CN107832666A - Fingerprint identification method and device - Google Patents
Fingerprint identification method and device Download PDFInfo
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- CN107832666A CN107832666A CN201710938304.6A CN201710938304A CN107832666A CN 107832666 A CN107832666 A CN 107832666A CN 201710938304 A CN201710938304 A CN 201710938304A CN 107832666 A CN107832666 A CN 107832666A
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- fingerprint
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- fingerprint recognition
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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
-
- 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
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
-
- 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
- G06V40/1365—Matching; Classification
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- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Image Input (AREA)
- Collating Specific Patterns (AREA)
Abstract
The invention discloses a kind of fingerprint identification method and device.Wherein, this method includes：The fingerprint signal in the fingerprint recognition region of detection terminal；When detecting fingerprint signal, judge whether fingerprint signal is stablized；In the case where fingerprint signal is stable, the parameter of the fingerprint recognition chip of terminal is adjusted according to fingerprint signal.The present invention is solved in the prior art because fingerprint is after contact fingerprint recognition region and unstable, causes fingerprint recognition chip needs repeatedly to adjust the technical problem of identification parameter.
Description
Technical field
The present invention relates to fingerprint recognition field, in particular to a kind of fingerprint identification method and device.
Background technology
Fingerprint identification technology, it is widely used reply safety, the solution of security applications in mobile terminal device.
More and more extensive with application, Consumer's Experience also proposes higher requirement continuous.
But due to human body difference, and various complicated use environments, it is desirable to which fingerprint identification device can accurate fingerprint
Compare and judge.In order to adapt to the above situation, optimal mode is to adjust fingerprint recognition accordingly for different fingerprints every time
The parameter of chip, to obtain quality finger print information good enough.
In existing application scheme, in the hibernation mode, once finger down, it will usually parameter adjustment is directly carried out, by
It is now and unstable it is possible that needing repeatedly adjustment just to obtain accurate parameter, if single adjustment is easy in finger itself
Parameter is caused to be forbidden.
For because fingerprint is after contact fingerprint recognition region and unstable, causing fingerprint recognition chip in the prior art
The problem of needing repeatedly to adjust identification parameter, effective solution is not yet proposed at present.
The content of the invention
The embodiments of the invention provide a kind of fingerprint identification method and device, at least to solve in the prior art due to fingerprint
It is after contact fingerprint recognition region and unstable, cause fingerprint recognition chip needs repeatedly to adjust the technology of identification parameter and ask
Topic.
One side according to embodiments of the present invention, there is provided a kind of fingerprint identification method, including：The fingerprint of detection terminal
The fingerprint signal of identification region；When detecting fingerprint signal, judge whether fingerprint signal is stablized；In the feelings that fingerprint signal is stable
Under condition, the parameter of the fingerprint recognition chip of terminal is adjusted according to fingerprint signal.
Further, the information in fingerprint in fingerprint recognition region is obtained；Whether fingerprint is detected according to information in fingerprint
It is stable.
Further, two frame information in fingerprint of interval preset time are obtained；Gathered in each information in fingerprint
The macro block of default size, wherein, the position that macro block is gathered in each information in fingerprint is identical；According to each pixel in macro block
The pixel value of point determines whether fingerprint is stablized.
Further, it is whether identical in the pixel value of same position that two macro blocks are detected, if in the pixel of same position
The quantity of value identical pixel is more than or equal to the first preset value, it is determined that fingerprint signal is stable；Or obtain the in two macro blocks
The each pixel value and the second macro block of one macro block are less than the second preset value in the difference sum of the pixel value of same position in difference
In the case of, determine that fingerprint signal is stable.
Further, the fingerprint signal in the fingerprint recognition region of detection terminal, including：In the feelings of terminal in a dormant state
Under condition, fingerprint recognition chip according to default cycle detection fingerprint recognition region fingerprint signal.
Further, parameter includes：Put in fingerprint recognition chip in the capacitance of compensating electric capacity and/or fingerprint recognition chip
The yield value of big circuit.
Another aspect according to embodiments of the present invention, a kind of fingerprint identification device is additionally provided, including：Detection module, use
Fingerprint signal in the fingerprint recognition region of detection terminal；Judge module, for when detecting fingerprint signal, judging that fingerprint is believed
Number whether stablize；Adjusting module, in the case where fingerprint signal is stable, the fingerprint recognition of terminal to be adjusted according to fingerprint signal
The parameter of chip.
Further, judge module includes：Acquisition submodule, for obtaining the information in fingerprint in fingerprint recognition region；
Detection sub-module, for detecting whether fingerprint is stablized according to information in fingerprint.
Another aspect according to embodiments of the present invention, additionally provide a kind of storage medium, it is characterised in that storage medium bag
The program of storage is included, wherein, equipment performs above-mentioned fingerprint identification method where controlling storage medium when program is run.
Another aspect according to embodiments of the present invention, additionally provide a kind of processor, it is characterised in that processor is used to transport
Line program, wherein, program performs above-mentioned fingerprint identification method when running.
The fingerprint signal in the fingerprint recognition region of detection terminal in embodiments of the present invention, when detecting fingerprint signal,
Judge whether fingerprint signal is stablized, in the case where fingerprint signal is stable, the fingerprint recognition core of terminal is adjusted according to fingerprint signal
The parameter of piece.Such scheme is by judging whether fingerprint signal is stablized, so as to carry out fingerprint recognition core again in the case of stabilization
The adjustment of the parameter of piece.And then solve in the prior art because fingerprint is after contact fingerprint recognition region and unstable, lead
Fingerprint recognition chip is caused to need the technical problem of repeatedly adjustment identification parameter.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of fingerprint identification method according to embodiments of the present invention；
Fig. 2 is the flow chart according to a kind of optional fingerprint identification method of the above embodiments of the present application；And
Fig. 3 is the schematic diagram according to a kind of fingerprint identification device of the embodiment of the present application.
Embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, it should all belong to the model that the present invention protects
Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use
Data can exchange in the appropriate case, so as to embodiments of the invention described herein can with except illustrating herein or
Order beyond those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, be not necessarily limited to for example, containing the process of series of steps or unit, method, system, product or equipment
Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product
Or the intrinsic other steps of equipment or unit.
Embodiment 1
According to embodiments of the present invention, there is provided a kind of embodiment of fingerprint identification method is, it is necessary to illustrate, in accompanying drawing
The step of flow illustrates can perform in the computer system of such as one group computer executable instructions, although also,
Logical order is shown in flow chart, but in some cases, can be to perform shown different from order herein or retouch
The step of stating.
Fig. 1 is the flow chart of fingerprint identification method according to embodiments of the present invention, as shown in figure 1, this method is including as follows
Step：
Step S102, the fingerprint signal in the fingerprint recognition region of detection terminal.
Specifically, by taking mobile terminal as an example, the fingerprint recognition region of mobile terminal is arranged at the side of display screen, user more
When being unlocked to mobile terminal, used finger during typing fingerprint is touched or pressed fingerprint recognition region, so that
Fingerprint recognition chip gets the fingerprint signal of user.
Step S104, when detecting fingerprint signal, judge whether fingerprint signal is stablized.
Specifically, aforementioned stable is used to characterize fingerprint in fingerprint recognition region stop preset time, and do not move.Due to
Fingerprint recognition chip needs to carry out parameter adjustment corresponding with fingerprint signal, and when finger is placed on fingerprint identification area by user
The starting stage in domain, it will usually carry out movement by a small margin or the adjustment of angle, namely fingerprint signal is unstable, in order to prevent referring to
The continuous multiple adjusting parameter of line identification chip, then judge the degree of stability of fingerprint signal before adjusting parameter.
Step S106, in the case where fingerprint signal is stable, the fingerprint recognition chip of terminal is adjusted according to fingerprint signal
Parameter.
Above-mentioned steps it is determined that the adjustment of fingerprint recognition chip parameter is just carried out after fingerprint signal is stable according to fingerprint signal,
So as to prevent situation about being repeatedly adjusted due to the unstable caused fingerprint recognition chip of fingerprint signal.
Specifically, fingerprint recognition chip is by detecting electric capacity caused by each position of fingerprint, to identify the valley and a ridge of fingerprint,
Filtering circuit and amplifying circuit are integrated with fingerprint recognition chip, filtering circuit is used for the noise for filtering fingerprint signal, amplification electricity
Road is used to be amplified the capacitance signal after filtering, more clearly differentiates the valley and a ridge of fingerprint.And for different fingers
Line, use the capacitive filter scope of filtered noise signal different.The fingerprint recognition chip of terminal is adjusted according to fingerprint signal
Parameter, can be that the scope for being used for noise filtering electric capacity in fingerprint recognition signal is adjusted according to fingerprint signal.
From the foregoing, it will be observed that the fingerprint signal in the fingerprint recognition region of the above embodiments of the present application detection terminal, refers to when detecting
During line signal, judge whether fingerprint signal is stablized, in the case where fingerprint signal is stable, the finger of terminal is adjusted according to fingerprint signal
The parameter of line identification chip.Such scheme is by judging whether fingerprint signal is stablized, so as to be referred to again in the case of stabilization
The adjustment of the parameter of line identification chip.And then solve in the prior art due to fingerprint after contact fingerprint recognition region not
It is stable, cause fingerprint recognition chip needs repeatedly to adjust the technical problem of identification parameter.
Optionally, according to the above embodiments of the present application, when detecting fingerprint signal, judge whether fingerprint signal is stablized,
Including：
Step S1021, obtain the information in fingerprint in fingerprint recognition region.
Step S1023, detect whether fingerprint is stablized according to information in fingerprint.
Optionally, according to the above embodiments of the present application, detect whether fingerprint is stablized according to information in fingerprint, including：
Step S10231, obtain two frame information in fingerprint of interval preset time.In above-mentioned step, when detecting
After fingerprint recognition signal, the adjustment of fingerprint recognition chip parameter is not carried out directly, but obtains the image letter in fingerprint recognition region
Breath, and extract and analyzed among it every two frames of preset time.Specifically, above-mentioned preset time can be 3ms or 5ms,
It should be noted that above-mentioned preset time should not be too short, if above-mentioned preset time is too short, easily cause the situation of erroneous judgement
Occur, i.e., the judged result that fingerprint has been stablized is obtained in the case where fingerprint is not stable.
Step S10233, the macro block of default size is gathered in each information in fingerprint, wherein, in each fingerprint image
The position that macro block is gathered in information is identical.
In a kind of optional embodiment, exemplified by 200*200 fingerprint image, identical bits can be taken to two field pictures
The 16*16 or 8*8 macro block put, to judge whether fingerprint signal is stablized.
Step S10235, determine whether fingerprint is stablized according to the pixel value of each pixel in macro block.
In the case where fingerprint signal is stable, in the macro block of the default size collected the pixel of each position and another
In macro block the pixel of correspondence position should identical or error it is smaller, therefore can according to the pixel value of each pixel in macro block come
Determine whether fingerprint signal is stablized.
Optionally, according to the above embodiments of the present application, whether fingerprint is determined according to the pixel value of each pixel in macro block
It is stable, including：
Step S10235a, whether two macro blocks of detection are identical in the pixel value of same position, if in the picture of same position
The quantity of element value identical pixel is more than or equal to the first preset value, it is determined that fingerprint signal is stable；Or
Step S10235b, obtain two macro blocks in the first macro block each pixel value and the second macro block in same position
The difference sum of pixel value, in the case where difference is less than the second preset value, determine that fingerprint signal is stable.
In a kind of optional embodiment, so that macro block is 8*8 as an example, it is 13 to set the first preset value, in 16 macro blocks,
If the pixel value of 15 pixels is identical, it is determined that fingerprint signal is stable.
In an alternative embodiment, still so that macro block is 8*8 as an example, it is 3 to set the second preset value, in 16 macro blocks
In, have that the pixel value of 3 pixels is different from the pixel value of correspondence position, the absolute value of difference is respectively 1,1,2, difference it
With for 4, it is thus determined that fingerprint signal and unstable.
In the case of it is determined that fingerprint signal is unstable, two continuous frames information in fingerprint is taken again, carries out above-mentioned judgement
The step whether fingerprint signal is stablized.
Optionally, according to the above embodiments of the present application, the fingerprint signal in the fingerprint recognition region of detection terminal, including：
Terminal in a dormant state in the case of, fingerprint recognition chip according to default cycle detection fingerprint recognition region fingerprint believe
Number.
Optionally, included according to the above embodiments of the present application, above-mentioned parameter：The electric capacity of compensating electric capacity in fingerprint recognition chip
The yield value of amplifying circuit in value and/or fingerprint recognition chip.Specifically, the compensating electric capacity in fingerprint recognition chip is used to offset
Interference of the noise signal to detection, such as：The cover-plate glass covered on fingerprint detection region produces certain electric capacity in itself, the electric capacity
Certain influence, as noise signal can be produced on fingerprint detection.
Fig. 2 is according to a kind of flow chart of optional fingerprint identification method of the above embodiments of the present application, with reference to Fig. 2 institutes
Show, this method may include steps of：
Step S21, terminal in a dormant state in the case of, fingerprint recognition chip press predetermined period detection terminal finger
Whether line identification region receives touch signal.Specifically, in the case where receiving touch signal, into step S22, not
In the case of receiving touch signal, re-execute step S21 and continue to detect.
Whether step S22, detection touch signal are stablized.Specifically, enter step in the case where touch signal is stable
S23, otherwise re-execute step S22 and continue to detect.
Step S23, adjust the parameter of fingerprint recognition chip.
Embodiment 2
According to embodiments of the present invention, there is provided a kind of fingerprint identification device, Fig. 3 are referred to according to one kind of the embodiment of the present application
The schematic diagram of line identification device, with reference to shown in Fig. 3, the device includes：
Detection module 30, the fingerprint signal for the fingerprint recognition region of detection terminal.
Judge module 32, for when detecting fingerprint signal, judging whether fingerprint signal is stablized.
Adjusting module 34, in the case where fingerprint signal is stable, the fingerprint recognition of terminal to be adjusted according to fingerprint signal
The parameter of chip.
From the foregoing, it will be observed that the fingerprint signal in the fingerprint recognition region that the above embodiments of the present application pass through detection module terminal, when
When detecting fingerprint signal, whether stablized by judge module fingerprint signal, in the case where fingerprint signal is stable, pass through adjustment
The parameter of the fingerprint recognition chip of module fingerprint signal adjustment terminal.Such scheme by judging whether fingerprint signal is stablized, from
And carry out the adjustment of the parameter of fingerprint recognition chip again in the case of stabilization.And then solve in the prior art because fingerprint exists
It is after contact fingerprint recognition region and unstable, cause fingerprint recognition chip needs repeatedly to adjust the technical problem of identification parameter.
Optionally, included according to the above embodiments of the present application, judge module：
Acquisition submodule, for obtaining the information in fingerprint in fingerprint recognition region.
Detection sub-module, for detecting whether fingerprint is stablized according to information in fingerprint.
Embodiment 3
According to embodiments of the present invention, there is provided a kind of storage medium, storage medium include the program of storage, wherein, in journey
Equipment performs any one fingerprint identification method in embodiment 1 where controlling storage medium during sort run.
Embodiment 4
According to embodiments of the present invention, there is provided a kind of processor, processor are used for operation program, wherein, when program is run
Perform any one fingerprint identification method in embodiment 1.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not have in some embodiment
The part of detailed description, it may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents, others can be passed through
Mode is realized.Wherein, device embodiment described above is only schematical, such as the division of the unit, Ke Yiwei
A kind of division of logic function, can there is an other dividing mode when actually realizing, for example, multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module
Connect, can be electrical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On unit.Some or all of unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use
When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part to be contributed in other words to prior art or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are causing a computer
Equipment (can be personal computer, server or network equipment etc.) perform each embodiment methods described of the present invention whole or
Part steps.And foregoing storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can be with store program codes
Medium.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
- A kind of 1. fingerprint identification method, it is characterised in that including：The fingerprint signal in the fingerprint recognition region of detection terminal；When detecting fingerprint signal, judge whether the fingerprint signal is stablized；In the case where the fingerprint signal is stable, the ginseng of the fingerprint recognition chip of the terminal is adjusted according to the fingerprint signal Number.
- 2. according to the method for claim 1, it is characterised in that when detecting fingerprint signal, judge the fingerprint signal Whether stablize, including：Obtain the information in fingerprint in the fingerprint recognition region；Detect whether the fingerprint is stablized according to the information in fingerprint.
- 3. according to the method for claim 2, it is characterised in that whether the fingerprint is detected according to the information in fingerprint It is stable, including：Obtain two frame information in fingerprint of interval preset time；The macro block of default size is gathered in each information in fingerprint, wherein, gathered in each information in fingerprint The position of the macro block is identical；Determine whether the fingerprint is stablized according to the pixel value of each pixel in the macro block.
- 4. according to the method for claim 3, it is characterised in that determined according to the pixel value of each pixel in the macro block Whether the fingerprint is stablized, including：It is whether identical in the pixel value of same position to detect two macro blocks, if in the pixel value identical pixel of same position Quantity be more than or equal to the first preset value, it is determined that the fingerprint signal is stable；OrEach pixel value of the first macro block and the second macro block are obtained in described two macro blocks in the difference of the pixel value of same position Sum, in the case where the difference is less than the second preset value, determine that the fingerprint signal is stable.
- 5. according to the method for claim 1, it is characterised in that detect the fingerprint letter in the fingerprint recognition region of the terminal Number, including：The terminal in a dormant state in the case of, the fingerprint recognition chip is according to described in default cycle detection The fingerprint signal in fingerprint recognition region.
- 6. according to the method for claim 1, it is characterised in that the parameter includes：Compensated in the fingerprint recognition chip The yield value of amplifying circuit in the capacitance of electric capacity and/or the fingerprint recognition chip.
- A kind of 7. fingerprint identification device, it is characterised in that including：Detection module, the fingerprint signal for the fingerprint recognition region of detection terminal；Judge module, for when detecting fingerprint signal, judging whether the fingerprint signal is stablized；Adjusting module, in the case where the fingerprint signal is stable, the finger of the terminal to be adjusted according to the fingerprint signal The parameter of line identification chip.
- 8. device according to claim 7, it is characterised in that the judge module includes：Acquisition submodule, for obtaining the information in fingerprint in the fingerprint recognition region；Detection sub-module, for detecting whether the fingerprint is stablized according to the information in fingerprint.
- A kind of 9. storage medium, it is characterised in that the storage medium includes the program of storage, wherein, run in described program When control the storage medium where fingerprint identification method in equipment perform claim requirement 1 to 6 described in any one.
- A kind of 10. processor, it is characterised in that the processor is used for operation program, wherein, right of execution when described program is run Profit requires the fingerprint identification method described in any one in 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710938304.6A CN107832666A (en) | 2017-09-30 | 2017-09-30 | Fingerprint identification method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710938304.6A CN107832666A (en) | 2017-09-30 | 2017-09-30 | Fingerprint identification method and device |
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| CN107832666A true CN107832666A (en) | 2018-03-23 |
Family
ID=61647700
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710938304.6A Pending CN107832666A (en) | 2017-09-30 | 2017-09-30 | Fingerprint identification method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113361418A (en) * | 2021-06-09 | 2021-09-07 | 北京集创北方科技股份有限公司 | Capacitive fingerprint detection device and terminal equipment |
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Application publication date: 20180323 |