WO2018228125A1

WO2018228125A1 - Living iris detection method, electronic apparatus and computer readable storage medium

Info

Publication number: WO2018228125A1
Application number: PCT/CN2018/087382
Authority: WO
Inventors: 周意保
Original assignee: Oppo广东移动通信有限公司
Priority date: 2017-06-14
Filing date: 2018-05-17
Publication date: 2018-12-20
Also published as: CN107368783B; CN107368783A

Abstract

Disclosed is a living iris detection method, which is used for an electronic apparatus (100). The electronic apparatus (100) comprises an iris recognition module (20) for performing iris recognition on an iris of an object to be recognized. The living iris detection method comprises: respectively collecting, by means of the iris recognition module (20), a first iris image and a second iris image when an eye looks straight and aside at the iris recognition module (20); and determining, according to information difference between the first iris image and the second iris image, whether the iris images collected by the iris recognition module (20) are living iris images. Further disclosed are the electronic apparatus (100) and a computer readable storage medium.

Description

Living iris detection method, electronic device and computer readable storage medium

Priority information

The present application claims priority to and the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit.

Technical field

The present invention relates to the field of biometric identification technologies, and in particular, to a living body iris detecting method, an electronic device, and a computer readable storage medium.

Background technique

As an important means of identification, iris recognition has the characteristics of uniqueness, stability and high security. However, in actual use, the iris can also be forged, so the safety of iris recognition is also challenged.

Summary of the invention

Embodiments of the present invention provide a living body iris detecting method, an electronic device, and a computer readable storage medium.

The living body iris detecting method of the embodiment of the present invention is used for an electronic device. The electronic device includes an iris recognition module that performs iris recognition on an iris of an object to be identified, and the living body iris detection method includes the following steps:

And acquiring, by the iris recognition module, a first iris image and a second iris image when the eye is front view and side view of the iris recognition module; and

Determining, according to the information difference between the first iris image and the second iris image, whether the iris image collected by the iris recognition module is a living iris image.

The electronic device of the embodiment of the invention includes an iris recognition module and a processor. The iris recognition module is configured to separately collect a first iris image and a second iris image when the eye is front view and side view of the iris recognition module; the processor is configured to use the first iris image and the second iris image according to the first iris image and the second iris image The difference between the information determines whether the iris image collected by the iris recognition module is a living iris image.

An electronic device in accordance with an embodiment of the present invention includes an iris recognition module, one or more processors, a memory, and one or more programs. Wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, the program comprising instructions to perform the live iris detection method described above.

A computer readable storage medium in accordance with an embodiment of the present invention includes a computer program for use in conjunction with an electronic device capable of imaging, the computer program being executable by a processor to perform the live iris detection method described above.

The living body iris detecting method, the electronic device and the computer readable storage medium of the embodiment of the present invention obtain the change difference of the iris information by processing the two-frame iris image when the user faces the iris recognition module and the side-view iris recognition module, according to the iris information. The difference of the change is judged whether the iris image is collected from the living iris, and the forged iris is prevented from being recognized by the iris, thereby improving the safety of the iris recognition.

The additional aspects and advantages of the embodiments of the present invention will be set forth in part in the description which follows.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a schematic flow chart of a method for detecting a living body iris according to some embodiments of the present invention.

2 is a block diagram of an electronic device in accordance with some embodiments of the present invention.

3 is a block diagram of an electronic device in accordance with some embodiments of the present invention.

4 is a schematic view showing the state of a living body iris detecting method according to some embodiments of the present invention.

FIG. 5 is a schematic flow chart of a method for detecting a living body iris according to some embodiments of the present invention.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

Referring to FIGS. 1 to 2 together, the living body iris detecting method of the embodiment of the present invention is applied to the electronic device 100. The electronic device 100 includes an iris recognition module 20 that performs iris recognition on the iris of the object to be identified. The living iris detection method includes the following steps:

S12: acquiring, by the iris recognition module 20, the first iris image and the second iris image when the eye front view and the side view iris recognition module are respectively collected; and

S13. Determine whether the iris image collected by the iris recognition module 20 is a living iris image according to the information difference between the first iris image and the second iris image.

Referring to FIG. 2 again, the living body iris detecting method of the embodiment of the present invention can be implemented by the electronic device 100 of the embodiment of the present invention. The electronic device 100 of the embodiment of the present invention includes an iris recognition module 20 and a processor 10. Step S12 can be implemented by the iris recognition module 20, and step S13 can be implemented by the processor 10.

That is, the iris recognition module 20 can be used to separately collect the first iris image and the second iris image when the eye is facing and the side view iris recognition module; the processor 10 can be configured to use the first iris image and the second iris image. The difference in information determines whether the iris image acquired by the iris recognition module 20 is a living iris image.

In some embodiments, the electronic device 100 includes a mobile phone, a tablet computer, a notebook computer, smart glasses, a smart helmet, a smart watch, a smart bracelet, and the like. In a specific embodiment of the invention, the electronic device 100 is a mobile phone.

Referring to FIG. 3, in some embodiments, the electronic device 100 includes an iris recognition module 20, one or more processors 10, a memory 30, and one or more programs 31. Among them, one or more programs 31 are stored in the memory 30 and configured to be executed by one or more processors 10. Program 31 includes instructions for performing the following steps:

S13: Determine whether the iris image collected by the iris recognition module 20 is a living iris image according to the information difference between the first iris image and the second iris image.

It can be understood that the iris recognition technology performs identity authentication by collecting iris images and performing feature extraction and matching on the iris images. However, the iris may be forged, for example, the iris recognition module 20 is used to take pictures, fake eyes, etc. to obtain an iris image, etc., so it is necessary to detect whether the iris is a living body during the iris collection process. The living body iris detecting method according to the embodiment of the present invention obtains the information difference of the iris by processing the iris image of the two frames when the object to be recognized is front view iris recognition module 20 and the side view iris recognition module 20, and judges whether it is from the living body according to the information difference of the iris. The iris image collected by the iris prevents the forged iris from being recognized by the iris and enhances the safety of the iris recognition.

Wherein, when the object to be identified is facing the iris recognition module 20 to perform the first image capturing, the front view refers to the position where the iris recognition module 20 is located when the two eyes of the object to be recognized are facing forward. When the object to be recognized is viewed from the iris recognition module 20 for the second image, the object to be recognized may rotate the face to the left to move the iris to the right to the side iris recognition module 20, and the object to be recognized may also rotate to the right. The face moves the iris to the left to view the iris recognition module 20.

In some embodiments, the information of the first iris image includes a first iris area, the information of the second iris image includes a second iris area, and the information difference includes an area difference.

Referring to FIG. 4 , it can be understood that when the object to be recognized rotates the face to view the iris recognition module 20 , the iris is captured by the iris recognition module 20 due to the occlusion of the eyelid, the corner of the eye, and the like. The area will be reduced. In the case where the user rotates the face to the right to view the iris recognition module 20 to the left, in the iris image collected by the iris recognition module 20, the area of the left iris and the area of the right iris are compared with the object to be identified. When the iris recognition module 20 is faced, the area of the left iris and the area of the right iris are reduced, and the area of the right iris is reduced by more. In the case where the user rotates the face to the left to view the iris recognition module 20 to the right, in the iris image collected by the iris recognition module 20, the area of the left iris and the area of the right iris are compared with the object to be identified. When the iris recognition module 20 is faced, the area of the left iris and the area of the right iris are reduced, and the area of the left iris is reduced by more. In this way, two images of the iris of the object to be recognized and the side view iris recognition module 20 can be captured, and the area difference of the iris area in the two frames of images can be calculated to determine whether the iris image collected by the iris recognition module 20 is a living iris image. .

The process of acquiring the iris area is described in detail by taking the first iris image as an example. The processor 10 performs iris positioning on the first iris image. Specifically, the positioning of the iris can be achieved by extracting the inner and outer boundaries of the iris. The inner boundary is extracted by calculating the gray histogram of the first iris image. Since the gray histogram has two main peaks, the first peak corresponds to the range of the gray level of the pupil region, and the second peak Corresponding to the range of gray level concentration in the iris region, therefore, a binarization threshold is selected on the right side of the first peak and the iris image is binarized to separate the pupil to extract the inner circle boundary. The extraction of the outer circle boundary can be performed by the Hough transform method. First, the first iris image is edge-extracted using the Canny operator, and then the edge coefficient of the iris is determined by a Hough transform that can detect the object having the shape to be determined to extract the outer circle boundary. After determining the inner and outer circle boundaries, the position of the annular iris can be determined. After determining the position of the annular iris, the iris area can be determined according to the pixel occupied by the iris portion.

Referring to FIG. 5, in some embodiments, the first iris area includes a first left iris area and a second left iris area. The second iris information includes a first right iris area and a second right iris area, and the area difference includes a left side area difference and a right side area difference. S13 determining, according to the information difference between the first iris image and the second iris image, whether the iris image collected by the iris recognition module 20 is a living iris image comprises the following steps:

S131: Compare whether a left area difference between the first left iris area and the second left iris area is greater than a first preset threshold;

S132: comparing whether a difference in the right side area of the first right iris area and the second right iris area is greater than a second preset threshold; and

S133: Determine that the iris image collected by the iris recognition module 20 is a living iris image when the left area difference is greater than the first preset threshold and the right area difference is greater than the second predetermined threshold.

Referring again to FIG. 2, in some embodiments, step S131, step S132, and step S133 can be implemented by processor 10.

That is to say, the processor 10 can be further used to:

Referring again to FIG. 3, in some embodiments, the program 31 further includes instructions for performing the following steps:

Wherein, when the object to be recognized rotates the face to the right to view the iris recognition module 20 to the left side, the iris on the left side receives less occlusion, and the iris on the right side receives more occlusion, and the first left iris at this time The amount of information reduction is small, and the amount of reduction of the first right iris information is large. That is to say, the difference between the area of the first left iris area and the left side of the second left iris area is smaller, and the difference between the first right iris area and the second right iris area is larger. Therefore, the first preset threshold should be set to be smaller than the second preset threshold at this time. When the object to be recognized rotates the face to the left to view the iris recognition module 20 to the right, the iris on the right side is less blocked, and the iris on the left side is more blocked. At this time, the iris information of the first right side is The amount of reduction is small, and the amount of reduction of the first left iris information is large. That is to say, the difference between the area of the right side of the first right iris area and the area of the right side of the second right iris area is small, and the difference between the area of the first left iris area and the left side of the second left iris area is larger. Therefore, the first preset threshold should be set to be greater than the second preset threshold at this time. When the left area difference is greater than the first preset threshold and the right area difference is greater than the second preset threshold, the iris image collected by the iris recognition module 20 is regarded as a living iris image.

In some embodiments, in the process of performing S12 to collect the first iris image and the second iris image when the iris recognition module 20 separately collects the eye front view and the side view iris recognition module, the living body iris detection of the embodiment of the present invention is performed. The method also includes:

The object to be identified is prompted to rotate the face such that the eye of the object to be identified looks at the iris recognition module 20.

Referring to FIG. 2 again, in some embodiments, the electronic device 100 further includes an output unit 30. The output unit 30 can be configured to prompt the object to be recognized to rotate the face such that the eye of the object to be recognized looks at the iris recognition module 20.

Specifically, the output unit 30 may be a display screen and/or a speaker of the electronic device 100. The electronic device 100 can play a voice through a speaker, and the display screen displays text, animation, or video. The speaker plays the voice while the display screen displays the text, and the like, prompts the object to be recognized to rotate the face to the left or right. For example, the speaker sends a “Please rotate the face to the left” voice signal to prompt the object to be recognized to rotate the face, or the electronic device 100 displays the text content “Please rotate the face to the left” on the display screen to prompt the object to be recognized to rotate the face. Or, the electronic device 100 displays "Please rotate the face to the left" on the display screen, and the speaker emits a voice signal of "Please rotate the face to the left" to prompt the object to be recognized to rotate the face and the like.

As such, the output unit 30 prompts the user to perform face rotation to help the user understand the progress of the iris recognition, speed up the iris recognition, and improve the user experience.

In some embodiments, the rotation angle of the object to be recognized when rotating the face ranges from 5° to 10°. That is to say, the rotation angle of the object to be recognized when rotating the face may be 5°, 6.5°, 8°, 8.9°, 10°, and the like.

It can be understood that the living body iris detecting method of the embodiment of the present invention determines whether the corresponding iris is a living iris by the reduction amount of each area of the two irises (ie, the information difference value), if the face of the object to be recognized is If the rotation angle is too small, such as less than 5°, the reduction of the area of the two irises may be too small to be detected, which may lead to misjudgment in the detection of the living iris. If the rotation angle of the face of the object to be identified is too large, such as greater than 10°, the other iris may not be captured due to the excessive rotation angle, thereby affecting the judgment of the living body iris detection. Therefore, the rotation angle of the object to be recognized when rotating the face should be between [5°, 10°], which can ensure that the reduction of the two iris information can be detected, and the iris image of the two irises can be captured. , thereby improving the success rate of the living body detection of the iris.

A computer readable storage medium in accordance with an embodiment of the present invention includes a computer program for use in conjunction with an electronic device 100 capable of imaging. The computer program can be executed by the processor 10 to perform the living body iris detection method described in any of the above embodiments.

For example, a computer program can be executed by processor 10 to perform the following steps of the living body iris detection method:

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples", etc. Particular features, structures, materials or features described in the embodiments or examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

Any process or method description in the flowcharts or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for performing the steps of a particular logical function or process. And the scope of the preferred embodiments of the invention includes additional implementations, which may be performed in a substantially simultaneous manner or in the reverse order, depending on the functions involved, in the order shown or discussed, which should It will be understood by those skilled in the art to which the embodiments of the present invention pertain.

The logic and/or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for performing logical functions, and may be embodied in any computer readable medium, Used in conjunction with, or in conjunction with, an instruction execution system, apparatus, or device (eg, a computer-based system, a system including a processor, or other system that can fetch instructions and execute instructions from an instruction execution system, apparatus, or device) Or use with equipment. For the purposes of this specification, a "computer-readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport a program for use in an instruction execution system, apparatus, or device, or in conjunction with the instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer readable media include the following: electrical connections (electronic devices) having one or more wires, portable computer disk cartridges (magnetic devices), random access memory (RAM), Read only memory (ROM), erasable editable read only memory (EPROM or flash memory), fiber optic devices, and portable compact disk read only memory (CDROM). In addition, the computer readable medium may even be a paper or other suitable medium on which the program can be printed, as it may be optically scanned, for example by paper or other medium, followed by editing, interpretation or, if appropriate, other suitable The method is processed to obtain the program electronically and then stored in computer memory.

It should be understood that portions of the invention may be implemented in hardware, software, firmware or a combination thereof. In the above-described embodiments, multiple steps or methods may be performed by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if executed in hardware, as in another embodiment, it can be performed by any one of the following techniques or combinations thereof known in the art: having logic gates for performing logic functions on data signals Discrete logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

Those skilled in the art can understand that all or part of the steps carried in carrying out the above implementation method can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, and the program is executed. Including one or a combination of the steps of the method embodiments.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above integrated modules can be executed in the form of hardware or in the form of software functional modules. The integrated modules, if executed in the form of software functional modules and sold or used as separate products, may also be stored in a computer readable storage medium.

The above mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like. Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A living body iris detecting method for an electronic device, characterized in that the electronic device comprises an iris recognition module for iris recognition of an iris to be identified, and the living body iris detecting method comprises the following steps:

And acquiring, by the iris recognition module, a first iris image and a second iris image when the eye is front view and side view of the iris recognition module; and

Determining, according to the information difference between the first iris image and the second iris image, whether the iris image collected by the iris recognition module is a living iris image.
The living body iris detecting method according to claim 1, wherein the first iris image and the second iris are respectively performed when the iris recognition module is configured to collect the eye front view and the side view the iris recognition module. In the process of the step of the image, the living body iris detecting method further includes:

The object to be identified is prompted to rotate the face such that the eye of the object to be identified looks at the iris recognition module.
The method of detecting a living body iris according to claim 2, wherein the rotation angle of the object to be recognized when rotating the face ranges from 5° to 10°.
The living body iris detecting method according to claim 1, wherein the information of the first iris image comprises a first iris area, the information of the second iris image comprises a second iris area, and the information difference comprises an area Difference.
The living body iris detecting method according to claim 4, wherein the first iris area comprises a first left iris area and a second left iris area, and the second iris information comprises a first right iris area And a second right iris area, the area difference value including a left side area difference value and a right side area difference value; the determining the iris recognition according to information difference between the first iris image and the second iris image The step of whether the iris image acquired by the module is a living iris image includes the following steps:

Comparing whether the left side area difference between the first left iris area and the second left iris area is greater than a first preset threshold;

Comparing whether the right side area difference between the first right iris area and the second right iris area is greater than a second predetermined threshold; and

And determining, when the left area difference is greater than the first preset threshold, and the right area difference is greater than the second preset threshold, determining that the iris image collected by the iris recognition module is a living iris image.
An electronic device, the electronic device comprising:

An iris recognition module, configured to separately collect a first iris image and a second iris image when the eye is front view and side view of the iris recognition module; and

a processor, configured to determine, according to information difference between the first iris image and the second iris image, whether the iris image collected by the iris recognition module is a living iris image.
The electronic device according to claim 6, wherein the electronic device further comprises an output unit, the output unit is configured to prompt the object to be recognized to rotate the face to make the eye of the object to be recognized look sideways The iris recognition module.
The electronic device according to claim 7, wherein the rotation angle of the object to be recognized when the face is rotated ranges from 5° to 10°.
The electronic device according to claim 6, wherein the information of the first iris image comprises a first iris area, the information of the second iris image comprises a second iris area, and the information difference comprises an area difference .
The electronic device according to claim 9, wherein the first iris area comprises a first left iris area and a second left iris area, and the second iris information comprises a first right iris area and a first The right iris area, the area difference includes a left side area difference and a right side area difference; the processor is further configured to:

Comparing whether the left side area difference between the first left iris area and the second left iris area is greater than a first preset threshold;

Comparing whether the right side area difference between the first right iris area and the second right iris area is greater than a second predetermined threshold; and

And determining, when the left area difference is greater than the first preset threshold, and the right area difference is greater than the second preset threshold, determining that the iris image collected by the iris recognition module is a living iris image.
An electronic device, the electronic device comprising:

An iris recognition module, wherein the iris recognition module is configured to perform iris recognition on an iris to be recognized;

One or more processors;

Memory; and

One or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the program comprising instructions for:

And acquiring, by the iris recognition module, a first iris image and a second iris image when the eye is front view and side view of the iris recognition module; and

Determining, according to the information difference between the first iris image and the second iris image, whether the iris image collected by the iris recognition module is a living iris image.
The electronic device of claim 11 wherein said program further comprises instructions for:

The object to be identified is prompted to rotate the face such that the eye of the object to be identified looks at the iris recognition module.
The electronic device according to claim 12, wherein the rotation angle of the object to be recognized when the face is rotated ranges from 5° to 10°.
The electronic device according to claim 11, wherein the information of the first iris image comprises a first iris area, the information of the second iris image comprises a second iris area, and the information difference comprises an area difference .
The electronic device according to claim 14, wherein the first iris area comprises a first left iris area and a second left iris area, and the second iris information comprises a first right iris area and a first Two right iris areas, the area difference comprising a left side area difference and a right side area difference; the program further comprising instructions for:

Comparing whether the left side area difference between the first left iris area and the second left iris area is greater than a first preset threshold;

Comparing whether the right side area difference between the first right iris area and the second right iris area is greater than a second predetermined threshold; and

And determining, when the left area difference is greater than the first preset threshold, and the right area difference is greater than the second preset threshold, determining that the iris image collected by the iris recognition module is a living iris image.
A computer readable storage medium, comprising a computer program for use in conjunction with an electronic device capable of imaging, the computer program being executable by a processor to perform the following steps:

And acquiring, by the iris recognition module, a first iris image and a second iris image when the eye is front view and side view of the iris recognition module; and

Determining, according to the information difference between the first iris image and the second iris image, whether the iris image collected by the iris recognition module is a living iris image.
The computer readable storage medium of claim 16 wherein the computer program is further executable by a processor to perform the following steps:

The object to be identified is prompted to rotate the face such that the eye of the object to be identified looks at the iris recognition module.
The computer readable storage medium according to claim 17, wherein the rotation angle of the object to be recognized when the face is rotated ranges from 5° to 10°.
The computer readable storage medium according to claim 16, wherein the information of the first iris image comprises a first iris area, and the information of the second iris image comprises a second iris area, the information difference comprising Area difference.
The computer readable storage medium of claim 19, wherein the first iris area comprises a first left iris area and a second left iris area, the second iris information comprising a first right iris An area and a second right iris area, the area difference comprising a left side area difference and a right side area difference; the computer program being further executable by the processor to perform the following steps:

Comparing whether the left side area difference between the first left iris area and the second left iris area is greater than a first preset threshold;

Comparing whether the right side area difference between the first right iris area and the second right iris area is greater than a second predetermined threshold; and

And determining, when the left area difference is greater than the first preset threshold, and the right area difference is greater than the second preset threshold, determining that the iris image collected by the iris recognition module is a living iris image.