KR20140133762A - Identification method and appratus of iris using short range iris photographing camera in smart phone - Google Patents

Abstract

The present invention relates to an iris recognition method using a short-range iris photographing camera in a smart phone. It is possible to improve the recognition rate by processing an iris image taken through the short-range iris photographing camera in a smart phone as binary data to reduce the amount of data, and reduce the wrong recognition rate through changes in a pattern and a path of an iris. In addition, it is possible to process through a low capacity system, thereby increasing miniaturization and portability and increasing the recognition rate regardless of the density of the pattern depending on night and day or illumination.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iris recognition method using an iris recognition camera,

The present invention relates to a method for recognizing an iris using a camera for a short distance iris of a smartphone, and more particularly, to a method for recognizing an iris by using a camera for a short distance iris, And a method for recognizing an iris using a camera for a short distance iris of a smart phone, which can reduce a false recognition rate through a change in an iris pattern and a path.

The iris recognition system distinguishes iris patterns unique to each person and proves their identity. It is more accurate than other biometrics methods such as voice and fingerprints, and has high security. The iris is a region existing between the pupil and the white of the eye. The iris recognition is a technique of recognizing an individual's identity based on the analysis of different iris patterns for each individual.

Generally, a key technology in the technical field for identifying and applying an individual's identity by utilizing biometric feature information is to efficiently acquire unique feature information from an input image. As a feature extraction method for an iris image, Conversion and wavelet transform are mainly used. Wavelet transform is a technique for interpreting signals in multi-resolution. It is faster than existing signal processing algorithms based on Fourier transform and efficiently localizes signals in time and frequency domain. , And it is widely applied in recent signal and image processing fields.

Related prior arts are disclosed in Korean Patent Publication No. 10-2004-0062248 (July 7, 2004.), "iris recognition method using wavelet transform independent of position movement" and Korean Patent No. 10-1046770 (issued on July 6, 2011) There is a "near-iris recognition camera".

However, such an iris camera has not been developed in a smartphone, and there is a structural problem in making it compact.

In the wavelet transform used in iris recognition or image processing, there arises a problem that the feature value varies depending on the positional shift of the input image, thereby causing a problem that the security reliability of the iris recognition system is deteriorated.

In addition, when registering iris images, only the iris images matching the set ratio are registered after setting the radius ratio of the pupil and iris. Therefore, there is a problem that the recognition time takes long if the ratio does not match the set ratio according to illumination at the time of authentication.

The present invention has been made in order to overcome the above problems, and it is an object of the present invention to improve the recognition speed by reducing the data amount by processing the iris image photographed by the near- And a method for recognizing an iris using a camera for a short distance iris of a smart phone capable of reducing a false recognition rate through a change in a path.

The popular smartphone is expensive and is an intensive secret device that contains all the private secret data stored inside it. When it is lost, the personal information is leaked or the fee is charged to the registered owner by using the internet And social problems. Therefore, the purpose is to make it impossible to log on if it is not registered iris even when it is lost.

According to another aspect of the present invention, there is provided a method for controlling an iris, comprising the steps of: operating an iris photographing camera when iris recognition is selected in a key input unit; Determining whether there is a change in size of a pupil in the captured iris image; Acquiring one iris image when there is a change in the size of the pupil; Generating iris data by normalizing each pixel to binary data with respect to the one iris image; Comparing the iris data with iris data stored in a storage unit; And outputting the comparison result through an output unit.

Further, according to the present invention, the control unit may operate the iris photographing camera to photograph the iris according to the brightness of the illumination when the iris registration is selected in the key input unit. Determining whether there is a change in size of a pupil in the captured iris image; Acquiring a plurality of iris images when the size of the pupil changes; Generating iris data by normalizing each pixel independently of the plurality of iris images into binary data; And storing the iris data for the plurality of iris images in the storage unit.

The present invention is characterized in that the operation state of the iris photographing camera is displayed through a display lamp in the step of photographing the iris.

The object plane of the lens is a position at which the iris is located. The object plane of the iris is located at a predetermined distance L from the end of the lens, And the center line of the illumination light source is an image sensor surface, and the center line of the illumination light source is an area of the lens center line and the arc of the lens center line, And has an illumination inclination angle equal to the tangent (D / L).

The present invention is further characterized in that the iris photographing camera further comprises a prism arranged to arrange the illumination light source in parallel or parallel to the lens center line, to be spaced apart from the lens center line, and to illuminate the object plane obliquely .

In addition, the smartphone bodies 500 and 600 of the present invention are formed of conventional touch screens 510 and 610, and general signal display parts 520 and 620 are formed on one side, The iris recognizer 530 and the iris recognizer 530 are formed so that the user's eyes are close to the iris periods 530 and 630 when a user uses a signal or logs in to send a signal. The present invention relates to an iris recognition apparatus using a camera for a short distance iris of a smart phone.

The present invention can reduce the amount of data by reducing the amount of data by processing the iris image taken by the near-IR iris camera of the smart phone into binary data, and reduce the recognition rate by changing the pattern and path of the iris.

In addition, since the iris image is processed as binary data, it can be processed through a system with a low specification, and miniaturization and portability can be increased.

In addition, by processing the iris image as binary data, the recognition rate can be increased regardless of whether the pattern according to day and night or illumination changes.

Moreover, by providing a method that can be improved to a small size, even if the user loses his / her smartphone, the user can not use the registered iris unless others can use it. It is effective.

1 is a block diagram illustrating an iris recognition apparatus using a camera for a short distance iris of a smartphone according to an embodiment of the present invention.
FIG. 2 is a block diagram specifically illustrating a camera for a short distance iris of a smartphone in an iris recognition device using a camera for a short distance iris photograph of a smartphone according to an embodiment of the present invention.
3 is a flowchart illustrating an iris recognition method using a camera for a short distance iris of a smartphone according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating changes in pupil according to brightness of illumination in an iris recognition method using a camera for a near-IR iris of a smartphone according to an embodiment of the present invention.
5 is a view for explaining a method of normalizing binary data in an iris recognition method using a camera for a short distance iris of a smartphone according to an embodiment of the present invention.
6 is an external view of a smartphone to which an iris recognition method using a camera for a short distance iris image of a smartphone is applied according to an embodiment of the present invention.
FIG. 7 is an outline structure of a smart phone to which an iris recognition method using a camera for a short distance iris image of a smartphone according to an embodiment of the present invention is applied. The shape of an eye is an external structure shown in a smart phone.

Hereinafter, an embodiment of a method for recognizing an iris using a camera for short range iris photography of a smartphone according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a block diagram illustrating an iris recognition apparatus using a camera for a short distance iris of a smartphone according to an exemplary embodiment of the present invention. FIG. 2 is a block diagram illustrating an iris recognition apparatus using a camera for a short distance iris photograph of a smartphone according to an exemplary embodiment of the present invention. FIG. 2 is a block diagram specifically showing a camera for a short distance iris of a smartphone in an iris recognition device.

As shown in FIG. 1, the iris recognition apparatus using a camera for short range iris photography of a smartphone according to an embodiment of the present invention includes an iris photographing camera 1, a key input unit 2, a storage unit 4, a control unit 3 An output unit 5 and a display lamp 300. [

2, the iris photographing camera 1 is provided with a prism 200 having an inclined surface on an upper portion of a guide of the illumination IR LED 20 and having a concavo-convex portion to improve the brightness uniformity around the iris, thereby improving iris recognition It is possible to prevent the static electricity from being transmitted to the internal device through the illumination IR LED 20, so that it can be formed small.

2, the iris photographing camera 1 includes a sensor (not shown) and an accessory circuit (not shown), a lens 10, a display lamp 300, a white light and a light IR LED The illumination light source 20 is constructed.

The indicator lamp 300 serves to guide the iris of the user to be accurately placed on the object surface of the lens. The controller 3 informs the user that the iris recognition is in progress, And both the display lamp 300 and the sound device can be used together.

The illumination light source 20 is spaced from the lens center line L / O of the lens 10 by a predetermined distance D.

The object plane of the lens 10 is a position at which the iris is placed and is a distance L away from the end of the lens 10 and substantially a region around the lens center line L / Is an image sensor surface. The illumination center line I / C has an illumination inclination angle equal to the lens center line L / C of the lens and the arc tangent (D / L) so as to face the object surface of the lens 10.

Here, the illumination light source 20 is arranged in parallel or parallel to the lens center line L / C of the lens 10, and is spaced apart from the lens center line L / C of the lens 1, The prism 200 is installed so as to cover the guide 30 with an illumination light source (IR LED) 20 for illumination.

The incident surface 210 of the prism 200 is formed as an inclined surface so as to illuminate the object surface with respect to the vertical arrangement of the illumination IR LED 20 to improve the brightness uniformity around the iris even with a small amount of light. In addition, the illumination light source 20 illuminates the white light formed on one side of the illumination IR LED to illuminate the light to adjust the size of the pupil, thereby enabling the iris recognition to be performed anytime and anywhere. .

The exit surface 220 of the prism 200 is formed in a flat surface because it is apparently preferable that the exit surface 220 is formed on the same plane as the upper surface of the case 100 of the camera module.

The key input unit 2 selects whether to register the iris or recognize the iris through the iris recognition apparatus.

The storage unit 4 stores a program for registration and recognition of the iris and iris data for the recognized iris image at the time of registration.

The output unit 5 outputs the result of iris recognition by the control unit 3, and provides various services according to the iris recognition result in a peripheral device (not shown).

The control unit 3 operates the iris photography camera 1 according to the selection of the key input unit 2, photographs the iris according to the brightness of illumination, determines whether the iris is a living person's iris through a change in pupil size, The iris data for the iris image is stored and registered or the iris data and the iris recognition for the iris image stored in the storage unit 4 are performed.

The display lamp 300 is turned on so that the user can recognize that the iris image is being recognized by operating the iris photographing camera 1 in the control unit 3. [ At this time, the display lamp 300 may display the progress of the display through various colors.

FIG. 3 is a flowchart illustrating an iris recognition method using a camera for a short distance iris photograph of a smartphone according to an exemplary embodiment of the present invention. FIG. FIG. 5 is a diagram illustrating a change of a pupil according to the brightness of illumination in the iris recognition method. FIG. 5 illustrates a method of normalizing the iris recognition method using binarized data in the iris recognition method using a camera for a short distance iris photograph of a smartphone according to an embodiment of the present invention Fig.

3, in the iris recognition method using the camera for the near iris photography of the smartphone according to the embodiment of the present invention, when the iris recognition is selected in the key input unit 2 (S10) The iris 1 is operated to photograph the iris according to the brightness of the illumination (S22).

At this time, the operation state of the camera 1 for iris photography is displayed through the display lamp 300 to recognize that the user is operating.

Even if the human iris is the same person, the size of the pupil changes according to the brightness of illumination as shown in Fig. 4, and the iris pattern also changes.

In the present invention, an iris image is acquired while maintaining a characteristic that varies depending on an individual characteristic by photographing an iris while varying brightness of illumination.

After the iris is imaged according to the brightness of the illumination, it is determined whether there is a change in the pupil size (S24).

At this time, if there is no change in pupil size, it can not be judged to be a living person.

When an eye of a living person is photographed, as the size of the pupil changes, one iris image is acquired for iris recognition among the iris images thus changed (S26).

As shown in FIG. 5, the acquired iris image is normalized into binary data for each pixel of the imaged iris image to generate iris data (S28).

That is, the iris data can be reduced in the amount of data by normalizing it with binary data indicating that there is no pattern irrespective of the increase of the iris pattern.

Therefore, the processing speed can be improved and the recognition speed can be improved. Also, the processing speed can be improved through the low-specification system, and the miniaturization and portability can be increased, and the influence of night and day and illumination can be minimized.

The generated iris data is compared with iris data for a plurality of iris images photographed in accordance with the brightness of illumination stored in the storage unit 4 (S30).

Then, the comparison result is outputted through the output unit 5 so that various services can be provided through a peripheral device (not shown) through the iris recognition result (S32).

On the other hand, when the iris registration is selected in the key input unit 2 (S10), the control unit 3 operates the iris photography camera 1 to photograph the iris according to the brightness of the illumination (S12).

At this time, the operation state of the camera 1 for iris photography is displayed through the display lamp 300 to recognize that the user is operating.

Even if the human iris is the same person, the size of the pupil changes according to the brightness of illumination as shown in Fig. 4, and the iris pattern also changes.

In the present invention, an iris image is acquired while maintaining a characteristic that varies depending on an individual characteristic by photographing an iris while varying brightness of illumination.

After the iris is imaged according to the brightness of the illumination, it is determined whether the size of the pupil is changed (S14).

At this time, if there is no change in pupil size, it can not be judged to be a living person.

When the eye of a living person is photographed, as the size of the pupil changes, a plurality of iris images are acquired for iris registration in the thus changing iris image (S16).

As shown in FIG. 5, iris data for a plurality of acquired iris images is normalized with binary data for each pixel of the imaged iris image to generate iris data for a plurality of iris images (S18).

That is, the iris data can be reduced in the amount of data by normalizing it with binary data indicating that there is no pattern irrespective of the increase of the iris pattern.

Registration is performed by storing the iris data for the plurality of iris images thus generated in the storage unit 4 (S20).

As described above, according to the iris recognition method using the camera for the near iris photography of the smartphone according to the present invention, the iris image taken through the camera for the near iris photography of the smartphone is processed as binary data, In addition, the recognition rate can be reduced by changing the pattern and path of the iris, and it can be processed through a low-specification system, thereby enabling miniaturization and portability to be increased. Regardless of the pattern of day and night or illumination The recognition rate can be increased.

FIG. 6 is an outline structure of a smartphone to which an iris recognition method using a camera for a short distance iris image of a smartphone according to an embodiment of the present invention is applied. FIG. 7 is a cross- The outline structure of a smart phone to which an iris recognition method using a camera is applied is an outline structure shown in a smart phone.

As shown in the figure, the smartphone bodies 500 and 600 are formed of conventional touch screens 510 and 610, and general signal display parts 520 and 620 are formed on one side, And iris recognition devices 530 and 630 are formed on the upper part.

Accordingly, when the user uses a signal to make a call or logs in to make a call, the user turns his / her eyes on the screen in a normal manner so that his or her eyes are close to the iris period 530 and 630, So that it can be used by the user.

In another method, when a user uses a signal to make a call or logs in to make a call, the user's eyes are close to the iris period 530 (630) without turning on the screen, So that it can be used by the user.

FIG. 6 shows a key technology of the smartphone on the upper surface. FIG. 7 shows a display in which an iris recognizer is attached to a smart phone in the form of an eye on the outer periphery thereof. You can do it.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

1: camera for iris photography 2: key input unit
3: control unit 4: storage unit
5: Output section 10: Lens
20: Lighting IR LED 30: Guide
100: case 200: prism
210: incidence surface 220: emergence surface
230: uneven 300: indication lamp
310: Induction mirror

Claims (6)

When the control unit selects iris recognition in the key input unit, activating the iris photographing camera to photograph the iris according to the brightness of the illumination;
Determining whether there is a change in size of a pupil in the captured iris image;
Acquiring one iris image when there is a change in the size of the pupil;
Generating iris data by normalizing each pixel to binary data with respect to the one iris image;
Comparing the iris data with iris data stored in a storage unit; And
And outputting the comparison result through an output unit. The iris recognition method using the camera for a short distance iris of a smartphone. 2. The apparatus of claim 1, wherein when the iris registration is selected in the key input unit
Photographing the iris according to the brightness of the illumination by operating the iris photographing camera;
Determining whether there is a change in size of a pupil in the captured iris image;
Acquiring a plurality of iris images when the size of the pupil changes;
Generating iris data by normalizing each pixel independently of the plurality of iris images into binary data;
And storing the iris data for the plurality of iris images in the storage unit. ≪ RTI ID = 0.0 > 11. < / RTI > 3. The iris recognition method according to claim 1 or 2, wherein the operation state of the iris photographing camera is displayed through a display lamp in the step of photographing the iris. The apparatus according to claim 1, wherein the iris photographing camera
The illumination light source is spaced a certain distance from the lens center line of the lens and the object plane of the lens is a position at which the iris lies and is a distance L away from the end of the lens, Wherein an image forming surface of the lens is an image sensor surface and a center line of the illuminating light source is an illuminating inclination angle of an arc tangent (D / L) with respect to the lens center line so as to face the object surface of the lens, And the iris recognition method using a camera for a short distance iris photograph of a smartphone. The iris photography camera according to claim 4, wherein the iris photography camera further comprises a prism arranged to arrange the illumination light source in parallel or parallel to the lens center line, to be spaced apart from the lens center line, and to illuminate the object plane obliquely A method of iris recognition using a near-field iris camera for a smartphone. The smartphone bodies 500 and 600 are formed of conventional touch screens 510 and 610. Common signal display units 520 and 620 are formed on one side of the smart phone body 600 and iris recognition unit 530 is provided on the other side, (630) is formed, and when the user logs in, his / her eyes are approximated to the iris-occlusion times (530) and (630) so that the smartphone is logged in. Iris recognition device using a camera for near iris photography.

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