WO2019006707A1

WO2019006707A1 - Iris collection method, electronic device, and computer readable storage medium

Info

Publication number: WO2019006707A1
Application number: PCT/CN2017/091901
Authority: WO
Inventors: 周意保
Original assignee: 广东欧珀移动通信有限公司
Priority date: 2017-07-05
Filing date: 2017-07-05
Publication date: 2019-01-10

Abstract

An iris collection method, an electronic device (100), and a computer readable storage medium. The iris collection method is used for the electronic device (100). The electronic device (100) comprises an iris recognition module (10). The iris recognition module (10) comprises an infrared light source (11). The iris collection method comprises: obtaining a collection distance between an infrared light source (11) and an iris of an object to be recognized (S12); regulating the emission illumination intensity of an emitted infrared ray according to the collection distance, so that the illumination intensity of the infrared ray reaching the iris of the object to be recognized is a target illumination intensity (S14); and collecting an iris image of the object to be recognized by obtaining the infrared ray that is reflected by the iris and that has the target illumination intensity (S16).

Description

Iris acquisition method, electronic device and computer readable storage medium

Technical field

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

Background technique

In some scenes, iris recognition requires infrared light source-assisted shooting to obtain an iris image with better brightness and clear texture. In the iris recognition process, the distance between the user's iris and the iris recognition module is changed, but the illumination intensity of the existing infrared light source is fixed, so when the user distance is long, the infrared light source is irradiated. The light intensity of the human eye may not be high enough, resulting in the iris recognition module not being able to obtain high quality iris images.

Summary of the invention

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

The iris collection method of the embodiment of the present invention is used for an electronic device. The electronic device includes an iris recognition module, and the iris recognition module includes an infrared light source, and the iris collection method includes the following steps:

Obtaining a collection distance between the infrared light source and an iris of the object to be identified;

Adjusting, according to the collection distance, an emission light intensity of the emitted infrared light, so that the illumination intensity of the infrared light reaching the iris of the object to be identified is the target illumination intensity; and

An iris image of the iris is acquired by acquiring infrared light having the target illumination intensity reflected by the iris.

The electronic device of the embodiment of the present invention includes an iris recognition module and an distance detector. The iris recognition module includes an infrared camera and an infrared light source, and the distance detector is configured to acquire between the infrared light source and the iris of the object to be identified. The infrared light source is configured to adjust the emitted light intensity of the emitted infrared light according to the collection distance, so that the illumination intensity of the infrared light reaching the iris of the object to be identified is the target light intensity; the infrared camera An iris image for collecting the iris by acquiring infrared light having the target illumination intensity reflected by the iris.

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. The iris recognition module includes an infrared camera and an infrared light source; the one or more programs are stored in the memory and configured to be executed by the one or more processors, the program including for execution The above instructions for the iris acquisition method.

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

The iris collecting method, the electronic device and the computer readable storage medium of the embodiment of the present invention change the emitted light intensity of the infrared light source according to the collecting distance between the infrared light source and the iris of the object to be identified, so as to be irradiated onto the iris of the object to be identified. The light intensity is always maintained at the optimum light intensity, resulting in an iris image with better brightness and sharpness. 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 an iris collection method according to some embodiments of the present invention.

2 is a schematic plan view 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 flow chart of an iris collection method according to some embodiments of the present invention.

5 is a block diagram of a distance detector in accordance with some embodiments of the present invention.

6 is a schematic diagram of the principle of an iris collection method according to some embodiments of the present invention.

7 is a schematic flow chart of an iris collection method according to some embodiments of the present invention.

8 is a schematic plan view of an electronic device in accordance with some embodiments of the present invention.

9 is a block diagram of a distance detector of some embodiments of the present invention.

FIG. 10 is a schematic flow chart of an iris collection method according to some embodiments of the present invention.

11 is a schematic plan view of an electronic device in accordance with some embodiments of the present invention.

Detailed ways

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 FIG. 1 and FIG. 2, an iris collection method according to an embodiment of the present invention is used in an electronic device 100. The electronic device 100 includes an iris recognition module 10. The iris recognition module 10 includes an infrared light source 11. The iris acquisition method includes the following steps:

S12: acquiring an acquisition distance between the infrared light source 11 and the iris of the object to be identified;

S14: adjusting the emitted light intensity of the emitted infrared light according to the collection distance, so that the illumination intensity of the infrared light reaching the iris of the object to be identified is the target light intensity;

S16: Acquiring an iris image of the iris by acquiring infrared rays having a target illumination intensity reflected by the iris.

Referring to FIG. 2, an iris collection method according to an embodiment of the present invention may 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 10 and a distance detector 20. Step S12 can be implemented by the distance detector 20, step S14 can be implemented by the infrared source 11, and step S16 can be implemented by the infrared camera 12.

That is to say, the distance detector 20 can be used to obtain the acquisition distance between the infrared light source 11 and the iris of the object to be identified; the infrared light source 11 can be used to adjust the emitted light intensity of the emitted infrared light according to the acquisition distance, so that the arrival to be recognized The illumination intensity of the infrared light of the object's iris is the target illumination intensity; the infrared camera 12 can be used to acquire the iris of the object to be identified by acquiring the infrared light having the target illumination intensity reflected by the iris.

Referring to FIG. 3, in some embodiments, the electronic device 100 includes an iris recognition module 10, one or more processors 40, a memory 50, and one or more programs 51. Among them, one or more programs 51 are stored in the memory 50 and configured to be executed by one or more processors 40. Program 51 includes instructions for performing the following steps:

S12: Acquire: a collection distance between the infrared light source 11 and the iris of the object to be identified;

S16: Acquire an iris image to be iris by acquiring infrared light having a target illumination intensity reflected by the iris.

When the infrared camera 10 collects iris images, especially when collecting iris images of Asians, because the iris of Asians is darker in color, it is usually necessary to supplement the light by the infrared light source 11 to obtain an iris image with better brightness and clear texture. . However, in the process of actually collecting the iris image, the distance between the iris of the object to be identified and the iris recognition module 10 is often not fixed, and the existing infrared light source 11 usually uses a fixed emission light intensity to fill the light. When the distance between the object to be identified and the iris recognition module 10 is far away, the light-filling effect of the infrared light source 11 is weakened, thereby affecting the quality of the collected iris image.

The iris collection method according to the embodiment of the present invention changes the emitted light intensity of the infrared light source 11 according to the distance between the infrared light source 11 and the iris of the object to be identified, so that the illumination intensity on the iris irradiated to the object to be identified is always optimally maintained. Intensity, which results in an iris image with better brightness and sharpness.

Referring to FIG. 4, in some embodiments, the distance detector 20 includes a laser ranging sensor 21. Step S12: The acquisition distance between the infrared light source 11 and the iris of the object to be identified includes the following steps:

S1211: transmitting a laser signal;

S1212: receiving the reflected laser signal;

S1213: calculating a plurality of sub-distances according to a time difference between the emitted laser signal and the received reflected laser signal; and

S1214: Determine a maximum value of the plurality of sub-distances as an acquisition distance; or determine a median of the plurality of sub-ranges as an acquisition distance; or determine an average of the plurality of sub-ranges as an acquisition distance.

Referring to FIG. 2 and FIG. 5, in some embodiments, the laser ranging sensor 21 includes a laser emitter 211, Laser receiver 212 and laser processing circuit 213. Step S1211 can be implemented by the laser generator 211, step S1212 can be implemented by the laser receiver 212, and both steps S1213 and S1214 can be implemented by the laser processing circuit 213.

That is, the laser generator 211 can be used to emit a laser signal; the laser receiver 212 can be used to receive the reflected laser signal;

The laser processing circuit 213 can be used to:

Calculating a plurality of sub-ranges based on a time difference between the emitted laser signal and the received reflected laser signal; and

Determining a maximum of the plurality of sub-ranges as an acquisition distance; or determining a median of the plurality of sub-ranges as an acquisition distance; or determining an average of the plurality of sub-distances as an acquisition distance.

Referring again to Figures 2, 3 and 5, in some embodiments, the program 51 includes instructions for performing the following steps:

S1211: Control the laser generator 211 to emit a laser signal;

S1212: Control the laser receiver 212 to receive the reflected laser signal;

Specifically, the laser ranging sensor 21 includes a laser sensor that employs pulse ranging and phase ranging. The laser ranging sensor 21 of the embodiment of the present invention is a laser sensor using pulse ranging. The principle of the laser ranging sensor 21 using the pulse ranging is that the laser generator 211 emits a light pulse, and the light pulse is reflected by the object to be measured (the object to be identified in the embodiment of the present invention is the iris to be identified/the object to be identified) The light pulse is returned to the laser receiver 212 of the laser side pulse ranging sensor. The laser processing circuit 213 calculates the acquisition distance based on the time interval at which the laser ranging sensor 21 transmits and receives the light pulse (i.e., the round-trip propagation time of the light pulse over the distance to be measured) and the propagation speed of the light pulse.

Referring to FIG. 6, a laser ranging sensor 21 according to an embodiment of the present invention has a plurality of laser generators 211 for emitting laser signals in an array, and the laser signals of each laser generator 211 are emitted in different directions and emitted laser signals. The wavelength of light is different. The ranging process of the laser ranging sensor 21 in the number of laser generators 211 in the laser ranging sensor 21 will be described in detail. When the laser ranging sensor 21 is in operation, the nine laser generators 211 simultaneously or time-divisionally emit laser signals, and the laser signals emitted from the nine laser generators 211 respectively reach the nine regions of the object to be identified in the space. The laser signal is reflected after reaching the object to be identified, and the laser receiver 212 is provided with filters of various wavelength bands, and each filter corresponds to the wavelength of the light of the laser signal emitted by the nine laser generators 211, that is, The filter provided corresponding to each of the laser generators 211 can pass only the light of the wavelength band in which the laser signal of the laser generator 211 is located, and filter out the light of other wavelength bands. Thus, the laser ranging sensor 21 is divided into nine receiving areas. Since the time difference of the respective laser generators 211 emitting the laser signal and receiving the laser signal is different, the laser processing circuit 213 selects one of the nine sub-ranges or one sub-range from the nine sub-ranges as the acquisition distance. Specifically, you can take 9 The median or average value of the sub-distances is taken as the acquisition distance; or, the maximum of the nine sub-distances may be taken as the acquisition distance.

The coverage of the laser signal emitted by the laser ranging sensor 21 should match the field of view of the infrared camera 12 in the iris recognition module 10. For example, the coverage of the laser signal is equal to the field of view of the infrared camera 12; alternatively, the coverage of the laser signal is slightly larger than the field of view of the infrared camera 12. In this way, it is ensured that the value of the acquisition distance obtained by the last laser ranging sensor 21 is more accurate.

In some embodiments, the laser generator 211 and the infrared source 11 are the same component, and the infrared source 11 can emit an infrared laser.

In this way, the infrared light source 11 can not only assist the iris recognition module 10 to collect the iris of the object to be identified, but also assist the laser side sensor to measure the distance between the iris recognition module 10 and the iris of the object to be identified, thereby realizing the multiplexing of the infrared light source 11. The multiplexing of the infrared light source 11 can reduce the number of components included in the electronic device 100, and can reduce the proportion of the laser ranging sensor 21 on the electronic device 100 to a certain extent, so that the electronic device 100 can be more wide-screened or freed up. Integrate more features.

Referring to FIGS. 7 , 8 , and 9 , in some embodiments, the distance sensor includes an infrared ranging sensor 22 . Step S12: The acquisition distance between the infrared light source 11 and the iris of the object to be identified includes the following steps:

S1221: transmitting an infrared light signal;

S1222: receiving the reflected infrared light signal;

S1223: calculating a plurality of sub-ranges according to a time difference between the emitted infrared light signal and the received reflected: infrared light signal; and

S1224: Determine a maximum value of the plurality of sub-ranges as an acquisition distance; or determine a median of the plurality of sub-ranges as an acquisition distance; or determine an average of the plurality of sub-ranges as an acquisition distance.

Referring to FIGS. 8 and 9 , in some embodiments, the infrared ranging sensor 22 includes an infrared light generator 221 , an infrared light receiver 222 , and an infrared light processing circuit 223 . Step S1221 may be implemented by the infrared light generator 221, step S1222 may be implemented by the infrared light receiver 222, and step S1223 and step S1224 may be implemented by the infrared light processing circuit 223.

That is, the infrared light generator 221 can be used to emit an infrared light signal; the infrared light receiver 222 can be used to receive the reflected infrared light signal;

The infrared light processing circuit 223 can be used to:

Calculating a plurality of sub-ranges based on a time difference between the emitted infrared light signal and the received reflected infrared light signal; and

Referring again to Figures 3, 8, and 9, in some embodiments, the program 51 further includes instructions for performing the following steps:

S1221: controlling the infrared light generator 221 to emit an infrared light signal;

S1222: Control the infrared light receiver 222 to receive the reflected infrared light signal;

S1223: Calculate a plurality of sub-ranges according to a time difference between the emitted infrared light signal and the received reflected infrared light signal; and

Similar to the laser ranging sensor 21, the infrared ranging sensor 22 is also based on the time difference between the emitted infrared light signal and the received reflected infrared light signal (ie, the round-trip propagation time of the infrared light signal over the distance to be measured), and the propagation of the infrared light signal. Speed to calculate the acquisition distance. The infrared ranging sensor 22 of the embodiment of the present invention also has a plurality of infrared light generators 221 for emitting infrared light signals distributed in an array, each of the infrared light generators 221 having different infrared light signal emission directions and emitting infrared rays. The wavelength of light of an optical signal is different. The infrared light receiver 222 has filters corresponding to the light wavelengths of the respective infrared light signals, so that a plurality of time difference data can be obtained, and a plurality of sub-distances can be calculated from the plurality of time difference data. The infrared light processing circuit 223 selects a plurality of sub-ranges or selects one sub-distance from the plurality of sub-ranges as the acquisition distance. Specifically, the infrared light processing circuit 223 may take the median or average value of the plurality of sub-ranges as the acquisition distance; or the infrared light processing circuit 223 may take the maximum of the plurality of sub-ranges as the acquisition distance.

The coverage of the infrared light signal emitted by the infrared ranging sensor 22 should match the field of view of the infrared camera 12 in the iris recognition module 10. For example, the coverage of the infrared light signal is equal to the field of view of the infrared camera 12; alternatively, the coverage of the infrared light signal is slightly larger than the field of view of the infrared camera 12. In this way, it is ensured that the value of the acquisition distance obtained by the last infrared ranging sensor 22 is more accurate.

In some embodiments, the infrared light generator 221 and the infrared light source 11 are the same component, and the infrared light source 11 can emit infrared light.

In this way, the infrared light source 11 can not only assist the iris recognition module 10 to collect the iris of the object to be identified, but also assist the infrared distance measuring sensor 22 to measure the distance between the iris recognition module 10 and the iris of the object to be identified, thereby realizing the multiplexing of the infrared light source 11. . The multiplexing of the infrared light source 11 can reduce the number of components included in the electronic device 100, and can reduce the proportion of the infrared ranging sensor 22 on the electronic device 100 to a certain extent, so that the electronic device 100 can be more wide-screened or freed up. Integrate more features.

Referring to FIG. 10, in some embodiments, the iris collection method of the embodiment of the present invention further includes:

S11: capturing a facial image of the object to be identified;

Step S12: The acquisition distance between the infrared light source 11 and the iris of the object to be identified includes the following steps:

S1231: processing a facial image to obtain an iris region;

S1232: calculating a ratio of an area of the iris area to an area of the facial image; and

S1233: Determine the acquisition distance according to the scale.

Referring to FIG. 11, in some embodiments, step S11 can be implemented by the infrared camera 12, and step S1231, step S1232, and step S1233 can be implemented by the distance detector 20. The distance detector 20 is now the processor 40.

That is to say, the infrared camera 12 can be used to capture a face image of an object to be recognized.

The distance detector 20 can be used to:

Processing a facial image to obtain an iris region;

Calculating the ratio of the area of the iris area to the area of the facial image; and

The collection distance is determined according to the scale.

Referring again to FIG. 3, in some embodiments, the program 51 further includes instructions for performing the following steps:

S11: controlling the infrared camera 12 to capture a facial image of the object to be identified;

S1231: processing a facial image to obtain an iris region;

S1233: Determine the acquisition distance according to the scale.

In some embodiments, the electronic device 100 further includes a visible light camera 30, and step S11 can be implemented by the visible light camera 30. That is to say, the visible light camera 30 can be used to capture a face image of an object to be recognized.

First, a face image of an object to be recognized is captured by the infrared camera 12 or the visible light camera 30. Processor 40 then processes the facial image to extract portions of the iris region. Specifically, if the facial image is captured by the infrared camera 12, the processor 40 directly extracts the contour edge of the facial image, and performs a Hough circular transformation on the image extracted by the contour edge to obtain a portion of the iris region; When the image is captured by the visible light camera 30, the processor 40 first converts the face image in the RGB format into the face image in the YCrCb format, and then performs contour edge extraction and Hough circle transformation on the face image in the YCrCb format to extract the iris. region. After extracting into the iris area, the ratio of the area of the iris area to the area of the face image is calculated. The proportion of the iris area in the entire facial image has a certain mapping relationship with the collection distance. The above mapping relationship can be obtained through a large number of implementations. The mapping relationship is stored in the memory 50. After the processor 40 calculates the ratio, the acquisition distance can be determined according to the ratio, that is, the mapping relationship.

In some embodiments, adjusting the emitted light intensity of the infrared light according to the acquisition distance is achieved by adjusting the operating current of the infrared light source 11. The farther the iris recognition module 10 is collected from the object to be identified, the larger the operating current of the infrared light source 11 is, and the closer the collection distance is, the smaller the operating current of the infrared light source 11 is.

It can be understood that the greater the emission power of the infrared light source 11, the stronger the intensity of the emitted light of the infrared light emitted by the infrared light source 11. The emission power of the infrared light source 11 is positively correlated with the operating current in the case where other conditions such as resistance are constant. Therefore, by increasing the operating current of the infrared light source 11, the emission power of the infrared light source 11 is increased, and the intensity of the emitted light of the infrared light is also stronger. The iris collection method of the embodiment of the present invention is such that the illumination intensity of the infrared light reaching the iris of the object to be identified is the target illumination intensity, and the target illumination intensity is a superior illumination intensity. Under the illumination of the illumination intensity, the iris recognition module 10 can get iris images with better brightness and clear texture. Target light The collection distance corresponding to the intensity is the standard collection distance. After the distance detector 20 detects the collection distance, the iris recognition module 10 can compare the collection distance with the standard collection distance. If the collection distance is larger than the standard collection distance, the iris recognition module 10 is separated from the object to be identified. Farther, at this time, the working current should be increased, so that the intensity of the emitted light of the infrared light emitted by the infrared light source 11 is enhanced, so that the light intensity of the infrared light reaching the iris of the object to be recognized can reach the target light intensity; The standard acquisition distance is small, indicating that the iris recognition module 10 is close to the object to be identified. At this time, the working current should be reduced, so that the intensity of the infrared light emitted by the infrared light source 11 is weakened, thereby reaching in the infrared light. The illumination intensity of the iris of the object to be identified can be reduced to the target illumination intensity. In this way, the infrared camera 12 can acquire the iris of the object to be identified by acquiring the infrared light having the target illumination intensity reflected by the iris, thereby obtaining a better quality iris image.

Referring again to FIG. 3, in certain embodiments, 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 processor 40 to perform the iris acquisition method of any of the above embodiments.

For example, a computer program can be executed by processor 40 to perform the iris acquisition method described in the following steps:

S16: collecting the iris of the object to be identified by acquiring infrared rays having the target illumination intensity reflected by the iris.

As another example, a computer program can be executed by processor 40 to perform the iris acquisition method described in the following steps:

S1211: Control the laser generator 211 to emit a laser signal;

S1212: Control the laser receiver 212 to receive the reflected laser signal;

S1231: processing a facial image to obtain an iris region;

S1233: Determine the acquisition distance according to the scale.

Furthermore, the computer program can also be executed by the processor 40 to complete the iris acquisition method described in the step of controlling the visible light camera 30 to capture a facial image of the object to be identified.

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 circuit, ASIC with suitable combination logic gate, programmable gate array (PGA), on-site Programmable Gate Array (FPGA), 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

An iris collection method for an electronic device, wherein the electronic device comprises an iris recognition module, the iris recognition module comprises an infrared light source, and the iris collection method comprises the following steps:

Obtaining a collection distance between the infrared light source and an iris of the object to be identified;

Adjusting, according to the collection distance, an emission light intensity of the emitted infrared light, so that the illumination intensity of the infrared light reaching the iris of the object to be identified is the target illumination intensity; and

An iris image of the iris is acquired by acquiring infrared light having the target illumination intensity reflected by the iris.
The iris collecting method according to claim 1, wherein the electronic device comprises a distance detector, the distance detector comprises a laser ranging sensor, and the acquiring the infrared light source and the iris of the object to be identified The steps of collecting distance include the following steps:

Transmitting a laser signal;

Receiving the reflected laser signal;

Calculating a plurality of sub-ranges based on a time difference between transmitting the laser signal and receiving the reflected laser signal; and

Determining a maximum value of the plurality of sub-ranges as the collection distance; or determining a median of the plurality of sub-ranges as the collection distance; or determining an average of the plurality of sub-ranges as the collection distance.
The iris collecting method according to claim 1, wherein the electronic device comprises a distance detector, the distance detector comprises an infrared ranging sensor, and the acquiring the infrared light source and the iris of the object to be identified The steps of collecting distance include the following steps:

Transmitting an infrared light signal;

Receiving the reflected infrared light signal;

Calculating a plurality of sub-ranges based on a time difference between the emitted infrared light signal and the reflected infrared light signal; and

Determining a maximum value of the plurality of sub-ranges as the collection distance; or determining a median of the plurality of sub-ranges as the collection distance; or determining an average of the plurality of sub-ranges as the collection distance.
The iris collection method according to claim 1, wherein the iris collection method further comprises:

Taking a face image of the object to be identified;

The step of acquiring the collection distance between the infrared light source and the iris of the object to be identified includes the following steps:

Processing the facial image to obtain an iris region;

Calculating a ratio of an area of the iris area to an area of the facial image; and

The acquisition distance is determined according to the ratio.
The iris collecting method according to claim 4, wherein the electronic device comprises an infrared camera, and the capturing the facial image of the object to be recognized comprises capturing the facial image by using the infrared light camera; or /with

The electronic device includes a visible light camera, and the capturing a facial image of the object to be identified includes capturing the facial image with the visible light camera.
The iris collecting method according to claim 1, wherein the adjusting the emitted light intensity of the emitted infrared light according to the collecting distance is realized by adjusting an operating current of the infrared light source.
The iris collection method according to claim 6, wherein the further the collection distance is, the larger the working current is; the closer the collection distance is, the smaller the working current is.
An electronic device, comprising: an iris recognition module and a distance detector, wherein the iris recognition module comprises an infrared camera and an infrared light source, wherein the distance detector is configured to acquire the infrared light source and to be identified The distance between the irises of the object;

The infrared light source is configured to adjust an emission light intensity of the emitted infrared light according to the collection distance, so that the illumination intensity of the infrared light reaching the iris of the object to be identified is the target illumination intensity;

The infrared camera is configured to acquire an iris image of the iris by acquiring infrared light having the target illumination intensity reflected by the iris.
The electronic device according to claim 8, wherein the distance detector comprises a laser ranging sensor, and the laser ranging sensor comprises:

a laser generator for emitting a laser signal;

a laser receiver for receiving the reflected laser signal; and

a laser processing circuit for:

Calculating a plurality of sub-ranges based on a time difference between transmitting the laser signal and receiving the reflected laser signal; and

Determining a maximum value of the plurality of sub-ranges as the collection distance; or determining a median of the plurality of sub-ranges as the collection distance; or determining an average of the plurality of sub-ranges as the collection distance.
The electronic device according to claim 9, wherein said laser generator and said infrared light source are the same component and are used to emit infrared laser light.
The electronic device according to claim 8, wherein the distance detector comprises an infrared ranging sensor, and the infrared ranging sensor comprises:

An infrared light generator for emitting an infrared light signal;

An infrared light receiver for receiving the reflected infrared light signal; and

An infrared light processing circuit for:

Calculating a plurality of sub-ranges based on a time difference between transmitting the infrared light signal and receiving the reflected infrared light signal; and

Determining a maximum value of the plurality of sub-ranges as the collection distance; or determining a median of the plurality of sub-ranges as the collection distance; or determining an average of the plurality of sub-ranges as the collection distance.
The electronic device according to claim 11, wherein said infrared light generator and said infrared light source are the same component and are used to emit infrared light.
The electronic device according to claim 8, wherein the infrared camera is further configured to capture a facial image of the object to be identified;

The distance detector is used to:

Processing the facial image to obtain an iris region;

Calculating a ratio of an area of the iris area to an area of the facial image; and

The acquisition distance is determined according to the ratio.
The electronic device according to claim 8, wherein the electronic device further comprises a visible light camera, wherein the visible light camera is configured to capture a facial image of the object to be identified;

The distance detector is used to:

Processing the facial image to obtain an iris region;

Calculating a ratio of an area of the iris area to an area of the facial image; and

The acquisition distance is determined according to the ratio.
The electronic device according to claim 8, wherein the adjusting the emitted light intensity of the emitted infrared light according to the collection distance is achieved by adjusting an operating current of the infrared light source.
The electronic device according to claim 15, wherein the further the collection distance is, the larger the operating current is; the closer the collection distance is, the smaller the operating current is.
An electronic device, the electronic device comprising:

An iris recognition module, the iris recognition module comprising an infrared camera and an infrared light source;

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:

Obtaining a collection distance between the infrared light source and an iris of the object to be identified;

Adjusting, according to the collection distance, an emission light intensity of the emitted infrared light, so that the illumination intensity of the infrared light reaching the iris of the object to be identified is the target illumination intensity; and

An iris image of the iris is acquired by acquiring infrared light having the target illumination intensity reflected by the iris.
The electronic device according to claim 17, wherein said electronic device comprises a distance detector, said distance detector comprising a laser ranging sensor, said laser ranging sensor comprising a laser generator and a laser receiver, The program also includes instructions for the following steps:

Controlling the laser generator to emit a laser signal;

Controlling the laser receiver to receive the reflected laser signal;

Calculating a plurality of sub-ranges based on a time difference between transmitting the laser signal and receiving the reflected laser signal; and

Determining a maximum value of the plurality of sub-ranges as the collection distance; or determining a median of the plurality of sub-ranges as the collection distance; or determining an average of the plurality of sub-ranges as the collection distance.
The electronic device according to claim 17, wherein said electronic device comprises a distance detector, said distance detector comprises an infrared ranging sensor, said infrared ranging sensor comprising an infrared light generator and an infrared light receiver The program also includes instructions for the following steps:

Controlling the infrared light generator to emit an infrared light signal;

Controlling the infrared light receiver to receive the reflected infrared light signal;

Calculating a plurality of sub-ranges based on a time difference between the emitted infrared light signal and the reflected infrared light signal; and

Determining a maximum value of the plurality of sub-ranges as the collection distance; or determining a median of the plurality of sub-ranges as the collection distance; or determining an average of the plurality of sub-ranges as the collection distance.
The electronic device of claim 17, wherein the program further comprises instructions for:

Controlling, by the infrared camera, a face image of the object to be identified;

Processing the facial image to obtain an iris region;

Calculating a ratio of an area of the iris area to an area of the facial image; and

The acquisition distance is determined according to the ratio.
The electronic device according to claim 17, wherein said electronic device further comprises a visible light camera, and said program further comprises instructions for:

Controlling the visible light camera to capture a facial image of the object to be identified;

Processing the facial image to obtain an iris region;

Calculating a ratio of an area of the iris area to an area of the facial image; and

The acquisition distance is determined according to the ratio.
The electronic device according to claim 17, wherein the adjusting the emitted light intensity of the emitted infrared light according to the collection distance is achieved by adjusting an operating current of the infrared light source.
The electronic device according to claim 22, wherein the further the collection distance is, the larger the operating current is; the closer the collection distance is, the smaller the operating current is.
A computer readable storage medium, comprising: in combination with an electronic device capable of imaging a computer program, the electronic device comprising an iris recognition module, the iris recognition module comprising an infrared camera and an infrared light source, the computer program being executable by the processor to perform the iris acquisition method described in the following steps:

Obtaining a collection distance between the infrared light source and an iris of the object to be identified;

Adjusting, according to the collection distance, an emission light intensity of the emitted infrared light, so that the illumination intensity of the infrared light reaching the iris of the object to be identified is the target illumination intensity; and

An iris image of the iris is acquired by acquiring infrared light having the target illumination intensity reflected by the iris.
A computer readable storage medium according to claim 24, wherein said electronic device comprises a distance detector, said distance detector comprising a laser ranging sensor, said laser ranging sensor comprising a laser generator and laser receiving The computer program can also be executed by the processor to perform the iris acquisition method described in the following steps:

Controlling the laser generator to emit a laser signal;

Controlling the laser receiver to receive the reflected laser signal;

Calculating a plurality of sub-ranges based on a time difference between transmitting the laser signal and receiving the reflected laser signal; and

Determining a maximum value of the plurality of sub-ranges as the collection distance; or determining a median of the plurality of sub-ranges as the collection distance; or determining an average of the plurality of sub-ranges as the collection distance.
A computer readable storage medium according to claim 24, wherein said electronic device comprises a distance detector, said distance detector comprising an infrared ranging sensor, said infrared ranging sensor comprising an infrared light generator and infrared An optical receiver, the computer program being further executable by the processor to perform the iris acquisition method described in the following steps:

Controlling the infrared light generator to emit an infrared light signal;

Controlling the infrared light receiver to receive the reflected infrared light signal;

Calculating a plurality of sub-ranges based on a time difference between the emitted infrared light signal and the reflected infrared light signal; and

Determining a maximum value of the plurality of sub-ranges as the collection distance; or determining a median of the plurality of sub-ranges as the collection distance; or determining an average of the plurality of sub-ranges as the collection distance.
A computer readable storage medium according to claim 24, wherein said computer program is further Executed by the processor to perform the iris acquisition method described in the following steps:

Controlling, by the infrared camera, a face image of the object to be identified;

Processing the facial image to obtain an iris region;

Calculating a ratio of an area of the iris area to an area of the facial image; and

The acquisition distance is determined according to the ratio.
The computer readable storage medium of claim 24, wherein the electronic device further comprises a visible light camera, the computer program being further executable by the processor to perform the iris acquisition method described in the following steps:

Controlling the visible light camera to capture a facial image of the object to be identified;

Processing the facial image to obtain an iris region;

Calculating a ratio of an area of the iris area to an area of the facial image; and

The acquisition distance is determined according to the ratio.
The computer readable storage medium according to claim 24, wherein said adjusting the emitted light intensity of the emitted infrared light according to said acquisition distance is achieved by adjusting an operating current of said infrared light source.
The computer readable storage medium according to claim 29, wherein the further the collection distance is, the larger the operating current is; the closer the collection distance is, the smaller the operating current is.