CN110956054B - Iris image acquisition method and terminal - Google Patents
Iris image acquisition method and terminal Download PDFInfo
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- CN110956054B CN110956054B CN201811125825.0A CN201811125825A CN110956054B CN 110956054 B CN110956054 B CN 110956054B CN 201811125825 A CN201811125825 A CN 201811125825A CN 110956054 B CN110956054 B CN 110956054B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/18—Eye characteristics, e.g. of the iris
- G06V40/19—Sensors therefor
Abstract
The embodiment of the invention provides an iris image acquisition method and a terminal, wherein the iris image acquisition is carried out by determining the height value of human eyes and adjusting the irradiation angle of a near infrared light source according to the height value of the human eyes, so that the human eyes are in the irradiation range of the near infrared light source, and an iris camera matched with the height value of the human eyes is selected according to the height value of the human eyes to carry out iris image acquisition.
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 recognition has the advantages of accuracy, stability, safety, uniqueness and non-contact, is a hotspot in the field of biological feature recognition research, and has wide development prospect.
Products with mature iris recognition are commercially applied at present, and have the limitations of recognition distance, recognition height, recognition speed and the like. The iris recognition system in the mainstream in the market has limited effective recognition distance, limits the height of a person, has strict requirements on conditions such as ambient illumination and the like, and has long acquisition time.
In recent years, some research institutions have conducted related research on remote iris recognition technologies, and more mature iris recognition patent products, such as lenses with low pixels and short focal length (for example, CN106557738A, CN107463884 a), have short iris recognition distance, or adopt long focal length lenses (for example, CN 206480000U), have smaller recognition range, are difficult to consider people with various heights, have limited iris image imaging quality and imaging range, are difficult to choose between high resolution and large visual field requirements for remote 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, an embodiment of the invention provides an iris image acquisition method and a terminal.
In view of this, in a first aspect, an embodiment of the present invention provides an iris image acquisition method, applied to an iris image acquisition system, the iris image acquisition system including: a position detection device, a near infrared light source with an adjustable illumination angle, and a plurality of iris cameras arranged longitudinally, the method comprising:
acquiring a human eye height value when the detected target detected by the position detection device is positioned in a preset detection area;
according to the human eye height value, adjusting the irradiation angle of the near infrared light source to enable the human eye to be in the irradiation range of the near infrared light source;
selecting an iris camera with a height value matched with the human eye height value from the plurality of iris cameras which are longitudinally arranged according to the human eye height value as a preferable iris camera;
and acquiring iris images of the detected target by adopting the optimized iris camera.
Optionally, before obtaining the human eye height value when the detected target detected by the position detecting device is located in the preset detection area, the method 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 adjustment command to the measured target according to the distance value, so that the measured target adjusts the position of the human face to be within the iris image acquisition range of the iris image acquisition system.
Optionally, if the iris camera is a zoom camera, the method further includes, before acquiring the iris image of the measured object by using the preferred iris camera:
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 adjusting the focal length of the preferred iris camera according to the distance value, 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 acquisition terminal, including a processor and a memory, where the processor is configured to execute a program corresponding to the iris image acquisition method of the first aspect stored in the memory, so as to implement the following steps:
acquiring a human eye height value when the detected target detected by the position detection device is positioned in a preset detection area;
according to the human eye height value, adjusting the irradiation angle of the near infrared light source to enable the human eye to be in the irradiation range of the near infrared light source;
selecting an iris camera with a height value matched with the human eye height value from the plurality of iris cameras which are longitudinally arranged according to the human eye height value as a preferable iris camera;
and acquiring iris images of the detected target by adopting the optimized iris camera.
Optionally, before obtaining the human eye height value when the detected target detected by the position detecting device is located in the preset detection area, the method 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 adjustment command to the measured target according to the distance value, so that the measured target adjusts the position of the human face to be within the iris image acquisition range of the iris image acquisition system.
Optionally, if the iris camera is a zoom camera, the method further includes, before acquiring the iris image of the measured object by using the preferred iris camera:
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 adjusting the focal length of the preferred iris camera according to the distance value, 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 described in the second aspect;
the position detection device includes a face detection device configured to detect a human eye height value of a detected target.
Optionally, the position detection device further comprises a laser range finder;
the laser rangefinder is configured to detect a distance value between a measured object and the laser rangefinder.
Optionally, the face detection device comprises 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 object according to the image of the detected object, and obtain a human eye height value 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 the 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 are in the irradiation range of the near infrared light source, the iris camera matched with the height value of the human eyes is selected according to the height value of the human eyes to acquire iris images, and the iris image acquisition of people with various heights can be realized by the technical scheme, and the acquisition height range is large.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of an iris image acquisition method according to a first 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
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the 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" for representing elements are used only for facilitating the description of the present invention, and are not of specific significance per se. Thus, "module" and "component" may be used in combination.
Mobile terminals may be implemented in a variety of forms. For example, the terminals described in the present invention may include mobile terminals such as mobile phones, smart phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), navigation devices, and the like, and fixed terminals such as digital TVs, desktop computers, 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 a moving purpose.
Example 1
Referring to fig. 1, fig. 1 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: a position detection device, a near infrared light source with an adjustable illumination angle, and a plurality of iris cameras arranged longitudinally, the method comprising:
acquiring a human eye height value when the detected target detected by the position detection device is positioned in a preset detection area;
according to the human eye height value, adjusting the irradiation angle of the near infrared light source to enable the human eye to be in the irradiation range of the near infrared light source;
selecting an iris camera with a height value matched with the human eye height value from the plurality of iris cameras which are longitudinally arranged according to the human eye height value as a preferable iris camera;
and acquiring iris images of the detected target by adopting the optimized 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, which is applied to an iris image acquisition system, where the iris image acquisition system includes: a position detection device, a near infrared light source with an adjustable illumination angle, and a plurality of iris cameras arranged longitudinally, the method comprising:
acquiring a human eye height value of the detected target detected by the position detection device when the detected target is positioned in a preset detection area and a distance value between the detected target and the position detection device;
according to the distance value, an adjustment command is sent to the measured target, so that the measured target adjusts the position of the human face to be within the iris image acquisition range of the iris image acquisition system;
according to the human eye height value, adjusting the irradiation angle of the near infrared light source to enable the human eye to be in the irradiation range of the near infrared light source;
selecting an iris camera with a height value matched with the human eye height value from the plurality of iris cameras which are longitudinally arranged according to the human eye height value as a preferable iris camera;
and acquiring iris images of the detected target by adopting the optimized 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 device comprises a position detection device, a near infrared light source with an adjustable irradiation angle 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 the detected target detected by the position detection device when the detected target is positioned in a preset detection area and a distance value between the detected target and the position detection device;
according to the human eye height value, adjusting the irradiation angle of the near infrared light source to enable the human eye to be 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 preferable iris camera according to the human eye height value;
according to the distance value, adjusting the focal length of the preferred iris camera so that the face is located in the focal length of the preferred iris camera;
and acquiring iris images of the detected target by adopting the optimized iris camera.
Example IV
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 device comprises a position detection device, a near infrared light source with an adjustable irradiation angle 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 the detected target detected by the position detection device when the detected target is positioned in a preset detection area and a distance value between the detected target and the position detection device;
according to the distance value, an adjustment command is sent to the measured target, so that the measured target adjusts the position of the human face to be within the iris image acquisition range of the iris image acquisition system;
according to the human eye height value, adjusting the irradiation angle of the near infrared light source to enable the human eye to be in the irradiation range of the near infrared light source;
selecting an iris camera with a height value matched with the human eye height value from the plurality of iris cameras which are longitudinally arranged according to the human eye height value as a preferable iris camera;
according to the distance value, adjusting the focal length of the preferred iris camera so that the face is located in the focal length of the preferred iris camera;
and acquiring iris images of the detected target by adopting the optimized 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, including a processor and a memory, where 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 a human eye height value when the detected target detected by the position detection device is positioned in a preset detection area;
according to the human eye height value, adjusting the irradiation angle of the near infrared light source to enable the human eye to be in the irradiation range of the near infrared light source;
selecting an iris camera with a height value matched with the human eye height value from the plurality of iris cameras which are longitudinally arranged according to the human eye height value as a preferable iris camera;
and acquiring iris images of the detected target by adopting the optimized iris camera.
Optionally, before obtaining the human eye height value when the detected target detected by the position detecting device is located in the preset detection area, the method 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 adjustment command to the measured target according to the distance value, so that the measured target adjusts the position of the human face to be within the iris image acquisition range of the iris image acquisition system.
Optionally, if the iris camera is a zoom camera, the method further includes, before acquiring the iris image of the measured object by using the preferred iris camera:
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 adjusting the focal length of the preferred iris camera according to the distance value, 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 system comprises an iris image acquisition terminal, a position detection device, a near infrared light source with an adjustable irradiation angle and a plurality of iris cameras which are longitudinally arranged.
The position detection device includes a face detection device configured to detect a human eye height value of a detected target.
Optionally, the position detection device further comprises a laser range finder;
the laser rangefinder is configured to detect a distance value between a measured object and the laser rangefinder.
The laser range finder is adopted for measuring the distance, the feedback speed is high, and the measurement accuracy is high.
Optionally, the face detection device comprises 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 object according to the image of the detected object, and obtain a human eye height value according to the face.
Optionally, the face camera is a large-field-of-view large-depth short-focus camera;
the large-view-field large-depth-of-field short-focus camera collects images of the detected targets, the face recognition device recognizes faces in the images, and the human eye height value 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 an iris image acquisition method stored in the memory so as to realize the following steps:
acquiring a human eye height value when the detected target detected by the position detection device is positioned in a preset detection area;
according to the human eye height value, adjusting the irradiation angle of the near infrared light source to enable the human eye to be in the irradiation range of the near infrared light source;
selecting an iris camera with a height value matched with the human eye height value from the plurality of iris cameras which are longitudinally arranged according to the human eye height value as a preferable iris camera;
and acquiring iris images of the detected target by adopting the optimized iris camera.
Optionally, before obtaining the human eye height value when the detected target detected by the position detecting device is located in the preset detection area, the method 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 adjustment command to the measured target according to the distance value, so that the measured target adjusts the position of the human face to be within the iris image acquisition range of the iris image acquisition system.
Optionally, if the iris camera is a zoom camera, the method further includes, before acquiring the iris image of the measured object by using the preferred iris camera:
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 adjusting the focal length of the preferred iris camera according to the distance value, 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 a combination thereof. For a hardware implementation, the processing units may be implemented within one or more application specific integrated circuits (ApplicationSpecificIntegratedCircuits, ASIC), digital signal processors (DigitalSignalProcessing, DSP), digital signal processing devices (dspev), programmable logic devices (ProgrammableLogicDevice, PLD), field programmable gate arrays (Field-ProgrammableGateArray, FPGA), 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 that perform 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 solution. 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 will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the apparatus, the apparatus and the units described above may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in 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 solution of the embodiments of the present invention may be embodied in essence or a part contributing to the prior art or a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.
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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
It should be noted that in this document, relational terms such as "first" and "second" and the like are 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.
From the foregoing description of the embodiments, it will be apparent to those skilled in the art that the methods described in the various embodiments of the present invention may be implemented by means of software plus necessary general purpose hardware platforms, or of course by means of hardware, although in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention or the method according to some parts of the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (7)
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: a position detection device, a near infrared light source with an adjustable illumination angle, and a plurality of iris cameras arranged longitudinally, the method comprising:
acquiring a distance value between a detected target detected by the position detection device and the position detection device when the detected target is positioned in a preset detection area;
according to the distance value, an adjustment command is sent to the measured target, so that the measured target adjusts the position of the human face to be within the iris image acquisition range of the iris image acquisition system;
acquiring a human eye height value when the detected target detected by the position detection device is positioned in a preset detection area;
according to the human eye height value, adjusting the irradiation angle of the near infrared light source to enable the human eye to be in the irradiation range of the near infrared light source;
selecting an iris camera with a height value matched with the human eye height value from the plurality of iris cameras which are longitudinally arranged according to the human eye height value as a preferable iris camera;
and acquiring iris images of the detected target by adopting the optimized iris camera.
2. The iris image capturing method according to claim 1, wherein if the iris camera is a zoom camera, capturing an iris image of the object under test using the preferred iris camera, further comprises, before:
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 adjusting the focal length of the preferred iris camera according to the distance value, so that the human face is positioned in the focal length of the preferred iris camera.
3. 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 as claimed in any one of claims 1 to 2 stored in the memory, so as to implement 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;
according to the distance value, an adjustment command is sent to the measured target, so that the measured target adjusts the position of the human face to be within the iris image acquisition range of the iris image acquisition system;
acquiring a human eye height value when the detected target detected by the position detection device is positioned in a preset detection area;
according to the human eye height value, adjusting the irradiation angle of the near infrared light source to enable the human eye to be in the irradiation range of the near infrared light source;
selecting an iris camera with a height value matched with the human eye height value from the plurality of iris cameras which are longitudinally arranged according to the human eye height value as a preferable iris camera;
and acquiring iris images of the detected target by adopting the optimized iris camera.
4. The iris image capturing terminal according to claim 3, wherein if the iris camera is a zoom camera, capturing an iris image of the object under test using the preferred iris camera, further comprises, before:
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 adjusting the focal length of the preferred iris camera according to the distance value, so that the human face is positioned in the focal length of the preferred iris camera.
5. An iris image acquisition system, comprising: the iris image acquisition terminal, the position detection device, the near infrared light source with adjustable illumination angle and the plurality of iris cameras which are longitudinally arranged according to any one of claims 3 to 4;
the position detection device includes a face detection device configured to detect a human eye height value of a detected target.
6. The iris image acquisition system of claim 5, wherein the position detection means further comprises a laser rangefinder;
the laser rangefinder is configured to detect a distance value between a measured object and the laser rangefinder.
7. The iris image capturing system according to claim 5, wherein the face detection means includes a face camera and a face recognition 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 object according to the image of the detected object, and obtain a human eye height value according to the face.
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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 |
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