CN105335707B - A kind of acquisition methods, device and the mobile terminal of fingerprint image to be identified - Google Patents
A kind of acquisition methods, device and the mobile terminal of fingerprint image to be identified Download PDFInfo
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- CN105335707B CN105335707B CN201510681138.7A CN201510681138A CN105335707B CN 105335707 B CN105335707 B CN 105335707B CN 201510681138 A CN201510681138 A CN 201510681138A CN 105335707 B CN105335707 B CN 105335707B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 238000001704 evaporation Methods 0.000 claims description 10
- 230000008020 evaporation Effects 0.000 claims description 10
- 210000004243 sweat Anatomy 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000004519 grease Substances 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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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
- 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
- G06V40/13—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
- G06V40/1347—Preprocessing; Feature extraction
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- Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
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- Image Input (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Collating Specific Patterns (AREA)
Abstract
The embodiment of the invention discloses a kind of acquisition methods, device and the mobile terminal of fingerprint image to be identified.This method includes：When monitoring fingerprint recognition event, fingerprint image is obtained by fingerprint sensor；Judge whether the clarity of fingerprint image reaches preset standard, if not, the fingerprint sensor is then controlled to heat up, and continue to obtain fingerprint image by fingerprint sensor, reach the fingerprint image of preset standard until getting clarity, clarity is reached into the fingerprint image of preset standard as fingerprint image to be identified.The embodiment of the present invention is by using above-mentioned technical proposal, when user carries out fingerprint input, if finger or fingerprint sensor surface speckle with the liquid such as water, sweat or grease, the clarity of fingerprint image can cannot reach preset standard because of the presence of aforesaid liquid, at this time, by controlling fingerprint sensor heating to be evaporated come accelerating liquid, the clarity of fingerprint image can be improved, and then improve the success rate of fingerprint recognition.
Description
Technical field
The present embodiments relate to fingerprint identification technology field, more particularly to a kind of acquisition side of fingerprint image to be identified
Method, device and mobile terminal.
Background technology
Since the biological characteristics such as fingerprint have the characteristics such as unchangeable property, uniqueness and convenience, so based on biology
The authentication mode security performance of feature is high, has been widely used at present.
For the mobile terminal such as mobile phone and tablet computer, user would generally carry with, and can store wherein
The substantial amounts of data for being related to individual privacy and property safety, therefore, the security of mobile terminal is particularly important.Fingerprint recognition
Technology mature, possesses higher stability and reliability, so, it has been generally integrated fingerprint in present mobile terminal
Sensor, for the scene for needing fingerprint to authenticate, such as unlock of terminal unlocking, application program and fingerprint pay scene.
However, user inevitably runs into finger or fingerprint sensor table when carrying out fingerprint authentication using finger
Face speckles with the situation of the liquid such as water, sweat or grease, and the fingerprint lines of the fingerprint image at this moment got is unintelligible, if should
Fingerprint image is matched as fingerprint image to be identified with fingerprint template, be may result in fingerprint matching and is gone wrong, and influences to use
The normal use at family.
The content of the invention
The purpose of the embodiment of the present invention is to propose a kind of acquisition methods, device and the mobile terminal of fingerprint image to be identified,
To solve in existing fingerprinting scheme, when speckling with liquid on fingerprint sensor surface, clearly finger to be identified can not be obtained
The problem of print image.
In a first aspect, an embodiment of the present invention provides a kind of acquisition methods of fingerprint image to be identified, including：
When monitoring fingerprint recognition event, fingerprint image is obtained by fingerprint sensor；
Judge whether the clarity of the fingerprint image reaches preset standard, if it is not, then controlling the fingerprint sensor liter
Temperature, and acquisition fingerprint image is continued by the fingerprint sensor, the finger of the preset standard is reached until getting clarity
Print image, reaches the fingerprint image of the preset standard as fingerprint image to be identified using the clarity.
Second aspect, an embodiment of the present invention provides a kind of device for lifting fingerprint recognition rate, including：
Fingerprint image acquisition module, for when monitoring fingerprint recognition event, fingerprint image to be obtained by fingerprint sensor
Picture；
Whether definition judgment module, the clarity for judging the fingerprint image reach preset standard；
Heat up control module, for when it is not up to preset standard to judge the clarity of the fingerprint image, control institute
State fingerprint sensor heating；
Fingerprint image determining module to be identified, for when controlling the fingerprint sensor heating, being passed by the fingerprint
Sensor continues to obtain fingerprint image, the fingerprint image of the preset standard is reached until getting clarity, by the clarity
Reach the fingerprint image of the preset standard as fingerprint image to be identified.
The third aspect, an embodiment of the present invention provides a kind of mobile terminal, including the finger to be identified in the embodiment of the present invention
The acquisition device of print image.
The acquisition scheme of the fingerprint image to be identified provided in the embodiment of the present invention, when monitoring fingerprint recognition event,
Fingerprint image is obtained by fingerprint sensor, judges whether the clarity of fingerprint image reaches preset standard, if it is not, then control refers to
Line sensor heats up, and continues acquisition fingerprint image by fingerprint sensor, reaches preset standard until getting clarity
Fingerprint image, reaches the fingerprint image of preset standard as fingerprint image to be identified using clarity.By using above-mentioned technical side
Case, when the finger of user, which is contacted with fingerprint sensor, carries out fingerprint input, if finger or fingerprint sensor surface speckle with water,
The liquid such as sweat or grease, then the clarity of fingerprint image can cannot reach preset standard because of the presence of aforesaid liquid, this
When, by controlling fingerprint sensor heating to be evaporated come accelerating liquid, the clarity of fingerprint image can be improved, passes through fingerprint sensor
Continue to obtain fingerprint image, the fingerprint image of preset standard is reached until getting clarity, clarity is reached into preset standard
Fingerprint image as fingerprint image to be identified.Then, fingerprint image to be identified can be used for fingerprint recognition, so as to improve fingerprint
The success rate of identification, lifts user experience.
Brief description of the drawings
Fig. 1 is a kind of flow diagram of the acquisition methods for fingerprint image to be identified that the embodiment of the present invention one provides；
Fig. 2 is a kind of flow diagram of the acquisition methods of fingerprint image to be identified provided by Embodiment 2 of the present invention；
Fig. 3 is a kind of structure diagram of the acquisition device for fingerprint image to be identified that the embodiment of the present invention three provides.
Embodiment
Further illustrate technical scheme below with reference to the accompanying drawings and specific embodiments.It is appreciated that
It is that specific embodiment described herein is used only for explaining the present invention, rather than limitation of the invention.Further need exist for illustrating
, for the ease of description, part related to the present invention rather than entire infrastructure are illustrate only in attached drawing.
It should be mentioned that some exemplary embodiments are described as before exemplary embodiment is discussed in greater detail
The processing described as flow chart or method.Although each step is described as the processing of order, many of which by flow chart
Step can be implemented concurrently, concomitantly or at the same time.In addition, the order of each step can be rearranged.When its operation
The processing can be terminated during completion, it is also possible to the additional step being not included in attached drawing.The processing can be with
Corresponding to method, function, code, subroutine, subprogram etc..
Embodiment one
Fig. 1 is a kind of flow diagram of the acquisition methods for fingerprint image to be identified that the embodiment of the present invention one provides, should
Method can be performed by the acquisition device of fingerprint image to be identified, and wherein the device can generally may be used by software and/or hardware realization
Integrate in the terminal.As shown in Figure 1, this method includes：
Step 101, when monitoring fingerprint recognition event, fingerprint image is obtained by fingerprint sensor.
It is exemplary, the mobile terminal in the present embodiment be concretely configured with the mobile phone of fingerprint sensor, intelligent watch,
The equipment such as tablet computer and laptop.Skilled person will appreciate that perform the device of the present embodiment the method not
It is confined to be integrated in mobile terminal, can be also integrated in equipped with other electricity such as the desktop computer of fingerprint sensor or punched-card machine
In sub- equipment, it is the embodiment of the present invention because caused beneficial effect is more obvious to be generally integrated in mobile terminal
Only illustrated exemplified by being integrated in mobile terminal.
Exemplary, the fingerprint recognition event concretely terminal unlocking, application program unlock and fingerprint payment etc.
Need the scene of progress fingerprint recognition.
Exemplary, after fingerprint recognition event occurs, user can make to press with finger fingerprint sensor, make fingerprint sensor
Obtain fingerprint image.Fingerprint sensor mainly includes optical fingerprint sensor and semiconductor fingerprint sensor, is obtaining fingerprint image
During picture, these fingerprint sensors are both needed to depend on the rough lines of finger surface fingerprint, when the finger surface of user speckles with
The liquid such as water, sweat or grease, or fingerprint sensor surface can all influence the fingerprint image got in itself there are during liquid
The clarity of picture, so as to be easy to cause fingerprint recognition failure.It should be noted that due to when obtaining fingerprint image, finger watch
Face is contacted with fingerprint sensor surface, and liquid is present between finger surface and fingerprint sensor surface, so it is believed that liquid
Both it is present in finger surface, exists in fingerprint sensor surface, describes for convenience, only there are liquid with finger surface below
To represent the above situation.Illustrated below by taking the capacitive fingerprint sensing device in semiconductor fingerprint sensor as an example, finger watch
Skin on face can form capacitance with fingerprint sensor, since finger surface is rough and uneven in surface, be passed at salient point and with fingerprint at concave point
The actual range size of sensor is with regard to different, and the capacitance of formation is also just different, after handling the capacitance collected
Obtain fingerprint image.When finger surface is there are during liquid, liquid can cause the capacitance inaccuracy collected, so as to cause fingerprint
Image obscures.
Step 102, judge whether the clarity of fingerprint image reaches preset standard, if it is not, then controlling fingerprint sensor liter
Temperature, and acquisition fingerprint image is continued by fingerprint sensor, the fingerprint image of preset standard is reached until getting clarity, will
Clarity reaches the fingerprint image of preset standard as fingerprint image to be identified.
Exemplary, the picture quality of fingerprint image of this step to getting is weighed, so as to judge its clarity
Whether preset standard is reached.The preset standard corresponds in the case of user's finger is correct, and fingerprint image can successfully pass
The condition of fingerprint recognition, those skilled in the art can determine the fingerprint sensor pair of actual use by experiment or theoretical calculation
The preset standard answered.
Judge that the mode whether clarity of fingerprint image reaches preset standard there can be many kinds.Common fingerprint sensing
The fingerprint image that device is got is gray-scale map, enumerates several judgment modes by taking fingerprint image is gray-scale map as an example below.For example, can
The average value of the gray value of all pixels point in fingerprint image is calculated, when average value is less than default average value, determines fingerprint image
The clarity of picture is not up to preset standard, because average value is smaller, illustrates that fingerprint image at this time is more shallow, is unfavorable for identifying；Also
The variance yields of the gray value of all pixels point in fingerprint image can be calculated, when variance yields is less than default variance yields, determines fingerprint
The clarity of image is not up to preset standard, because variance yields is smaller, illustrates that the difference between the gray value of different pixels point is got over
Small, fingerprint image is fuzzyyer, can not identify at the salient point of fingerprint and at concave point；Gray value in fingerprint image can be also calculated to exceed
Whether the number of the pixel of default gray value is within preset range, if not, it is determined that the clarity of fingerprint image is not up to
Preset standard.Further, in order to improve the accuracy of judgement, the gray scale of all pixels point in fingerprint image can be also calculated at the same time
The average value and variance yields of value, when average value very little, variance very little, explanatory drawin picture is close in vain, clarity is not up to pre- bidding entirely
Standard, finger surface are likely to have greasy dirt；When average value is very big, variance very little, for explanatory drawin picture close to completely black, clarity is not up to pre-
Bidding is accurate, and finger surface is likely to have water or sweat；When average value is very big, variance is very big, the image for illustrating this when be compared with
Alright, easy to identifying, it is believed that clarity has reached preset standard.
It is exemplary, when the clarity for judging fingerprint image is not up to preset standard, illustrate finger surface there may be
Liquid, then control fingerprint sensor heating.The mode of control fingerprint sensor heating has many kinds, such as, it is possible to increase fingerprint passes
The power of sensor, so that fingerprint sensor heats up；Or the corresponding heater element of control fingerprint sensor to fingerprint sensor into
Row heating, so that fingerprint sensor heats up.Wherein, the power for increasing fingerprint sensor can be by increasing the electric current of fingerprint sensor
Value or yield value.The heater element concretely electrothermal device, such as heating wire, electric hot plate, ribbon heater and Electrothermal ring
Deng may be provided at side or the surrounding of fingerprint sensor.The present embodiment is in place to the particular type of heater element, size and institute
Put and be not especially limited, those skilled in the art can make choice and design according to practical situations.In control fingerprint sensing
When device heats up, it is contemplated that people is more sensitive to temperature, and the maximum temperature of controllable fingerprint sensor, which is less than, can allow user to feel boiling hot
The temperature of hand.
Fingerprint sensor heating is controlled, the liquid evaporation of finger surface can be accelerated, so that it is clear to fingerprint image to weaken liquid
The influence of clear degree.At this time, it can continue to obtain fingerprint image by fingerprint sensor, reach preset standard until getting clarity
Fingerprint image, clarity is reached into the fingerprint image of preset standard as fingerprint image to be identified.Fingerprint sensor this start
During heating, it is contemplated that liquid may not start evaporation or evaporation capacity is smaller, can be between the certain time after starting to warm up
Every afterwards, (such as 1 second) is further continued for obtaining fingerprint image.The frequency for obtaining fingerprint image is not especially limited, exemplary, can be set
Be set to 2 times it is per second.When having obtained fingerprint image every time, judge whether the clarity of this fingerprint image obtained reaches pre- bidding
Standard, if not up to, continuing to obtain fingerprint image；If having reached, using this fingerprint image as fingerprint image to be identified, and
Stop obtaining fingerprint image.
The acquisition methods for the fingerprint image to be identified that the embodiment of the present invention one provides, when monitoring fingerprint recognition event,
Fingerprint image is obtained by fingerprint sensor, judges whether the clarity of fingerprint image reaches preset standard, if it is not, then control refers to
Line sensor heats up, and continues acquisition fingerprint image by fingerprint sensor, reaches preset standard until getting clarity
Fingerprint image, reaches the fingerprint image of preset standard as fingerprint image to be identified using clarity.By using above-mentioned technical side
Case, when the finger of user, which is contacted with fingerprint sensor, carries out fingerprint input, if finger or fingerprint sensor surface speckle with water,
The liquid such as sweat or grease, then the clarity of fingerprint image can cannot reach preset standard because of the presence of aforesaid liquid, this
When, by controlling fingerprint sensor heating to be evaporated come accelerating liquid, the clarity of fingerprint image can be improved, passes through fingerprint sensor
Continue to obtain fingerprint image, the fingerprint image of preset standard is reached until getting clarity, clarity is reached into preset standard
Fingerprint image as fingerprint image to be identified.Then, fingerprint image to be identified can be used for fingerprint recognition, so as to improve fingerprint
The success rate of identification, lifts user experience.
Embodiment two
Fig. 2 is a kind of flow diagram of the acquisition methods of fingerprint image to be identified provided by Embodiment 2 of the present invention, this
Embodiment optimizes the process of control fingerprint sensor heating based on above-described embodiment.
Correspondingly, the method for the present embodiment includes the following steps：
Step 201, when monitoring fingerprint recognition event, fingerprint image is obtained by fingerprint sensor.
Step 202, judge whether the clarity of fingerprint image reaches preset standard, if so, then performing step 210；Otherwise,
Perform step 203.
Exemplary, if user's finger does not speckle with liquid, then the clarity of the fingerprint image obtained first generally can
Reach preset standard, step 210 can be performed at this time, the fingerprint image that will be obtained first is gone forward side by side as fingerprint image to be identified
The follow-up fingerprint recognition relevant operation of row, specific identification process can be identical with existing identification process, and therefore not to repeat here.It is if first
The clarity of the fingerprint image of secondary acquisition is not up to preset standard, then performs step 203, that is, controls fingerprint sensor to start to rise
Temperature.
Step 203, control fingerprint sensor start to warm up.
Exemplary, it can start to increase the power of fingerprint sensor, or start to heat fingerprint sensor.
Step 204, continue acquisition fingerprint image by sensor.
After fingerprint sensor starts to warm up, liquid can be accelerated to evaporate, and can obtain fingerprint image again.
Step 205, judge whether the clarity of this fingerprint image reaches preset standard, if so, then performing step 210；
Otherwise, step 206 is performed.
Step 206, judge whether fingerprint sensor has currently stopped heating up, and step 204 is performed if so, then returning；Otherwise,
Perform step 207.
Exemplary, when performing this step first, fingerprint sensor does not stop generally heating up；At second and more times
When performing this step, it is likely that met the condition for stopping heating, fingerprint sensor stops heating, at this time, can directly return
Step 204 is performed to continue to obtain fingerprint image.
Step 207, control fingerprint sensor continue to heat up, and the fingerprint image for determining to obtain in preset duration is clear
The variation tendency of degree, performs step 208；
Exemplary, the preset duration can be adjusted according to actual use situation, for example, may be configured as 2 seconds or
It is longer.
Step 208, determine whether stopping heating according to variation tendency, if so, then performing step 209；Otherwise, return and perform
Step 204.
Determine whether that a variety of implementations can be had by stopping heating, be exemplified below three kinds of sides therein according to variation tendency
Formula：
1st, when variation tendency for when remaining constant, stopping heats up.The variation tendency of clarity is to remain constant,
Illustrate that the reason for temperature rise does not influence on clarity, causes clarity not reach preset standard may not be that finger surface is deposited
In liquid, so can stop heating up.
2nd, when variation tendency differs preset range to rise to apart from preset standard, heating is stopped.When clarity approaches
During preset standard, it can stop heating up, make fast liquid evaporation by residual temperature, so that clarity reaches preset standard.Wherein,
Preset range can be adjusted according to practical situations.For example, the variance yields with the gray value of all pixels point in fingerprint image
To weigh clarity, when variance yields is more than A, illustrate to reach preset standard, preset range can arrive A-a for 0, and (wherein, A is more than a, a
Occurrence can be adjusted according to practical situations), in other words, when variance yields is more than a, can stop heating up.
3rd, when variation tendency is less than default changing value for amplitude of variation, heating is stopped.When the variation tendency of clarity is
When changing slower and slower, illustrate that clarity can be less than certain value close to preset standard, its amplitude of variation, can be true by the value
It is set to default changing value.After stopping heating, fast liquid evaporation can be made by residual temperature, so that clarity reaches pre- bidding
It is accurate.
Step 209, control fingerprint sensor stop heating, return and perform step 204.
Exemplary, it can stop increasing the power of fingerprint sensor, or stop heating for fingerprint sensor.
Clarity, is reached the fingerprint image of preset standard as fingerprint image to be identified by step 210, by images to be recognized
It is compared with preset fingerprint template, determines whether fingerprint recognition succeeds according to comparison result.
Exemplary, if after fingerprint image to be identified is obtained, detect that control fingerprint sensor does not stop heating up,
Fingerprint sensor can be also further controlled to stop heating.
The acquisition methods of fingerprint image to be identified provided by Embodiment 2 of the present invention, on the basis of embodiment one, are being controlled
After fingerprint sensor processed starts to warm up, the variation tendency of the clarity of the fingerprint image obtained in preset duration, and root are determined
Judge whether to control fingerprint sensor to stop heating according to variation tendency, clearly fingerprint image purpose to be identified can be obtained reaching
On the basis of, system power dissipation is saved, lifts user experience.
Embodiment three
A kind of structure diagram of the acquisition device for fingerprint image to be identified that Fig. 3 provides for the embodiment of the present invention three, the dress
Put and can be typically integrated in by software and/or hardware realization in mobile equipment, can be by performing the acquisition side of fingerprint image to be identified
Method obtains fingerprint image to be identified.As shown in figure 3, the device includes fingerprint image acquisition module 301, definition judgment module
302nd, heat up control module 303 and fingerprint image determining module 304 to be identified.
Wherein, fingerprint image acquisition module 301, for when monitoring fingerprint recognition event, being obtained by fingerprint sensor
Fetching print image；Whether definition judgment module 302, the clarity for judging the fingerprint image reach preset standard；Rise
Warm control module 303, for when it is not up to preset standard to judge the clarity of the fingerprint image, controlling the fingerprint to pass
Sensor heats up；Fingerprint image determining module 304 to be identified, for when controlling the fingerprint sensor heating, passing through the finger
Line sensor continues to obtain fingerprint image, and the fingerprint image of the preset standard is reached until getting clarity, will be described clear
The clear fingerprint image for reaching the preset standard of spending is as fingerprint image to be identified.
On the basis of above-described embodiment, the definition judgment module, can be specifically used for：Calculate in the fingerprint image
The average value of the gray value of all pixels point, when the average value is less than default average value, determines the clear of the fingerprint image
Clear degree is not up to preset standard；Alternatively, the variance yields of the gray value of all pixels point in the fingerprint image is calculated, as the side
When difference is less than default variance yields, determine that the clarity of the fingerprint image is not up to preset standard.
On the basis of above-described embodiment, the heating control module, can be specifically used for：Increase the fingerprint sensor
Power, so that the fingerprint sensor heats up；Alternatively, the corresponding heater element of the fingerprint sensor is controlled to pass the fingerprint
Sensor is heated, so that the fingerprint sensor heats up.
On the basis of above-described embodiment, the heating control module may include：Variation tendency determination unit and heating stop
Stop element.Wherein, variation tendency determination unit, for while fingerprint sensor heating is controlled, determining when default
The variation tendency of the clarity of the fingerprint image obtained in long；Heat up stop element, is for being determined according to the variation tendency
It is no to stop heating.
On the basis of above-described embodiment, the heating stop element, can be specifically used for：When the variation tendency is all the time
When remaining unchanged, stop heating；Alternatively, when the variation tendency differs preset range to rise to apart from the preset standard
When, stop heating；Alternatively, when the variation tendency is less than default changing value for amplitude of variation, stop heating.
On the basis of above-described embodiment, which may also include：Fingerprint identification module, for by the images to be recognized
It is compared with preset fingerprint template, determines whether fingerprint recognition succeeds according to comparison result.
Example IV
The present embodiment four provides a kind of mobile terminal, which includes to be identified described in the embodiment of the present invention
The acquisition device of fingerprint image, can obtain fingerprint image to be identified by performing the acquisition methods of fingerprint image to be identified.
It is exemplary, the mobile terminal in the present embodiment be concretely configured with the mobile phone of fingerprint sensor, intelligent watch,
The terminal such as tablet computer and laptop.
Mobile terminal of the user in using the present embodiment carries out the terminal unlocking based on fingerprint recognition, application program unlock
Or fingerprint is paid when action, if finger or fingerprint sensor surface speckle with liquid, mobile terminal will be by controlling fingerprint
Sensor heating carrys out accelerating liquid evaporation, can improve the clarity of fingerprint image, so as to improve the success rate of fingerprint recognition, is lifted
User experience.
The said goods can perform the method that any embodiment of the present invention is provided, and possess the corresponding function module of execution method
And beneficial effect.Not ins and outs of detailed description in the present embodiment, reference can be made to the side that any embodiment of the present invention is provided
Method.
Note that it above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
It can include other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (5)
- A kind of 1. acquisition methods of fingerprint image to be identified, it is characterised in that including：When monitoring fingerprint recognition event, fingerprint image is obtained by fingerprint sensor, the fingerprint sensor is configured at movement In terminal；Judge whether the clarity of the fingerprint image reaches preset standard, if it is not, then control fingerprint sensor heating with Accelerate the liquid evaporation between finger surface and the fingerprint sensor surface, and acquisition is continued by the fingerprint sensor and is referred to Print image, the fingerprint image of the preset standard is reached until getting clarity, and the clarity is reached the pre- bidding Accurate fingerprint image is as fingerprint image to be identified；Wherein, whether the clarity for judging the fingerprint image reaches preset standard, including：The average value and variance yields of the gray value of all pixels point in the fingerprint image are calculated, is preset when the average value is less than During average value or when the variance yields is less than default variance yields, the not up to pre- bidding of clarity of the fingerprint image is determined It is accurate；The control fingerprint sensor heating, including：Increase the power of the fingerprint sensor by way of the yield value for increasing fingerprint sensor, so that the fingerprint sensing Device heats up；While the fingerprint sensor heating is controlled, further include：Determine the variation tendency of the clarity of the fingerprint image obtained in preset duration；When the variation tendency differs preset range to rise to apart from the preset standard, stop heating, with by residual temperature To make liquid evaporation, clarity is set to reach preset standard.
- 2. according to the method described in claim 1, it is characterized in that, the clarity is being reached to the fingerprint of the preset standard After image is as fingerprint image to be identified, further include：The images to be recognized is compared with preset fingerprint template, determines whether fingerprint recognition succeeds according to comparison result.
- A kind of 3. acquisition device of fingerprint image to be identified, it is characterised in that including：Fingerprint image acquisition module, for when monitoring fingerprint recognition event, fingerprint image, institute to be obtained by fingerprint sensor Fingerprint sensor is stated to be configured in mobile terminal；Whether definition judgment module, the clarity for judging the fingerprint image reach preset standard；Heat up control module, for when it is not up to preset standard to judge the clarity of the fingerprint image, controlling the finger Line sensor heats up to accelerate the liquid evaporation between finger surface and the fingerprint sensor surface；Fingerprint image determining module to be identified, for when controlling the fingerprint sensor heating, passing through the fingerprint sensor Continue to obtain fingerprint image, the fingerprint image of the preset standard is reached until getting clarity, the clarity is reached The fingerprint image of the preset standard is as fingerprint image to be identified；Wherein, the definition judgment module, is specifically used for：The average value and variance yields of the gray value of all pixels point in the fingerprint image are calculated, is preset when the average value is less than During average value or when the variance yields is less than default variance yields, the not up to pre- bidding of clarity of the fingerprint image is determined It is accurate；The heating control module, is specifically used for：Increase the power of the fingerprint sensor by way of the yield value for increasing fingerprint sensor, so that the fingerprint sensing Device heats up；The heating control module includes：Variation tendency determination unit, for while the fingerprint sensor heating is controlled, determining to obtain in preset duration Fingerprint image clarity variation tendency；Heat up stop element, for when the variation tendency differs preset range to rise to apart from the preset standard, stopping Only heat up, to make liquid evaporation by residual temperature, clarity is reached preset standard.
- 4. device according to claim 3, it is characterised in that further include：Fingerprint identification module, for the images to be recognized to be compared with preset fingerprint template, determines according to comparison result Whether fingerprint recognition succeeds.
- 5. a kind of mobile terminal, it is characterised in that include the acquisition of claim 3-4 any one of them fingerprint image to be identified Device.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510681138.7A CN105335707B (en) | 2015-10-19 | 2015-10-19 | A kind of acquisition methods, device and the mobile terminal of fingerprint image to be identified |
| CN201810286246.8A CN108764015B (en) | 2015-10-19 | 2015-10-19 | Method and device for acquiring fingerprint image to be identified and mobile terminal |
| PCT/CN2016/091800 WO2017067256A1 (en) | 2015-10-19 | 2016-07-26 | Method and device for acquiring fingerprint image to be recognized and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510681138.7A CN105335707B (en) | 2015-10-19 | 2015-10-19 | A kind of acquisition methods, device and the mobile terminal of fingerprint image to be identified |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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| CN201810286246.8A Expired - Fee Related CN108764015B (en) | 2015-10-19 | 2015-10-19 | Method and device for acquiring fingerprint image to be identified and mobile terminal |
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| CN105335707B (en) * | 2015-10-19 | 2018-05-08 | 广东欧珀移动通信有限公司 | A kind of acquisition methods, device and the mobile terminal of fingerprint image to be identified |
| CN105760736B (en) * | 2016-02-19 | 2018-09-07 | 北京奇虎科技有限公司 | The method and tripper of application program unlock |
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| CN105760021B (en) * | 2016-03-17 | 2018-09-28 | 周奇 | A kind of method and apparatus that pressure is obtained by fingerprint collecting |
| US20190087636A1 (en) * | 2016-03-25 | 2019-03-21 | Microsoft Technology Licensing, Llc | Communication of fingerprint data |
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| CN106503628A (en) * | 2016-09-30 | 2017-03-15 | 北京小米移动软件有限公司 | method and device for fingerprint matching |
| CN106407952A (en) * | 2016-09-30 | 2017-02-15 | 北京小米移动软件有限公司 | Fingerprint entry method and device |
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| CN107992800A (en) * | 2017-11-10 | 2018-05-04 | 杭州晟元数据安全技术股份有限公司 | A kind of fingerprint image quality determination methods based on SVM and random forest |
| CN108460371A (en) * | 2018-04-16 | 2018-08-28 | 北京中天维科技有限公司 | A kind of fingerprint sensor acquisition system and method |
| CN108764103A (en) * | 2018-05-22 | 2018-11-06 | 上海思立微电子科技有限公司 | Fingerprint identification method, optical finger print identification module and electronic equipment |
| CN113239817A (en) * | 2019-02-20 | 2021-08-10 | Oppo广东移动通信有限公司 | Fingerprint template acquisition method and related device |
| CN110070081A (en) * | 2019-03-13 | 2019-07-30 | 深圳壹账通智能科技有限公司 | Automatic information input method, device, storage medium and electronic equipment |
| CN109993149B (en) * | 2019-04-12 | 2021-10-26 | 京东方科技集团股份有限公司 | Terminal, display panel and fingerprint identification module |
| CN110378198A (en) * | 2019-05-30 | 2019-10-25 | 华为技术有限公司 | Fingerprint identification method and intelligent terminal |
| CN110674691A (en) * | 2019-08-22 | 2020-01-10 | 联想图像（天津）科技有限公司 | Fingerprint identification and verification method and device and printing equipment |
| CN111027424B (en) * | 2019-11-28 | 2023-04-07 | 深圳市迪安杰智能识别科技有限公司 | Fingerprint acquisition device and method and intelligent door lock |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2017067256A1 (en) | 2017-04-27 |
| CN105335707A (en) | 2016-02-17 |
| CN108764015B (en) | 2021-03-02 |
| CN108764015A (en) | 2018-11-06 |
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