CN106203301A - Terminal unit, fingerprint identification method and device - Google Patents
Terminal unit, fingerprint identification method and device Download PDFInfo
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- CN106203301A CN106203301A CN201610511640.8A CN201610511640A CN106203301A CN 106203301 A CN106203301 A CN 106203301A CN 201610511640 A CN201610511640 A CN 201610511640A CN 106203301 A CN106203301 A CN 106203301A
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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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- 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
- G06V40/1347—Preprocessing; Feature extraction
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Abstract
The disclosure discloses a kind of terminal unit, fingerprint identification method and device, belongs to intelligent terminal field.Described terminal unit includes: process chip, fingerprint sensor and temperature acquisition assembly, processes chip and is electrically connected with fingerprint sensor and temperature acquisition assembly respectively；Process chip, for gathering fingerprint signal by fingerprint sensor, by temperature acquisition assembly collecting temperature signal, determine the penalty coefficient that temperature signal is corresponding, according to penalty coefficient, fingerprint signal is compensated, and carry out fingerprint recognition according to the fingerprint signal after compensating；Solve the identification error processing the fingerprint signal that chip causes in order to avoid ambient temperature, need constantly to adjust hardware parameter and Processing Algorithm and multi collect fingerprint signal is identified, cause the problem that the process of whole fingerprint recognition is longer；Reach to reduce the number of times that fingerprint signal gathers, simplified the process of fingerprint recognition, accelerated the effect of fingerprint recognition speed.
Description
Technical field
It relates to intelligent terminal field, particularly to a kind of terminal unit, fingerprint identification method and device.
Background technology
Along with the development of fingerprint identification technology, such as the terminal unit of smart mobile phone, panel computer and attendance recorder etc is all
Can be embedded with fingerprint sensor, terminal unit gathers the fingerprint signal of user by fingerprint sensor, carries out fingerprint signal
Identify thus realize the functions such as unlocking screen, account number login and fingerprint attendance.
Owing to ambient temperature can affect the collection result of fingerprint signal, therefore, for same finger, terminal unit
The fingerprint signal collected at different temperatures may there are differences.In correlation technique, in order to avoid due to ambient temperature
There is the problem of error in the identification to the fingerprint signal collected caused, terminal unit is in the mistake being identified fingerprint signal
Cheng Zhong, needs constantly to adjust hardware parameter and Processing Algorithm and multi collect fingerprint signal is identified, until generating figure picture element
Measuring preferably fingerprint image, the process of whole fingerprint recognition is longer, and response speed is slower.
Summary of the invention
Longer in order to solve the fingerprint identification process of terminal unit in correlation technique, that response speed is slower problem, these public affairs
Dispersing and elevation is for a kind of terminal unit, fingerprint identification method and device.Described technical scheme is as follows:
First aspect according to disclosure embodiment, it is provided that a kind of terminal unit, this terminal unit includes: process chip,
Fingerprint sensor and temperature acquisition assembly, process chip and be electrically connected with fingerprint sensor and temperature acquisition assembly respectively；
Process chip, for gathering fingerprint signal by fingerprint sensor；
Process chip, be additionally operable to by temperature acquisition assembly collecting temperature signal；
Process chip, be additionally operable to determine the penalty coefficient that temperature signal is corresponding；
Process chip, be additionally operable to according to penalty coefficient, fingerprint signal be compensated, and according to the fingerprint signal after compensating
Carry out fingerprint recognition.
Optionally, terminal unit also includes: the front-end amplifier being electrical connected with fingerprint sensor, and, put with front end
The analog-digital converter that big device and process chip are electrical connected；
Penalty coefficient includes at least one in the parameter index of front-end amplifier and the parameter index of analog-digital converter, front
The parameter index of end amplifier at least includes the yield value of front-end amplifier, and the parameter index of analog-digital converter includes analog digital conversion
At least one of the dynamic range of device, response frequency, response speed and resolution.
Optionally, process chip, be additionally operable to:
When penalty coefficient includes the parameter index of front-end amplifier, by there is the front-end amplifier of penalty coefficient to finger
Stricture of vagina signal is amplified, and by analog-digital converter, the fingerprint signal after amplifying is carried out the fingerprint after analog digital conversion is compensated and believes
Number；
When penalty coefficient includes the parameter index of analog-digital converter, by front-end amplifier, fingerprint signal is put
Greatly, the fingerprint signal after amplifying is carried out the fingerprint after analog digital conversion is compensated by having the analog-digital converter of penalty coefficient
Signal.
Optionally, penalty coefficient includes at least one in filter function and signal amplification factor, and filter function is to finger
The function that stricture of vagina signal is filtered, amplification when signal amplification factor is to be amplified fingerprint signal.
Optionally, process chip, be additionally operable to:
When penalty coefficient includes filter function, by filter function, fingerprint signal is filtered the finger after being compensated
Stricture of vagina signal；
When penalty coefficient includes signal amplification factor, it is amplified being mended to fingerprint signal according to signal amplification factor
Fingerprint signal after repaying.
Process chip, be additionally operable to inquire about default corresponding relation, determine corresponding with temperature signal according to default corresponding relation
Penalty coefficient, default corresponding relation includes the corresponding relation between temperature signal and penalty coefficient.
Second aspect according to disclosure embodiment, it is provided that a kind of fingerprint identification method, the method is used in terminal unit,
Terminal unit includes: process chip, fingerprint sensor and temperature acquisition assembly, process chip respectively with fingerprint sensor and temperature
Acquisition component is electrically connected with, and method includes:
Fingerprint signal is gathered by fingerprint sensor；
By temperature acquisition assembly collecting temperature signal；
Determine the penalty coefficient that temperature signal is corresponding；
According to penalty coefficient, fingerprint signal is compensated, and carry out fingerprint recognition according to the fingerprint signal after compensating.
Optionally, this terminal unit also includes: the front-end amplifier being electrical connected with fingerprint sensor, and, with front end
The analog-digital converter that amplifier and process chip are electrical connected；Penalty coefficient includes that the parameter index of front-end amplifier and modulus turn
At least one in the parameter index of parallel operation, the parameter index of front-end amplifier at least includes the yield value of front-end amplifier, mould
The parameter index of number converter includes in the dynamic range of analog-digital converter, response frequency, response speed and resolution at least
A kind of.
Optionally, according to penalty coefficient, fingerprint signal is compensated, including:
When penalty coefficient includes the parameter index of front-end amplifier, by there is the front-end amplifier of penalty coefficient to finger
Stricture of vagina signal is amplified, and by analog-digital converter, the fingerprint signal after amplifying is carried out the fingerprint after analog digital conversion is compensated and believes
Number；
When penalty coefficient includes the parameter index of analog-digital converter, by front-end amplifier, fingerprint signal is put
Greatly, the fingerprint signal after amplifying is carried out the fingerprint after analog digital conversion is compensated by having the analog-digital converter of penalty coefficient
Signal.
Optionally, penalty coefficient includes at least one in filter function and signal amplification factor, and filter function is to finger
The function that stricture of vagina signal is filtered, amplification when signal amplification factor is to be amplified fingerprint signal.
Optionally, according to penalty coefficient, fingerprint signal is compensated, including:
When penalty coefficient includes filter function, by filter function, fingerprint signal is filtered the finger after being compensated
Stricture of vagina signal；
When penalty coefficient includes signal amplification factor, it is amplified being mended to fingerprint signal according to signal amplification factor
Fingerprint signal after repaying.
Optionally, determine the penalty coefficient that temperature signal is corresponding, including:
Corresponding relation is preset in inquiry, determines the penalty coefficient corresponding with temperature signal according to default corresponding relation, and it is right to preset
The corresponding relation including between temperature signal and penalty coefficient should be related to.
The third aspect according to disclosure embodiment, it is provided that a kind of fingerprint identification device, this device includes:
Processor；
For storing the memorizer of processor executable；
Wherein, processor is configured to:
Fingerprint signal is gathered by fingerprint sensor；
By temperature acquisition assembly collecting temperature signal；
Determine the penalty coefficient that temperature signal is corresponding；
According to penalty coefficient, fingerprint signal is compensated, and carry out fingerprint recognition according to the fingerprint signal after compensating.
Embodiment of the disclosure that the technical scheme of offer can include following beneficial effect:
It is electrically connected with fingerprint sensor and temperature acquisition assembly by chip will be processed, processes chip and can pass through fingerprint
Sensor acquisition fingerprint signal, by temperature acquisition assembly collecting temperature signal, processes chip and determines the benefit that temperature signal is corresponding
Repay coefficient, and according to determining that fingerprint signal is compensated by the penalty coefficient obtained, and carry out according to the fingerprint signal after compensating
Fingerprint recognition；Solve the identification error processing the fingerprint signal that chip causes in order to avoid ambient temperature, need constantly to adjust
Hardware parameter and Processing Algorithm multi collect fingerprint signal are identified, and cause longer the asking of process of whole fingerprint recognition
Topic；Directly can determine, according to current temperature signal, the penalty coefficient matched with Current Temperatures, according to really owing to processing chip
Fingerprint signal is compensated by the fixed penalty coefficient obtained, and according to after compensating and fingerprint signal carries out fingerprint recognition, reaches
Reduce the number of times that fingerprint signal gathers, simplify the process of fingerprint recognition, accelerate the effect of fingerprint recognition speed.
It should be appreciated that it is only exemplary that above general description and details hereinafter describe, can not be limited this
Open.
Accompanying drawing explanation
Accompanying drawing herein is merged in description and constitutes the part of this specification, it is shown that meet the enforcement of the disclosure
Example, and in description together for explaining the principle of the disclosure.
Fig. 1 is the structural representation according to a kind of terminal unit shown in an exemplary embodiment；
Fig. 2 is the structural representation according to a kind of temperature collection circuit shown in another exemplary embodiment；
Fig. 3 is the structural representation according to a kind of terminal unit shown in another exemplary embodiment；
Fig. 4 is the structural representation according to a kind of terminal unit shown in another exemplary embodiment；
Fig. 5 is the flow chart according to a kind of fingerprint identification method shown in an exemplary embodiment；
Fig. 6 is the flow chart according to a kind of fingerprint identification method shown in another exemplary embodiment.
Detailed description of the invention
Here will illustrate exemplary embodiment in detail, its example represents in the accompanying drawings.Explained below relates to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represents same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the disclosure.On the contrary, they are only with the most appended
The example of the apparatus and method that some aspects that described in detail in claims, the disclosure are consistent.
Fig. 1 is the structural representation according to a kind of terminal unit shown in an exemplary embodiment, as it is shown in figure 1, this is eventually
End equipment 10 includes: fingerprint sensor 110, temperature acquisition assembly 120 and process chip 130.
Process chip 130 to be electrically connected with fingerprint sensor 110 and temperature acquisition assembly 120 respectively.
Process chip 130, for gathering fingerprint signal by fingerprint sensor 110.
Process chip 130, be additionally operable to by temperature acquisition assembly 120 collecting temperature signal.
Process chip 130, be additionally operable to determine the penalty coefficient that temperature signal is corresponding.
Process chip 130, be additionally operable to according to penalty coefficient, fingerprint signal be compensated, and according to the fingerprint letter after compensating
Number generate fingerprint image.
In sum, the terminal unit that disclosure embodiment provides, by processing chip and fingerprint sensor and temperature
Acquisition component is electrically connected with, and processes chip and can gather fingerprint signal by fingerprint sensor, is gathered by temperature acquisition assembly
Temperature signal, processes chip and determines the penalty coefficient that temperature signal is corresponding, and according to determining that fingerprint is believed by the penalty coefficient obtained
Number compensate, and carry out fingerprint recognition according to the fingerprint signal after compensating；Solve process chip in order to avoid ambient temperature
The identification error of the fingerprint signal caused, needs constantly to adjust hardware parameter and Processing Algorithm and multi collect fingerprint signal is carried out
Identify, cause the problem that the process of whole fingerprint recognition is longer；Can be directly true according to current temperature signal owing to processing chip
The fixed penalty coefficient matched with Current Temperatures, according to determining that fingerprint signal is compensated by the penalty coefficient obtained, and according to
Fingerprint signal after compensation carries out fingerprint recognition, has reached to reduce the number of times that fingerprint signal gathers, has simplified the process of fingerprint recognition,
Accelerate the effect of fingerprint recognition speed.
Refer to the structural representation of the terminal unit shown in Fig. 1, this terminal unit 10 includes: fingerprint sensor 110, temperature
Degree acquisition component 120 and process chip 130.
Terminal unit 10 is such as mobile phone, panel computer, attendance recorder, intelligent lock, Wearable, e-book reading
Device, MP3 (Moving Picture Experts Group Audio Layer III, dynamic image expert's compression standard audio layer
Face 3) player, (Moving Picture Experts Group Audio Layer IV, dynamic image expert compresses mark to MP4
Quasi-audio frequency aspect 4) intelligent terminal of player etc, terminal unit 10 has fingerprint collecting and fingerprint identification function.
Process chip 130, for gathering fingerprint signal by fingerprint sensor 110.Optionally, fingerprint sensor 110 is
Optical fingerprint sensor, semicoductor capacitor sensor, quasiconductor pressure sensor, ultrasonic sensor and RF (Radio
Frequency, radio frequency) sensor etc..Fingerprint sensor 110 can be integrated in the terminal unit of mobile phone and panel computer etc
In button, when the finger of user contacts button, fingerprint sensor 110 gathers fingerprint signal.Fingerprint sensor 110 collects finger
After stricture of vagina signal, it is sent to fingerprint signal process chip 130.
Process chip 130, be additionally operable to by temperature acquisition assembly 120 collecting temperature signal.Optionally, temperature acquisition assembly
120 is temperature sensor or the thermo-sensitive material of such as thermocouple, critesistor and bimetal leaf etc, and such as, temperature is adopted
Temperature sensor in the button of the terminal unit that collection assembly 120 can be integrated in mobile phone and panel computer etc, or, it is
Being arranged on one layer of thermo-sensitive material of keytop, when the finger of user contacts button, temperature acquisition assembly 120 gathers user's hands
The temperature signal referred to, and be sent to the temperature signal collected process chip 130.
When actual realization, by being connected in temperature collection circuit realize temperature signal by temperature acquisition assembly 120
Collection, owing to the resistance value of temperature acquisition assembly 120 or other device parameters values can be according to the differences of the temperature value sensed
And different, and when temperature acquisition assembly 120 is connected in temperature collection circuit, the device parameters of temperature acquisition assembly 120
The difference of value also can make the output signal of temperature collection circuit different, therefore the device parameters value of temperature acquisition assembly 120 and ring
Corresponding relation is all there is between temperature value and the output signal of temperature collection circuit of border temperature, by this method can be by temperature
The temperature value that degree acquisition component 120 senses is converted into temperature signal and exports, it is achieved the collection to temperature signal, collects
Temperature signal and temperature value between there is corresponding relation.
The structure of a kind of temperature collection circuit in terminal unit 10 can be as in figure 2 it is shown, by temperature acquisition assembly 120 He
Fixed resistance R1Being separately positioned on the positive-negative input end of difference amplifier 201, positive-negative input end is inputted by difference amplifier 201
The voltage difference of voltage is amplified and is transferred to analog-digital converter (ADC) 202, after the amplification that analog-digital converter 202 will receive
Voltage difference be converted into digital signal, as the temperature signal collected, when the resistance of temperature acquisition assembly 120 changes
Time, the temperature signal of analog-digital converter 202 output also changes.It should be noted that the structure of the temperature collection circuit shown in Fig. 2
It is exemplary, the present embodiment reference voltage V+, the reference voltage V-of negative input end to positive input terminal, and fixed resistance R1
And R2Resistance value size be not construed as limiting.The structural representation of the terminal unit shown in Fig. 1 is shown without temperature acquisition assembly
The temperature collection circuit at 120 places.
Optionally, the signal output part of temperature collection circuit is electrically connected with processing chip 130, for being sent out by temperature signal
Give process chip 130；Or, temperature collection circuit is integrated in process chip 130.
Optionally, the terminal unit shown in Fig. 1 can also include: front-end amplifier 140 and analog-digital converter 150, then
The structural representation of terminal unit can be as shown in Figure 3.
Front-end amplifier 140 is electrically connected with fingerprint sensor 110, analog-digital converter 150 respectively with front-end amplifier 140
It is electrically connected with processing chip 130.Front-end amplifier 140 is put for the fingerprint signal collecting fingerprint sensor 110
Greatly, analog-digital converter 150 is for carrying out analog digital conversion to the fingerprint signal after front-end amplifier 140 amplifies, and will carry out mould
Fingerprint signal after number conversion is sent to process chip 130.
Optionally, (Central Processing Unit, central authorities process to process the CPU that chip 130 is terminal unit 10
Device) or fingerprint recognition IC (Integrated Circuit, integrated circuit).Owing to the disposal ability of fingerprint recognition IC is usual the most relatively
Weak, the process chip 130 in the present embodiment is the CPU of terminal unit 10 the most under normal circumstances, but when actual realization, if
The disposal ability of fingerprint recognition IC is relatively strong, then the process chip 130 can also being implemented as in the present embodiment by fingerprint recognition IC.
The present embodiment is as a example by processing the CPU that chip 130 is terminal unit 10.
Process chip 130, after receiving fingerprint signal and temperature signal, determines the penalty coefficient that temperature signal is corresponding.Place
Prestoring default corresponding relation in reason chip 130, default corresponding relation includes the corresponding pass between temperature signal with penalty coefficient
System, processes chip 130 inquiry and presets corresponding relation, determine the compensation system corresponding with temperature signal according to this default corresponding relation
Number, compensates fingerprint signal according to penalty coefficient, and carries out fingerprint recognition according to the fingerprint signal after compensating.Real in reality
Now, penalty coefficient is typically matrix coefficient.
Optionally, the difference of the content that chip 130 includes is processed according to penalty coefficient, it is possible to use in following two method
At least one fingerprint signal is compensated:
In the implementation that the first is possible, penalty coefficient includes that the parameter index of front-end amplifier 140 and modulus turn
At least one in the parameter index of parallel operation 150.The parameter index of front-end amplifier 140 at least includes front-end amplifier 140
Yield value, the parameter index of analog-digital converter 150 include the dynamic range of analog-digital converter 150, response frequency, response speed and
At least one of resolution.
When penalty coefficient includes the parameter index of front-end amplifier 140, process chip 130, for by having this benefit
The front-end amplifier 140 repaying coefficient is amplified the fingerprint signal after being amplified, by analog-digital converter 150 to fingerprint signal
Fingerprint signal after amplifying is carried out the fingerprint signal after analog digital conversion is compensated.
When penalty coefficient includes the parameter index of analog-digital converter, process chip 130, be used for passing through front-end amplifier
140 pairs of fingerprint signals are amplified the fingerprint signal after being amplified, right by having the analog-digital converter 150 of this penalty coefficient
Fingerprint signal after amplification carries out the fingerprint signal after analog digital conversion is compensated.
Write from memory it should be noted that each parameter index of front-end amplifier 140 and analog-digital converter 150 has one
Recognizing value, the parameter index not included in penalty coefficient can keep default value not change.
In an exemplary example, with the parameter index of front-end amplifier 140 as yield value, analog-digital converter 150
Parameter index be dynamic range and resolution, and penalty coefficient includes yield value and the analog-digital converter of front-end amplifier 140
As a example by the resolution of 150, it is assumed that the penalty coefficient corresponding with temperature signal is [10dB, 8bit], then this penalty coefficient represents
Implication can be the yield value of front-end amplifier be 10dB, the resolution of analog-digital converter is 8bit, then process chip 130 by front
The yield value of end amplifier 140 is set to 10dB, makes this front-end amplifier 140 be put by fingerprint signal according to this yield value
Greatly；The resolution of analog-digital converter 150 is set to 8bit, and the dynamic range simultaneously keeping analog-digital converter 150 is default value,
Make analog-digital converter 150, according to the resolution of 8bit and the dynamic range of acquiescence, the fingerprint signal after amplifying be carried out analog digital conversion
Fingerprint signal after being compensated.
Optionally, can also include wave filter in terminal unit 10, not shown in Fig. 3, wave filter amplifies with front end respectively
Device 140 and analog-digital converter 150 are electrically connected with, for filtering the noise signal in fingerprint signal.Then penalty coefficient can also wrap
Including the parameter index of wave filter, the parameter index of wave filter includes in filter response type, mid frequency and cut-off frequency extremely
Few one, wherein, filter response type includes at least in the response of the Butterwoth responds, Bezier and Chebyshev's response
Kind.
In the implementation that the second is possible, penalty coefficient includes at least in filter function and signal amplification factor
Kind, filter function is the function being filtered fingerprint signal, and signal amplification factor is put when being and be amplified fingerprint signal
Big multiple.
Then when penalty coefficient includes filter function, process chip 130, for fingerprint signal being carried out by filter function
Filter the fingerprint signal after being compensated.When actual realization, when penalty coefficient is filter function, penalty coefficient usually filter
The filter operator that wave function is corresponding, process chip 130 by penalty coefficient and fingerprint signal carried out convolution being compensated after
Fingerprint signal.
Optionally, filter function includes the filtering of mean filter, gaussian filtering, medium filtering, extreme value, smothing filtering and La Pu
At least one in the sharpening of Lars.
When penalty coefficient includes signal amplification factor, process chip 130, for fingerprint being believed according to signal amplification factor
Number it is amplified the fingerprint signal after being compensated.
In an exemplary example, penalty coefficient is Laplace operatorThen this penalty coefficient
Represent, with this Laplace operator, fingerprint signal is carried out laplacian spectral radius, then process chip 130 by by this penalty coefficient
The fingerprint signal after convolution is compensated is carried out with the fingerprint signal received.
Process at least one in using the implementation that above two is possible of chip 130 fingerprint signal is compensated
And after the fingerprint signal after being compensated, fingerprint recognition can be carried out, including following step according to the fingerprint signal after compensating
Rapid:
1, process chip 130 and generate fingerprint image, and the picture quality to fingerprint image according to the fingerprint signal after compensating
Being estimated, picture quality can include at least one in the intensity profile of fingerprint image, effective area and degrees of offset.
2, when the picture quality of fingerprint image is less than or equal to predetermined threshold, Resurvey fingerprint signal, wherein, predetermined threshold
Value can be systemic presupposition value or by User Defined, this is not construed as limiting by the present embodiment.
Terminal unit is when gathering the fingerprint of user, if the fingerprint portion of user's finger has the impurity such as water droplet and dust, or
Person's fingerprint portion exist cicatrix or abrasion time, terminal unit according to compensate after fingerprint signal generate fingerprint image quality still
Likely to be less than equal to predetermined threshold, now terminal unit Resurvey fingerprint signal.Optionally, fingerprint is gathered when terminal unit
When the number of times of signal is more than pre-determined number, terminal unit display reminding information, information is used for informing that user fingerprints identification is lost
Losing and user can be pointed out to change other fingers, pre-determined number is systemic presupposition value or by User Defined, the present embodiment is to this
It is not construed as limiting.
3, when fingerprint image picture quality more than predetermined threshold time, fingerprint image is carried out image segmentation, image enhaucament,
The Image semantic classification such as image binaryzation and image thinning.
4, extract the fingerprint characteristic in fingerprint image after Image semantic classification, fingerprint characteristic include fingerprint trend,
At least one in fingerprint breakpoint and fingerprint crossing point.
5, prestoring fingerprint characteristic storehouse in process chip 130, fingerprint characteristic storehouse includes several fingerprint characteristics, processes core
The fingerprint characteristic that extraction is obtained by sheet 130 mates with the fingerprint characteristic in the fingerprint characteristic storehouse prestored, when the finger extracted
When the similarity of a fingerprint characteristic in stricture of vagina feature and fingerprint characteristic storehouse is more than matching threshold, it is determined that these two fingerprint characteristics
Coupling, these two fingerprint characteristics, corresponding to the same finger of same user, otherwise determine that these two fingerprint signals do not mate,
Realizing the identification to fingerprint signal with this, wherein, matching threshold is systemic presupposition value or by User Defined, the present embodiment is to this
It is not construed as limiting.
It should be noted that based on the terminal unit shown in Fig. 1 or Fig. 3, terminal unit 10 can also including, fingerprint is known
Other IC 160, then the structural representation of terminal unit 10 can (front-end amplifier 140 and modulus not shown in Fig. 4 as shown in Figure 4
Transducer 150), fingerprint recognition IC 160 is electrically connected with fingerprint sensor 110 and temperature acquisition assembly 120, and fingerprint recognition
IC 160 is electrically connected with processing chip 130, and fingerprint recognition IC 160 is used for receiving fingerprint signal and temperature signal, and by fingerprint
Signal and temperature signal are sent to process chip 130.
In sum, the terminal unit that disclosure embodiment provides, by processing chip and fingerprint sensor and temperature
Acquisition component is electrically connected with, and processes chip and can gather fingerprint signal by fingerprint sensor, is gathered by temperature acquisition assembly
Temperature signal, processes chip and determines the penalty coefficient that temperature signal is corresponding, and according to determining that fingerprint is believed by the penalty coefficient obtained
Number compensate, and carry out fingerprint recognition according to the fingerprint signal after compensating；Solve process chip in order to avoid ambient temperature
The identification error of the fingerprint signal caused, needs constantly to adjust hardware parameter and Processing Algorithm and multi collect fingerprint signal is carried out
Identify, cause the problem that the process of whole fingerprint recognition is longer；Can be directly true according to current temperature signal owing to processing chip
The fixed penalty coefficient matched with Current Temperatures, according to determining that fingerprint signal is compensated by the penalty coefficient obtained, and according to
Fingerprint signal after compensation carries out fingerprint recognition, has reached to reduce the number of times that fingerprint signal gathers, has simplified the process of fingerprint recognition,
Accelerate the effect of fingerprint recognition speed.
The terminal unit that disclosure embodiment provides, processes chip and directly uses the penalty coefficient matched with Current Temperatures
Fingerprint signal is compensated, and carries out fingerprint recognition according to the fingerprint signal after compensating so that fingerprint signal is compensated
Time the hardware parameter that uses and Processing Algorithm more reasonable, so that the fingerprint image of the fingerprint signal generation after Bu Changing can have more
Good definition and signal to noise ratio.
Fig. 5 is the flow chart according to a kind of fingerprint identification method shown in an exemplary embodiment, and the method may be used for
In terminal unit as shown in Figure 1, the method includes following several step:
In step 501, fingerprint signal is gathered by fingerprint sensor.
In step 502, by temperature acquisition assembly collecting temperature signal.
It should be noted that step 501 and the most specific successively execution sequence of step 502, and when actual realization, step
Rapid 501 and step 502 be typically to perform simultaneously.
In step 503, the penalty coefficient that temperature signal is corresponding is determined.
In step 504, according to penalty coefficient, fingerprint signal is compensated, and carry out according to the fingerprint signal after compensating
Fingerprint recognition.
In sum, the fingerprint identification method that disclosure embodiment provides, by will process chip and fingerprint sensor and
Temperature acquisition assembly is electrically connected with, and processes chip and can gather fingerprint signal by fingerprint sensor, by temperature acquisition assembly
Collecting temperature signal, processes chip and determines the penalty coefficient that temperature signal is corresponding, and according to determining that the penalty coefficient obtained is to finger
Stricture of vagina signal compensates, and carries out fingerprint recognition according to the fingerprint signal after compensating；Solve process chip in order to avoid environment
The identification error of the fingerprint signal that temperature causes, needs constantly to adjust hardware parameter and Processing Algorithm multi collect fingerprint signal
It is identified, causes the problem that the process of whole fingerprint recognition is longer；Can directly believe according to Current Temperatures owing to processing chip
Number determine the penalty coefficient matched with Current Temperatures, according to determining that fingerprint signal is compensated by the penalty coefficient obtained, and
Carry out fingerprint recognition according to the fingerprint signal after compensating, reached to reduce the number of times that fingerprint signal gathers, simplified fingerprint recognition
Process, accelerates the effect of fingerprint recognition speed.
Fig. 6 is the flow chart according to a kind of fingerprint identification method shown in another exemplary embodiment, and the method can be used
In terminal unit as shown in Figure 2, the method includes following several step:
In step 601, process chip and gather fingerprint signal by fingerprint sensor.
In step 602, chip is processed by temperature acquisition assembly collecting temperature signal.
It should be noted that step 601 and the most specific successively execution sequence of step 602, and when actual realization, step
Rapid 601 and step 602 be typically to perform simultaneously.
In step 603, process chip inquiry and preset corresponding relation, determine and temperature signal according to this default corresponding relation
Corresponding penalty coefficient, default corresponding relation includes the corresponding relation between temperature signal and penalty coefficient.
Optionally, during penalty coefficient includes the parameter index of front-end amplifier and the parameter index of analog-digital converter at least
One, the parameter index of front-end amplifier at least includes the yield value of front-end amplifier, and the parameter index of analog-digital converter includes
At least one in the dynamic range of analog-digital converter, response frequency, response speed and resolution.
In step 604, process chip and according to penalty coefficient, fingerprint signal is compensated, and according to the fingerprint after compensating
Signal carries out fingerprint recognition.
When penalty coefficient includes the parameter index of front-end amplifier, process chip and put by having the front end of penalty coefficient
Big device is amplified the fingerprint signal after being amplified to fingerprint signal, is entered the fingerprint signal after amplifying by analog-digital converter
Row analog digital conversion be compensated after fingerprint signal；
When penalty coefficient includes the parameter index of analog-digital converter, process chip by front-end amplifier to fingerprint signal
It is amplified the fingerprint signal after being amplified, by having the analog-digital converter of penalty coefficient, the fingerprint signal after amplifying is entered
Row analog digital conversion be compensated after fingerprint signal.
Optionally, based in the fingerprint identification method shown in above-mentioned Fig. 6, in above-mentioned steps 603, process what chip determined
The penalty coefficient corresponding with temperature signal includes at least one in filter function and signal amplification factor, and filter function is to finger
The function that stricture of vagina signal is filtered, amplification when signal amplification factor is to be amplified fingerprint signal.
Then above-mentioned steps 604 can be implemented as:
When penalty coefficient includes filter function, process chip and be filtered being mended to fingerprint signal by filter function
Fingerprint signal after repaying；
When penalty coefficient includes signal amplification factor, process chip and according to signal amplification factor, fingerprint signal is put
Fingerprint signal after being compensated greatly.
In sum, the fingerprint identification method that disclosure embodiment provides, by will process chip and fingerprint sensor and
Temperature acquisition assembly is electrically connected with, and processes chip and can gather fingerprint signal by fingerprint sensor, by temperature acquisition assembly
Collecting temperature signal, processes chip and determines the penalty coefficient that temperature signal is corresponding, and according to determining that the penalty coefficient obtained is to finger
Stricture of vagina signal compensates, and carries out fingerprint recognition according to the fingerprint signal after compensating；Solve process chip in order to avoid environment
The identification error of the fingerprint signal that temperature causes, needs constantly to adjust hardware parameter and Processing Algorithm multi collect fingerprint signal
It is identified, causes the problem that the process of whole fingerprint recognition is longer；Can directly believe according to Current Temperatures owing to processing chip
Number determine the penalty coefficient matched with Current Temperatures, according to determining that fingerprint signal is compensated by the penalty coefficient obtained, and
Carry out fingerprint recognition according to the fingerprint signal after compensating, reached to reduce the number of times that fingerprint signal gathers, simplified fingerprint recognition
Process, accelerates the effect of fingerprint recognition speed.
Following for disclosure device embodiment, may be used for performing method of disclosure embodiment.Real for disclosure device
Execute the details not disclosed in example, refer to method of disclosure embodiment.
The disclosure one exemplary embodiment provides a kind of fingerprint identification device, it is possible to the fingerprint that realizing the disclosure provides is known
Other method, this device includes: processor, for storing the memorizer of processor executable；
Wherein, processor is configured to:
Fingerprint signal is gathered by fingerprint sensor；
By temperature acquisition assembly collecting temperature signal；
Determine the penalty coefficient that temperature signal is corresponding；
According to penalty coefficient, fingerprint signal is compensated, and carry out fingerprint recognition according to the fingerprint signal after compensating.
Those skilled in the art, after considering description and putting into practice invention disclosed herein, will readily occur to its of the disclosure
Its embodiment.The application is intended to any modification, purposes or the adaptations of the disclosure, these modification, purposes or
Person's adaptations is followed the general principle of the disclosure and includes the undocumented common knowledge in the art of the disclosure
Or conventional techniques means.Description and embodiments is considered only as exemplary, and the true scope of the disclosure and spirit are by following
Claim is pointed out.
It should be appreciated that the disclosure is not limited to precision architecture described above and illustrated in the accompanying drawings, and
And various modifications and changes can carried out without departing from the scope.The scope of the present disclosure is only limited by appended claim.
Claims (13)
1. a terminal unit, it is characterised in that described terminal unit includes: process chip, fingerprint sensor and temperature acquisition
Assembly, described process chip is electrically connected with described fingerprint sensor and described temperature acquisition assembly respectively；
Described process chip, for gathering fingerprint signal by described fingerprint sensor；
Described process chip, is additionally operable to by described temperature acquisition assembly collecting temperature signal；
Described process chip, is additionally operable to determine the penalty coefficient that described temperature signal is corresponding；
Described process chip, is additionally operable to compensate described fingerprint signal according to described penalty coefficient, and according to compensate after
Described fingerprint signal carries out fingerprint recognition.
Terminal unit the most according to claim 1, it is characterised in that described terminal unit also includes: pass with described fingerprint
The front-end amplifier that sensor is electrical connected, and, the modulus being electrical connected with described front-end amplifier and described process chip turns
Parallel operation；
Described penalty coefficient includes in the parameter index of described front-end amplifier and the parameter index of described analog-digital converter extremely
Few one, the parameter index of described front-end amplifier at least includes the yield value of described front-end amplifier, described analog-digital converter
Parameter index include at least one of the dynamic range of described analog-digital converter, response frequency, response speed and resolution.
Terminal unit the most according to claim 2, it is characterised in that described process chip, is additionally operable to:
When described penalty coefficient includes the parameter index of described front-end amplifier, by have described penalty coefficient described before
Described fingerprint signal is amplified by end amplifier, by described analog-digital converter, the described fingerprint signal after amplifying is carried out mould
Number conversion be compensated after described fingerprint signal；
When described penalty coefficient includes the parameter index of described analog-digital converter, by described front-end amplifier to described fingerprint
Signal is amplified, and by having the described analog-digital converter of described penalty coefficient, the described fingerprint signal after amplifying is carried out mould
Number conversion be compensated after described fingerprint signal.
Terminal unit the most according to claim 1, it is characterised in that
Described penalty coefficient includes that at least one in filter function and signal amplification factor, described filter function are to described finger
The function that stricture of vagina signal is filtered, amplification when described signal amplification factor is to be amplified described fingerprint signal.
Terminal unit the most according to claim 4, it is characterised in that described process chip, is additionally operable to:
When described penalty coefficient includes described filter function, by described filter function, described fingerprint signal is filtered
Described fingerprint signal after compensation；
When described penalty coefficient includes described signal amplification factor, according to described signal amplification factor, described fingerprint signal is entered
Row amplifies the described fingerprint signal after being compensated.
6. according to the arbitrary described terminal unit of claim 1 to 5, it is characterised in that
Described process chip, is additionally operable to inquire about default corresponding relation, determines according to described default corresponding relation and believes with described temperature
Number corresponding described penalty coefficient, described default corresponding relation includes the corresponding relation between temperature signal and penalty coefficient.
7. a fingerprint identification method, it is characterised in that described method is in terminal unit, and described terminal unit includes: institute
State process chip, fingerprint sensor and temperature acquisition assembly, described process chip respectively with described fingerprint sensor and described temperature
Degree acquisition component is electrically connected with, and described method includes:
Fingerprint signal is gathered by described fingerprint sensor；
By described temperature acquisition assembly collecting temperature signal；
Determine the penalty coefficient that described temperature signal is corresponding；
According to described penalty coefficient, described fingerprint signal is compensated, and carry out fingerprint according to the described fingerprint signal after compensating
Identify.
Method the most according to claim 7, it is characterised in that described terminal unit also includes: with described fingerprint sensor
The front-end amplifier being electrical connected, and, the analog-digital converter being electrical connected with described front-end amplifier and described process chip；
Described penalty coefficient includes in the parameter index of described front-end amplifier and the parameter index of described analog-digital converter extremely
Few one, the parameter index of described front-end amplifier at least includes the yield value of described front-end amplifier, described analog-digital converter
Parameter index include at least one in the dynamic range of described analog-digital converter, response frequency, response speed and resolution.
Method the most according to claim 8, it is characterised in that described according to described penalty coefficient, described fingerprint signal is entered
Row compensates, including:
When described penalty coefficient includes the parameter index of described front-end amplifier, by have described penalty coefficient described before
Described fingerprint signal is amplified by end amplifier, by described analog-digital converter, the described fingerprint signal after amplifying is carried out mould
Number conversion be compensated after described fingerprint signal；
When described penalty coefficient includes the parameter index of described analog-digital converter, by described front-end amplifier to described fingerprint
Signal is amplified, and by having the described analog-digital converter of described penalty coefficient, the described fingerprint signal after amplifying is carried out mould
Number conversion be compensated after described fingerprint signal.
Method the most according to claim 7, it is characterised in that
Described penalty coefficient includes that at least one in filter function and signal amplification factor, described filter function are to described finger
The function that stricture of vagina signal is filtered, amplification when described signal amplification factor is to be amplified described fingerprint signal.
11. methods according to claim 10, it is characterised in that described according to described penalty coefficient to described fingerprint signal
Compensate, including:
When described penalty coefficient includes described filter function, by described filter function, described fingerprint signal is filtered
Described fingerprint signal after compensation；
When described penalty coefficient includes described signal amplification factor, according to described signal amplification factor, described fingerprint signal is entered
Row amplifies the described fingerprint signal after being compensated.
12. according to the arbitrary described method of claim 7 to 11, it is characterised in that described determine that described temperature signal is corresponding
Penalty coefficient, including:
Corresponding relation is preset in inquiry, determines the described compensation system corresponding with described temperature signal according to described default corresponding relation
Number, described default corresponding relation includes the corresponding relation between temperature signal and penalty coefficient.
13. 1 kinds of fingerprint identification devices, it is characterised in that described device includes:
Processor；
For storing the memorizer of described processor executable；
Wherein, described processor is configured to:
Fingerprint signal is gathered by fingerprint sensor；
By temperature acquisition assembly collecting temperature signal；
Determine the penalty coefficient that described temperature signal is corresponding；
According to described penalty coefficient, described fingerprint signal is compensated, and carry out fingerprint according to the described fingerprint signal after compensating
Identify.
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| CN201610511640.8A CN106203301A (en) | 2016-06-30 | 2016-06-30 | Terminal unit, fingerprint identification method and device |
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| CN201610511640.8A CN106203301A (en) | 2016-06-30 | 2016-06-30 | Terminal unit, fingerprint identification method and device |
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| CN107463925A (en) * | 2017-09-11 | 2017-12-12 | 信利光电股份有限公司 | A kind of fingerprint recognition module, electronic equipment |
| CN110287922A (en) * | 2019-06-29 | 2019-09-27 | Oppo广东移动通信有限公司 | Fingerprint identification method and Related product |
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| CN111079863A (en) * | 2019-12-31 | 2020-04-28 | 重庆青信科技有限公司 | System for utilizing energy spectrum curve statistics fingerprint identification focus tissue |
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| CN112699863A (en) * | 2021-03-25 | 2021-04-23 | 深圳阜时科技有限公司 | Fingerprint enhancement algorithm, computer-readable storage medium and electronic device |
| CN115311695A (en) * | 2022-09-16 | 2022-11-08 | 深圳市汇顶科技股份有限公司 | Ultrasonic fingerprint identification method, ultrasonic fingerprint device and electronic equipment |
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