CN109643379A - Fingerprint identification method, device and electronic equipment - Google Patents

Fingerprint identification method, device and electronic equipment Download PDF

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Publication number
CN109643379A
CN109643379A CN201880002304.8A CN201880002304A CN109643379A CN 109643379 A CN109643379 A CN 109643379A CN 201880002304 A CN201880002304 A CN 201880002304A CN 109643379 A CN109643379 A CN 109643379A
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CN
China
Prior art keywords
fingerprint
image
predetermined pattern
optical signal
pattern
Prior art date
Application number
CN201880002304.8A
Other languages
Chinese (zh)
Inventor
蒋鹏
Original Assignee
深圳市汇顶科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市汇顶科技股份有限公司 filed Critical 深圳市汇顶科技股份有限公司
Priority to PCT/CN2018/116234 priority Critical patent/WO2020102945A1/en
Publication of CN109643379A publication Critical patent/CN109643379A/en

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Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K9/00Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
    • G06K9/00006Acquiring or recognising fingerprints or palmprints
    • G06K9/00087Matching; Classification
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K9/00Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
    • G06K9/00006Acquiring or recognising fingerprints or palmprints
    • G06K9/00013Image acquisition
    • G06K9/0004Image acquisition by using electro-optical elements or layers, e.g. electroluminescent sensing
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K9/00Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
    • G06K9/00006Acquiring or recognising fingerprints or palmprints
    • G06K9/00013Image acquisition
    • G06K9/00046Image acquisition by using geometrical optics, e.g. using prisms

Abstract

The embodiment of the present application discloses a kind of fingerprint identification method, device and electronic equipment, is able to ascend the safety of fingerprint recognition.This method comprises: at least one predetermined pattern on the fingerprint detection region of object to be identified pressing display screen, acquire at least one fingerprint image of the object to be identified, wherein, each fingerprint image corresponds to a predetermined pattern, and the intensity of the corresponding optical signal in first area in the predetermined pattern is greater than the intensity of the corresponding optical signal of second area in the predetermined pattern;According at least one described fingerprint image, determine first object image and/or the second target image, wherein, the first object image includes optical signal imaging of the corresponding optical signal of at least one predetermined pattern in the body surface reflection to be identified, and second target image includes optical signal imaging of the corresponding optical signal of at least one predetermined pattern in the interior of articles scattering to be identified;According to the first object image and/or second target image, determine whether the object to be identified is real finger.

Description

Fingerprint identification method, device and electronic equipment

Technical field

This application involves fingerprint identification technology fields, and more particularly, to a kind of fingerprint identification method, device and electricity Sub- equipment.

Background technique

The application of optical fingerprint identification device brings safe and convenient and fast user experience to user, but forges fingerprint example The fingerprint mold such as manufactured by artificial material (for example, silica gel, white glue), is a security risk in fingerprint application, passes through The fingerprint image high with actual fingerprint similarity can be obtained by forging fingerprint.Therefore, how optical fingerprint identification device is identified The fingerprint of acquisition it is true and false, be a urgent problem needed to be solved to promote the safety of fingerprint recognition.

Summary of the invention

The embodiment of the present application provides a kind of fingerprint identification method, device and electronic equipment, can effectively identify true and false Fingerprint promotes the safety of fingerprint recognition.

In a first aspect, providing a kind of fingerprint identification method, comprising: in the fingerprint detection of object to be identified pressing display screen When at least one predetermined pattern successively shown on region, at least one fingerprint image of the object to be identified is acquired, wherein Each fingerprint image corresponds to a predetermined pattern, and the intensity of the corresponding optical signal in first area in the predetermined pattern is greater than institute State the intensity of the corresponding optical signal of second area in predetermined pattern;According at least one described fingerprint image, the first mesh is determined Logo image and/or the second target image, wherein the first object image includes the corresponding light of at least one described predetermined pattern For signal in the optical signal imaging of the body surface to be identified reflection, second target image is that described at least one is pre- The corresponding optical signal of pattern is determined in the optical signal imaging of the interior of articles scattering to be identified;According to the first object figure Picture and/or second target image, determine whether the object to be identified is real finger.

In some possible implementations, at least one described predetermined pattern includes multiple predetermined patterns, it is described to When at least one predetermined pattern successively shown on the fingerprint detection region of identification object pressing display screen, acquire described to be identified At least one fingerprint image of object, comprising: successively show the multiple predetermined figure in the fingerprint detection region of the display screen Each predetermined pattern in case;Based on each predetermined pattern, a corresponding fingerprint image is acquired.

In some possible implementations, the multiple predetermined pattern is obtained by same pattern phase shift, and the multiple The superposition pattern of predetermined pattern is the pattern of solid color.

In some possible implementations, the multiple predetermined pattern includes the first predetermined pattern and the second predetermined figure Case, the fingerprint detection region in the display screen successively show each predetermined pattern in the multiple predetermined pattern, packet Include: the optical signal in the region where the fingerprint ridge pattern in target fingerprint image is only opened in control, to show that described first is predetermined Pattern;Or the optical signal in the region where the fingerprint valley pattern in the target fingerprint image is only opened in control, described in being formed Second predetermined pattern;Wherein, the target fingerprint image is the fingerprint image of the predetermined pattern acquisition based on solid color.

In some possible implementations, the multiple predetermined pattern is multiple candy strips or multiple chessboard trrellis diagrams Case.

In some possible implementations, described at least one fingerprint image according to determines first object image And/or second target image, comprising: according to the corresponding multiple fingerprint images of the multiple stripe pattern and the multiple item The phase relation of print image determines the first object image and/or the second target image.

In some possible implementations, described at least one fingerprint image according to determines first object image And/or second target image, comprising:

Extract finger print information and the half-light region in the light region of each fingerprint image in the multiple fingerprint image Finger print information, wherein the light region of each fingerprint image is the firstth area of the corresponding predetermined pattern of the fingerprint image The imaging region of the optical signal of domain reflection, the half-light region of each fingerprint image are that each fingerprint image is corresponding pre- Determine the imaging region of the optical signal of the second area reflection of pattern;Believed according to the fingerprint in the light region of each fingerprint image The finger print information of breath and half-light region, determines the first object image and/or second target image, wherein the finger The finger print information in the light region of print image include the corresponding optical signal of the corresponding predetermined pattern of the fingerprint image it is described to Identify finger print information and the corresponding light of the corresponding predetermined pattern of the fingerprint image entrained by the optical signal of body surface reflection Signal finger print information entrained by the optical signal of the interior of articles scattering to be identified.

It is described according to the first object image and/or second target image in some possible implementations, Determine whether the object to be identified is real finger, comprising: according to the first object image and/or the second target figure Picture and reference fingerprint image determine the first ratio and/or the second ratio, wherein the reference fingerprint image corresponds to single face The predetermined pattern of color;According to first ratio and/or second ratio, determine whether the object to be identified is true hand Refer to.

It is described according to the first object image and/or second target image in some possible implementations, And reference fingerprint image, determine the first ratio and/or the second ratio, comprising: determine each of described reference fingerprint image First average value of the sampled value of pixel;The second of the sampled value of all pixels point in the first object image is averaged The ratio of value and first average value is determined as first ratio;And/or by all pictures in second target image The ratio of the third average value of the sampled value of vegetarian refreshments and first average value is determined as second ratio.

It is described according to first ratio and/or second ratio in some possible implementations, determine described in Whether object to be identified is real finger, comprising: if first ratio is in the first preset range and/or second ratio In the second preset range, determine that the object to be identified is real finger.

In some possible implementations, at least one predetermined pattern optical signal launched by light source is in the finger Line detection zone is formed, wherein the light source includes at least one of red light source, green light source and blue-light source.

In some possible implementations, the light source be the display screen the fingerprint detection region part from Luminescence display unit, and the red light source, the green light source and the blue-light source are respectively the red of the display screen Display unit, green display unit and blue display unit.

In some possible implementations, the method also includes: the described of the fingerprint detection region is opened in control Spontaneous light display unit in first area closes the spontaneous light display unit in the second area, described at least with formation Each predetermined pattern in one predetermined pattern.

In some possible implementations, the wavelength of the corresponding optical signal of the pattern in the first area be for The central wavelength of the optical fingerprint sensor of fingerprint collecting.

Second aspect provides a kind of fingerprint identification device, comprising: optical fingerprint sensor, in object to be identified When pressing at least one predetermined pattern successively shown on the fingerprint detection region of display screen, the object to be identified is acquired extremely A few fingerprint image, the corresponding predetermined pattern of each fingerprint image, wherein the first area in the predetermined pattern is corresponding Optical signal intensity be greater than the predetermined pattern in the corresponding optical signal of second area intensity;Wherein, described at least one A fingerprint image is for determining first object image and/or the second target image, the first object image and/or described second Target image for determining whether the object to be identified is real finger, the first object image include it is described at least one Optical signal imaging of the corresponding optical signal of predetermined pattern in the body surface reflection to be identified, second target image The optical signal imaging scattered including the corresponding optical signal of at least one described predetermined pattern in the interior of articles to be identified.

In some possible implementations, at least one described predetermined pattern includes multiple predetermined patterns, the optics Fingerprint sensor is specifically used for: successively showing each of the multiple predetermined pattern in the fingerprint detection region of the display screen When predetermined pattern, it is based on each predetermined pattern, acquires a corresponding fingerprint image.

In some possible implementations, the multiple predetermined pattern is obtained by same pattern phase shift, and the multiple The superposition pattern of predetermined pattern is the pattern of solid color.

Multiple predetermined patterns described in some possible implementations include the first predetermined pattern and the second predetermined pattern, First area in first predetermined pattern is the region where the fingerprint ridge pattern in target fingerprint image, and described first is pre- The second area in pattern is determined for the region where the fingerprint valley pattern in the target fingerprint image, second predetermined pattern In first area be region where fingerprint valley pattern in target fingerprint image, the secondth area in second predetermined pattern Domain is the region where the fingerprint ridge pattern in the target fingerprint image, wherein the target fingerprint image is based on single The fingerprint image of the predetermined pattern acquisition of color.

In some possible implementations, the multiple predetermined pattern is multiple candy strips or multiple chessboard trrellis diagrams Case.

In some possible implementations, the fingerprint identification device further include: processor, for according to the multiple Phase relation between the corresponding multiple fingerprint images of stripe pattern and the multiple stripe pattern, determines first mesh Logo image and/or the second target image.

In some possible implementations, the processor is also used to: extracting each of the multiple fingerprint image The finger print information in the light region of fingerprint image and the finger print information in half-light region, wherein the light of each fingerprint image Region is the imaging region for the optical signal that the first area of the corresponding predetermined pattern of the fingerprint image is reflected, each fingerprint The half-light region of image is the imaging area of the optical signal of the second area reflection of the corresponding predetermined pattern of each fingerprint image Domain;

According to the finger print information of the finger print information in the light region of each fingerprint image and half-light region, determine described in First object image and/or second target image, wherein the finger print information in the light region of the fingerprint image includes institute The corresponding optical signal of the corresponding predetermined pattern of fingerprint image is stated entrained by the optical signal of the body surface to be identified reflection The light that finger print information and the corresponding optical signal of the corresponding predetermined pattern of the fingerprint image are scattered in the interior of articles to be identified Finger print information entrained by signal.

In some possible implementations, the processor is also used to: according to the first object image and/or described Second target image and reference fingerprint image determine the first ratio and/or the second ratio, wherein the reference fingerprint image The predetermined pattern of corresponding solid color;According to first ratio and/or second ratio, determine that the object to be identified is No is real finger.

In some possible implementations, the processor is also used to: determining each of described reference fingerprint image First average value of the sampled value of pixel;The second of the sampled value of all pixels point in the first object image is averaged The ratio of value and first average value is determined as first ratio;And/or by all pictures in second target image The ratio of the third average value of the sampled value of vegetarian refreshments and first average value is determined as second ratio.

In some possible implementations, the processor is also used to: if first ratio is in the first preset range Interior and/or described second ratio determines that the object to be identified is real finger in the second preset range.

In some possible implementations, the wavelength of the corresponding optical signal of the pattern in the first area be for The central wavelength of the optical fingerprint sensor of fingerprint collecting.

In some possible implementations, at least one predetermined pattern optical signal launched by light source is in the finger Line detection zone is formed, wherein the light source includes at least one of red light source, green light source and blue-light source.

In some possible implementations, the light source be the display screen the fingerprint detection region part from Luminescence display unit, and the red light source, the green light source and the blue-light source are respectively the red of the display screen Display unit, green display unit and blue display unit.

In some possible implementations, described device further include: light source driver module opens the finger for controlling Spontaneous light display unit in the first area of line detection zone, the self-luminous display closed in the second area are single Member, to form each predetermined pattern.

The third aspect provides a kind of electronic equipment, any possible realization side including second aspect or second aspect Fingerprint identification device in formula.

Therefore, in the embodiment of the present application, which can adopt according to the predetermined pattern with light and shade difference Collect corresponding fingerprint image, may further be determined according to the fingerprint image optical signal that is reflected from body surface to be identified and from The optical signal imaging of interior of articles scattering, so as to according to the characteristic of this two parts optical signal, determine the object to be identified Whether body is real finger, and then is able to ascend the safety of fingerprint recognition.

Detailed description of the invention

Fig. 1 is the floor map for the electronic equipment that the application can be applicable in.

Fig. 2 is partial cutaway schematic view of the electronic equipment shown in FIG. 1 along A-A '.

Fig. 3 is the schematic diagram of the fingerprint identification device of the embodiment of the present application.

Fig. 4 is the schematic diagram of several predetermined patterns of the embodiment of the present application.

Fig. 5 is the schematic flow chart of the fingerprint identification method of the embodiment of the present application.

Fig. 6 is the schematic diagram based on three width sine streak pattern fingerprint images collected.

Fig. 7 is the schematic block diagram of the electronic equipment of the embodiment of the present application.

Specific embodiment

Below in conjunction with attached drawing, technical solutions in the embodiments of the present application is described.

It should be understood that the technical solution of the embodiment of the present application can be applied to various electronic equipments, such as smart phone, notes The portable or mobiles such as this computer, tablet computer, game station calculate equipment and electronic databank, automobile, bank's automatic cabinet Other electronic equipments such as member's machine (Automated Teller Machine, ATM), but the embodiment of the present application does not limit this.

As a kind of common application scenarios, optical fingerprint systems provided by the embodiments of the present application can be applied in intelligent hand Machine, tablet computer and other with the mobile terminal of display screen or other terminal devices;More specifically, being set in above-mentioned terminal In standby, fingerprint identification device can be specially optical fingerprint identification device, and the regional area below display screen can be set Perhaps whole region is to form (Under-display or Under-screen) optical fingerprint systems under screen.

It should also be understood that the technical solution of the embodiment of the present application other than it can carry out fingerprint recognition, can also carry out other Fingerprint recognition based on optical imaging concept, for example, recognition of face etc., the embodiment of the present application does not limit this.

Figures 1 and 2 show that a kind of electronic equipment 100 that the fingerprint identification device of the embodiment of the present application can be applicable in is shown It is intended to, wherein Fig. 1 is the front schematic view of electronic equipment 100, and Fig. 2 is that electronic equipment 100 shown in FIG. 1 is cutd open along the part of A-A ' Face structural schematic diagram.

As shown in Figure 1 and shown in Fig. 2, which includes display screen 120 and optical fingerprint identification device (back Also referred to as fingerprint identification device) 130, wherein the optical fingerprint identification device 130 has one or more induction arrays, The induction arrays are arranged at the regional area of 120 lower section of display screen, so that optical finger print identification dress The fingerprint collecting region (or induction region) 103 for setting 130 is at least partially disposed at the display area 102 of the display screen 120.

It should be appreciated that the area in the fingerprint detection region 103 can be with the induction of the optical fingerprint identification device 130 The area of array is different, such as example, by the light path design, reflective folding light path design or other light of lens imaging The light path designs such as convergence or reflection, can make the area in the fingerprint detection region 103 of the optical fingerprint identification device 130 Greater than the area of 130 induction arrays of optical fingerprint identification device.In other substitution implementations, if using such as light Line collimating fashion carry out optical path guidance, the fingerprint detection region 103 of the optical fingerprint identification device 130 can also be designed to The area of the induction arrays of the optical fingerprint identification device 130 is consistent.

As shown in Figure 1, the fingerprint detection region 103 is located among the display area 102 of the display screen 120, therefore, User is when needing to be unlocked the electronic equipment or other fingerprint authentications, it is only necessary to press finger in place In the fingerprint detection region 103 of the display screen 120, it can realize that fingerprint inputs.Since fingerprint detection can be in screen in fact It is existing, therefore fingerprint key (such as Home is arranged without the special reserved space in its front for electronic equipment 100 using the above structure Key), so as to which using screen scheme comprehensively, i.e., the display area 102 of the described display screen 120 can extend substantially to entire electronics The front of equipment 100.

In as one embodiment, the display screen 120 can be self light emitting display panel, use spontaneous light display unit As display pixel, for example, Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display screen or Micro-led (Micro-LED) display screen.For using OLED display screen, the optical fingerprint identification device 130 It can use OLED display unit (i.e. OLED light source) work that the OLED display screen 120 is located at the fingerprint identification region 103 For the excitation light source of optical finger print detection.

In other embodiments, the optical fingerprint identification device 130 can also use built-in light source or external light source To provide the optical signal for carrying out fingerprint detection.In this case, the optical fingerprint identification device 130 can be adapted for Non-spontaneous smooth display screen, such as liquid crystal display (Liquid Crystal Display, LCD) or other passive shine show Display screen.For applying in the liquid crystal display with backlight module and liquid crystal display panel, refer under the screen to support liquid crystal display Line detection, the optical fingerprint systems of the electronic equipment 100 can also include the excitation light source for optical finger print detection, described Excitation light source can be specially the light source of infrared light supply or specific wavelength non-visible light, can be set in the liquid crystal display Below the backlight module of screen or the fringe region that is arranged in below the cover sheet of the electronic equipment 100, and the optics Fingerprint identification device 130 can be set below the fringe region of liquid crystal display panel or cover sheet and guided by optical path so that Fingerprint detection light can reach the optical fingerprint identification device 130;Alternatively, the optical fingerprint identification device 130 can also be with It is arranged below the backlight module, and the backlight module is by carrying out aperture to film layers such as diffusion sheet, blast piece, reflector plates Or other optical designs are identified with allowing fingerprint detection light to pass through liquid crystal display panel and backlight module and reaching the optical finger print Device 130.

Also, the induction arrays of the optical fingerprint identification device 130 are specially optical detector (Photo detector) Array comprising multiple optical detectors in array distribution, the optical detector can be used as optical sensor as described above Unit.When finger touch, press or close to (for ease of description, the application is referred to as touching) in the fingerprint identification region When 103, the light that the display unit of the fingerprint identification region 103 issues occurs to reflect and formed anti-in the fingerprint of finger surface Light is penetrated, wherein the reflected light of the wrinkle ridge of the finger print and line paddy is different, reflected light is from the display screen 120 and by institute It states photodetector array and is received and converted to corresponding electric signal, i.e. fingerprint detection signal.Based on the fingerprint detection signal Fingerprint image data can be obtained, and can be verified with further progress fingerprint matching, thus real in the electronic equipment 100 Existing optical finger print identification function.

It should be understood that the electronic equipment 100 further includes transparency protected cover board 110, the lid in specific implementation Plate 110 can be specially transparent cover plate, such as glass cover-plate or sapphire cover board, be located at the top of the display screen 120 And cover the front of the electronic equipment 100.Therefore, in the embodiment of the present application, so-called finger is touched, presses or is approached The display screen 120 actually refer to finger touch, pressing or close to above the display screen 120 cover board 110 or Cover the protective layer of the cover board 110.In addition, the electronic equipment 100 can also include touch sensor, the touch Sensor can be specially touch panel, can be set on 120 surface of display screen, can also partially or wholly integrate To inside the display screen 120, i.e., the described display screen 120 is specially touching display screen.

As a kind of optional implementation, as shown in Fig. 2, the optical fingerprint identification device 130 includes optical detection Unit 134 and optical module 132, the optical detection unit 134 are electric including the induction arrays and with the induction arrays Property connection reading circuit and other auxiliary circuits, a chip (Die) can be produced on by semiconductor technology;That is institute Optical imagery chip or image sensor chip (back also referred to as optical finger print biography can be produced on by stating optical detection unit 134 Sensor or optical fingerprint sensor chip).The induction in the optical detection unit 134 can be set in the optical module 132 The top of array, can specifically include optical filter (or filter plate, optical filter (Filter)), optical path guide structure with And other optical elements, the optical filter can be used for filtering out the environment light for penetrating finger, and the optical path guide structure is main It will be reflected from finger surface for the optical paths guidance such as the light propagated downwards being collimated, being modulated or being converged with realizing Reflected light be directed to the induction arrays and carry out optical detection.

In specific implementation, the optical module 132 can be encapsulated in the same optics with the optical detection unit 134 The chip exterior where the optical detection unit 134 can also be arranged in the optical module 132 by fingerprint chip, such as The optical module 132 is fitted in above the chip, or the subelement of the optical module 132 is integrated in above-mentioned Among chip.Wherein, there are many implementations for the optical path guide structure of the optical module 132, for example can be specially half The optical path modulation device or beam path alignment device that conductor silicon wafer or other substrates are made, with multiple light path modulation units Perhaps the collimation unit light path modulation unit or collimation unit can be specially microwell array.Alternatively, the optical waveguide layer It can be optical lens (Lens) layer, there is one or more lens units, such as one or more non-spherical lens compositions Lens group (hereinafter also referred to as lens group).From the reflected reflected light of finger through the microwell array or the lens list It after member carries out beam path alignment or convergence, and is received by optical sensor unit below, accordingly, the induction arrays can be with Detect the fingerprint image of finger.

The lower section of the optical fingerprint identification device 130 is also provided with circuit board 140, such as flexible circuit board (Flexible Printed Circuit, FPC), the optical fingerprint identification device 130 can for example be arrived by pad solder The circuit board 140, and realized and other of other peripheral circuits or the electronic equipment 100 by the circuit board 140 The electrical interconnection and signal transmission of element.For example, the optical fingerprint identification device 130 can be connect by the circuit board 140 The control signal of the processing unit of the electronic equipment 100 is received, and can also be examined the fingerprint by the circuit board 140 Signal is surveyed to export to the processing unit of the electronic equipment 100 or control unit etc..

Conventional fingerprint identifies that specific identification process can be with are as follows: using the visible light of certain wavelength as the light for irradiating fingerprint Source, specifically, the light source can irradiate fingerprint detection region on a display screen, to form pure color in the fingerprint detection region Hot spot, such as green spot, i.e. all display pixels in fingerprint detection region are all lighted.When finger touch, pressing or When close to (for ease of description, referred to collectively herein as press) fingerprint detection region, the optical signal of light source transmitting passes through and finger The reflection of the finger of line detection zone contact, forms the optical signal comprising finger print information, and optical sensor receives the reflection light, Fingerprint recognition is carried out using the catoptric imaging principle of light.

Usually, artificial material production fingerprint mold, such as milky rubber, transparent rubber, black rubber or The fingerprint mold of the materials such as yellowish pink rubber preparation has apparent difference with the structure and material of real finger.Specifically, fingerprint Mold generallys use the technique production of reverse mould, therefore the structure and material of its surface and inside are all every homotypes and uniform, And the structure of real finger is made of different layers, including the structures such as epidermis, skin corium, corporality tissue and phalanges.Optical signal shines It penetrates on true and false finger, is further imaged in optical finger print mould group, then the received optical signal of optical finger print mould group mainly includes Two parts, first part are the optical signals reflected from finger surface, and second part is the optical signal scattered from finger interior, by In the structure of true and false finger and the difference of material, therefore, this two parts optical signal has apparent difference.Based on this, the application Embodiment proposes a kind of fingerprinting scheme, by forming ninsolid color hot spot in fingerprint detection region, that is, has light and shade difference Hot spot, be based on the ninsolid color hot spot, acquire fingerprint image, be based further on the fingerprint image and obtain and reflected from finger surface Optical signal and from finger interior scatter optical signal determine true and false fingerprint so as to the difference based on this two parts of signals.

Below in conjunction with Fig. 3 and Fig. 4, the fingerprint identification device of the embodiment of the present application is discussed in detail.

Fig. 3 shows the schematic diagram of the fingerprint identification device of the embodiment of the present application.As shown in figure 3, the fingerprint identification device 300 include: optical fingerprint sensor 320, for successively showing on the fingerprint detection region of object to be identified pressing display screen At least one predetermined pattern when, acquire at least one fingerprint image of the object to be identified, wherein each fingerprint image pair A predetermined pattern is answered, the intensity of the corresponding optical signal in first area 312 in the predetermined pattern is greater than the predetermined pattern In the corresponding optical signal of second area 313 intensity.

That is, the first area 312 in the predetermined pattern is light region, the second area in the predetermined pattern 313 be half-light region, i.e., the predetermined pattern is the pattern with light and shade difference.

It should be noted that if at least one pattern includes multiple predetermined patterns, the light region of each predetermined pattern It is different with half-light region, it is assumed that multiple predetermined pattern includes the first predetermined pattern and the second predetermined pattern, a kind of possible In the case of, the half-light region of corresponding second predetermined pattern in the light region of first predetermined pattern.

Optionally, in the embodiment of the present application, which can also include:

Optical module 330, for guiding or converging to the optical fingerprint sensor 320 for fingerprint detection signal, wherein The fingerprint detection signal is the optical signal corresponding to the predetermined pattern of the fingerprint detection region of display screen formation in object to be identified The optical signal of body surface reflection and scattering-in.

It should be understood that the optical module 330 can correspond to the optical module 132 in embodiment shown in FIG. 1, specific implementation The associated description of previous embodiment can be referred to, which is not described herein again.

It should also be understood that the fingerprint identification device 300 can be fingerprint recognition mould group in the embodiment of the present application, correspond to Fig. 1 In optical fingerprint identification device 130, alternatively, the fingerprint identification device 300 or including fingerprint recognition mould group electronics Equipment, the embodiment of the present application are not construed as limiting this.

Optionally, in the embodiment of the present application, at least one predetermined pattern optical signal launched by light source is described Fingerprint detection region is formed, wherein the light source includes at least one of red light source, green light source and blue-light source.

Optionally, as one embodiment, the light source be the display screen the fingerprint detection region part from Luminescence display unit 311, then the red light source, the green light source and the blue-light source are respectively the red of the display screen Color display unit, green display unit and blue display unit.

Optionally, in other embodiments, which may be the built-in light source or external light of fingerprint recognition mould group Source, the embodiment of the present application are not construed as limiting this.

In the concrete realization, it can control the strong of the optical signal that light region of the light source into the predetermined pattern is emitted Degree is greater than the intensity of the optical signal emitted to half-light region, to form each predetermined pattern.

For example, at least one predetermined pattern includes the first predetermined pattern, the first area of first predetermined pattern is bright The second area of light region and first pattern is half-light region, then shows that this is first pre- in the fingerprint detection region of the display screen The fingerprint detection area can be closed to open the spontaneous light display unit in the first area in the fingerprint detection region by determining pattern The spontaneous light display unit in second area in domain, to form first predetermined pattern.

Optionally, in the embodiment of the present application, which may include multiple predetermined patterns, multiple Predetermined pattern can be the pattern of light and shade complementation, that is to say, that the superposition pattern of multiple pattern can be the figure of solid color Case, i.e. pure color hot spot, for example, white hot spot, cyan hot spot or green spot etc..

Optionally, in the embodiment of the present application, multiple predetermined pattern can be obtained by same pattern phase shift, for example, should Multiple predetermined patterns include first pattern and the second pattern, which is the pattern with light and shade difference, second pattern Can be pattern that obtain the first pattern phase shift π or multiple also may include more patterns, for example, the first figure Case, the second pattern and third pattern, second pattern and third pattern, which can be, distinguishes 2 π/3 of phase shift and 4 π/3 by the first pattern It obtains, as long as the superposition pattern for enabling to multiple predetermined pattern is pure color hot spot, the embodiment of the present application is for this The phase intervals of multiple predetermined patterns are not especially limited.

Hereinafter, illustrating the possible implementation of predetermined pattern in conjunction with Fig. 4.

For example, as shown in figure 4, multiple predetermined pattern can be multiple candy strips with light and shade interval, the striped The period at the light and shade interval in pattern can be one or more pixels, and it is, for example, possible to use n pixel is bright, m pixel is dark Candy strip obtains multiple candy strips by phase shift, the phase difference for example, 3 candy strips, between every two candy strip For 2 π/3.

In another example multiple predetermined pattern may be the chessboard grid pattern at light and shade interval, it is bright in the chessboard grid pattern Inner room every period can be one or more pixels, it is, for example, possible to use n pixel is bright, the dark chessboard trrellis diagram of m pixel Case obtains multiple chessboard grid patterns by phase shift, the phase difference for example, 3 chessboard grid patterns, between every two chessboard grid pattern For 2 π/3.

Optionally, the n and m can be the same or different, and the embodiment of the present application is not construed as limiting this, for example, n and m can Think any integer in 5~10.

It should be understood that multiple predetermined pattern in the embodiment of the present application may be other regular patterns, such as shown in Fig. 4 Annulus pattern, or may be irregular pattern, the superposition pattern of only multiple predetermined pattern is pure color hot spot, The embodiment of the present application is not construed as limiting this.

In the embodiment of the present application, when object to be identified presses the fingerprint detection region of the display screen, the display screen When fingerprint detection region can successively show at least one predetermined pattern, which can successively be acquired For at least one fingerprint image of at least one predetermined pattern, since predetermined pattern is the hot spot with light and shade difference, then The fingerprint image of acquisition is also the image with light and shade difference.For the light region of fingerprint pattern, generally include above Two parts optical signal imaging, and for the half-light region of fingerprint pattern, usually only include second part light Signal imaging.Therefore, at least one fingerprint image with light and shade difference of acquisition is handled, can determines this Two parts optical signal distinguishes imaging, is denoted as first object image and the second target image, it is possible to further according to this One target image and the second target image, determine true and false fingerprint.

It should be noted that in the embodiment of the present application, which can be understood as in predetermined pattern being pure When coloured light spot, the optical signal imaging that the corresponding optical signal of the predetermined pattern is reflected in body surface to be identified, second mesh Logo image can be understood as when predetermined pattern is pure color hot spot, and the corresponding optical signal of the predetermined pattern is in interior of articles to be identified The optical signal imaging of scattering.

Since for different materials, the first object image and the second target image have apparent difference, example Such as, for fingerprint mold, the difference of the first object image and the second target image is smaller for real finger, Therefore, in an optional embodiment, the difference of the first object image and the second target image can be compared, determines true and false finger Line, for example, false fingerprint can be determined as when the difference of the first object image and the second target image is less than specific threshold, When the difference of the first object image and the second target image is greater than specific threshold, it is determined as actual fingerprint.

In other alternative-embodiments, the fingerprint image of a large amount of real finger can be trained, is obtained true The corresponding first object iconic model of finger and the second Model of target image, the fingerprint image to subsequent object to be identified into When the true and false identification of row, the first object image of object to be identified and the first object iconic model can be compared, and/or Second target image of object to be identified and second Model of target image are compared, first object image and this first Under Model of target image matching and/or the second target image and the second Model of target image match condition, it is determined as really referring to Otherwise line is determined as false fingerprint.

It should be understood that first object image and the matching of first object iconic model may include first object image and the first mesh The difference of the value of corresponding pixel points in logo image model is less than specific threshold or the first object image and first object figure As the accounting that the difference of the value of the corresponding pixel points in model is less than the number of the pixel of specific threshold is greater than special ratios, example Such as 95%.Similar judgment mode also can be used for the second target image and the matching of the second Model of target image, here not It repeats again.

Optionally, in some embodiments, which can also include:

Processor, for according to the corresponding multiple fingerprint images of the multiple predetermined pattern and the multiple predetermined figure Phase relation between case determines the first object image and/or the second target image, further according to the first object figure Picture and/or the second target image determine whether the object to be identified is real finger.

By above description it is found that multiple predetermined pattern can be is obtained by same pattern phase shift, then by multiple predetermined Multiple fingerprint images that pattern obtains also have corresponding phase relation, therefore, two according to included by each fingerprint image Spectroscopic signal also has corresponding phase relation, therefore, according to multiple fingerprint image combine the phase relation, it is available this The corresponding picture signal of two parts optical signal, specific implementation process are explained in detail in conjunction with specific embodiments in embodiment of the method It states, which is not described herein again.

It should be understood that the processor can be the processor of electronic equipment, for example, master control (Host) module is also possible to fingerprint Identify the processor in mould group, for example, micro-control unit (Micro Control Unit, MCU), the embodiment of the present application to this simultaneously It does not limit.

Optionally, in some specific embodiments, which is specifically used for:

According to the first object image and second target image and reference fingerprint image, the first ratio and second are determined Whether ratio is real finger according to determining first ratio and the second ratio-dependent object to be identified.

Optionally, in the embodiment of the present application, which is the fingerprint image acquired based on pure color hot spot, tool Body can show pure color hot spot in fingerprint detection region, acquire fingerprint image based on the pure color hot spot, which can be with As the reference fingerprint image;Alternatively, since the superposition pattern of multiple predetermined pattern in the embodiment of the present application is pure color light Spot, the reference fingerprint image may be the superimposed image of the corresponding multiple fingerprint images of multiple predetermined pattern.Optionally, make For one embodiment, which can determine that the first of the sampled value of each pixel in the reference fingerprint image is averaged Value determines the ratio of the second average value of the sampled value of pixel all in the first object image and first average value For first ratio, by the ratio of the third average value of the sampled value of pixel all in second target and first average value Value is determined as second ratio.Further judge whether first ratio falls into the first preset range, whether which falls Enter the second preset range, to determine whether the object to be identified is real finger.For example, the processor can exist in the first ratio In first preset range, and when the second ratio is in the second preset range, determine that the object under test is real finger, otherwise, really The fixed object under test is prosthetic finger.Alternatively, the processor can be in first ratio in the first preset range or the second ratio When in the second preset range, determine that the object under test is real finger.

Table 1 is the first ratio determined by the fingerprint mold of two kinds of artificial material production and the fingerprint image of real finger Ld_ Nomal, the second ratio LgThe ratio L of _ Nomal and the second ratio and the first ratiog_Normal/Ld_NormalContrast table.

Table 1

Fingerprint image Ld_Nomal Lg_Nomal Lg_Normal/Ld_Normal The fingerprint image of real finger 0.551 -0.332 -0.602 Milky white rubber vacation fingerprint image 0.462 -0.170 -0.369 Transparent rubber vacation fingerprint image 0.419 -0.092 -0.219

By above description it is found that since artificial material has the characteristic of the uniform isotropic of material, so from artificial material The reflection of fingerprint die surface optical signal and the optical signal scattered from fingerprint mould inside difference it is smaller, and real finger packet Include the different structure of multilayer, thus from finger surface reflect optical signal and from finger interior scatter optical signal difference compared with Greatly, this point is also proved from table 1, that is, the L of real fingerd_ Nomal and LgThe difference of _ Nomal is greater than artificial material system The L of standby fingerprint moldd_ Nomal and LgThe difference of _ Nomal therefore can be according to the difference of first ratio and the second ratio Or first ratio and the second ratio the parameters such as ratio, determine true and false fingerprint.

It should be understood that in the embodiment of the present application, pixel or pixel unit in fingerprint detection region etc. can refer to display screen Spontaneous light display unit or light emitting pixel, the pixel in fingerprint image can correspond to the induction list in optical fingerprint sensor Member, the sampled value of the pixel in fingerprint image are the big of the sensing unit optical signal collected in the optical fingerprint sensor It is small.

Optionally, in other alternative embodiments, which can also refer to according to the first object image with the reference Print image determines the first scaled image, specifically, can be by the respective pixel in the first object image and reference fingerprint image The ratio of the sampled value of point is determined as the sampled values of the corresponding pixel points in first scaled image, then first can compare this The average value of the sampled value of all pixels point in example diagram picture is determined as the first ratio;It similarly, can also be according to second mesh Logo image and the reference fingerprint image determine the second scaled image, may further be by the respective pixel in second scaled image The average value of the sampled value of point is as second ratio.

More than, which is determined according to the first object image and the second target image and reference fingerprint image Merely illustrative with the mode of the second ratio, other similar equivalent variations equally fall into the protection scope of the embodiment of the present application, this Application embodiment is not construed as limiting this.

Optionally, which can also be directly according to first scaled image or the second scaled image, and determining should be wait know Whether other object is real finger, for example, the processor can determine first scaled image and the first scaled image model is Whether no matching or second scaled image and the second scaled image model match, in first scaled image and first ratio In the case that example diagram is as Model Matching or second scaled image and the second scaled image Model Matching, the object to be identified is determined For real finger, otherwise, it determines the object to be identified is prosthetic finger.

Here, the method for determination of the first scaled image model and the second scaled image model can be with reference in previous embodiment The method of determination of first object iconic model and the second Model of target image, for sake of simplicity, which is not described herein again.

It optionally, in the embodiment of the present application, can be according to corresponding first mesh of fingerprint image of a large amount of real finger The sampled value and reference fingerprint image of all pixels point of logo image determine first preset range, or can also be according to aforementioned First object iconic model and the reference fingerprint image determine first preset range, for example, can be by the first object figure As the range where the ratio of the value of the corresponding pixel points in model and the reference fingerprint image is determined as the first default model It encloses, or can also be by the average value of the sampled value of each pixel in the first object iconic model and the first average value Range where ratio is determined as first preset range.Second preset range can be determined by a similar method, in order to Succinctly, which is not described herein again.

Above in association with Fig. 3 to Fig. 4, the Installation practice of the application is described in detail, below in conjunction with Fig. 5 and Fig. 6, retouches in detail State the present processes embodiment, it should be appreciated that embodiment of the method is corresponded to each other with Installation practice, and similar description is referred to Installation practice.

Fig. 5 shows the schematic flow chart of the fingerprint identification method of the embodiment of the present application.Fingerprint recognition side shown in fig. 5 Method can be executed by the fingerprint identification device in previous embodiment.

As shown in figure 5, the fingerprint identification method 500 may include steps of:

S510, at least one predetermined pattern successively shown on the fingerprint detection region of object to be identified pressing display screen When, acquire at least one fingerprint image of the object to be identified, wherein the corresponding predetermined pattern of each fingerprint image, this is pre- The intensity of the corresponding optical signal in first area in pattern is determined greater than the corresponding optical signal of second area in the predetermined pattern Intensity.

S520 determines first object image and/or the second target image according at least one fingerprint image, wherein should First object image includes the optical signal that the corresponding optical signal of at least one predetermined pattern is reflected in the body surface to be identified Imaging, second target image include that the corresponding optical signal of at least one predetermined pattern is dissipated in the interior of articles to be identified The optical signal imaging penetrated.

S530 determines whether the object to be identified is true according to the first object image and/or second target image Finger.

Optionally, in some embodiments, which includes multiple predetermined patterns, described to be identified When object presses at least one predetermined pattern on the fingerprint detection region of display screen, at least one of the object to be identified is acquired Fingerprint image, comprising:

Each predetermined pattern in multiple predetermined pattern is successively shown in the fingerprint detection region of the display screen, and being based on should Each predetermined pattern acquires a corresponding fingerprint image.

Optionally, in some embodiments, multiple predetermined pattern is obtained by same pattern phase shift, and multiple predetermined figure The superposition pattern of case is the pattern of solid color.

Optionally, in some embodiments, multiple predetermined pattern includes the first predetermined pattern and the second predetermined pattern, institute State each predetermined pattern successively shown in the multiple predetermined pattern in the fingerprint detection region of the display screen, comprising:

The optical signal in the region where the fingerprint ridge pattern in target fingerprint image is only opened in control, to show described first Predetermined pattern;Or

The optical signal in the region where the fingerprint valley pattern in the target fingerprint image is only opened in control, described in being formed Second predetermined pattern;

Wherein, the target fingerprint image is the fingerprint image of the predetermined pattern acquisition based on solid color.

Optionally, multiple predetermined pattern is multiple candy strips or multiple chessboard grid patterns.

Optionally, in some embodiments, described at least one fingerprint image according to, determines first object image And/or second target image, comprising:

According to the phase relation of the corresponding multiple fingerprint images of multiple stripe pattern and multiple stripe pattern, really The fixed first object image and/or the second target image.

Optionally, in some embodiments, described according at least one fingerprint image, determine first object image and/ Or second target image, comprising:

Extract finger print information and the half-light region in the light region of each fingerprint image in the multiple fingerprint image Finger print information, wherein the light region of each fingerprint image is the firstth area of the corresponding predetermined pattern of the fingerprint image The imaging region of the optical signal of domain reflection, the half-light region of each fingerprint image are that each fingerprint image is corresponding pre- Determine the imaging region of the optical signal of the second area reflection of pattern;

According to the finger print information of the finger print information in the light region of each fingerprint image and half-light region, determine described in First object image and/or second target image, wherein the finger print information in the light region of the fingerprint image includes institute The corresponding optical signal of the corresponding predetermined pattern of fingerprint image is stated entrained by the optical signal of the body surface to be identified reflection The light that finger print information and the corresponding optical signal of the corresponding predetermined pattern of the fingerprint image are scattered in the interior of articles to be identified Finger print information entrained by signal.

Optionally, described according to the first object image and/or second target image, whether determine the object to be identified It is real finger, comprising:

According to the first object image and/or second target image and reference fingerprint image, the first ratio is determined And/or second ratio, wherein the reference fingerprint image corresponds to the predetermined pattern of solid color;

According to first ratio and/or second ratio, determine whether the object to be identified is real finger.

Optionally, described according to the first object image and/or second target image and reference fingerprint image, really Fixed first ratio and/or the second ratio, comprising:

Determine the first average value of the sampled value of each pixel in the reference fingerprint image;

By the ratio of the second average value of the sampled value of all pixels point in the first object image and first average value Value is determined as first ratio;And/or by the third average value of the sampled value of all pixels point in second target image with The ratio of first average value is determined as second ratio.

Optionally, described according to first ratio and/or second ratio, determine whether the object to be identified is true hand Refer to, comprising:

If first ratio is in the first preset range and/or second ratio is in the second preset range, determining should be to Identification object is real finger.

Optionally, which forms in the fingerprint detection region, wherein The light source includes at least one of red light source, green light source and blue-light source.

Optionally, part spontaneous light display unit of the light source for the display screen in the fingerprint detection region, and the red Light source, the green light source and the blue-light source are respectively that the red display unit, green display unit and blue of the display screen are aobvious Show unit.

Optionally, in some embodiments, this method 500 can also include:

The spontaneous light display unit in the first area in the fingerprint detection region is opened in control, is closed in the second area Spontaneous light display unit, to form each predetermined pattern.

Optionally, the wavelength of the corresponding optical signal of the pattern in the first area is the optical finger print for fingerprint collecting The central wavelength of sensor.

Preferably, the wavelength of the corresponding optical signal of pattern can be most quick for optical fingerprint sensor imaging in the first area The central wavelength of sense, such as green light, but the embodiment of the present application to this and is not construed as limiting.

Hereinafter, in conjunction with specific embodiments, the fingerprint identification method according to the embodiment of the present application is described in detail.

Embodiment 1: multiple predetermined pattern is three sine streak patterns, and phase intervals are 2 π/3.

Wherein, which respectively corresponds the first optical signal, the second optical signal and third optical signal.

Optionally, in the concrete realization, sin (k can be used1x+k2Sin (y)) function, generating has the three of light and shade interval A sine streak pattern, wherein the k1And k2It can be used for controlling the interval in the light and shade region in the sine streak pattern.

It is alternatively possible to which the wavelength that the corresponding optical signal in region that striped is lighted is arranged is the center of optical fingerprint sensor Wavelength, such as the wavelength of green band, to promote fingerprint recognition performance.

Further, three sine streak patterns are successively shown in the fingerprint detection region, is based on each sine streak Pattern acquires a fingerprint image, obtains three fingerprint image L1, L2And L3, as shown in Figure 6.

According to the function for generating three sine streak patterns, available fingerprint image L1, L2And L3Expression formula such as Shown in formula (1)-formula (3):

L1=Ld·(0.5+0.5·sin(φ))+Lg/2 (1)

L2=Ld·(0.5+0.5·sin(φ+2π/3))+Lg/2 (2)

L3=Ld·(0.5+0.5·sin(φ+4π/3))+Lg/2 (3)

Wherein, LdFor the first object image, the LgFor second target image.

It is appreciated that the LdObject to be identified is irradiated respectively including first optical signal, the second optical signal and third optical signal When body, entrained the sum of the finger print information from the optical signal that the body surface to be identified reflects, alternatively, it is also assumed that the Ld It is to be identified from this when irradiating the object to be identified for the superposition optical signal of the first optical signal, the second optical signal and third optical signal The optical signal imaging of body surface reflection.

Similarly, the LgObject to be identified is irradiated respectively including first optical signal, the second optical signal and third optical signal When, entrained the sum of the finger print information from the optical signal that the body surface to be identified reflects, alternatively, it is also assumed that the LgFor When the superposition optical signal of first optical signal, the second optical signal and third optical signal irradiates the object to be identified, from the object to be identified The optical signal imaging of body scattering-in.

From formula (1)-formula (3) as can be seen that there is fixed phase difference between collected fingerprint image, this is fixed Phase difference can correspond to the phase intervals between three sine streak patterns.The three width fingerprint pattern is superimposed available list The image of one color, in some embodiments, the fingerprint image of the solid color can be used as the reference in previous embodiment and refer to Print image.

It should be understood that in formula (1)-formula (3), LgCoefficient can be according to the number of the pixel shared by bright fringes and dark The number of pixel shared by striped determines that if the pixel period of bright fringes and dark fringe is all 8 pixels, i.e. 8 pixels are bright, 8 A pixel is gone out, the L in the case of thisgFor the L in the case of all pixels all lightg1/2, alternatively, if the pixel period of bright fringes be 8 The pixel period of a pixel, dark fringe is 4 pixels, i.e. 8 pixels are bright, and 4 pixels are gone out, the L in the case of thisgFor all pixels L in the case of all lightg2/3, and so on, the embodiment of the present application is only by taking bright fringes is identical with the pixel period of dark fringe as an example It is illustrated, the L in formula (1)-formula (3) need to be only adjusted in the case of othergCoefficient, for sake of simplicity, here no longer It repeats.

It is possible to further obtain first object image L according to formula (1)-formula (3)dWith the second target image Lg, such as Shown in following formula:

Lg=2L1-Ld·(1+sin(φ)) (5)

Wherein, cos (φ)=(2L2-2L3)/Ld,

It then can be according to the first object image L determineddWith the second target image Lg, determine that the object to be identified is No is fingerprint finger, and specific implementation can be with reference to the associated description in previous embodiment.

Embodiment 2: multiple predetermined pattern is three chessboard grid patterns, and phase intervals are 2 π/3.

As described above, which can be bright for n pixel, and the dark chessboard grid pattern of m pixel, the n and m can It can also be different with identical, for example, the n can be 6~12, which may be 6~12.With n=8, for m=8, i.e. light The pixel period in region is 8, and the pixel fingerprint in half-light region is also 8.

In the embodiment 2, it can extract based on the light region in each chessboard grid pattern fingerprint image collected Finger print information and half-light region finger print information.

Wherein, the finger print information in the light region of the fingerprint image includes that the corresponding predetermined pattern of the fingerprint image is corresponding Finger print information predetermined pattern corresponding with the fingerprint image entrained by the optical signal that optical signal is reflected in body surface to be identified Corresponding optical signal finger print information entrained by the optical signal of interior of articles scattering to be identified.

That is, the finger print information L in the light region extractedmaxWith the finger print information L in half-light regionminAnd first object figure As LdWith the second target image LgWith following relationship:

Lmax=Ld+Lg/2 (6)

Lg=2Lmin (7)

It is similar to Example 1, the LgCoefficient can the pixel according to shared by light region number and half-light region The number of shared pixel determines that the formula (6) and formula (7) are all to be in the pixel period in light region and half-light region It is determined in the case where 8, therefore coefficient is 1/2, can be adjusted accordingly coefficient in the case of other, which is not described herein again.

It is possible to further solve first object image L according to formula (6) and formula (7)dWith the second target image Lg, into And according to first object image LdWith second target image LgDetermine whether the object to be identified is real finger, it is specific real It now can be with reference to the associated description in previous embodiment.In the embodiment 2, one can be determined based on each fingerprint image First object image and second target image, it can multiple first object images and multiple second target images are extracted, In the concrete realization, multiple first object image of extraction can be overlapped, obtains for true and false fingerprint recognition Multiple second target images are overlapped by one target image, obtain the second target image for true and false fingerprint recognition.

It should be understood that based on each fingerprint image in the chessboard grid pattern fingerprint image collected in embodiment 2 Extract the finger print information L in light regionmaxWith the finger print information L in half-light regionmin, so as to combine formula (6) and formula (7) a first object image L is solveddWith a second target image Lg, i.e. fingerprint image of the embodiment of the present application in acquisition For single light and shade difference fingerprint image when can also carry out the differentiation of true and false fingerprint.

Embodiment 3: multiple predetermined pattern include the first predetermined pattern and the second predetermined pattern, first predetermined pattern and Second predetermined pattern is complementary pattern, wherein first predetermined pattern is that fingerprint ridge pattern is bright, the figure that fingerprint valley pattern goes out Case, second predetermined pattern go out for fingerprint ridge pattern, the bright pattern of fingerprint valley pattern.

Specifically, it is primarily based on pure color hot spot and obtains fingerprint image, specifically, the institute in fingerprint detection region is opened in control Some pixels are shown pure color hot spot in fingerprint detection region, the fingerprint image of object to be identified are acquired based on the pure color hot spot; Then, the fingerprint image is shown in the fingerprint detection region, wherein in the fingerprint ridge image region in the fingerprint image Pixel open, the pixel in fingerprint valley image region in the fingerprint image is closed, and shows first predetermined pattern, base The first fingerprint image is acquired in first predetermined pattern, then in the fingerprint ridge image region controlled in the fingerprint image Pixel close, the pixel in fingerprint valley image region in the fingerprint image is opened, and shows second predetermined pattern, base The second fingerprint image is acquired in second predetermined pattern, it may further be true according to first fingerprint image and the second fingerprint image Determine first object image and the second target image, specific implementation can be no longer superfluous here with the associated description in reference implementation example 2 It states.

It optionally, in the embodiment of the present application, can also be in optical fingerprint sensor before carrying out fingerprint collecting The sampled value of each pixel is calibrated, to reduce the error of subsequent fingerprint collecting.

Specifically, block piece can be set in the top of fingerprint identification device, for example, the block piece of black rubber material, To prevent external environmental light from interfering to fingerprint image acquisition.

Then optical signal of the light source to fingerprint detection field emission varying strength is controlled, for example, 100%, 70%, 40%, Based on the optical signal of these types of varying strength, multiple fingerprint images are acquired, further according to multiple fingerprint image, to the optics The sampled value of each photosensitive unit in fingerprint sensor is calibrated (such as KB calibration), obtains the calibration of each photosensitive unit It is worth (such as K and B), the sampled value which can be used for the correspondence photosensitive unit in the fingerprint image to subsequent acquisition carries out Calibration, to reduce the hardware differences bring measurement error of optical fingerprint sensor.

The embodiment of the present application also provides a kind of electronic equipment 800, as shown in fig. 7, the electronic equipment 800 may include Display screen 820 and above-mentioned fingerprint identification device 810, the fingerprint identification device 810 can be known for the fingerprint in previous embodiment Other device 300, and the lower section of the display screen 820 is set.Wherein, as a kind of optional embodiment, the display screen 820 have spontaneous light display unit, and the spontaneous light display unit can be used as the fingerprint identification device 810 for being referred to The excitation light source of line detection.In addition, the fingerprint identification device 810 can be used in executing in embodiment of the method shown in Fig. 5 Content.

It should be understood that the specific example in the embodiment of the present application is intended merely to that those skilled in the art is helped to more fully understand The embodiment of the present application, rather than limit the range of the embodiment of the present application.

It should be understood that the term used in the embodiment of the present application and the appended claims is only merely for the specific reality of description The purpose for applying example, is not intended to be limiting the embodiment of the present application.For example, being made in the embodiment of the present application and the appended claims The "an" of singular, " above-mentioned " and "the" are also intended to including most forms, unless context clearly shows that other Meaning.

Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure Member can be realized with electronic hardware, computer software, or a combination of the two, can in order to clearly demonstrate hardware and software Interchangeability generally describes each exemplary composition and step according to function in the above description.These functions are actually It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed Scope of the present application.

In several embodiments provided herein, it should be understood that disclosed system, device can pass through it Its mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only Only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be tied Another system is closed or is desirably integrated into, or some features can be ignored or not executed.In addition, shown or discussed phase Mutually between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication of device or unit Connection is also possible to electricity, mechanical or other form connections.

The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple In network unit.Some or all of unit therein can be selected to realize the embodiment of the present application scheme according to the actual needs Purpose.

It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit It is that each unit physically exists alone, is also possible to two or more units and is integrated in one unit.It is above-mentioned integrated Unit both can take the form of hardware realization, can also realize in the form of software functional units.

If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product When, it can store in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words It embodies, which is stored in a storage medium, including some instructions are used so that a computer Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the application Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey The medium of sequence code.

The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any Those familiar with the art within the technical scope of the present application, can readily occur in various equivalent modifications or replace It changes, these modifications or substitutions should all cover within the scope of protection of this application.Therefore, the protection scope of the application should be with right It is required that protection scope subject to.

Claims (29)

1. a kind of fingerprint identification method characterized by comprising
In at least one predetermined pattern successively shown on the fingerprint detection region of object to be identified pressing display screen, institute is acquired State at least one fingerprint image of object to be identified, wherein the corresponding predetermined pattern of each fingerprint image, the predetermined pattern In the corresponding optical signal in first area intensity be greater than the predetermined pattern in the corresponding optical signal of second area intensity;
According at least one described fingerprint image, first object image and/or the second target image are determined, wherein described first Target image includes optical signal of the corresponding optical signal of at least one predetermined pattern in the body surface reflection to be identified Imaging, second target image are the corresponding optical signal of at least one predetermined pattern in the object to be identified The optical signal imaging of portion's scattering;
According to the first object image and/or second target image, determine whether the object to be identified is true hand Refer to.
2. the method according to claim 1, wherein at least one described predetermined pattern includes multiple predetermined figures Case, it is described at least one predetermined pattern successively shown on the fingerprint detection region of object to be identified pressing display screen, it adopts Collect at least one fingerprint image of the object to be identified, comprising:
Each predetermined pattern in the multiple predetermined pattern is successively shown in the fingerprint detection region of the display screen;
Based on each predetermined pattern, a corresponding fingerprint image is acquired.
3. according to the method described in claim 2, it is characterized in that, the multiple predetermined pattern is obtained by same pattern phase shift, And the superposition pattern of the multiple predetermined pattern is the pattern of solid color.
4. according to the method described in claim 3, it is characterized in that, the multiple predetermined pattern is multiple candy strips or multiple Chessboard grid pattern.
5. according to the method in claim 2 or 3, which is characterized in that the multiple predetermined pattern includes the first predetermined pattern With the second predetermined pattern, the fingerprint detection region in the display screen successively shows each of the multiple predetermined pattern Predetermined pattern, comprising:
The optical signal in the region where the fingerprint ridge pattern in target fingerprint image is only opened in control, to show that described first is predetermined Pattern;Or
The optical signal in the region where the fingerprint valley pattern in the target fingerprint image is only opened in control, to form described second Predetermined pattern;
Wherein, the target fingerprint image is the fingerprint image of the predetermined pattern acquisition based on solid color.
6. method according to any one of claim 3 to 5, which is characterized in that described at least one fingerprint according to Image determines first object image and/or the second target image, comprising:
According to the phase relation of the corresponding multiple fingerprint images of the multiple stripe pattern and the multiple stripe pattern, really The fixed first object image and/or the second target image.
7. method according to any one of claim 3 to 5, which is characterized in that described at least one fingerprint according to Image determines first object image and/or the second target image, comprising:
Extract the finger print information in the light region of each fingerprint image in the multiple fingerprint image and the fingerprint in half-light region Information, wherein the light region of each fingerprint image is that the first area of the corresponding predetermined pattern of the fingerprint image is anti- The imaging region for the optical signal penetrated, the half-light region of each fingerprint image are the corresponding predetermined figure of each fingerprint image The imaging region of the optical signal of the second area reflection of case;According to the finger print information in the light region of each fingerprint image and The finger print information in half-light region determines the first object image and/or second target image, wherein the fingerprint image The finger print information in the light region of picture includes the corresponding optical signal of the corresponding predetermined pattern of the fingerprint image described to be identified Finger print information and the corresponding optical signal of the corresponding predetermined pattern of the fingerprint image entrained by the optical signal of body surface reflection The finger print information entrained by the optical signal of the interior of articles scattering to be identified.
8. method according to any one of claim 1 to 7, which is characterized in that described according to the first object image And/or second target image, determine whether the object to be identified is real finger, comprising:
According to the first object image and/or second target image and reference fingerprint image, the first ratio is determined And/or second ratio, wherein the reference fingerprint image corresponds to the predetermined pattern of solid color;
According to first ratio and/or second ratio, determine whether the object to be identified is real finger.
9. according to the method described in claim 8, it is characterized in that, described according to the first object image and/or described Two target images and reference fingerprint image determine the first ratio and/or the second ratio, comprising:
Determine the first average value of the sampled value of each pixel in the reference fingerprint image;
By the ratio of the second average value of the sampled value of all pixels point in the first object image and first average value Value is determined as first ratio;And/or the third of the sampled value of all pixels point in second target image is averaged The ratio of value and first average value is determined as second ratio.
10. according to the method described in claim 9, it is characterized in that, it is described according to first ratio and/or it is described second ratio Example, determines whether the object to be identified is real finger, comprising:
If first ratio is in the first preset range and/or second ratio is in the second preset range, described in determination Object to be identified is real finger.
11. method according to any one of claim 1 to 10, which is characterized in that at least one described predetermined pattern by The optical signal of light source transmitting is formed in the fingerprint detection region, wherein the light source includes red light source, green light source and indigo plant At least one of color light source.
12. according to the method for claim 11, which is characterized in that the light source is the display screen in the fingerprint detection The part spontaneous light display unit in region, and the red light source, the green light source and the blue-light source are respectively described The red display unit of display screen, green display unit and blue display unit.
13. according to the method for claim 12, which is characterized in that the method also includes:
The spontaneous light display unit in the first area in the fingerprint detection region is opened in control, closes the second area In spontaneous light display unit, with each predetermined pattern formed at least one described predetermined pattern.
14. method according to any one of claim 1 to 13, which is characterized in that pattern in the first area The wavelength of corresponding optical signal is the central wavelength of the optical fingerprint sensor for fingerprint collecting.
15. a kind of fingerprint identification device characterized by comprising
Optical fingerprint sensor, at least one for successively being shown on the fingerprint detection region of object to be identified pressing display screen When a predetermined pattern, at least one fingerprint image of the object to be identified, corresponding one predetermined figure of each fingerprint image are acquired Case, wherein the intensity of the corresponding optical signal in first area in the predetermined pattern is greater than the secondth area in the predetermined pattern The intensity of the corresponding optical signal in domain;
Wherein, at least one described fingerprint image is for determining first object image and/or the second target image, first mesh Logo image and/or second target image are for determining whether the object to be identified is real finger, the first object Image include the corresponding optical signal of at least one predetermined pattern the body surface reflection to be identified optical signal institute at Picture, second target image includes the corresponding optical signal of at least one predetermined pattern in the interior of articles to be identified The optical signal imaging of scattering.
16. device according to claim 15, which is characterized in that at least one described predetermined pattern includes multiple predetermined figures Case, the optical fingerprint sensor are specifically used for:
When the fingerprint detection region of the display screen successively shows each predetermined pattern in the multiple predetermined pattern, it is based on Each predetermined pattern acquires a corresponding fingerprint image.
17. device according to claim 16, which is characterized in that the multiple predetermined pattern is obtained by same pattern phase shift It arrives, and the superposition pattern of the multiple predetermined pattern is the pattern of solid color.
18. device according to claim 16 or 17, which is characterized in that the multiple predetermined pattern is multiple candy strips Or multiple chessboard grid patterns.
19. device according to claim 17, which is characterized in that the multiple predetermined pattern include the first predetermined pattern and Second predetermined pattern, the first area in first predetermined pattern are the area where the fingerprint ridge pattern in target fingerprint image Domain, the second area in first predetermined pattern are the region where the fingerprint valley pattern in the target fingerprint image, institute The first area in the second predetermined pattern is stated as the region where the fingerprint valley pattern in target fingerprint image, described second is predetermined Second area in pattern is the region where the fingerprint ridge pattern in the target fingerprint image, wherein the target fingerprint Image is the fingerprint image of the predetermined pattern acquisition based on solid color.
20. device described in any one of 7 to 19 according to claim 1, which is characterized in that the fingerprint identification device also wraps It includes:
Processor, for according to the corresponding multiple fingerprint images of the multiple stripe pattern and the multiple stripe pattern it Between phase relation, determine the first object image and/or the second target image.
21. device according to claim 20, which is characterized in that the processor is also used to:
Extract the finger print information in the light region of each fingerprint image in the multiple fingerprint image and the fingerprint in half-light region Information, wherein the light region of each fingerprint image is that the first area of the corresponding predetermined pattern of the fingerprint image is anti- The imaging region for the optical signal penetrated, the half-light region of each fingerprint image are the corresponding predetermined figure of each fingerprint image The imaging region of the optical signal of the second area reflection of case;
According to the finger print information of the finger print information in the light region of each fingerprint image and half-light region, described first is determined Target image and/or second target image, wherein the finger print information in the light region of the fingerprint image includes the finger The corresponding optical signal of the corresponding predetermined pattern of print image fingerprint entrained by the optical signal of the body surface reflection to be identified The optical signal that information and the corresponding optical signal of the corresponding predetermined pattern of the fingerprint image are scattered in the interior of articles to be identified Entrained finger print information.
22. device described in any one of 5 to 21 according to claim 1, which is characterized in that the processor is also used to:
According to the first object image and/or second target image and reference fingerprint image, the first ratio is determined And/or second ratio, wherein the reference fingerprint image corresponds to the predetermined pattern of solid color;
According to first ratio and/or second ratio, determine whether the object to be identified is real finger.
23. device according to claim 22, which is characterized in that the processor is also used to:
Determine the first average value of the sampled value of each pixel in the reference fingerprint image;
By the ratio of the second average value of the sampled value of all pixels point in the first object image and first average value Value is determined as first ratio;And/or the third of the sampled value of all pixels point in second target image is averaged The ratio of value and first average value is determined as second ratio.
24. device according to claim 23, which is characterized in that the processor is also used to:
If first ratio is in the first preset range and/or second ratio is in the second preset range, described in determination Object to be identified is real finger.
25. device described in any one of 5 to 24 according to claim 1, which is characterized in that pattern in the first area The wavelength of corresponding optical signal is the central wavelength of the optical fingerprint sensor for fingerprint collecting.
26. device described in any one of 5 to 25 according to claim 1, which is characterized in that at least one described predetermined pattern by The optical signal of light source transmitting is formed in the fingerprint detection region, wherein the light source includes red light source, green light source and indigo plant At least one of color light source.
27. device described in any one of 5 to 26 according to claim 1, which is characterized in that the light source is that the display screen exists The part spontaneous light display unit in the fingerprint detection region, and the red light source, the green light source and the blue light Source is respectively the red display unit, green display unit and blue display unit of the display screen.
28. device described in any one of 5 to 27 according to claim 1, which is characterized in that described device further include:
Light source driver module, it is single for controlling the display of the self-luminous in the first area for opening the fingerprint detection region Member closes the spontaneous light display unit in the second area, to form each predetermined pattern.
29. a kind of electronic equipment characterized by comprising fingerprint recognition described in any one of 5 to 28 according to claim 1 Device.
CN201880002304.8A 2018-11-19 2018-11-19 Fingerprint identification method, device and electronic equipment CN109643379A (en)

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CN105989342A (en) * 2015-02-17 2016-10-05 上海箩箕技术有限公司 Fingerprint identification device and fingerprint identification system
US10121051B2 (en) * 2015-10-16 2018-11-06 Novatek Microelectronics Corp. Optical apparatus and a method for identifying an object
CN206075299U (en) * 2016-07-06 2017-04-05 格林比特(天津)生物信息技术有限公司 A kind of living fingerprint collecting device with pseudo- fingerprint recognition
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