CN106250883B - Pressure fingerprint identification method, device and terminal device - Google Patents
Pressure fingerprint identification method, device and terminal device Download PDFInfo
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- CN106250883B CN106250883B CN201610740377.XA CN201610740377A CN106250883B CN 106250883 B CN106250883 B CN 106250883B CN 201610740377 A CN201610740377 A CN 201610740377A CN 106250883 B CN106250883 B CN 106250883B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
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Abstract
The present invention proposes that a kind of pressing fingerprint identification method, device and terminal device, the pressing fingerprint identification method include, and when detecting that user's finger touches fingerprint recognition mould group, determines the first pressure value that current finger print identification mould group is subject to；According to preset calibration strategy, the first calibration parameter corresponding with first pressure value is obtained；According to first calibration parameter, acquisition presses the first image of the finger of the fingerprint recognition mould group.Pressing fingerprint identification method, device and terminal device provided by the present application, pass through the pressure value being subject to according to fingerprint recognition mould group, calibration parameter is adjusted to carry out fingerprint image acquisition, reduce the prover time of fingerprint recognition mould group, improve the acquisition speed of fingerprint image, to improve the accuracy of pressure fingerprint recognition, user experience is improved.
Description
Technical field
The present invention relates to technical field of image processing more particularly to a kind of pressure fingerprint identification method, device and terminal to set
It is standby.
Background technique
It is very common that fingerprint identification module is set on mobile terminal at present.Fingerprint recognition can be not only used for unlock, wake up
Etc. functions and mobile payment an important ring.
In general, fingerprint identification process is main comprising the following three steps: calibrated to fingerprint recognition mould group, and determine school
Quasi- parameter；Fingerprint image is acquired according to calibration parameter, then the fingerprint image of acquisition is compared with stored fingerprint image,
Obtain recognition result.
But for currently used pressure fingerprint, since fingerprint is when being squeezed, it can deform, so that
The fingerprint image of acquisition is not easy to identify.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, an object of the present invention is to provide a kind of pressing fingerprint identification methods, by according to fingerprint recognition mould
The pressure value that group is subject to adjusts calibration parameter to carry out fingerprint image acquisition, reduces the prover time of fingerprint recognition mould group, mention
The acquisition speed of high fingerprint image improves user experience to improve the accuracy of pressure fingerprint recognition.
Second object of the present invention is to propose a kind of pressing fingerprint identification device.
Third object of the present invention is to propose a kind of terminal device.
In order to achieve the above objectives, the pressing fingerprint identification method that first aspect present invention embodiment proposes, comprising: detecting
When touching fingerprint recognition mould group to user's finger, the first pressure value that current finger print identification mould group is subject to is determined；According to default
Calibration strategy, obtain corresponding with first pressure value the first calibration parameter；According to first calibration parameter, acquisition is pressed
Press the first image of the finger of the fingerprint recognition mould group.
Pressing fingerprint identification method provided by the embodiments of the present application is detecting that user's finger touches fingerprint recognition mould group
When, it is first determined the first pressure value that is subject to of current finger print identification mould group, then according to preset calibration strategy, acquisition with it is described
First pressure is worth corresponding first calibration parameter；Further according to first calibration parameter, acquisition presses the fingerprint recognition mould group
Finger the first image.As a result, by the pressure value being subject to according to fingerprint recognition mould group, calibration parameter is adjusted to carry out fingerprint
Image Acquisition reduces the prover time of fingerprint recognition mould group, the acquisition speed of fingerprint image is improved, to improve pressure
The accuracy of fingerprint recognition, improves user experience.
In order to achieve the above objectives, the pressing fingerprint identification device that second aspect of the present invention embodiment proposes, comprising: first really
Cover half block, the be subject to for when detecting that user's finger touches fingerprint recognition mould group, determining current finger print identification mould group
One pressure value；First obtains module, for obtaining the first school corresponding with first pressure value according to preset calibration strategy
Quasi- parameter；First acquisition module, for according to first calibration parameter, acquisition to press the finger of the fingerprint recognition mould group
First image.
Pressing fingerprint identification device provided by the embodiments of the present application is detecting that user's finger touches fingerprint recognition mould group
When, it is first determined the first pressure value that is subject to of current finger print identification mould group, then according to preset calibration strategy, acquisition with it is described
First pressure is worth corresponding first calibration parameter；Further according to first calibration parameter, acquisition presses the fingerprint recognition mould group
Finger the first image.As a result, by the pressure value being subject to according to fingerprint recognition mould group, calibration parameter is adjusted to carry out fingerprint
Image Acquisition reduces the prover time of fingerprint recognition mould group, the acquisition speed of fingerprint image is improved, to improve pressure
The accuracy of fingerprint recognition, improves user experience.
In order to achieve the above objectives, the terminal device that third aspect present invention embodiment proposes, comprising: shell；Processor；It deposits
Reservoir；Fingerprint recognition mould group；Circuit board, power circuit and communication component；Wherein, circuit board is placed in the space that shell surrounds
Portion, processor, memory and the setting of fingerprint recognition mould group are on circuit boards；Power circuit, for each electricity for terminal device
Road or device power supply；Memory is for storing executable program code；Processor is executable by storing in reading memory
Program code runs program corresponding with executable program code, for executing: detecting that user's finger touches finger
When line identifies mould group, the first pressure value that current finger print identification mould group is subject to is determined；According to preset calibration strategy, acquisition and institute
State corresponding first calibration parameter of first pressure value；According to first calibration parameter, acquisition presses the fingerprint recognition mould group
Finger the first image.
Terminal device provided by the embodiments of the present application, when detecting that user's finger touches fingerprint recognition mould group, first
It determines the first pressure value that current finger print identification mould group is subject to, then according to preset calibration strategy, obtains and first pressure
Corresponding first calibration parameter of force value；Further according to first calibration parameter, acquisition presses the finger of the fingerprint recognition mould group
The first image.As a result, by the pressure value being subject to according to fingerprint recognition mould group, adjusts calibration parameter and adopted with carrying out fingerprint image
Collection, reduces the prover time of fingerprint recognition mould group, improves the acquisition speed of fingerprint image, to improve the knowledge of pressure fingerprint
Other accuracy, improves user experience.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is the flow diagram for the pressing fingerprint identification method that one embodiment of the invention proposes；
Fig. 2 is the fingerprint recognition modular structure schematic diagram that one embodiment of the invention proposes；
Fig. 3 is the flow diagram for the pressing fingerprint identification method that another embodiment of the present invention proposes；
Fig. 4 is the structural schematic diagram for the pressing fingerprint identification device that one embodiment of the invention proposes；
Fig. 5 is the structural schematic diagram for the pressing fingerprint identification device that another embodiment of the present invention proposes；
Fig. 6 is the structural schematic diagram for the terminal device that one embodiment of the invention proposes.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.On the contrary, this
The embodiment of invention includes all changes fallen within the scope of the spiritual and intension of attached claims, modification and is equal
Object.
Fig. 1 is the flow diagram for the pressure fingerprint identification method that one embodiment of the invention proposes.
As shown in Figure 1, the pressure fingerprint identification method, comprising:
S101 determines what current finger print identification mould group was subject to when detecting that user's finger touches fingerprint recognition mould group
First pressure value.
Specifically, the executing subject of pressure fingerprint identification method provided in this embodiment, is provided by the embodiments of the present application
Pressure fingerprint identification device, the pressure fingerprint identification device can be configured in any terminal for being equipped with pressure fingerprint mould group
In equipment.
Wherein, terminal device can be smart phone, tablet computer, personal digital assistant, e-book etc..
Specifically, as shown in Fig. 2, Fig. 2 is fingerprint recognition modular structure schematic diagram provided in an embodiment of the present invention.Such as Fig. 2
Shown, the fingerprint recognition mould group in the embodiment of the present application specifically includes that equipment component 1, pressure elements 2 and fingerprint sensor 3.?
Equipment component 1 integrates fingerprint sensor 3 simultaneously below and pressure elements 2 makes equipment component 1 be provided simultaneously with finger pressure control
And the function of fingerprint recognition.
When user's finger is pressed into equipment component 1, the pressure of pressing is transmitted directly to pressure elements 2, fingerprint sensor 3
User fingerprints information is obtained across pressure elements 2 and equipment component 1.
When specific implementation, fingerprint sensor 3 can be directly welded on the circuit substrate of terminal device, case ring and substrate
Following steel is mended through glue or laser electric welding link.Wherein, equipment component 1 includes one be not limited in following any material
Kind ceramics, glass, sprayed on material, pet material, sapphire material etc., pressure elements 2 include being not limited to piezoelectric material film, are pressed
Force snesor etc., the working principle of fingerprint sensor 3 include but is not limited to following any form: electric from condenser type, mutual tolerance is held
Appearance formula, ultrasonic type, optical profile type.
Wherein, pressure fingerprint identification device can determine whether user's finger touches fingerprint recognition in several ways
Mould group.
Example one
Determine that the current capacitance of the fingerprint recognition mould group is different from preset capacitance.
Specifically, the capacitance of fingerprint recognition mould group can change when user's touch fingerprint identifies mould group, it therefore, can
Judge whether the capacitance of fingerprint recognition mould group is identical as preset capacitance to pass through, to determine whether user touches fingerprint
Identify mould group.Wherein, preset capacitance, capacitance when referring to fingerprint recognition mould group in normal state.
Example two
Determine that the image acquired before the image and prefixed time interval that fingerprint recognition mould group currently acquires is different.
Wherein, prefixed time interval can according to need setting, for example be 10 seconds (s), 30s, 40s etc..
Specifically, fingerprint recognition mould group can be according between the preset time before user's finger touch fingerprint identifies mould group
Every, repeat Image Acquisition, and the image acquired before the image and prefixed time interval of current time acquisition is compared,
If the two is identical, then it is assumed that do not have finger touch to fingerprint recognition mould group, if not identical, it is believed that there is the knowledge of finger touch fingerprint
Other mould group, to can be detected current touch pressure value.
S102 obtains the first calibration parameter corresponding with first pressure value according to preset calibration strategy.
S103, according to first calibration parameter, acquisition presses the first image of the finger of the fingerprint recognition mould group.
The embodiment of the present application before acquiring fingerprint image, first has to fingerprint recognition mould group mainly in the prior art
Parametric calibration is repeated, so that the clarity for the fingerprint image for acquiring fingerprint recognition mould group and grey whiteness are higher, and to pressure
For power fingerprint, during parametric calibration, due to the increase of pressure, it may cause the fingerprint image acquired after calibration and occurred
Deformation proposes a kind of by the pressure fingerprint identification device, set pressure in advance to bring difficult problem to identification
The mapping relations of range and calibration parameter, so that detection fingerprint first is known when detecting the trigger event for obtaining calibration parameter
Then the first pressure value that other mould group is subject to obtains corresponding first calibration parameter according to first pressure value, and then according to determination
The first calibration parameter, acquire the first image of finger.The acquisition speed of fingerprint is accelerated, is become to ensure that as far as possible in pressure
Before big, fingerprint image acquisition is completed.
Specifically, can first determine that the pressure limit where first pressure value；Then according to preset pressure limit and school
The mapping relations of quasi- parameter determine first calibration parameter.
Wherein, the mapping relations of pressure limit and calibration parameter, can be by instructing a large amount of fingerprint image data
It gets.It is understood that different pressure limits, need to correspond to different calibration parameters, i.e., different pressure limits is corresponding
Image Acquisition speed it is different.
For example, if pressure value is greater than 0.5 newton (N), fingerprint image will be deformed, then pressure fingerprint recognition fills
It sets it is necessary to control fingerprint recognition mould group before pressure value reaches 0.5N, completes fingerprint collecting.And usually manpower presses fingerprint recognition
The pressure of mould group gradually increases, therefore when first pressure value is respectively 0.2N or 0.4N, and corresponding first calibration parameter needs
It is not identical, it just can guarantee before pressure value reaches 0.5N, complete the acquisition of image.
It is understood that after the acquisition for completing fingerprint image according to the first calibration parameter, pressure fingerprint identification device,
Signature analysis can be carried out to the fingerprint image of acquisition, is compared, to judge whether and preset fingerprint matching.Alternatively, can be after
The pressure value that continuous monitoring fingerprint recognition mould group is subject to, and according to the pressure value being subject to, corresponding operating is carried out to terminal, for example solve
Lock, starting respective application etc..
Pressure fingerprint identification method provided by the embodiments of the present application is detecting that user's finger touches fingerprint recognition mould group
When, it is first determined the first pressure value that is subject to of current finger print identification mould group, then according to preset calibration strategy, acquisition with it is described
First pressure is worth corresponding first calibration parameter；Further according to first calibration parameter, acquisition presses the fingerprint recognition mould group
Finger the first image.As a result, by the pressure value being subject to according to fingerprint recognition mould group, calibration parameter is adjusted to carry out fingerprint
Image Acquisition reduces the prover time of fingerprint recognition mould group, the acquisition speed of fingerprint image is improved, to improve pressure
The accuracy of fingerprint recognition, improves user experience.
By above-mentioned analysis it is found that by shifting to an earlier date preset different pressure limit and calibration in pressure fingerprint identification device
The mapping relations of parameter, so that pressure value when can touch fingerprint identification device according to user's finger, chooses suitable school
Quasi- parameter carries out Image Acquisition, to guarantee before fingerprint is because of pressure distortion as far as possible, completes fingerprint collecting.But in a kind of possibility
Way of realization in, if calibration parameter has error, so that after the completion of Image Acquisition, finger press pressure simultaneously not up to becomes fingerprint
The threshold values of shape, then in order to improve acquisition image accuracy, after adjustable calibration parameter, continue to acquire fingerprint image.Under
Face combines Fig. 3 to above situation, is described in detail.
Fig. 3 is the flow diagram for the pressure fingerprint identification method that another embodiment of the present invention proposes.Referring to Fig. 3, the pressure
Power fingerprint identification method, after above-mentioned S103, further includes:
Whether S301, the second pressure value for judging that the fingerprint recognition mould group is subject to are greater than preset value, if so, executing
Otherwise S302 executes S303.
Wherein, preset value, the pressure threshold for having guided fingerprint to deform, when press values are greater than the preset value, just
Fingerprint can be made to deform.
S302 carries out fingerprint recognition to the first image.
S303 obtains the second calibration parameter corresponding with the second pressure value.
S304, according to second calibration parameter, acquisition presses the second image of the finger of the fingerprint recognition mould group.
For example, if preset value is 0.5N, first pressure value is 0.2N, and the pressure limit of 0.1N-0.3N is corresponding
Calibration parameter is A, and the corresponding calibration parameter of the pressure limit of 0.31N-0.4N is B, and fingerprint recognition is mounted in and is acquired according to parameter A
It is 0.38N by the pressure value that monitoring discovery fingerprint recognition mould group is subject to after first image of complete pressing fingerprint recognition mould group, it is small
In 0.5N, to can be B according to calibration parameter, then the second image of the finger of a pressing fingerprint recognition mould group be acquired.
Since the first image and the corresponding calibration parameter of the second image are different, corresponding first image and the second image it is clear
Clear degree and grey whiteness etc. be not also identical, so that pressure fingerprint identification device, can choose one from the first image and the second image
A more visible image, as final image to be identified.That is this method further include:
S305 determines the image score of the first image Yu second image.
S306 carries out fingerprint recognition to the higher image of score.
Specifically, can be according to sharpness of lines information, the black white contrast information, spy in the first image and the second image
Sign point information etc. calculates the score of each image.Under normal conditions, the lower image of score illustrates in image comprising fuzzy graph
Picture, or have sweat stain etc., therefore fingerprint recognition is carried out to the higher image of score, the accuracy rate of fingerprint recognition can be improved.
Pressure fingerprint identification method provided by the embodiments of the present application is detecting that user's finger touches fingerprint recognition mould group
When, it is first determined the first pressure value that is subject to of current finger print identification mould group, then according to preset calibration strategy, acquisition with it is described
First pressure is worth corresponding first calibration parameter；Further according to first calibration parameter, acquisition presses the fingerprint recognition mould group
Finger the first image, whether the second pressure value for then judging that fingerprint recognition mould group is subject to is greater than preset value, if less
In, then the second calibration parameter corresponding with second pressure value is obtained again, then according to the second calibration parameter, acquires the second image,
The score of the first image and the second image is determined again, and fingerprint recognition is carried out to the high image of score.As a result, by according to fingerprint
The pressure value that identification mould group is subject to adjusts calibration parameter to carry out fingerprint image acquisition, reduces the calibration of fingerprint recognition mould group
Time, the acquisition speed for improving fingerprint image improve user experience to improve the accuracy of pressure fingerprint recognition,
It is as much as possible to acquire fingerprint image, and the figure high to score using different calibration parameters and before pressure value becomes larger
As carrying out fingerprint recognition, the accuracy rate of fingerprint recognition is improved.
Fig. 4 is the structural schematic diagram for the pressing fingerprint identification device that one embodiment of the invention proposes.
Referring to fig. 4, which includes: that the first determining module 41, first acquisition module 42 and first is adopted
Collect module 43.Wherein,
First determining module 41, for determining current finger print when detecting that user's finger touches fingerprint recognition mould group
The first pressure value that identification mould group is subject to；
First obtains module 42, for obtaining and first pressure value corresponding first according to preset calibration strategy
Calibration parameter；
First acquisition module 43, for according to first calibration parameter, acquisition to press the hand of the fingerprint recognition mould group
The first image referred to.
Specifically, above-mentioned first determining module 41, is specifically used for:
Determine that the current capacitance of the fingerprint recognition mould group is different from preset capacitance；Alternatively,
Determine that the image acquired before the image and prefixed time interval that fingerprint recognition mould group currently acquires is different.
Above-mentioned first obtains module 42, is specifically used for:
Determine the pressure limit where the first pressure value；
According to the mapping relations of preset pressure limit and calibration parameter, first calibration parameter is determined.
It should be noted that being also suitable in 1 embodiment of earlier figures to the explanation of pressing fingerprint identification method embodiment
In the pressing fingerprint identification device of the embodiment, realization principle is similar, and details are not described herein again.
Pressure fingerprint identification device provided by the embodiments of the present application is detecting that user's finger touches fingerprint recognition mould group
When, it is first determined the first pressure value that is subject to of current finger print identification mould group, then according to preset calibration strategy, acquisition with it is described
First pressure is worth corresponding first calibration parameter；Further according to first calibration parameter, acquisition presses the fingerprint recognition mould group
Finger the first image.As a result, by the pressure value being subject to according to fingerprint recognition mould group, calibration parameter is adjusted to carry out fingerprint
Image Acquisition reduces the prover time of fingerprint recognition mould group, the acquisition speed of fingerprint image is improved, to improve pressure
The accuracy of fingerprint recognition, improves user experience.
Fig. 5 is the structural schematic diagram for the pressing fingerprint identification device that another embodiment of the present invention proposes.
As shown in figure 5, on the basis of pressing fingerprint identification device based on shown in Fig. 4, the pressing fingerprint identification device, also
Include:
Whether judgment module 51, the second pressure value for judging that the fingerprint recognition mould group is subject to are greater than preset value；
Second obtains module 52, if the second pressure value for fingerprint recognition mould group to be subject to is not more than preset value, obtains
Take the second calibration parameter corresponding with the second pressure value；
Second acquisition module 53, for according to second calibration parameter, acquisition to press the hand of the fingerprint recognition mould group
The second image referred to.
Further, further includes:
Second determining module 54, for determining the image score of the first image Yu second image；
Processing module 55, for carrying out fingerprint recognition to the higher image of score.
It should be noted that being also suitable in 3 embodiment of earlier figures to the explanation of pressing fingerprint identification method embodiment
In the pressing fingerprint identification device of the embodiment, realization principle is similar, and details are not described herein again.
Pressure fingerprint identification device provided by the embodiments of the present application is detecting that user's finger touches fingerprint recognition mould group
When, it is first determined the first pressure value that is subject to of current finger print identification mould group, then according to preset calibration strategy, acquisition with it is described
First pressure is worth corresponding first calibration parameter；Further according to first calibration parameter, acquisition presses the fingerprint recognition mould group
Finger the first image, whether the second pressure value for then judging that fingerprint recognition mould group is subject to is greater than preset value, if less
In, then the second calibration parameter corresponding with second pressure value is obtained again, then according to the second calibration parameter, acquires the second image,
The score of the first image and the second image is determined again, and fingerprint recognition is carried out to the high image of score.As a result, by according to fingerprint
The pressure value that identification mould group is subject to adjusts calibration parameter to carry out fingerprint image acquisition, reduces the calibration of fingerprint recognition mould group
Time, the acquisition speed for improving fingerprint image improve user experience to improve the accuracy of pressure fingerprint recognition,
It is as much as possible to acquire fingerprint image, and the figure high to score using different calibration parameters and before pressure value becomes larger
As carrying out fingerprint recognition, the accuracy rate of fingerprint recognition is improved.
Fig. 6 is the structural schematic diagram for the terminal device that one embodiment of the invention proposes.
Referring to Fig. 6, which includes: shell 61, processor 62, memory 63, fingerprint recognition mould group 64, circuit board
65, power circuit 66 and communication component 67, wherein circuit board 65 is placed in the space interior that shell 61 surrounds, and processor 62 is deposited
Reservoir 63 and fingerprint recognition mould group 64 are arranged on circuit board 65；Power circuit 66, for for terminal device each circuit or
Device power supply；Memory 63 is for storing executable program code；Processor 62 is executable by storing in reading memory
Program code runs program corresponding with executable program code, for executing:
When detecting that user's finger touches fingerprint recognition mould group, the first pressure that current finger print identification mould group is subject to is determined
Force value；
According to preset calibration strategy, the first calibration parameter corresponding with first pressure value is obtained；
According to first calibration parameter, acquisition presses the first image of the finger of the fingerprint recognition mould group.
It should be noted that the aforementioned explanation to pressing fingerprint identification method embodiment is also applied for the embodiment
Terminal device, realization principle is similar, and details are not described herein again.
Pressure fingerprint identification device provided by the embodiments of the present application is detecting that user's finger touches fingerprint recognition mould group
When, it is first determined the first pressure value that is subject to of current finger print identification mould group, then according to preset calibration strategy, acquisition with it is described
First pressure is worth corresponding first calibration parameter；Further according to first calibration parameter, acquisition presses the fingerprint recognition mould group
Finger the first image.As a result, by the pressure value being subject to according to fingerprint recognition mould group, calibration parameter is adjusted to carry out fingerprint
Image Acquisition reduces the prover time of fingerprint recognition mould group, the acquisition speed of fingerprint image is improved, to improve pressure
The accuracy of fingerprint recognition, improves user experience.
It should be noted that in the description of the present invention, term " first ", " second " etc. are used for description purposes only, without
It can be interpreted as indication or suggestion relative importance.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " multiple "
It is two or more.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (9)
1. a kind of pressure fingerprint identification method, which comprises the following steps:
When detecting that user's finger touches fingerprint recognition mould group, the first pressure that current finger print identification mould group is subject to is determined
Value；
According to preset calibration strategy, the first calibration parameter corresponding with first pressure value is obtained；
According to first calibration parameter, acquisition presses the first image of the finger of the fingerprint recognition mould group；
Whether the second pressure value for judging that the fingerprint recognition mould group is subject to is greater than preset value；
If it is not, then obtaining the second calibration parameter corresponding with second pressure value；
According to second calibration parameter, acquisition presses the second image of the finger of the fingerprint recognition mould group.
2. the method as described in claim 1, which is characterized in that it is described to detect that user's finger touches fingerprint recognition mould group,
Include:
Determine that the current capacitance of the fingerprint recognition mould group is different from preset capacitance；Alternatively,
Determine that the image acquired before the image and prefixed time interval that fingerprint recognition mould group currently acquires is different.
3. the method as described in claim 1, which is characterized in that it is described according to preset calibration strategy, it obtains and described first
Corresponding first calibration parameter of pressure value, comprising:
Determine the pressure limit where the first pressure value；
According to the mapping relations of preset pressure limit and calibration parameter, first calibration parameter is determined.
4. the method as described in claim 1, which is characterized in that it is described according to second calibration parameter, it acquires described in pressing
After second image of the finger of fingerprint recognition mould group, further includes:
Determine the image score of the first image Yu second image；
Fingerprint recognition is carried out to the higher image of score.
5. a kind of pressure fingerprint identification device characterized by comprising
First determining module, for when detecting that user's finger touches fingerprint recognition mould group, determining that current finger print identifies mould
The first pressure value that group is subject to；
First obtains module, for obtaining the first calibration ginseng corresponding with first pressure value according to preset calibration strategy
Number；
First acquisition module, for according to first calibration parameter, acquisition presses the of the finger of the fingerprint recognition mould group
One image；
Whether judgment module, the second pressure value for judging that the fingerprint recognition mould group is subject to are greater than preset value；
Second obtains module, if being not more than preset value, acquisition and institute for the second pressure value that fingerprint recognition mould group is subject to
State corresponding second calibration parameter of second pressure value；
Second acquisition module, for according to second calibration parameter, acquisition presses the of the finger of the fingerprint recognition mould group
Two images.
6. device as claimed in claim 5, which is characterized in that first determining module is specifically used for:
Determine that the current capacitance of the fingerprint recognition mould group is different from preset capacitance；Alternatively,
Determine that the image acquired before the image and prefixed time interval that fingerprint recognition mould group currently acquires is different.
7. device as claimed in claim 6, which is characterized in that described first obtains module, is specifically used for:
Determine the pressure limit where the first pressure value；
According to the mapping relations of preset pressure limit and calibration parameter, first calibration parameter is determined.
8. device as claimed in claim 5, which is characterized in that further include:
Second determining module, for determining the image score of the first image Yu second image；
Processing module, for carrying out fingerprint recognition to the higher image of score.
9. a kind of terminal device characterized by comprising
Shell；
Processor；
Memory；
Fingerprint recognition mould group；
Circuit board, power circuit and communication component；
Wherein, circuit board is placed in the space interior that shell surrounds, and processor, memory and fingerprint recognition mould group are arranged in circuit
On plate；Power circuit, for each circuit or the device power supply for terminal device；Memory is for storing executable program generation
Code；Processor runs journey corresponding with executable program code by reading the executable program code stored in memory
Sequence, for executing:
When detecting that user's finger touches fingerprint recognition mould group, the first pressure that current finger print identification mould group is subject to is determined
Value；
According to preset calibration strategy, the first calibration parameter corresponding with first pressure value is obtained；
According to first calibration parameter, acquisition presses the first image of the finger of the fingerprint recognition mould group；
Whether the second pressure value for judging that the fingerprint recognition mould group is subject to is greater than preset value；
If it is not, then obtaining the second calibration parameter corresponding with second pressure value；
According to second calibration parameter, acquisition presses the second image of the finger of the fingerprint recognition mould group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN106815564A (en) * | 2016-12-28 | 2017-06-09 | 深圳天珑无线科技有限公司 | A kind of calibration method of fingerprint recognition system, system and a kind of electronic equipment |
| CN108573188B (en) * | 2017-03-07 | 2021-10-08 | 宏碁股份有限公司 | Fingerprint sensing device, electronic device and calibration method of fingerprint sensor |
| US11216546B2 (en) * | 2017-04-19 | 2022-01-04 | Fingerprint Cards Anacatum Ip Ab | Method for fingerprint authentication using force value |
| CN107798287B (en) * | 2017-08-29 | 2020-07-17 | 北京集创北方科技股份有限公司 | Biological feature recognition method and device |
| CN109740414A (en) * | 2018-11-15 | 2019-05-10 | 芯海科技（深圳）股份有限公司 | A kind of method and screen mould group for realizing fingerprint recognition under 3D screen using piezoresistive transducer |
| CN110276190B (en) * | 2019-06-28 | 2021-06-15 | Oppo广东移动通信有限公司 | Fingerprint identification method and related product |
| CN110910552A (en) * | 2019-11-06 | 2020-03-24 | 广州京海科技有限公司 | Fingerprint entrance guard equipment that recognition accuracy is high |
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