.

According to one embodiment of the present invention, there is provided an iris photographing apparatus including a lens, a band-pass filter, an image pickup device, and an infrared light emitting means, wherein an image angle adjusting pipe for narrowing the angle of view of the lens between the lens and the image pickup device .

According to another embodiment of the present invention, the angle-of-view adjusting pipe increases the back focal distance of the lens so that the iris can be photographed larger, and the lens is a short focal lens.

According to another embodiment of the present invention, the angle-of-view adjusting pipe further includes a coupling portion at both ends of the angle-of-view adjusting pipe so as to be mounted on a lens of a conventional iris photographing apparatus.

According to another embodiment of the present invention, the present invention is characterized in that the lens and the infrared light emitting means are mounted in one housing, and the band-pass filter transmits only 850 nm infrared light and 400 to 480 nm visible light, It is possible to acquire a clear iris image at the time of photographing.

According to another embodiment of the present invention, the band-pass filter of the present invention is formed of a double-ferris filter type in order to increase the transmittance of visible light of a blue color system.

According to another embodiment of the present invention, the band-pass filter covers the lens and the front surface of the infrared light emitting unit at the same time and blocks the red light from being transmitted to the outside from the light emitted from the infrared light emitting unit, So that the inconvenience caused by the infrared illumination can be eliminated.

According to another embodiment of the present invention, the bandpass filter further includes a mirror layer for allowing the user's iris to be mirrored so that the user can place the iris in the field of view angle while looking at the lens .

According to another embodiment of the present invention, the present invention further includes a blue light emitting means for emitting visible light of the blue color system, wherein the blue light emitting means irradiates light toward the iris.

According to another embodiment of the present invention, the present invention further includes a lens holder for holding the lens portion, wherein the lens holder has a " contour " .

 According to another embodiment of the present invention, there is provided an iris photographing apparatus comprising: an iris photographing apparatus as described above; and a terminal connected to the iris photographing apparatus by wired / wireless connection to perform an authentication by receiving an iris image, A photographing and maintenance unit for continuously performing photographing when it is determined that the iris image is an iris image; and a plurality of iris images when the photographed image is determined as an iris image by the imagination iris determination unit, And an iris image acquisition unit including an iris selection unit for determining a clear iris image by comparing and stopping the image capture.

According to another embodiment of the present invention, the iris determining unit may analyze the density of black dots in the photographed image and determine the iris image as a iris image if the iris image has a predetermined reference value or more. The iris selection unit compares the density of the selected iris image And the iris image having the high density is determined as the final iris image.

 The objective of the present invention is to provide a short focus lens with an angle of view adjuster for narrowing the focus of the short focus lens so as to capture an iris image of a sufficient size required for iris authentication, It is possible to obtain an effect of acquiring a large iris image.

The present invention is based on the finding that when a blue-color iris is imaged by attaching a band-pass filter which transmits only blue visible light with infrared rays, a clear iris image can be obtained, and furthermore, visible light of wavelengths other than blue- It is possible to prevent the iris image from being blurred or distorted.

The present invention further provides a blue-based light-emitting means to acquire a bright blue-based iris image even in the absence of visible light, so that blue-based iris photography can be performed even in a dark environment.

 The present invention has an effect of providing an iris photographing apparatus capable of taking a large image of an iris by using an angle-of-view adjusting pipe that can be mounted also on a photographing apparatus using a conventional single-focal lens.

The present invention has the effect of facilitating assembly and disassembly more easily, quickly, and firmly through a lens holder that can be simultaneously held by the lens holder in positioning the band-pass filter at the front end of the infrared light emitting means.

The present invention is equipped with an iris authentication module having an iris image acquisition unit on a terminal so that the user can acquire an iris image at the moment when a user passes through a specific point even if the user does not stop at a specific point and use the acquired iris image for iris authentication, The efficiency of the iris authentication is improved.

1 is a schematic diagram of an iris photographing apparatus and an iris recognition apparatus according to an embodiment of the present invention;
2 is a perspective view of an iris photographing apparatus according to an embodiment of the present invention;
3 is a perspective view of an imaging module of an iris imaging apparatus according to an embodiment of the present invention.
Figure 4 is an exploded perspective view of the photographing module of Figure 3;
5 is an assembled sectional view of the photographing module;
6 (1) shows a conventional iris photographing apparatus and (2) shows a view angle and an iris image size when an iris is imaged by an iris photographing apparatus according to an embodiment of the present invention.
FIG. 7 (1) is an image taken using a short-focus lens without an angle-of-view adjusting pipe; and (2) is a photograph of an iris image taken after an angle-of-
8 is a graph of visible light transmittance at 850 nm infrared and 400-480 nm blue.
FIG. 9 is a photograph of a blue iris using a band-pass filter that transmits only 850 nm infrared rays. FIG.
FIG. 10 is a photograph of a blue iris using a band-pass filter that transmits both 850 nm infrared light and visible light of 400 to 750 nm all wavelengths.
11 is a photograph of a blue-type iris using a band-pass filter that transmits only visible light of 850 nm infrared and 400 to 480 nm blue.
Fig. 12 shows another embodiment of the present invention. Fig. 12 is a view of a photographing apparatus equipped with light emitting means for emitting a blue-based light so that a blue-colored iris can be clearly photographed even in a dark environment.
13 is a block diagram of an iris authentication apparatus according to another embodiment of the present invention.
Fig. 14 is a schematic view of an iris authentication device having an iris imaging module that enables acquisition of an iris image even if the user continuously moves without having to stop at a predetermined photographing distance, according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Applicants will now describe embodiments of the present invention with reference to the accompanying drawings.

As shown in Fig. 1, the iris authentication apparatus of the present invention includes an iris photographing apparatus 1 for photographing an iris and a terminal 2 for performing authentication using a photographed iris image.

2, the iris photographing apparatus 1 is a camera for photographing an iris of a user and generates an iris image by photographing an iris. The iris photographing apparatus 1 includes a photographing module 10 built in the housing 30 do.

4, the photographing module 10 includes a lens unit 12 in which a lens is mounted, a lens holder 15 in which the lens unit 12 is mounted, a lens holder 15 disposed in front of the lens unit, And a circuit board 16 connected to the rear end of the angle-of-view adjusting pipe 13 and having an image pickup element. The band-pass filter 11, the angle-of-view adjusting pipe 13 connected to the rear end of the lens,

The lens unit 12 includes a lens 121 and a lens case 122 for fixing the lens. The lens case 122 has a coupling portion 122a having a thread on the outer peripheral surface at the rear end thereof. The lens 121 uses a short focal length lens having a short focal length of 35 mm or less. Since the single-focal lens has a wide angle of view and a small image size, iris images required for iris authentication can not be obtained. Therefore, such a problem is solved by adding the angle-of-view adjusting pipe described below.

The angle-of-view adjusting pipe 13 is a cylindrical tube having a female thread 131 to be connected to the rear end of the lens case 12 at the front end thereof and has a coupling portion 132 which is fastened to the circuit board 16 at the rear end. The coupling portion may have a screw thread on the outer circumferential surface and may be screwed to the circuit board, or another method may be used. If the length of the back focal length is short, the short focus lens is focused infinitely after a certain distance so that the subject is photographed small and is not suitable for iris photography, so that it can not be used for iris photography . Of course, although the position of the lens can be manually or electrically moved to adjust the post-focal distance to be used for iris imaging, adjusting the position of the lens for iris imaging has a problem that it is cumbersome and requires additional configuration. However, in order to solve the above-mentioned problem caused by the use of the single-focal lens 121 for iris imaging, the present invention further includes an angle-of-view adjusting pipe 13 to reduce the angle of view by increasing the focal length, Thereby obtaining a large iris image at the same photographing distance (see FIGS. 6 and 7).

In addition, the angle-of-view adjusting pipe has a coupling portion at the front end and a rear end so as to be mountable to a photographing device such as a camera using a conventional lens, so that it can be mounted on a lens of a conventional iris photographing camera, The effect can be obtained.

The circuit board 16 has an imaging element and a substrate 161 on which various circuits for supplying power to the imaging element and performing signal processing are designed and have a coupling portion 162 to which the view angle adjustment tube 13 can be coupled have. The coupling portion 162 is formed in a structure that can be coupled to the coupling portion 132 of the angle-of-view adjusting pipe. The coupling portion 132 of the angle-of-view adjusting pipe has a male thread, and the coupling portion of the circuit board has an arm or an anchor. Other coupling methods such as bolt coupling can be adopted.

The lens holder 15 includes a lens coupling portion 151 for receiving and supporting the front end of the lens portion 12 and an infrared light emitting means coupling portion 153 for attaching the infrared light emitting means 14 to the lower side of the lens holder 15 . The lens coupling portion 151 is formed with a through hole having a shape complementary to the outer shape of the lens portion at the center so as to insert the front end of the lens portion 12 and has a band pass filter to be described later on the upper and lower sides of the through hole. Quot; cross-section. In addition, the infrared ray emitting means coupling portion 153 has a grasping portion 153a having an "┌┐" cross section on the upper side and left and right sides thereof with the infrared ray emitting means 14 inserted therein. The upper band-pass filter 151a and the lower band-pass filter 153a maintain the state where the lower band-pass filter is firmly accommodated.

The band-pass filter 11 can take irises of a blue-based iris as well as irises of a brown-based iris. In order to obtain bright iris image of brown type, only 80% of infrared rays are transmitted at 850 nm, and all the visible rays other than 400 to 480 nm blue series are blocked, thereby blocking iris image blur due to visible rays. Is transmitted at a rate of 80% or more, so that a clear blue iris image can be obtained. It is important to transmit light with a transmittance of 80% or more and selectively transmit light. The above band-pass filter is a Fabry-Perot type filter in which reflection interference faces are opposed to each other at intervals of a predetermined thickness. In order to increase the visible light transmittance of the blue series, the band-pass filter is formed in a double-

The band-pass filter includes a filter 111 for a lens and a filter 112 for an infrared light-emitting means, both of which have the same optical characteristics.

5, the filter 111 for the lens is fixed to the groove of the grip 151a of the lens holder while the filter 112 for the infrared ray emitting means is gripped by the grip 153a, As shown in Fig. When the filter is inserted from the lower side and the filter is pushed upward, the grooves on the left and right sides function as a guide surface, and after the insertion, the grip portion 153a functions as a guide surface, So that it is firmly supported. The filter 112 for infrared ray emitting means is located at the front end of the infrared ray emitting means to cut off the red light of the infrared ray emitting means so that the user can feel the burden felt by the infrared ray emitting means.

Further, according to another embodiment of the present invention, the lens filter 111 may further have a mirror layer on the surface. The mirror layer functions like a mirror that allows a user's appearance to appear on the lens, which, when the user sees the filter, projects his or her own image of the filter and, when approaching the shooting distance, Thus, it is possible to control the position of the eye by looking at the mirror eye's own eyes, thereby reducing the accuracy and trial-and-error of iris photography. Since the coating technique of the Miller layer is a general technique, a detailed description thereof will be omitted.

Hereinafter, an experimental example of the band-pass filter of the present invention will be described.

Experimental conditions:

Test Example: The distance from the back of the lens to the image sensor of the circuit board was 22 mm, the focal length was 12.2 mm, and the bandpass filter (manufactured by Samhwa Optical Co., Ltd., 850 nm infrared and 400-480 nm visible light %). The iris having an iris diameter of 10 mm at a photographing distance of 20 cm was photographed (see (2) in FIG. 6).

Comparative Example 1 A 16 mm short focus lens was mounted on a circuit board without an angle adjuster. The distance from the back of the lens to the image sensor of the circuit board was 15 mm and the focal length was 5.5 mm. An iris having a diameter of 10 mm was photographed using the applied imaging module (see (1) in FIG. 6).

COMPARATIVE EXAMPLE 2 Although the same conditions as in Test Example 1 were taken, a band-pass filter produced by Samhwa Optics, which transmits only 80% of infrared light at 850 nm, was used.

COMPARATIVE EXAMPLE 3 Although the same conditions as in Test Example 1 were taken, the filter was photographed using a band-pass filter manufactured by Samhwa Optics, which transmits at least 80% of visible light of 850 nm infrared and a radio wave.

Test equipment: Hitachi's U4100 spectrophotometer

Measurement of permeation amount: The intensity of incident light is set at 100, and the intensity of light passing through the sample is measured and expressed as a percentage. The light source uses a tungsten filament to emit a continuous spectrum of 320 to 2,600 nm. PMT (photomultiplier) is used as the detector.

Experiment result

FIG. 6 (1) is a view showing Comparative Example 1, showing the characteristics of a single-focal lens, and FIG. 6 (2) is a view showing a test example. FIG. 7 (1) is an iris image taken by using the photographing module of the comparative example 1, and FIG. 7 (2) is an iris image taken by using the photographing module of the test example.

As can be seen from FIG. 6 (1), if the angle-of-view adjusting tube is not used while using the short-focus lens, the focus becomes infinite at a certain distance, and the angle of view becomes wide and the image becomes small. 7 (1) is an iris image taken at a photographing distance of 20 cm, and the iris is located within the focal distance of the corresponding lens, so that the photographed image is blurred (the short focal point has an infinity at a certain distance, The object within the focal point is photographed faintly). Also, FIG. 7 (2) can obtain a clear iris image as compared with (1).

8 is a graph showing spectral characteristics of the band-pass filter of Test Example 1 with the use of a spectrometer. It is confirmed that 80% or more of visible light of 400 to 480 nm and 850 nm of infrared are transmitted.

Figs. 9 to 10 are iris image photographs obtained by photographing irises of the blue series with the imaging modules of the comparative example 2, the comparative example 3, and the test example, respectively. FIG. 9 is an iris image taken by a photographing module of Comparative Example 2 using a filter which transmits only 850 nm infrared rays, and is not suitable for iris authentication because the pupil pattern of the iris is not identified. FIG. 10 shows a case where the infrared ray and visible light A pupil pattern of the iris is seen as an iris image taken by the photographing module of Comparative Example 3 using a filter that transmits the iris image, but the iris image is slightly blurred by the visible light. Which shows a remarkably clear image quality as compared with Comparative Examples 2 and 3.

Through the above experiment, applicant confirmed that it is possible to acquire a large iris image by using the angle-of-view adjusting tube, and the case of using the filter which transmits only 850 nm infrared ray or the visible ray of 850 nm infrared ray and propagation field It is confirmed that a clear blue iris image can be obtained when a filter which transmits only 850 nm infrared rays and 400-480 nm visible rays is used.

12 is a view showing still another embodiment of the present invention. All other components are the same as those of the present embodiment, and the present embodiment further includes a blue light emitting means 17 for emitting visible light of the blue series. This is to acquire a blue iris image in a clear blue state by emitting a blue light and shooting a blue iris even when there is no visible light such as nighttime.

13 is a schematic diagram of an iris authentication apparatus according to another embodiment of the present invention. Referring to FIG. 13, the iris authentication device includes the iris imaging device 1 and the terminal 2 described above.

The terminal 2 is a device for performing authentication using an iris image transmitted from the iris imaging device 1, and includes a mobile phone, a smart phone, a tablet PC, and the like. The terminal 2 includes an iris authentication module 20 for performing iris authentication using the received iris image.

The iris authentication module 20 includes a control unit 21, an iris image acquisition unit 24, an authentication unit 22, and a storage unit 23.

The control unit 21 generally controls the terminal and performs image processing of the received iris image. The authentication unit 22 compares the received iris image with a previously stored iris image to determine whether the user is a genuine user And stores the various iris images stored in the storage unit 23 at any time.

The iris image obtaining unit 24 determines whether the photographed subject is an iris or not and selects the brightest iris image among the photographed iris images. The iris determining unit 241, the photographing continuation unit 242, the iris selection unit 243).

When the iris image pickup device 1 transmits the image of the approaching object toward the shooting distance D to the terminal 2 without taking the image, the iris determination unit 241 obtains, from the image of the subject sent from the iris image pickup device, The density of the points is determined. If the density is equal to or higher than the reference value, it is determined that the iris is the iris image, the iris image is determined as the iris image, and the imaging start signal is transmitted to the iris imaging device 1 through the control unit 21, Starts shooting at about 30 frames per second.

When the photographed image is judged to be an iris image, the photographing continuation unit 242 transmits a signal through the control unit so that the iris photographing apparatus continuously photographs the subject and transmits the photographed image.

The iris selection unit 243 compares the iris images transmitted from the iris image pickup device to select an image having the highest density of black points as a final iris image and sends a photographing stop signal to the iris photographing device through the control unit .

As shown above, since the iris image acquiring unit starts the iris image capturing, selects the iris image, and stops the image capturing, the user performs a series of processes such as (1) When the image transmitted as approaching is determined to be an iris image, the imaging is started and the iris image having the maximum black dot density is picked up as soon as it passes the imaging distance D as in (2) It is not necessary to stop near the distance D, and it is naturally possible to pass through the point as in (3) or retreat back to the direction of (1). Therefore, it is not necessary to take the inconvenience of stopping at a specific position of the photographing apparatus for iris photographing. The iris photographing apparatus does not need to have a visual means or auditory means for guiding the user to stop at a specific position, The manufacturing cost can be reduced and the size can be made compact.

While the applicant has described various embodiments implementing the technical idea of the present invention, the present invention is not limited to the above embodiments, but may be variously modified and modified.

1: iris imaging device, 2: terminal

Claims (11)

An iris photographing apparatus comprising a lens section, a circuit board having an image pickup element, and a photographing module including infrared light emitting means,
Wherein the photographing module further comprises an angle-of-view adjusting pipe for narrowing the angle of view of the lens between the lens and the imaging element. 2. The iris photography apparatus according to claim 1, wherein the angle of view adjuster allows the iris to be photographed larger by increasing the focal length of the lens, and the lens is a short focal lens. 3. The iris imaging apparatus according to claim 2, wherein the angle-of-view adjusting pipe further has a coupling portion at both ends thereof so as to be mounted on a lens of a conventional iris imaging apparatus. The iris image pickup apparatus of claim 3, wherein the iris imaging apparatus further comprises a band-pass filter, wherein the band-pass filter transmits at least 80% of visible light of 400 to 480 nm and 850 nm of infrared light to obtain a clear iris image The iris image. The iris image pickup apparatus according to claim 4, wherein the band-pass filter is configured as a double-ferris filter type in order to increase the transmittance of a blue-based visible ray. 5. The apparatus of claim 4, wherein the band-pass filter covers the lens and the front surface of the infrared light emitting unit at the same time and blocks the red light from being transmitted to the outside from the light emitted from the infrared light emitting unit, The iris image is displayed on the screen. 5. The iris image pickup apparatus according to claim 4, wherein the band-pass filter further includes a mirror layer for allowing the iris of the user to be mirrored so that the user can position the iris by himself / . The iris imaging apparatus according to claim 4, further comprising a blue light emitting means for emitting a blue light of visible light, wherein the blue light emitting means emits light toward the iris. The lens holder according to claim 4, further comprising a lens holder for gripping the lens portion, wherein the lens holder has a cross-section so as to hold a band-pass filter at a front end of the lens, Is mounted on one housing. An iris photographing apparatus comprising: an iris photographing apparatus according to any one of claims 1 to 10; and a terminal connected to the iris photographing apparatus by wired / wireless connection to perform an authentication by receiving an iris image,
The imaging device comprising: an iris determination unit for determining whether the photographed image is an iris image; a photographing maintenance unit for continuously photographing the photographed image when it is determined that the iris image is an iris image; And an iris image acquisition unit for comparing the plurality of iris images to determine a clear iris image and stopping the image capture. The apparatus of claim 10, wherein the iris determination unit analyzes the density of black spots in the photographed image, determines the iris image as an iris image if the density is higher than a predetermined reference value, and the iris selection unit compares density among the selected iris images, And determines the final iris image as a final iris image.

Images