CN109716353A - Fingerprint identification method, fingerprint identification device and electronic equipment - Google Patents
Fingerprint identification method, fingerprint identification device and electronic equipment Download PDFInfo
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- CN109716353A CN109716353A CN201880003000.3A CN201880003000A CN109716353A CN 109716353 A CN109716353 A CN 109716353A CN 201880003000 A CN201880003000 A CN 201880003000A CN 109716353 A CN109716353 A CN 109716353A
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Abstract
The embodiment of the present application provides a kind of fingerprint identification method, fingerprint identification device and electronic equipment, and it is living body finger print or non-living body fingerprint that fingerprint detected can be distinguished in fingerprint identification process, improves the safety of fingerprint recognition.The fingerprint identification method includes: to be imaged when irradiating fingerprint collecting region respectively according to the light of multiple wavelength from the optical signal that the object of the fingerprint collecting overlying regions reflects, and obtains multiple image；Judge the object for living body finger print or non-living body fingerprint according to the multiple image.
Description
Technical field
The present embodiments relate to information technology fields, and know more particularly, to a kind of fingerprint identification method, fingerprint
Other device and electronic equipment.
Background technique
With the fast development of science and technology, fingerprint identification technology has been widely applied to mobile terminal, smart home etc.
Every field.Currently, using the radiation of visible light biological characteristic of certain wavelength, utilizing the reflection of visible light in fingerprint recognition
Image-forming principle sends the reflected light signal for carrying biological information to sensor and is acquired, according to the information of acquisition with
The biological characteristic of registration in advance storage, which compares, carrys out validation of a user's identity.
But in daily life, people can inevitably leave personal fingerprint under many scenes, other people once obtain
It takes these people's fingerprints and copys, so that it may for unlocking electronic equipment and stealing personal sensitive information, use false fingerprint
Serious property loss is also resulted in when being paid.
Therefore, true and false fingerprint how is distinguished as a urgent problem to be solved.
Summary of the invention
The embodiment of the present application provides a kind of fingerprint identification method, fingerprint identification device and electronic equipment, can distinguish institute
The fingerprint of detection is living body finger print or non-living body fingerprint, improves the safety of fingerprint recognition.
In a first aspect, providing a kind of method of fingerprint recognition, comprising: irradiate fingerprint respectively according to the light of multiple wavelength and adopt
It is imaged when collecting region from the optical signal that the object of the fingerprint collecting overlying regions reflects, obtains multiple image；According to institute
Stating multiple image judges the object for living body finger print or non-living body fingerprint.
In one possible implementation, from institute when the light according to multiple wavelength irradiates fingerprint collecting region respectively
The optical signal for stating the object reflection of fingerprint collecting overlying regions is imaged, comprising: according to the light of the multiple wavelength in difference
It is imaged when moment successively irradiates the fingerprint collecting region from the optical signal that the object reflects.
In one possible implementation, from institute when the light according to multiple wavelength irradiates fingerprint collecting region respectively
The optical signal for stating the object reflection of fingerprint collecting overlying regions is imaged, comprising: according to the light of the multiple wavelength same
It is imaged when multiple subregions that the moment is irradiated respectively in the fingerprint collecting region from the optical signal that the object reflects.
In one possible implementation, the multiple subregion is divided around by the center in the fingerprint collecting region
Cloth.
In one possible implementation, it is described according to the multiple image judge the object for living body finger print still
Non-living body fingerprint, comprising: according to the image data of width image each in the multiple image, calculate the first parameter；According to described
One parameter judges the object for living body finger print or non-living body fingerprint.
In one possible implementation, it is described according to the multiple image judge the object for living body finger print still
Non-living body fingerprint, comprising: image co-registration is carried out to the multiple image, obtains blending image；Judged according to the blending image
The object is living body finger print or non-living body fingerprint.
In one possible implementation, the method also includes: according to the first image in the multiple image into
The matching of row fingerprint image；If successful match and judging the object for living body finger print, it is determined that fingerprint recognition success.
In one possible implementation, the first image is the light according to the default wavelength in the multiple wavelength
The image being imaged when irradiating the object from the optical signal that the object reflects.
In one possible implementation, the light of the multiple wavelength includes at least two in feux rouges, green light and blue light
Kind.
In one possible implementation, the light of the multiple wavelength is in organic light-emitting diode (OLED) display screen OLED
At least partly OLED light source.
Second aspect provides a kind of fingerprint identification device, comprising: optical fingerprint sensor, for according to multiple wavelength
Light be imaged from the optical signal that the object of the fingerprint collecting overlying regions reflects when irradiating fingerprint collecting region respectively, obtain
To multiple image, wherein the multiple image is for judging the object for living body finger print or non-living body fingerprint.
In one possible implementation, the optical fingerprint sensor is specifically used for: according to the multiple wavelength
Light is imaged when different moments successively irradiating the fingerprint collecting region from the optical signal that the object reflects.
In one possible implementation, the optical fingerprint sensor is specifically used for: according to the multiple wavelength
Light when synchronization irradiates multiple subregions in the fingerprint collecting region respectively from the object reflect optical signal into
Row imaging.
In one possible implementation, the multiple subregion is divided around by the center in the fingerprint collecting region
Cloth.
In one possible implementation, the fingerprint identification device further include: processor, for being obtained according to imaging
Multiple image judge the object for living body finger print or non-living body fingerprint.
In one possible implementation, the processor is specifically used for: to the obtained multiple image of imaging into
Row image co-registration, obtains blending image；Judge the object for living body finger print or non-living body fingerprint according to the blending image.
In one possible implementation, the processor is specifically used for: according to width image each in the multiple image
Image data, calculate the first parameter；According to first parameter, judge that the object refers to for living body finger print or non-living body
Line.
In one possible implementation, the processor is also used to: according to the first image in the multiple image
Carry out the matching of fingerprint image；If successful match and judging the object for living body finger print, it is determined that fingerprint recognition success.
In one possible implementation, the first image is the light according to the default wavelength in the multiple wavelength
The image being imaged when irradiating the object from the optical signal that the object reflects.
In one possible implementation, the light of the multiple wavelength includes at least two in feux rouges, green light and blue light
Kind.
In one possible implementation, the light of the multiple wavelength is in organic light-emitting diode (OLED) display screen OLED
At least partly OLED light source.
The third aspect provides the electronic equipment of fingerprint recognition, any possible including second aspect or second aspect
Fingerprint identification device in implementation.
Based on the above-mentioned technical proposal, based on living body finger print and non-living body fingerprint to the absorption of the optical signal of different wave length and anti-
The difference of feedback is handled by the multiple image that the optical signal to different wave length is imaged, and can obtain the color of fingerprint
Information improves fingerprint to tell the non-living body fingerprint that the fingerprint is the living body finger print from human finger or forgery
The safety of identification.
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 (a), Fig. 3 (b) and Fig. 3 (c) are common false fingerprint schematic diagrames.
Fig. 4 is the schematic diagram for the non-living body fingerprint that living body finger print and simulation living body finger print are copied.
Fig. 5 is the schematic diagram of the fingerprint identification device of the embodiment of the present application.
Fig. 6 is the wavelength schematic diagram of the OLED display screen of the embodiment of the present application.
Fig. 7 is the hot spot schematic diagram of the acquisition time mode of the embodiment of the present application.
Fig. 8 is the hot spot schematic diagram of the subregion acquisition mode of the embodiment of the present application.
Fig. 9 is the signal of the fingerprint image of the living body finger print that the method based on the embodiment of the present application obtains and non-living body fingerprint
Figure.
Figure 10 is the schematic flow chart of the fingerprint identification method of the embodiment of the present application.
Figure 11 is the example flow diagram of the fingerprint identification method of the embodiment of the present application.
Specific embodiment
Below in conjunction with attached drawing, technical solution in the embodiment of the present invention 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.
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 collecting 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 collecting 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 collecting 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 collecting 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 collecting 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..
Need to obtain the fingerprint image of finger for traditional fingerprint identification method, in fingerprint identification process, and will
The fingerprint image is matched with the fingerprint in fingerprint base, and unlock operation is executed if successful match.But as long as by special
Material production false finger print layer identical with the fingerprint image of the finger, can crack finger-print cipher easily.Such as Fig. 3 (a) to Fig. 3
(c) shown in, the common method that can be used to make false finger print layer includes three kinds on the market: (a) 2D duplicates class vacation fingerprint: to day
Often life can often leave personal ink paste fingerprint such as contract, receipt, the fingerprint on agreement etc., carry out mirror image duplicating/printing from
And false fingerprint is made, and such vacation fingerprint is easily obtained, and production is simple, and it is low in cost, and images match success rate is high；(b) 2D is mentioned
It takes class vacation fingerprint: in the upper remaining finger print information of mobile phone screen, glass and other items, can be extracted, be swept by professional means
It retouches and printing and making is at false fingerprint, such vacation fingerprint is easily obtained, but manufacture difficulty is high, and images match success rate is low；(c) 3D class
False fingerprint: fingerprint is pressed on moulding grinding tool, is pressed into grinding tool by conductive black glue, white glue, wood glue, silica gel etc. and is generated 3D vacation
Fingerprint, such vacation fingerprint are not easy to obtain, and manufacture difficulty is medium, and low in cost, images match success rate is high, but needs true registration
User cooperates acquisition.
Fig. 4 be using optical fingerprint identification technology collected true and false fingerprint fingerprint image.When object touches, pressing
Or when close to (for ease of description, referred to collectively herein as press) fingerprint collecting region, it is seen that the visible light of light source transmitting
Reflection by the object contacted with fingerprint collecting region forms the optical signal comprising fingerprint feature information, optical finger print sensing
Device receives the reflection light, carries out fingerprint recognition using the catoptric imaging principle of light.
But from fig. 4, it can be seen that in the fingerprint image obtained using common optical fingerprint identification technology, true fingerprint
It is high with the similarity of the fingerprint image of false fingerprint, it is difficult to distinguish.
During carrying out fingerprint recognition, not only need to match fingerprint image, it is also necessary to tell fingerprint image
Picture comes from living body finger print or non-living body fingerprint, and the embodiment of the present application provides a kind of fingerprint recognition based on multi-wavelength detection
Technical solution, to fingerprint image carry out it is matched on the basis of, additionally it is possible to judge the fingerprint image from living body finger print still
Non-living body fingerprint.
In the embodiment of the present application, true fingerprint is also referred to as living body finger print, correspondingly, false fingerprint is also referred to as non-living body and is referred to
Line.
Fig. 5 shows the schematic diagram of the fingerprint identification device of the embodiment of the present application.As shown in figure 5, the fingerprint identification device
500 may include optical fingerprint sensor 510.
From the fingerprint when optical fingerprint sensor 510 is used to irradiate fingerprint collecting region respectively according to the light of multiple wavelength
The optical signal of object reflection above pickup area is imaged, and multiple image is obtained.
Wherein, optical fingerprint sensor 510 be imaged the obtained multiple image for judge the object for living body finger print also
It is non-living body finger print.
Multiple wavelength includes at least two different wave lengths.
In the embodiment, optical fingerprint sensor 510 is imaged according to the optical signal of the different wave length reflected from object,
Due to the difference of the material property of living body finger print and non-living body fingerprint, cause living body finger print and non-living body fingerprint to different wave length
The absorption of optical signal and feedback be not also identical.Based on this species diversity, the multiple image that can be obtained to imaging is handled, with
Information of the fingerprint in color dimension is obtained, so that telling the object is living body finger print or forgery from human finger
Non-living body fingerprint.
The light of multiple wavelength for example may include feux rouges, green light, blue light or be based on RGB (Red Green
Blue, RGB) formed other colors light.It needs to irradiate object, optical finger print sensing using the light of at least two different wave lengths
Device 510 obtains the optical signal of at least two different wave lengths of object reflection, is used to sentence to form at least two width fingerprint images
The severed finger line true and false.At least two different wave length may include red light wavelength, green wavelength, blue light wavelength and other be based on
At least two in the wavelength for the blend color that RGB is formed.
The luminescence unit of self light emitting display panel can provide the light of different-waveband, such as the luminescence unit of OLED display screen can
To provide the light of three kinds of different-wavebands of red, green, blue.When excitation light source of the OLED display screen as fingerprint detection, OLED is shown
The light that screen issues different wave length irradiates the object of fingerprint collecting overlying regions respectively, and the light of the different wave length reflected by the object is believed
Number pass through display screen reach display screen below fingerprint identification device, respectively by the fingerprint identification device optical finger print sense
Device imaging, forms multiple image corresponding with multiple wavelength.For other electronic equipments such as optical finger print door lock, optics
For optical fingerprint systems in the equipment such as fingerprint clocking-in machine, the light filling of other different colours can also be provided.Fig. 6 show one
The Wavelength distribution of kind OLED display screen, wherein the OLED display screen can provide red, three kinds of different-wavebands of green and blue
The light intensity of light, feux rouges therein, green light and blue wave band is as shown in Figure 6.
Certainly, which can also provide the light of different wave length using built-in light source or external light source,
These light sources are just used as the excitation light source of fingerprint detection.At this moment, which can be adapted for non-spontaneous smooth display screen,
Such as liquid crystal display.Here the relative positional relationship to light source and optical fingerprint sensor and without limitation, light source and optics
Fingerprint sensor can be placed side by side below display screen, or places otherwise, as long as can be realized to object
The acquisition of fingerprint image.
The embodiment of the present application provides the acquisition mode of two kinds of fingerprint images, i.e. acquisition time mode and subregion acquisition mode.
Any mode can be used in optical fingerprint sensor 510, according to object reflection multiple wavelength optical signal be imaged with
Obtain multiple image.Both modes are illustrated respectively below with reference to Fig. 7 and Fig. 8.
1 acquisition time mode of mode
In which, which successively irradiates the fingerprint collecting in different moments according to the light of multiple wavelength
It is imaged when region from the optical signal that the object reflects, obtains the multiple image.
By taking Fig. 7 as an example, it is assumed that carry out the acquisition of finger print information using green light, feux rouges and blue light.When triggering fingerprint collecting,
The bias light of some wave band is first got, such as central wavelength is the green light of 525nm.The green light irradiates fingerprint collecting overlying regions
Object, and trigger optical fingerprint identification device acquire the object reflection optical signal obtain piece image.
To after the light signal collection of green light, it is immediately switched to the bias light of another wave band, such as central wavelength is
The feux rouges of 625nm.The object of the red light irradiation fingerprint collecting overlying regions, optical fingerprint identification device acquire object reflection
Optical signal obtains the second width image.
To after the light signal collection of feux rouges, it is immediately switched to the bias light of another wave band, such as central wavelength is
The blue light of 450nm.The object of the blue light illumination fingerprint collecting overlying regions, optical fingerprint identification device acquire object reflection
Optical signal obtains third width image.
It is respectively the different colours that are radiated in fingerprint collecting region in moment T1, moment T2 and moment T3 shown in Fig. 7
Light filling hot spot schematic diagram.At the T1 moment, the light being radiated on fingerprint collecting region is green light；At the T2 moment, it is radiated at finger
Light in line pickup area is feux rouges；At the T3 moment, the light being radiated on fingerprint collecting region is blue light.The light filling of each color
When hot spot is radiated at fingerprint identification region, optical fingerprint sensor according to above fingerprint identification region object reflect optical signal
Obtain a width fingerprint image.It may determine that the object is living body finger print or non-living body fingerprint according to three obtained width images.
2 subregion acquisition mode of mode
In which, which irradiates the fingerprint collecting in synchronization according to the light of multiple wavelength respectively
It is imaged when multiple subregions in region from the optical signal that the object reflects, obtains the multiple image.
Wherein, each image is obtained based on a kind of light of wavelength, and the width image carries in the corresponding subregion of the wavelength
Finger print information.
The positional relationship and size that the embodiment of the present application irradiates the light of different wave length between subregion are not done any
It limits.For example, multiple subregion can be distributed around by the center in the fingerprint collecting region, or can also be according to other
Distribution mode.Wherein, the corresponding subregion of each wavelength can be continuous or be also possible to discrete.
By taking Fig. 8 as an example, it will again be assumed that carry out the acquisition of fingerprint image using green light, feux rouges and blue light.Fingerprint collecting region packet
Three sub-regions corresponding with green light, feux rouges and blue light are included, are denoted as green wavelength, red light region and blue region respectively.
Wherein, green wavelength is one piece of border circular areas of fingerprint collecting regional center, and red light region is one piece of ring for surrounding green wavelength
Shape region, blue region are to surround one piece of annular region of red light region.
When triggering fingerprint recognition, while green light, feux rouges and blue light are got, which irradiates green in fingerprint collecting region
Light region, the red light region in the red light irradiation fingerprint collecting region, the blue region in the blue light illumination fingerprint collecting region.
Optical fingerprint sensor acquires the optical signal of object reflection, and obtains the first width according to the optical signal of the green light of object reflection
Image obtains the second width image according to the optical signal of the feux rouges of object reflection, according to the optical signal of the blue light of object reflection
Obtain third width image.Wherein, piece image carries the finger print information being located in green wavelength, and the carrying of the second width image is located at
Finger print information in red light region, third width image carry the finger print information being located in blue region.According to this obtained three width
Image may determine that the object is living body finger print or non-living body fingerprint.Here it is considered that the color of object under test is uniform.
It should be noted that the light of different wave length can successively irradiate its corresponding sub-district in synchronization or in different moments
Domain.But it should not be overlapped between the subregion that is irradiated of the light of different wave length, such as between three sub-regions shown in Fig. 8
It is not overlapped.
In aforesaid way 1, each image includes the complete fingerprint image in fingerprint collecting region, therefore, except judgement
Outside true and false fingerprint, fingerprint recognition easily can also be carried out using certain width image therein；In above-mentioned mode 2, due to
The light of multiple wavelength is to irradiate corresponding subregion in synchronization, therefore can more efficiently obtain the face of object under test
Color information is used to judge true and false fingerprint.In the concrete realization, suitable mode can be selected to judge true and false fingerprint according to demand.
Optionally, in the application one embodiment, which further includes processor 520, the processor 520
For: judge the object for living body finger print or non-living body fingerprint according to the multiple image that imaging obtains.
The processor can be the processor of electronic equipment, be also possible to the processing for fingerprint recognition being separately provided
Device, the embodiment of the present application do not limit this.
The embodiment of the present application provides two kinds and judges that the object refers to for living body finger print or non-living body according to above-mentioned multiple image
The mode of line, is described separately below.
Mode 1
The processor 520 is specifically used for: carrying out image co-registration to the multiple image that imaging obtains, obtains blending image；
And judge the object for living body finger print or non-living body fingerprint according to the blending image.
For example, processor carries out the blending image obtained after image co-registration to this multiple image, depth can be admitted to
Practise network such as convolutional neural networks, and by the deep learning network judge the object for living body finger print or non-living body fingerprint simultaneously
Export result.
Wherein, which can be obtained by training.For example, acquiring various types of living body finger prints and non-live
Body fingerprint inputs deep learning network as training sample, and by training sample, the result exported according to the deep learning network
Difference between practical desired result, is adjusted the deep learning network, is made by largely training study
The deep learning network can effectively differentiate the true and false of fingerprint image.
Here without limitation to the concrete mode of image co-registration, for example, can using simple combination formula image interfusion method,
The spatial domains fusion method such as logical filters method, can also be using transform domains fusion methods such as high-pass filtering method, Wavelet Transforms.
Such as shown in Fig. 9, left side is the blending image of living body finger print, and right side is the blending image of non-living body fingerprint.It should
Blending image includes the information of color dimension, the fingerprint face of color and finger that wherein the blending image of living body finger print is shown
Color is almost the same, close to yellowish pink.Rather than the color that shows of the blending image of living body finger print is closer to the system of non-living body fingerprint
Make the color of material.The blending image of low resolution colour is sent into the judgement that deep learning network carries out the fingerprint true and false, it can be with
Judging result is exported real-time, quickly.
Mode 2
The processor 520 is specifically used for: according to the image data of width image each in the multiple image, calculating the first parameter；
According to first parameter, judge the object for living body finger print or non-living body fingerprint.
Optionally, whether processor 520 can be located in preset numberical range according to the value of first parameter, to judge
The object is living body finger print or non-living body fingerprint；Alternatively, processor 520 can be according to the value and preset threshold of first parameter
Between size relation, judge the object for living body finger print or non-living body fingerprint.
Wherein, the image data of each image for example can be the corresponding intensity signal for imaging of the width image.
Absorption and reflecting properties due to non-living body fingerprint to the light of different colours, with living body finger print to the light of different colours
Absorption and reflecting properties it is different, therefore, the image data of living body finger print and the corresponding each image of non-living body fingerprint
The value of difference, first parameter obtained according to the image data of multiple image is also different.
As an example it is assumed that carrying out the judgement of the fingerprint true and false using green light and feux rouges.Optical finger print when green light irradiates object
Sensor is imaged to obtain piece image to the optical signal for the green light that the object reflects, and the image data of the width image includes the width figure
As the intensity signal of each pixel (assuming that including N number of pixel), wherein the light intensity of ith pixel point is denoted as Ri.Feux rouges shines
Optical fingerprint sensor is imaged the optical signal for the feux rouges that the object reflects to obtain another piece image when penetrating the object, the width image
Image data include each pixel of width image (assuming that including M pixel) intensity signal, wherein j-th of pixel
Light intensity be denoted as Rj.M=N or M ≠ N.
For example, using subregion acquisition mode, M ≠ N can set first parameter K are as follows:
In another example using acquisition time mode, M=N can set first parameter K are as follows:
Wherein, Base is preset value, such as can be equal to background light intensity.
Wherein, r1For the fusion coefficients of green light, r2For the fusion coefficients of feux rouges.For example, OLED screen issues green with reference to Fig. 6
The ratio between red light intensity that luminous intensity and OLED screen issue about 5:4, then r can be set1=0.45, r2=0.55.
By calculating the value of K, when K is greater than preset threshold value, the object is judged for living body finger print, as first parameter K
When less than the threshold value, judge the object for non-living body fingerprint.
Optionally, in the application one embodiment, which is also used to: according to first in the multiple image
The matching of image progress fingerprint image；If successful match and judging the object for living body finger print, it is determined that fingerprint recognition success.
Wherein, first image for example can the light of default wavelength according in multiple wavelength when irradiating the object from
The image that the optical signal of object reflection is imaged.The default wavelength for example can be finger and be connect in a manner of being most accustomed to
When nearly display screen, wavelength corresponding to the image of best quality, such as the wavelength of green light band can be obtained.
Fingerprint recognition in the embodiment of the present application not only includes the matching to fingerprint image, further includes sentencing to the fingerprint true and false
It is disconnected.The first image in the multiple image that optical fingerprint sensor is imaged can be used to carry out images match.If this
Fingerprint image successful match in one image and fingerprint base shows that first image is the fingerprint image of authorized user, if logical
Crossing preceding method also judges first image for the image of living body finger print, then it is assumed that fingerprint recognition success；If do not had in fingerprint base
Have a fingerprint image with first images match, i.e. the fingerprint image of first image and unauthorized user, or judge this
When one image is the image of non-living body fingerprint, think that fingerprint recognition fails.
For example, the default wavelength can irradiate the object for first in multiple wavelength when using acquisition time mode
The wavelength of the light of body.For example, the light of the default wavelength can irradiate the green light of the object, first figure in Fig. 7 for first time
The image being imaged when the green light irradiates the object as according to from the optical signal that the object reflects.
In another example the light of the default wavelength can be used as corresponding son in multiple wavelength when using subregion acquisition mode
The maximum wavelength of region area.For example, in fig. 8, the light of the default wavelength can be the circle of irradiation fingerprint collecting regional center
The green light of shape large area region, the figure that the optical signal for the green light that the object reflects according to first image is imaged
Picture.At this moment, which is that the most image of finger print information is carried in three width images.
The fingerprint identification device of the embodiment of the present application can first carry out the matching of fingerprint image, and fingerprint image matching at
Judge it for living body finger print or the fingerprint image of non-living body fingerprint when function again；Alternatively, the fingerprint identification device can also first be sentenced
Disconnected object under test is living body finger print or non-living body fingerprint, and when determining the object is living body finger print, then to the living body finger print
Fingerprint image matched.The embodiment of the present application does not limit this.
Figure 10 shows the schematic flow chart of the fingerprint identification method of the application one embodiment.Fingerprint shown in Fig. 10
Recognition methods can be executed by the fingerprint identification device in aforementioned the embodiment of the present application, and associated description can refer to aforementioned implementation
Example, for sake of simplicity, which is not described herein again.
As shown in Figure 10, which may include steps of.
In 1010, from the fingerprint collecting overlying regions when irradiating fingerprint collecting region respectively according to the light of multiple wavelength
The optical signal of object reflection is imaged, and multiple image is obtained.
In 1020, judge the object for living body finger print or non-living body fingerprint according to the multiple image.
Multiple wavelength includes at least two different wave lengths.
Due to the difference of the material property of living body finger print and non-living body fingerprint, cause living body finger print and non-living body fingerprint to not
The absorption of the optical signal of co-wavelength and feedback be not also identical, is based on this species diversity, can to the multiple image that imaging obtains into
Row processing, to obtain information of the fingerprint in color dimension, so that telling the object is the living body finger print from human finger
Or the non-living body fingerprint forged.
When carrying out the acquisition of fingerprint image, acquisition time mode and subregion acquisition mode can be used.
Optionally, when using acquisition time mode, in 1010, fingerprint collecting is irradiated according to the light of multiple wavelength respectively
It is imaged when object on region from the optical signal that the object reflects, comprising: according to the light of multiple wavelength in different moments
It is imaged when successively irradiating the fingerprint collecting region from the optical signal that the object reflects.
Optionally, when using subregion acquisition mode, in 1010, fingerprint collecting is irradiated according to the light of multiple wavelength respectively
It is imaged when object on region from the optical signal that the object reflects, comprising: according to the light of multiple wavelength in synchronization
It is imaged when the multiple subregions irradiated in the fingerprint collecting region respectively from the optical signal that the object reflects.
The positional relationship and size that the embodiment of the present application irradiates the light of different wave length between subregion are not done any
It limits.For example, multiple subregion can be distributed around by the center in the fingerprint collecting region.Preferably, multiple sub-district
Certain sub-regions in domain have suitable area, and the optical signal of the corresponding wavelength from the subregion can carry enough area
Fingerprint image information with simultaneously be used for fingerprint image matching.
Optionally, in 1020, judge the object for living body finger print or non-living body according to the multiple image that imaging obtains
Fingerprint, comprising: according to the image data of width image each in the multiple image, calculate the first parameter；According to first parameter, judgement
The object is living body finger print or non-living body fingerprint.
Wherein, the image data of each image for example can be the corresponding intensity signal for imaging of the width image.
Optionally, in 1020, judge the object for living body finger print or non-living body according to the multiple image that imaging obtains
Fingerprint, comprising: image co-registration is carried out to the multiple image that imaging obtains, obtains blending image；Judged according to the blending image
The object is living body finger print or non-living body fingerprint.
For example, carrying out the blending image obtained after image co-registration to this multiple image, it can be admitted to deep learning network,
And the object is judged for living body finger print or non-living body fingerprint by the deep learning network and exports result.
Optionally, this method further include: the matching of fingerprint image is carried out according to the first image in the multiple image；If
With success and judge the object for living body finger print, it is determined that fingerprint recognition success.
Wherein, first image for example can the light of default wavelength according in multiple wavelength when irradiating the object from
The image that the optical signal of object reflection is imaged.The default wavelength for example can be finger and be connect in a manner of being most accustomed to
When nearly display screen, wavelength corresponding to the image of best quality, such as the wavelength of green light band can be obtained.
The embodiment of the present application does not do any limit to the sequencing of the judgement of the matching and the fingerprint true and false that execute fingerprint image
It is fixed.
Figure 11 shows the example flow diagram of the fingerprint identification method of the application one embodiment.With two wavelength in Figure 11
λ1And λ2For, it can be used to carry out fingerprint recognition according to the selection more than two wavelength of practical application scene in practical application.
In step 1110, object presses fingerprint collecting region.
In step 1120, control light source issues wavelength X1Light, and according to the object reflect optical signal be imaged,
Obtain piece image.
In step 1130, toggle lights issue wavelength X2Light, and according to the object reflect optical signal be imaged,
Obtain the second width image.
In step 1140, piece image is matched.
If the fingerprint image successful match with typing in fingerprint base, thens follow the steps 1150；If it fails to match, fingerprint is known
Do not fail.
In step 1150, according to the image data of piece image and the second width image, the first parameter is calculated.
In step 1160, compare the size relation between the value and threshold value of the first parameter, judge that the object refers to for living body
Line or non-living body fingerprint.
For example, judging the object for living body finger print if the value of the first parameter is greater than the threshold value；If first parameter
Value be less than or equal to the threshold value, then judge the object for non-living body fingerprint.
Further, if judging the object for living body finger print, fingerprint recognition is successful；If judging, the object refers to for non-living body
Line, then fingerprint recognition fails.
Optionally, step 1120 and step 1130 can also be replaced by step 1170.In step 1170, control light source is same
When issue wavelength X1Light and wavelength X2Light.Wherein, wavelength X1Light irradiation fingerprint identification region in the first subregion, it is right
The optical signal of first subregion reflection is imaged to obtain piece image.Wavelength X2Light irradiation fingerprint identification region in second son
Region is imaged to obtain the second width image to the optical signal of the second subregion reflection.
Optionally, step 1150 and step 1160 can also be replaced by step 1180 and step 1190 respectively.Wherein, in step
In rapid 1180, image co-registration is carried out to piece image and the second width image, obtains blending image.In step 1190, by this
Blending image is sent into deep learning network, judges the object for living body finger print or non-living body fingerprint by deep learning network.
It should be understood that the sequence of each step in Figure 11 is not fixation, can also be executed according to other sequences,
And all operationss in possible and non-executing Figure 11.For example, step 1140 can also execute after step 1160.If in step
The object is judged in rapid 1160 for living body finger print, then executes 1140 next to judge whether the living body finger print is authorized user's
Finger print.Alternatively, step 1140 is performed simultaneously with step 1150.
The embodiment of the present application also provides a kind of electronic equipment, which includes that display screen and above-mentioned the application are each
Fingerprint identification device in kind embodiment.
Optionally, which can be shown using the display screen in above description, such as LCD display or OLED
Screen.When the display screen is OLED display screen, the luminescent layer of the display screen includes multiple organic light-emitting diode light sources, and wherein this refers to
Line identification device is using at least partly excitation light source of the organic light-emitting diode light source as fingerprint recognition.
It is non-limiting as example, the electronic equipment can for terminal device, mobile phone, tablet computer, laptop,
Desktop computer, vehicle electronic device or wearable intelligent equipment etc., the wearable intelligent equipment include function is complete, size is big,
Smart phone can not depended on and realize complete or partial function, such as: smartwatch or intelligent glasses etc., and only it is absorbed in Mr. Yu
A kind of application function needs to be used cooperatively with other equipment such as smart phone, such as Intelligent bracelet, the intelligence of all kinds of carry out sign monitorings
The equipment such as energy jewellery.
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 the range of the embodiment of the present application is limited, those skilled in the art can be on the basis of above-described embodiment
It is upper to carry out various improvement and deformations, and these are improved or deformation is all fallen in the protection scope of the application.
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 easily think of the change or the replacement, and should all contain
Lid is within the scope of protection of this application.Therefore, the protection scope of the application should be based on the protection scope of the described claims.
Claims (22)
1. a kind of fingerprint identification method characterized by comprising
It is reflected when irradiating fingerprint collecting region respectively according to the light of multiple wavelength from the object of the fingerprint collecting overlying regions
Optical signal is imaged, and multiple image is obtained；
Judge the object for living body finger print or non-living body fingerprint according to the multiple image.
2. the method according to claim 1, wherein the light according to multiple wavelength irradiates fingerprint collecting respectively
It is imaged when region from the optical signal that the object of the fingerprint collecting overlying regions reflects, comprising:
It is reflected when different moments successively irradiating the fingerprint collecting region from the object according to the light of the multiple wavelength
Optical signal is imaged.
3. the method according to claim 1, wherein the light according to multiple wavelength irradiates fingerprint collecting respectively
It is imaged when region from the optical signal that the object of the fingerprint collecting overlying regions reflects, comprising:
According to the light of the multiple wavelength when synchronization irradiates multiple subregions in the fingerprint collecting region respectively from
The optical signal of the object reflection is imaged.
4. according to the method described in claim 3, it is characterized in that, the multiple subregion is by the fingerprint collecting region
The heart is distributed around.
5. method according to claim 1 to 4, which is characterized in that described to be judged according to the multiple image
The object is living body finger print or non-living body fingerprint, comprising:
According to the image data of width image each in the multiple image, the first parameter is calculated；
According to first parameter, judge the object for living body finger print or non-living body fingerprint.
6. method according to claim 1 to 4, which is characterized in that described to be judged according to the multiple image
The object is living body finger print or non-living body fingerprint, comprising:
Image co-registration is carried out to the multiple image, obtains blending image；
Judge the object for living body finger print or non-living body fingerprint according to the blending image.
7. method according to any one of claim 1 to 6, which is characterized in that the method also includes:
The matching of fingerprint image is carried out according to the first image in the multiple image；
If successful match and judging the object for living body finger print, it is determined that fingerprint recognition success.
8. the method according to the description of claim 7 is characterized in that the first image is according to silent in the multiple wavelength
Recognize the image being imaged when the light of wavelength irradiates the object from the optical signal that the object reflects.
9. method according to any one of claim 1 to 8, which is characterized in that the light of the multiple wavelength include feux rouges,
At least two in green light and blue light.
10. method according to any one of claim 1 to 9, which is characterized in that the light of the multiple wavelength is from organic
At least partly OLED light source in light emitting diode (LED) display screen OLED.
11. a kind of fingerprint identification device characterized by comprising
Optical fingerprint sensor, from the fingerprint collecting area when for irradiating fingerprint collecting region respectively according to the light of multiple wavelength
The optical signal of object reflection above domain is imaged, and obtains multiple image, wherein the multiple image is for judging the object
Body is living body finger print or non-living body fingerprint.
12. fingerprint identification device according to claim 11, which is characterized in that the optical fingerprint sensor is specifically used
In:
It is reflected when different moments successively irradiating the fingerprint collecting region from the object according to the light of the multiple wavelength
Optical signal is imaged.
13. fingerprint identification device according to claim 11, which is characterized in that the optical fingerprint sensor is specifically used
In:
According to the light of the multiple wavelength when synchronization irradiates multiple subregions in the fingerprint collecting region respectively from
The optical signal of the object reflection is imaged.
14. fingerprint identification device according to claim 13, which is characterized in that the multiple subregion is adopted by the fingerprint
The center in collection region is distributed around.
15. fingerprint identification device described in any one of 1 to 14 according to claim 1, which is characterized in that the fingerprint recognition dress
It sets further include:
Processor, for judging the object for living body finger print or non-living body fingerprint according to the multiple image.
16. fingerprint identification device according to claim 15, which is characterized in that the processor is specifically used for:
Image co-registration is carried out to the multiple image, obtains blending image；
Judge the object for living body finger print or non-living body fingerprint according to the blending image.
17. fingerprint identification device according to claim 16, which is characterized in that the processor is specifically used for:
According to the image data of width image each in the multiple image, the first parameter is calculated；
According to first parameter, judge the object for living body finger print or non-living body fingerprint.
18. fingerprint identification device described in any one of 5 to 17 according to claim 1, which is characterized in that the processor is also used
In:
The matching of fingerprint image is carried out according to the first image in the multiple image；
If successful match and judging the object for living body finger print, it is determined that fingerprint recognition success.
19. fingerprint identification device according to claim 18, which is characterized in that the first image is according to the multiple
The image being imaged when the light of default wavelength in wavelength irradiates the object from the optical signal that the object reflects.
20. fingerprint identification device described in any one of 1 to 19 according to claim 1, which is characterized in that the multiple wavelength
Light includes at least two in feux rouges, green light and blue light.
21. fingerprint identification device described in any one of 1 to 20 according to claim 1, which is characterized in that the multiple wavelength
At least partly OLED light source of the light in organic light-emitting diode (OLED) display screen OLED.
22. a kind of electronic equipment characterized by comprising fingerprint recognition described in any one of 1 to 20 according to claim 1
Device.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/122476 WO2020124511A1 (en) | 2018-12-20 | 2018-12-20 | Fingerprint recognition method, fingerprint recognition device and electronic apparatus |
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| CN109716353A true CN109716353A (en) | 2019-05-03 |
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| CN201880003000.3A Pending CN109716353A (en) | 2018-12-20 | 2018-12-20 | Fingerprint identification method, fingerprint identification device and electronic equipment |
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| WO (1) | WO2020124511A1 (en) |
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