CN110956054A - Iris image acquisition method and terminal - Google Patents
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Abstract
The embodiment of the invention provides an iris image acquisition method and a terminal, wherein the height value of human eyes is determined, and the irradiation angle of a near-infrared light source is adjusted according to the height value of the human eyes, so that the human eyes can select an iris camera matched with the height value of the human eyes to acquire iris images within the irradiation range of the near-infrared light source according to the height value of the human eyes.
Description
Technical Field
The embodiment of the invention relates to the technical field of iris image acquisition, in particular to an iris image acquisition method and a terminal.
Background
The iris identification has accuracy, stability, safety, uniqueness and non-contact property, is a hotspot in the field of biological feature identification research, and has wide development prospect.
At present, the commercial iris recognition mature product has the limitations of recognition distance, recognition height, recognition speed and the like. The mainstream iris recognition system in the market has the advantages of limited effective recognition distance, limitation on the height of people, strict requirements on conditions such as ambient light and the like, and long acquisition time.
Some research institutions have made relevant research on long-distance iris recognition technology in recent years, and mature iris recognition patent products, such as lenses with low pixels and short focal lengths (such as CN106557738A and CN107463884A), have short iris recognition distance, or adopt a long-focus lens (such as CN206480000U), have a small recognition range, are difficult to consider people with various heights, are limited in iris image imaging quality and imaging range, are difficult to accept or reject between high resolution and large view field requirements in long-distance recognition, and are difficult to achieve comprehensive coverage for people with different heights.
Disclosure of Invention
In order to solve the technical problems or at least partially solve the technical problems, embodiments of the present invention provide an iris image acquisition method and a terminal.
In view of the above, in a first aspect, an embodiment of the present invention provides an iris image acquisition method, which is applied to an iris image acquisition system, where the iris image acquisition system includes: the method comprises the following steps of detecting the position, adjusting the irradiation angle of a near infrared light source and longitudinally arranging a plurality of iris cameras, wherein the method comprises the following steps:
acquiring the height value of the human eye when the detected target detected by the position detection device is positioned in a preset detection area;
adjusting the irradiation angle of the near-infrared light source according to the height value of the human eye, so that the human eye is in the irradiation range of the near-infrared light source;
selecting an iris camera with a height value matched with the height value of the human eyes from the plurality of iris cameras longitudinally arranged as a preferred iris camera according to the height value of the human eyes;
and acquiring an iris image of the measured target by adopting the preferred iris camera.
Optionally, the method for obtaining the eye height value of the detected object located in the preset detection area, before, further includes:
acquiring a distance value between the detected target detected by the position detection device and the position detection device when the detected target is positioned in a preset detection area;
and sending an adjusting command to the measured target according to the distance value, so that the measured target adjusts the position of the face to be within the iris image acquisition range of the iris image acquisition system.
Optionally, if the iris camera is a zoom camera, acquiring the iris image of the target to be detected by using the preferred iris camera, before, further comprising:
acquiring a distance value between the detected target detected by the position detection device and the position detection device when the detected target is positioned in a preset detection area;
and according to the distance value, adjusting the focal length of the preferred iris camera so that the human face is positioned in the focal length of the preferred iris camera.
In a second aspect, an embodiment of the present invention provides an iris image capturing terminal, including a processor and a memory, where the processor is configured to execute a program corresponding to the iris image capturing method according to the first aspect stored in the memory, so as to implement the following steps:
acquiring the height value of the human eye when the detected target detected by the position detection device is positioned in a preset detection area;
adjusting the irradiation angle of the near-infrared light source according to the height value of the human eye, so that the human eye is in the irradiation range of the near-infrared light source;
selecting an iris camera with a height value matched with the height value of the human eyes from the plurality of iris cameras longitudinally arranged as a preferred iris camera according to the height value of the human eyes;
and acquiring an iris image of the measured target by adopting the preferred iris camera.
Optionally, the method for obtaining the eye height value of the detected object located in the preset detection area, before, further includes:
acquiring a distance value between the detected target detected by the position detection device and the position detection device when the detected target is positioned in a preset detection area;
and sending an adjusting command to the measured target according to the distance value, so that the measured target adjusts the position of the face to be within the iris image acquisition range of the iris image acquisition system.
Optionally, if the iris camera is a zoom camera, acquiring the iris image of the target to be detected by using the preferred iris camera, before, further comprising:
acquiring a distance value between the detected target detected by the position detection device and the position detection device when the detected target is positioned in a preset detection area;
and according to the distance value, adjusting the focal length of the preferred iris camera so that the human face is positioned in the focal length of the preferred iris camera.
In a third aspect, an embodiment of the present invention provides an iris image acquisition system, including: the iris image acquisition terminal, the position detection device, the near-infrared light source with adjustable irradiation angle and the plurality of iris cameras which are longitudinally arranged are arranged;
the position detection device comprises a face detection device which is configured to detect a human eye height value of a detected target.
Optionally, the position detecting device further comprises a laser range finder;
the laser range finder is configured to detect a distance value between a target under test and the laser range finder.
Optionally, the face detection device includes a face camera and a face recognition device;
the face camera is configured to acquire an image of a detected target;
the face recognition device is configured to recognize a face of the detected target according to the image of the detected target, and an eye height value is obtained according to the face.
Compared with the prior art, the iris image acquisition method and the terminal provided by the embodiment of the invention have the advantages that the height value of human eyes is determined, the irradiation angle of the near-infrared light source is adjusted according to the height value of the human eyes, so that the human eyes can select the iris camera matched with the height value of the human eyes to acquire the iris image within the irradiation range of the near-infrared light source according to the height value of the human eyes.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a flowchart of an iris image acquisition method according to an embodiment of the present invention;
fig. 2 is a flowchart of an iris image acquisition method according to a second embodiment of the present invention;
fig. 3 is a flowchart of an iris image acquisition method according to a third embodiment of the present invention;
fig. 4 is a flowchart of an iris image acquisition method according to a fourth embodiment of the present invention;
fig. 5 is a schematic diagram of an iris image acquisition terminal according to a fifth embodiment of the present invention;
fig. 6 is a schematic diagram of an iris image acquisition system according to a sixth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
A mobile terminal implementing various embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in themselves. Thus, "module" and "component" may be used in a mixture.
The mobile terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a smart phone, a notebook computer, a digital broadcast receiver, a PDA (personal digital assistant), a PAD (tablet computer), a PMP (portable multimedia player), a navigation device, and the like, and a stationary terminal such as a digital TV, a desktop computer, and the like. In the following, it is assumed that the terminal is a mobile terminal. However, it will be understood by those skilled in the art that the configuration according to the embodiment of the present invention can be applied to a fixed type terminal in addition to elements particularly used for moving purposes.
Example one
Referring to fig. 1, fig. 1 is a flowchart of an iris image acquisition method according to an embodiment of the present invention, and the iris image acquisition method is applied to an iris image acquisition system, where the iris image acquisition system includes: the method comprises the following steps of detecting the position, adjusting the irradiation angle of a near infrared light source and longitudinally arranging a plurality of iris cameras, wherein the method comprises the following steps:
acquiring the height value of the human eye when the detected target detected by the position detection device is positioned in a preset detection area;
adjusting the irradiation angle of the near-infrared light source according to the height value of the human eye, so that the human eye is in the irradiation range of the near-infrared light source;
selecting an iris camera with a height value matched with the height value of the human eyes from the plurality of iris cameras longitudinally arranged as a preferred iris camera according to the height value of the human eyes;
and acquiring an iris image of the measured target by adopting the preferred iris camera.
Example two
Referring to fig. 2, fig. 2 is a flowchart of an iris image acquisition method according to an embodiment of the present invention, and the iris image acquisition method is applied to an iris image acquisition system, where the iris image acquisition system includes: the method comprises the following steps of detecting the position, adjusting the irradiation angle of a near infrared light source and longitudinally arranging a plurality of iris cameras, wherein the method comprises the following steps:
acquiring a human eye height value of a detected target in a preset detection area and a distance value between the detected target and the position detection device, wherein the detected target is detected by the position detection device;
according to the distance value, sending an adjusting command to the detected target to enable the detected target to adjust the position of the face to be within the iris image acquisition range of the iris image acquisition system;
adjusting the irradiation angle of the near-infrared light source according to the height value of the human eye, so that the human eye is in the irradiation range of the near-infrared light source;
selecting an iris camera with a height value matched with the height value of the human eyes from the plurality of iris cameras longitudinally arranged as a preferred iris camera according to the height value of the human eyes;
and acquiring an iris image of the measured target by adopting the preferred iris camera.
EXAMPLE III
Referring to fig. 3, fig. 3 is a flowchart of an iris image acquisition method according to an embodiment of the present invention, which is applied to an iris image acquisition system, where the iris image acquisition system includes: the method comprises the following steps of detecting the position, adjusting the irradiation angle of a near infrared light source and a plurality of iris cameras which are longitudinally arranged, wherein the iris cameras are zoom cameras, and the method comprises the following steps:
acquiring a human eye height value of a detected target in a preset detection area and a distance value between the detected target and the position detection device, wherein the detected target is detected by the position detection device;
adjusting the irradiation angle of the near-infrared light source according to the height value of the human eye, so that the human eye is in the irradiation range of the near-infrared light source;
selecting an iris camera with a focal length matched with the human eye height value from the plurality of iris cameras as a preferred iris camera according to the human eye height value;
according to the distance value, adjusting the focal length of the preferred iris camera to enable the human face to be located within the focal length of the preferred iris camera;
and acquiring an iris image of the measured target by adopting the preferred iris camera.
Example four
Referring to fig. 4, fig. 4 is a flowchart of an iris image acquisition method according to an embodiment of the present invention, which is applied to an iris image acquisition system, where the iris image acquisition system includes: the method comprises the following steps of detecting the position, adjusting the irradiation angle of a near infrared light source and a plurality of iris cameras which are longitudinally arranged, wherein the iris cameras are zoom cameras, and the method comprises the following steps:
acquiring a human eye height value of a detected target in a preset detection area and a distance value between the detected target and the position detection device, wherein the detected target is detected by the position detection device;
according to the distance value, sending an adjusting command to the detected target to enable the detected target to adjust the position of the face to be within the iris image acquisition range of the iris image acquisition system;
adjusting the irradiation angle of the near-infrared light source according to the height value of the human eye, so that the human eye is in the irradiation range of the near-infrared light source;
selecting an iris camera with a height value matched with the height value of the human eyes from the plurality of iris cameras longitudinally arranged as a preferred iris camera according to the height value of the human eyes;
according to the distance value, adjusting the focal length of the preferred iris camera to enable the human face to be located within the focal length of the preferred iris camera;
and acquiring an iris image of the measured target by adopting the preferred iris camera.
EXAMPLE five
Referring to fig. 5, fig. 5 is a schematic diagram of an iris image acquisition terminal according to an embodiment of the present invention, where the iris image acquisition terminal includes a processor and a memory, and the processor is configured to execute a program corresponding to an iris image acquisition method stored in the memory, so as to implement the following steps:
acquiring the height value of the human eye when the detected target detected by the position detection device is positioned in a preset detection area;
adjusting the irradiation angle of the near-infrared light source according to the height value of the human eye, so that the human eye is in the irradiation range of the near-infrared light source;
selecting an iris camera with a height value matched with the height value of the human eyes from the plurality of iris cameras longitudinally arranged as a preferred iris camera according to the height value of the human eyes;
and acquiring an iris image of the measured target by adopting the preferred iris camera.
Optionally, the method for obtaining the eye height value of the detected object located in the preset detection area, before, further includes:
acquiring a distance value between the detected target detected by the position detection device and the position detection device when the detected target is positioned in a preset detection area;
and sending an adjusting command to the measured target according to the distance value, so that the measured target adjusts the position of the face to be within the iris image acquisition range of the iris image acquisition system.
Optionally, if the iris camera is a zoom camera, acquiring the iris image of the target to be detected by using the preferred iris camera, before, further comprising:
acquiring a distance value between the detected target detected by the position detection device and the position detection device when the detected target is positioned in a preset detection area;
and according to the distance value, adjusting the focal length of the preferred iris camera so that the human face is positioned in the focal length of the preferred iris camera.
EXAMPLE six
Referring to fig. 6, fig. 6 is a schematic diagram of an iris image acquisition system according to an embodiment of the present invention, including: the iris image acquisition terminal, position detection device, shine near-infrared light source and the multiple iris camera of longitudinal arrangement of angle adjustable.
The position detection device comprises a face detection device which is configured to detect a human eye height value of a detected target.
Optionally, the position detecting device further comprises a laser range finder;
the laser range finder is configured to detect a distance value between a target under test and the laser range finder.
The laser range finder is adopted to carry out range finding feedback with high speed and high measurement precision.
Optionally, the face detection device includes a face camera and a face recognition device;
the face camera is configured to acquire an image of a detected target;
the face recognition device is configured to recognize a face of the detected target according to the image of the detected target, and an eye height value is obtained according to the face.
Optionally, the face camera is a large-view-field large-depth-of-field short-focus camera;
the large-view-field large-depth-of-field short-focus camera acquires an image of a detected target, the face recognition device recognizes a face in the image, and the height value of the eyes is determined according to a preset two-dimensional coordinate system.
The iris image acquisition terminal comprises a processor and a memory, wherein the processor is configured to execute a program corresponding to the iris image acquisition method stored in the memory so as to realize the following steps:
acquiring the height value of the human eye when the detected target detected by the position detection device is positioned in a preset detection area;
adjusting the irradiation angle of the near-infrared light source according to the height value of the human eye, so that the human eye is in the irradiation range of the near-infrared light source;
selecting an iris camera with a height value matched with the height value of the human eyes from the plurality of iris cameras longitudinally arranged as a preferred iris camera according to the height value of the human eyes;
and acquiring an iris image of the measured target by adopting the preferred iris camera.
Optionally, the method for obtaining the eye height value of the detected object located in the preset detection area, before, further includes:
acquiring a distance value between the detected target detected by the position detection device and the position detection device when the detected target is positioned in a preset detection area;
and sending an adjusting command to the measured target according to the distance value, so that the measured target adjusts the position of the face to be within the iris image acquisition range of the iris image acquisition system.
Optionally, if the iris camera is a zoom camera, acquiring the iris image of the target to be detected by using the preferred iris camera, before, further comprising:
acquiring a distance value between the detected target detected by the position detection device and the position detection device when the detected target is positioned in a preset detection area;
and according to the distance value, adjusting the focal length of the preferred iris camera so that the human face is positioned in the focal length of the preferred iris camera.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described herein may be implemented by means of units performing the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one type of logical function division, and other division manners may be available in actual implementation, for example, a plurality of units or components may be combined or integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Through the above description of the embodiments, those skilled in the art will clearly understand that the methods described in the embodiments of the present invention can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention or the method according to some parts of the embodiments.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. An iris image acquisition method is applied to an iris image acquisition system, and is characterized in that the iris image acquisition system comprises: the method comprises the following steps of detecting the position, adjusting the irradiation angle of a near infrared light source and longitudinally arranging a plurality of iris cameras, wherein the method comprises the following steps:
acquiring the height value of the human eye when the detected target detected by the position detection device is positioned in a preset detection area;
adjusting the irradiation angle of the near-infrared light source according to the height value of the human eye, so that the human eye is in the irradiation range of the near-infrared light source;
selecting an iris camera with a height value matched with the height value of the human eyes from the plurality of iris cameras longitudinally arranged as a preferred iris camera according to the height value of the human eyes;
and acquiring an iris image of the measured target by adopting the preferred iris camera.
2. An iris image collecting method according to claim 1, wherein the obtaining of the eye height value when the detected object detected by the position detecting device is located in the preset detecting area further comprises:
acquiring a distance value between the detected target detected by the position detection device and the position detection device when the detected target is positioned in a preset detection area;
and sending an adjusting command to the measured target according to the distance value, so that the measured target adjusts the position of the face to be within the iris image acquisition range of the iris image acquisition system.
3. An iris image collecting method as claimed in claim 1, wherein if the iris camera is a zoom camera, the iris image of the target to be measured is collected by using the preferred iris camera, and before the iris image collecting method, further comprising:
acquiring a distance value between the detected target detected by the position detection device and the position detection device when the detected target is positioned in a preset detection area;
and according to the distance value, adjusting the focal length of the preferred iris camera so that the human face is positioned in the focal length of the preferred iris camera.
4. An iris image acquisition terminal, comprising a processor and a memory, wherein the processor is configured to execute a program corresponding to the iris image acquisition method according to any one of claims 1 to 3 stored in the memory, so as to implement the following steps:
acquiring the height value of the human eye when the detected target detected by the position detection device is positioned in a preset detection area;
adjusting the irradiation angle of the near-infrared light source according to the height value of the human eye, so that the human eye is in the irradiation range of the near-infrared light source;
selecting an iris camera with a height value matched with the height value of the human eyes from the plurality of iris cameras longitudinally arranged as a preferred iris camera according to the height value of the human eyes;
and acquiring an iris image of the measured target by adopting the preferred iris camera.
5. An iris image acquisition terminal according to claim 4, wherein, before obtaining the human eye height value when the detected target detected by said position detecting device is located in the preset detection area, further comprising:
acquiring a distance value between the detected target detected by the position detection device and the position detection device when the detected target is positioned in a preset detection area;
and sending an adjusting command to the measured target according to the distance value, so that the measured target adjusts the position of the face to be within the iris image acquisition range of the iris image acquisition system.
6. An iris image collecting terminal as claimed in claim 4, wherein if the iris camera is a zoom camera, the iris image collecting method further comprises the following steps:
acquiring a distance value between the detected target detected by the position detection device and the position detection device when the detected target is positioned in a preset detection area;
and according to the distance value, adjusting the focal length of the preferred iris camera so that the human face is positioned in the focal length of the preferred iris camera.
7. An iris image acquisition system, comprising: an iris image collecting terminal, a position detecting device, a near infrared light source with adjustable illumination angle and a plurality of iris cameras which are longitudinally arranged according to any one of claims 4 to 6;
the position detection device comprises a face detection device which is configured to detect a human eye height value of a detected target.
8. An iris image capturing system as claimed in claim 7, wherein the position detecting means further includes a laser range finder;
the laser range finder is configured to detect a distance value between a target under test and the laser range finder.
9. An iris image collecting system according to claim 7, wherein said face detecting means comprises a face camera and a face recognizing means;
the face camera is configured to acquire an image of a detected target;
the face recognition device is configured to recognize a face of the detected target according to the image of the detected target, and an eye height value is obtained according to the face.
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| WO2024093308A1 (en) * | 2022-10-31 | 2024-05-10 | Hongquan SHEN | Biometric system for xr head-mounted display |
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| CN204087228U (en) * | 2014-08-11 | 2015-01-07 | 北京天诚盛业科技有限公司 | The harvester of iris image |
| US20160110601A1 (en) * | 2014-10-15 | 2016-04-21 | Samsung Electronics Co., Ltd. | User terminal apparatus and iris recognition method thereof |
| CN107341467A (en) * | 2017-06-30 | 2017-11-10 | 广东欧珀移动通信有限公司 | Method for collecting iris and equipment, electronic installation and computer-readable recording medium |
| CN107451533A (en) * | 2017-07-07 | 2017-12-08 | 广东欧珀移动通信有限公司 | Control method, control device, electronic installation and computer-readable recording medium |
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| US20220139110A1 (en) * | 2019-02-18 | 2022-05-05 | Nec Corporation | Image pick-up apparatus, method, system, and computer readable medium |
| US11935328B2 (en) * | 2019-02-18 | 2024-03-19 | Nec Corporation | Image pick-up apparatus, method, system, and computer readable medium |
| WO2024093308A1 (en) * | 2022-10-31 | 2024-05-10 | Hongquan SHEN | Biometric system for xr head-mounted display |
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