KR20160116106A - Mobile device having camera dedicated for iris identification - Google Patents

Mobile device having camera dedicated for iris identification Download PDF

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Publication number
KR20160116106A
KR20160116106A KR1020150041690A KR20150041690A KR20160116106A KR 20160116106 A KR20160116106 A KR 20160116106A KR 1020150041690 A KR1020150041690 A KR 1020150041690A KR 20150041690 A KR20150041690 A KR 20150041690A KR 20160116106 A KR20160116106 A KR 20160116106A
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KR
South Korea
Prior art keywords
iris
image
user
camera
authentication
Prior art date
Application number
KR1020150041690A
Other languages
Korean (ko)
Inventor
김성현
이기열
Original Assignee
주식회사 이리언스
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Application filed by 주식회사 이리언스 filed Critical 주식회사 이리언스
Priority to KR1020150041690A priority Critical patent/KR20160116106A/en
Publication of KR20160116106A publication Critical patent/KR20160116106A/en

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    • G06K9/00597—
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
    • G06F21/31—User authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0264—Details of the structure or mounting of specific components for a camera module assembly
    • H04M1/72522—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2203/00—Aspects of automatic or semi-automatic exchanges
    • H04M2203/60—Aspects of automatic or semi-automatic exchanges related to security aspects in telephonic communication systems
    • H04M2203/6054—Biometric subscriber identification

Abstract

According to the present invention, a mobile communication terminal including a camera only for photographing an iris includes: a communication unit; a display unit which includes an image display surface; a normal photographing unit which generates a normal image; an iris photographing unit which includes a camera only for photographing an iris towards the front and photographs the front sides at certain time intervals; and a main control unit which executes a normal photographing application for storing the normal image if the execution of the normal photographing function is selected by user operation, sets a part of the image display surface as an eye display area and sets a part of the area except for the eye display area as a surrounding area if the execution of the iris authentication function is selected by the user operation, separates the iris image corresponding to the iris of the user from the front image generated in real time, displays the iris image in the eye display area, displays if the current iris image is available for iris authentication in the surrounding area in real time, and executes an iris authentication application for performing iris authentication.

Description

TECHNICAL FIELD [0001] The present invention relates to a mobile communication terminal equipped with an iris photographing camera,

The present invention relates to a mobile communication terminal having an iris imaging camera, and more particularly, to a mobile communication terminal having an iris imaging camera for generating an iris image to be used for iris authentication in addition to a general camera.

The iris authentication system distinguishes the iris patterns unique to each person and proves their identity. The ID verification system is superior to other biometrics methods such as voice and fingerprint identification and has high security. The iris is a region existing between the pupil and the white of the eye. The iris authentication is a technique of recognizing the identity of an individual based on the information of each iris pattern analyzed for each individual.

In addition, recently popularized smartphones offer a variety of functions. These include security features that can only be accessed by smartphone owners (legitimate users). Examples of security functions include execution of a specific function or application of a smart phone, access protection to secret data, authentication processing to a security server through a communication network, and the like.

Korean Patent Laid-Open No. 10-2014-0133762 (entitled "IRIS RECOGNITION METHOD AND APPARATUS USING A CAMERA FOR REMOTE IRIS IMAGING OF A SMART PHONE") is a conventional technology for adding an iris authentication function to such a smart phone. In the prior art, a smart phone body is formed of a conventional touch screen, a general signal display unit is formed on one side of the smart phone body, and an iris recognition unit is formed on the other side of the smart phone body. The iris recognition device using a camera for a short distance iris of a smartphone is provided.

In this conventional technique, when the user brings his / her eyes to the iris recognition device, it is possible to judge the proper distance and position only by empirically observing the authentication success or failure, And whether or not it would be possible to position it in the correct position after changing the position.

Accordingly, when the user attempts to authenticate the iris using a conventional smart phone, the user tries to perform troublesome operations of turning the smart phone around or near the user's eyes while circling the user's eyes.

Korean Patent Publication No. 10-2014-0133762

In order to solve the above problems, in a mobile communication terminal equipped with a camera for iris imaging according to the present invention, it is desired to improve the accuracy and success rate of iris authentication by applying a dedicated camera specialized for iris photography to a mobile communication terminal.

Further, in the present invention, it is possible to confirm in real time how a user's own eye is being photographed, so that an iris image can be obtained optimally.

In addition, the present invention intends to enable an authentication process using an optimal iris image by selectively using an infrared ray-captured image and an infrared ray-removed image of a user's iris.

According to an aspect of the present invention, there is provided a mobile communication terminal including a camera dedicated to iris photography, including: a communication function unit for providing voice and data communication functions through a mobile communication network; A display unit having an image display surface for visually displaying an image to a user; A general photographing unit for photographing a forward direction by a user's operation to generate a general image; An iris capturing unit independently configured with the general photographing unit and having a forward-facing iris photographing camera and generating a forward image photographed forward at predetermined intervals; And (1) when the execution of the general photographing function is selected by the user's operation, the general photographing application displaying the general image on the image display surface and storing the general image displayed by the user is executed 2) When the execution of the iris authentication function is selected by the user's operation, a part of the image display surface is set as the eye display area, a part other than the eye display area is set as the peripheral area, The iris image corresponding to the iris part of the user is separated and displayed in real time on the eye display area, and in the peripheral area, it is displayed in real time whether the iris image currently displayed is usable for iris authentication processing, Extracts the iris feature points from the corresponding iris image, Executing an iris authentication application for performing an iris authentication process for comparing an iris feature point with a registered iris feature point of a previously registered user and generating an iris authentication result according to coincidence; (3) A main control unit for processing a data communication function; .

Here, the iris photographing camera of the iris photographing section has a viewing angle in a range of 15 to 45 degrees and a focal distance in a range of 10 to 30 cm.

In addition, the iris authentication application may be configured such that the degree of deviation of the user's eyes in a predetermined direction from the photographing optical axis of the camera, the degree to which the user's eyes are located close to or far from the focal distance of the camera, The peripheral area may be displayed in an arbitrary color, or the displayed color may be blinked or arbitrary characters may be displayed depending on the degree of darkness or brightness.

The iris photographing unit may further include an IR LED for irradiating infrared rays forward and an IR filter for selectively blocking or passing infrared rays incident on the image sensor of the camera under the control of the iris authentication application .

It is preferable that the iris authentication application is configured to control the operation of the IR filter of the iris image capturing unit, to detect an iris image obtained after blocking infrared rays through the IR filter in front of the image sensor, The IR filter is removed to select an iris image that is expected to generate a better authentication result in the iris authentication process among the iris images obtained by including the infrared ray, and is used for the iris authentication process.

Further, the iris image capturing section may include an authentication chip storing predetermined unique information, and when the execution of the iris authentication function is selected, the iris authentication application may transmit the iris authentication information, And receives the forward image from the iris capturing unit when both are identical.

The communication function unit may provide a wired or wireless communication interface with a communication port of the computer, and the main control unit may synchronize the iris authentication application with a security function processed in the computer, The iris authentication process is performed and the generated iris authentication result is transmitted through the communication interface.

The iris photography camera further includes an IR filter for intercepting infrared rays incident thereon, an IR LED for irradiating infrared rays toward the front, and an authentication chip for encrypting the forward image with an embedded encryption algorithm .

According to the mobile communication terminal having the camera for iris photography according to the present invention having the above-described configuration, accuracy and success rate of iris authentication can be improved by using a dedicated camera specialized for iris imaging. This allows the user to be authenticated as a legitimate user by minimal attempt.

In addition, since the user can confirm in real time how his / her eyes are being photographed, the iris can be photographed at the optimum position. This can minimize the movement of the user when attempting iris authentication, improve the accuracy of the iris authentication, and shorten the time from the authentication attempt to the authentication completion.

In addition, since the iris of the user is photographed through the IR filter, the IR filter is removed, and the authentication process is performed using the optimal iris image, iris authentication accuracy is improved and the frequency of failure It decreases.

FIG. 1 is a view schematically showing the outer appearance of a mobile communication terminal equipped with a camera for iris photography according to the present invention.
2 is a block diagram schematically illustrating a structure of a mobile communication terminal equipped with an iris photography camera according to the present invention.
3 is a flowchart illustrating an operation of a mobile communication terminal equipped with an iris photography camera according to the present invention.
4 is a diagram for explaining the characteristics of the iris photography dedicated camera constituting the iris photographing section in the present invention.
5 is a view showing an embodiment of an iris photography dedicated camera according to the present invention.
FIG. 6 is a view for explaining a display form of an iris authentication application driven in the mobile communication terminal according to the present invention.

Hereinafter, a preferred embodiment of a mobile communication terminal having an iris photography camera according to the present invention will be described with reference to the accompanying drawings. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments of the invention only and is not intended to be limiting.

First, with reference to FIG. 1, the outline of a mobile communication terminal equipped with a camera for iris photography will be described. The mobile communication terminal 100 having the camera for exclusive use of the iris according to the present invention has the image display surface 120 occupying most of the area in front (direction in which the user mainly looks at the mobile communication terminal). The other circumferential portion may include a plurality of cameras arranged to face the user.

One of the cameras may be a commercially available camera 140 capable of capturing a general image provided in most of the mobile communication terminals 100. Another camera may be the iris photographing camera 150 proposed by the present invention.

A general commercial camera 140 can be configured to focus on a wide range from near to far. For this purpose, the camera 140 may be provided with an actuator capable of changing the position of an internal optical device (e.g., a lens) for automatic focus adjustment. In addition, the camera 140 may include an infrared cut filter (IR filter), which can be kept inserted into the photographing optical axis of the camera. Accordingly, the camera 140 can always generate an image in which infrared rays are blocked, that is, an image composed only of visible light. In other words, the image in which the infrared rays taken by the camera 140 are removed has the same color as the object viewed by the user.

In addition, the camera 140 may have a wide viewing angle and a large resolution so as to photograph a wide range in front of the camera 140. This requires high precision of each component constituting the camera 140, complicating the structure.

On the other hand, since the iris photography-dedicated camera 150, which is another camera, is used in such a manner that the user holds the mobile communication terminal 100 in his / her hand and brings the camera 150 close to his or her eyes, The focal distance may be fixed in the range, and the resolution required for iris authentication can be obtained.

That is, the camera 150 may have a viewing angle of 15 to 45 degrees and a focal distance of 10 to 30 cm, for example. This reduces the number of optical components that make up the camera 150 and makes it simple to configure. The resolution of the camera 150 is determined by searching the eye portion of the user from the image (i.e., the front image) photographed within the viewing angle and the focal distance, extracting the iris from the detected eye portion, Iris image) can be at least 200 x 200 pixels, preferably at least 800 x 800 pixels. Therefore, a camera with a relatively low resolution can be used.

Such optical characteristics of the iris photography dedicated camera 150 will be described later with reference to Fig.

When the user attempts to authenticate the iris using the mobile communication terminal 100 having the iris-dedicated camera 150, the user moves the camera 150 to the image display surface 120 ) Can be seen in his eyes. At this time, an arbitrary color or blinking is displayed in a wide part of the image display surface 120. Such an indication may indicate that the user's eyes do not exactly coincide with the photographing optical axis of the iris photography dedicated camera 150 or are not located at the focal distance of the camera 150. [ The user can recognize the displayed color or blinking even if he or she does not look at the image display surface 120 directly. Thus, the user can recognize the color or blinking in the state of looking at the camera 150, It is possible to adjust the position of the mobile communication terminal 100 with respect to the eyes. This makes it possible to perform iris authentication processing more quickly and accurately.

2 is a block diagram schematically illustrating a structure of a mobile communication terminal equipped with an iris photography camera according to the present invention. The mobile communication terminal 100 having the iris photography camera 150 according to the present invention includes the communication function unit 110, the display unit 120, the operation unit 130, the general photographing unit 140, the iris photographing unit 150, and a main control unit 160.

The communication function unit 110 is a functional unit that processes various data communication functions as well as communication for voice communication performed by the mobile communication terminal 100. [ The communication function unit 110 may include all communication functions such as wireless communication through a mobile communication network, wired / wireless communication through a wired / wireless Internet network, NFC, Bluetooth, and infrared communication.

The display unit 120 includes an image display surface 120. The image display surface 120 includes a light control method such as an LCD, an LED, and an OLED, or a visual display means of a color display system.

The operation unit 130 may include one or more contact type buttons, a dial, and a touch button. Or a touch screen disposed to overlap with the image display surface 120.

The general photographing unit 140 includes a camera for photographing the user's face looking at the image display surface 120 or photographing the surrounding objects (i.e., general image) in order to perform a video call And may include an IR filter 153 for generating an image by sensing only the color of visible light.

The iris capturing unit 150 captures an image of a user's eyes positioned in front of the mobile communication terminal 100 in a state where the user holds the mobile communication terminal 100 in close proximity to his or her eyes, Only camera 150 (here, the iris photographing unit and the iris photographing camera share number 150).

The iris image capturing unit 150 can remove the IR filter 153 from the photographing optical axis of the camera 150 so as to display not only the visible light but also the color and intensity of the infrared ray. In a further embodiment, the IR filter 153 may optionally be controlled for insertion and removal with respect to the imaging optical axis. The generated forward image is transmitted to the main control unit 160 and can be used for the iris authentication process in the iris authentication application 164.

On the other hand, the iris capturing unit 150 may include an authentication chip 158 storing arbitrary unique information. The unique information can be encrypted and stored by a specific encryption algorithm. The unique information may be used to encrypt the forward image generated by the iris capturing unit 150 or uniquely identify the iris capturing camera 150. [ Accordingly, it is possible to prevent a forward image generated by a false user from being transmitted to the main control unit 160.

Further, the authentication chip 158 may encrypt the forward image to be photographed using an encryption algorithm, and then transmit (for example, toward the main control unit).

The main control unit 160 can receive user operations from the operation unit 130 and can control the driving of various functions provided by the mobile communication terminal 100. [ As an example, the operation of the communication function unit 110 can be controlled to process a voice call or a data communication by a user's operation or by a communication request inputted.

In addition, the main control unit 160 can perform a general photographing function, which can be processed by the general photographing application 162. [ When the execution of the general photographing function is selected by the user, the main control unit 160 drives the general photographing application 162 and displays the situation displayed on the image display surface 120 in front of the current camera 140 in real time And stores the still image or moving image in a predetermined memory space according to a method selected by the user.

In addition, the main control unit 160 can perform the iris authentication function. The iris authentication function can be processed by the iris authentication application 164. If execution of the iris authentication function is selected by the user's operation, the main control unit 160 drives the iris authentication application 164. The iris authentication application 164 first compares the intrinsic information stored in the authentication chip 158 with the intrinsic information previously stored in the intrinsic information stored in the authentication chip 158, Lt; / RTI > Alternatively, the iris authentication application 164 may decode the information transmitted from the iris capturing unit 150 using the unique information, and then separate the forward image.

Then, the iris authentication application 164 sets a part of the image display surface 120 as an eye display area, and sets a part of the image display area other than the eye display area as a peripheral area. In addition, a forward image generated in real time can be displayed on the image display surface 120. According to this display, the eyes of the user can be seen shifted upward, downward, leftward, and rightward relative to the center of the fixed eye display area, or the eyes of the user can be seen clearly or blurred. The user recognizes such a situation and can adjust the position of the mobile communication terminal 100 in the up, down, left, and / or the right direction with respect to the user's eyes.

The iris authentication application 164 may separate the iris image of the user from the captured image and display the separated iris image in the eye display area. In this case, even if the user's eyes are misaligned from the photographing optical axis of the camera 150 to such an extent that the user's eyes are hardly visible in the eye display area, the iris part is automatically extracted and displayed on the eye display area, 100 can be adjusted. In other words, it will be much easier to adjust the position in a state in which a part of the user's eyes is visible, as compared with the case where the user's eyes are not seen on the image display surface.

In addition, the iris authentication application 164 can determine whether the currently acquired iris image is suitable for use in iris authentication processing. The determination result may be displayed in various ways in a peripheral area (an area other than the eye display area) of the image display surface 120. [

The determination as to whether or not it is appropriate may be made, for example, by a method of extracting an iris image for each forward image (which may be a still image) acquired every predetermined period and performing an actual authentication process using each iris image However, it may be a method of extracting the eye shape of the user on each still image and determining the size and / or the contrast ratio of the extracted eye shape. Of course, another fast processable decision may be used.

The iris authentication application 164 may display the overall color of the surrounding area in a specific color or change the displayed color to a different color or blink the result of the determination. In addition, guidance display may be performed on a part of the peripheral area by letters or numbers.

On the other hand, the iris authentication application 164 performs iris authentication processing using the separated iris image. At this time, the iris authentication process can be performed using all iris images obtained when the iris image can be separated. Alternatively, it may be performed using the iris image of the forward image acquired at a time point when the user's eye exactly coincides with the photographing optical axis of the iris photography dedicated camera 150.

The iris authentication process extracts an iris feature point (or an iris template) from the obtained iris image according to a predetermined analysis algorithm, and outputs the extracted iris feature points and registered iris feature points (or registered iris templates) , And comparing the degree of coincidence or the degree of coincidence with each other. If the two match or coincide with each other, the iris authentication result indicating that the current user is a registered user and indicates the authentication success can be generated. Conversely, when the two do not match or the degree of coincidence is less than the reference value, the iris authentication result can be generated to process the iris authentication failure for the current user.

The main control unit 160 may allow or block the user's access to the specific security function provided by the mobile communication terminal 100 using the iris authentication result.

The security function may include, for example, execution protection of a specific application of the mobile communication terminal 100, and read / write protection for specific data. In addition, the mobile communication terminal 100 may include a user authentication function for a security function provided by the PC 200 connected to the mobile communication terminal 100 in a data communication manner. Or protection against financial transactions or payment transactions through a remote authentication server.

Meanwhile, the forward image captured by the iris capturing unit 150 in real time and received by the iris authentication application 164 may include still images of 10 to 60 frames per second. The iris authentication application 164 can select about one to three best images that can clearly identify the feature points of the iris of the plurality of still images, and generate an iris image on the selected still image.

The iris image capturing unit 150 may include an IR filter (hereinafter referred to as an IR filter) for blocking infrared rays incident on the image pickup element 154 of the camera for iris image capturing. The IR filter 153 can be controlled to block or pass infrared rays by electrical control. This can be realized by driving the IR filter 153 to be inserted into or removed from the optical axis of the lens 152. Alternatively, it may be realized by electrically controlling the arrangement direction of the liquid crystal having the IR blocking function.

In the present invention, the lens 152 of the iris photography-purpose camera 150 may have a front viewing angle of 15 to 45 degrees and a focal distance of 10 to 30 cm. By using a fixed focal length without a wide viewing angle, a subject of relatively constant size, called a user's eye, can be accurately photographed at a high resolution.

On the other hand, the iris capturing unit 150 may further include an illuminating unit for illuminating the user's eyes. The illuminating means may be, for example, an IR LED which irradiates infrared rays forward. The IR illumination is not distinguishable from the human eye and does not cause a change in the size of the iris. Therefore, it is suitable for illumination for photographing the iris. Of course, illumination by visible light may be provided.

Here, it is preferable that the irradiation optical axis of the IR LED is set so as to intersect with the photographing optical axis near the focal distance of the dedicated camera 150 of the iris photographing unit 150. Thereby, it can be optimally illuminated when the user's eyes are at the focal distance of the camera 150. [ The irradiation optical axis may be set such that when the user's eye is photographed, the infrared rays to be irradiated are reflected from the user ' s eyeball and directly incident on the camera 150. [ In order to minimize the reflection of the illumination, the intersection position of the irradiation optical axis and the photographing optical axis may be adjusted out of the focal distance.

3 is a flowchart illustrating an operation of a mobile communication terminal equipped with an iris photography camera according to the present invention.

First, when the user operates the mobile communication terminal 100 (S110), the function of each part is controlled in order to execute the function requested by the user operation input through the operation unit 130 (S112).

If the user requests execution of a general shooting function (S114), the general shooting application 162 is driven (S116). The general photographing application 162 displays the image currently displayed on the image display surface 120 through the camera 140 in real time and stores the still image or the moving image in the memory space by a user operation or a timer function (S118).

On the other hand, if the user selects to perform the security function, i.e., the iris authentication function (S120), the iris authentication application 164 is driven (S122). The iris authentication application 164 drives the iris authentication dedicated camera 150 and displays the forward image acquired by the camera 150 in real time on the image display surface 120 (S124). At this time, the displayed form may be such that only the iris image is displayed in the eye display area A of the image display surface 120, or the front image and the eye display area A are overlapped and displayed. For example, the eye display area A may be a transparent area, and the peripheral area B may be an opaque (or translucent) area. Accordingly, the user can adjust the position of the mobile communication terminal 100 so that the user's eyes can be positioned inside the transparent eye display area A.

Then, the iris authentication application 164 separates the iris image from the forward image, and determines whether the iris image can be used for iris authentication (S126). If the user's eyes are deviated from the photographing optical axis of the camera 150 vertically and horizontally or close to or far from the focal distance, the user is guided in which direction the mobile communication terminal 100 should be moved (S128). Such guidance may be made in the color of the peripheral area B, blinking, guiding character display, etc., as described above.

If the user moves the position of the mobile communication terminal 100 while watching the displayed items in the surrounding area B, the iris authentication application 164 may acquire the iris image while moving, and use the obtained iris image And performs iris authentication processing (S130). As described above, it is preferable that the iris authentication processing is performed promptly without any special notification to the user.

When the iris authentication application 164 performs the iris authentication process, the iris authentication application 164 generates a corresponding iris authentication result and uses it for the security function (S132).

Next, with reference to Fig. 4, the characteristics of the iris photography dedicated camera constituting the iris image pickup section according to the present invention will be described. The iris photography dedicated camera 150 of the iris image pickup section 150 may include a lens 152, an IR filter 153 and an image pickup element 154.

The lens 152 constituting the iris photography camera 150 according to the present invention may be a fixed focal length distance system having a viewing angle of 15 to 45 degrees and a focal distance of 10 to 30 cm. In general, the mobile communication terminal 100 according to the present invention is used in such a manner that the user holds the portable communication terminal 100 by hand and brings it closer to his / her eyes. Therefore, the focal distance is short and narrow and the fixed focal distance system is not inconvenient to use.

Meanwhile, the iris image pickup unit 150 according to the present invention may be provided with an IR filter 153 which can be inserted or removed in the photographing optical axis to control interception and passage of infrared rays to the image sensor 154. The IR filter 153 may be inserted into or removed from the optical axis by being supplied with a driving force by an actuator, a solenoid, a motor rotation or the like. Alternatively, the IR filter 153 may be realized by electrically controlling the arrangement direction of the liquid crystal having the IR blocking function. When such an IR filter 153 is inserted into the photographing optical axis, the image pickup element 154 can photograph an image by visible light from which infrared rays have been removed. At this time, the photographed image will have the same color as that of the naked eye. On the other hand, when the IR filter 153 is deviated from the photographing optical axis, the image pickup element 154 generates an image including infrared rays. In this case, the photographed image will have a color different from that of the user's eyes, but the part that can not be seen from the boundaries of light and darkness or visible light in the living body can be seen in the image.

As the image pickup element 154, a CMOS sensor, a CCD sensor, an RGBIr sensor, or the like can be used. A CMOS sensor is a type of integrated circuit and is an element used to construct a digital circuit such as a microprocessor or SRAM. A CCD sensor is a device that converts a signal input into a light into an electrical signal using a photoelectric effect. Unlike a conventional sensor that only recognizes red, green, and blue colors, the RGBIr sensor is superior in image quality because it can capture infrared light and is a device that can capture three-dimensional images with one lens.

On the other hand, in the present invention, iris authentication application 164 can control insertion or removal of IR filter 153. It is also possible to derive an optimum result in the iris authentication processing from the iris image obtained by the visible light photographed via the IR filter 153 and the iris image including the infrared ray obtained by removing the IR filter 153 The judged image can be selected and used for iris authentication processing. That is, it is possible to select images that are clearly or clearly distinguishable enough to more accurately identify the user.

That is, the degree of similarity between the iris template acquired from the optimal image and the registered iris template obtained from the best image among the iris images obtained by visible light is calculated, The degree of similarity may be calculated and the authentication result may be generated using the higher degree of similarity.

According to this process, iris authentication processing can be completed with an optimal image among the iris images photographed under various conditions according to the amount of visible ray or the amount of infrared ray to be illuminated, The situation can be reduced. On the contrary, it is possible to eliminate an error situation in which another user is mistakenly recognized as a registered user.

5 is a view showing an embodiment of an iris photography dedicated camera according to the present invention.

Yellow shows the circuit board. The circuit board may be, for example, a flexible printed circuit board (FPCB). An imaging element may be disposed on one side of the circuit board and the imaging element may be covered by a holder. The holder can be equipped with a lens, which allows the lens to focus on the surface of the imaging element. An IR filter may be disposed in front of the holder or between the lens and the imaging element. At this time, the IR filter may be removed from the photographing optical axis by a predetermined control or may be driven to be interposed in the photographing optical axis.

On the other side of the circuit board, a constituent part for processing an image photographed by the image pickup element can be arranged. The component for processing the image may be, for example, an authentication chip. Alternatively, an integrated circuit such as a microprocessor performing the functions of a scan control unit may be mounted.

Further, on the other side of the circuit board, a connector for transmitting the signal of the photographed image or the encrypted information to the external component can be constituted. A reinforcing material may be added to increase the mechanical strength of the connector portion. Further, the reinforcing member may be disposed on the opposite side of the position where the image pickup device is disposed.

FIG. 6 is a view for explaining a display form of an iris authentication application driven in the mobile communication terminal according to the present invention. The iris authentication application 164 provides a function of displaying the forward image photographed by the camera 150 on the image display surface 120 of the mobile communication terminal 100 in real time. The iris authentication application 164 that provides such a display function will be driven under the control of the main control unit 160 in the mobile communication terminal 100. [

On the image display surface 120, there is a long oval-shaped eye display area A which is similar to a human eye shape. The portion other than the eye display region A becomes the peripheral region B. [ In the eye display area A, an image can be displayed around the iris of the user among the peripheral images photographed by the photographing part 150. [

Further, a part of the peripheral area B can be set as a character display area C in which a character guiding the user to adjust the position of the camera 150 is displayed.

In the eye display area A, a forward image is displayed around the iris of the user. The surrounding face will be mainly displayed around the user's eyes.

The peripheral area B is provided with a visual guide for allowing the user to move the camera 150 of the mobile communication terminal 100 at a distance at which the size of the eye currently photographed can acquire an iris image suitable for iris authentication Is displayed.

6 (a), if the user holds the camera 150 too far away from the eye so that the eyes are taken too small or both eyes are all being photographed, The region B is displayed in a red color, or the red color is blinked every predetermined cycle.

By controlling the color, contrast, or blinking of the color displayed at this time, it is possible to recognize how far it has fallen. For example, if the red color is blinking slowly or deeply, it may indicate that the user's eyes and the camera 150 are too far away. As the user moves the camera 150 closer to the eye, the color displayed in the peripheral region B may be changed to green with the red color becoming thinner. In addition, the blinking rate gradually increases and can be displayed in a state in which the blinking rate is constantly on.

On the other hand, in the character display area C, "approach close ". It may display character information such as "Approach 5CM "," Move 2CM to the left ".

6 (b) shows a state in which the center of the eye is far away from the photographing optical axis of the lens 152, although the user's eye is taken sufficiently large. In this case, by displaying the left and right sides of the peripheral region B in different colors, the user can indicate in which direction the camera 150 should be moved. For example, in the drawing, the eyes of the user are shifted to the left. At this time, by displaying the left side of the peripheral area B in blue and the right side in red, , The user will move the camera 150 to the direction of blue, that is, to the left, whereby the iris of the user will be shifted to the center of the eye display area A .

In the peripheral area B, the degree to which the eye is photographed dark or bright depending on the illumination state of the user's eyes may be displayed.

Here, the process of acquiring the iris image and the process of moving the eye of the user to the center of the eye display area A may be independent of each other. That is, the iris image is not always obtained at the time when the user's eyes are displayed at the center of the eye display area A. The iris image can be obtained at the optimum moment even while the user adjusts the position of the camera 150 so that his or her eye is accurately located in the eye display area A. That is, the display by the iris authentication application 164 is used only for reference to the user.

The main control unit 160 detects the user's eyes in the forward image captured and received in real time independently of displaying the forward image in the eye display area A and further detects the iris part of the user, The image is generated in real time, and the resolution, size, and contrast ratio of the generated iris image are sensed to check whether it can be used for the iris authentication processing. If the iris authentication processing is satisfied, iris authentication processing can be performed immediately.

According to the mobile communication terminal equipped with the iris photography dedicated camera according to the present invention having such a configuration and operation, the user can recognize the color and the character displayed on the video display surface of the mobile communication terminal 100 by the iris authentication application 164 You can easily adjust your eye position while watching. In addition, since an optimal image is acquired during the adjustment of the eye position by the user and the iris authentication processing is performed, rapid processing is possible.

The embodiments of the present invention described above are merely illustrative of the technical idea of the present invention, and the scope of protection of the present invention should be interpreted according to the claims. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the essential characteristics thereof, It is to be understood that the invention is not limited thereto.

Claims (8)

A communication function unit for providing voice and data communication functions through a mobile communication network;
A display unit having an image display surface for visually displaying an image to a user;
A general photographing unit for photographing a forward direction by a user's operation to generate a general image;
An iris capturing unit independently configured with the general photographing unit and having a forward-facing iris photographing camera and generating a forward image photographed forward at predetermined intervals; And
(1) when the execution of the general photographing function is selected by the user's operation, the general photographing application displaying the general image on the image display surface and storing the general image displayed by the user is executed, and ) When the execution of the iris authentication function is selected by the user's operation, a part of the image display surface is set as the eye display area, a part other than the eye display area is set as the peripheral area, The iris image corresponding to the iris part of the user is separated and displayed in real time in the eye display area, and in the peripheral area, it is displayed in real time whether the iris image currently displayed is usable for the iris authentication processing, Extracts an iris feature point from the corresponding iris image if it is determined that the iris feature point is available for the iris recognition process, Executing an iris authentication application for performing an iris authentication process for comparing the feature points with registered iris feature points of a registered user and generating an iris authentication result according to whether or not the feature points are matched; and (3) And a main controller for processing the communication function. The method according to claim 1,
Wherein the iris photography dedicated camera of the iris imaging section
Wherein the viewing angle is in the range of 15 to 45 degrees and the focal distance is in the range of 10 to 30 cm. The method according to claim 1,
The iris authentication application includes:
Depending on the degree to which the user's eyes are displaced in a predetermined direction from the photographing optical axis of the camera, the degree to which the user's eyes are located close to or far from the focal distance of the camera, or the degree to which the user's eyes are darkly or brightly photographed , The peripheral area is displayed in an arbitrary color, or the displayed color is blinked arbitrarily or an arbitrary character is displayed. The method according to claim 1,
Wherein the iris capturing unit comprises:
An IR LED for irradiating infrared rays toward the front side,
Further comprising an IR filter for selectively blocking or passing infrared rays incident on the imaging element of the camera under the control of the iris authentication application. 5. The method of claim 4,
The iris authentication application includes:
The iris image capturing unit controls the operation of the IR filter to remove the IR filter from the iris image obtained after the IR filter is cut off through the IR filter in front of the image pickup device and the IR filter, Wherein the iris image is used for the iris authentication processing, wherein the iris image is predicted to be capable of generating a better authentication result in the iris authentication processing. The method according to claim 1,
Wherein the iris capturing unit includes an authentication chip storing predetermined unique information,
The iris authentication application compares the intrinsic information stored in the authentication chip with previously stored intrinsic information when the execution of the iris authentication function is selected to receive the forward image from the iris image capturing unit when both are identical And a camera for capturing an iris image. The method according to claim 1,
The communication function unit provides a wired or wireless communication interface with a communication port of the computer,
Wherein the main controller synchronizes the iris authentication application processed by the computer with the security function processed by the computer and performs the iris authentication process upon requesting user authentication from the computer and transmits the iris authentication result generated through the communication interface Wherein the camera is provided with a camera dedicated to iris photography. The method according to claim 1,
The iris photographing camera may further include:
An IR filter for intercepting infrared rays incident thereon, an IR LED for irradiating infrared rays toward the front, and an authentication chip for encrypting the forward image by a built-in encryption algorithm. A mobile communication terminal.
KR1020150041690A 2015-03-25 2015-03-25 Mobile device having camera dedicated for iris identification KR20160116106A (en)

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Publication number Priority date Publication date Assignee Title
WO2018155928A1 (en) * 2017-02-23 2018-08-30 삼성전자주식회사 Electronic device for performing authentication by using multiple biometric sensors and operation method thereof
US11403378B2 (en) 2018-07-23 2022-08-02 Samsung Electronics Co., Ltd. Electronic apparatus and controlling method thereof

Citations (1)

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Publication number Priority date Publication date Assignee Title
KR20140133762A (en) 2013-05-24 2014-11-20 박대진 Identification method and appratus of iris using short range iris photographing camera in smart phone

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
KR20140133762A (en) 2013-05-24 2014-11-20 박대진 Identification method and appratus of iris using short range iris photographing camera in smart phone

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018155928A1 (en) * 2017-02-23 2018-08-30 삼성전자주식회사 Electronic device for performing authentication by using multiple biometric sensors and operation method thereof
US11397598B2 (en) 2017-02-23 2022-07-26 Samsung Electronics Co., Ltd. Electronic device for performing authentication by using multiple biometric sensors and operation method thereof
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