CN106250890A - A kind of fingerprint identification method and device - Google Patents
A kind of fingerprint identification method and device Download PDFInfo
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- CN106250890A CN106250890A CN201610846389.0A CN201610846389A CN106250890A CN 106250890 A CN106250890 A CN 106250890A CN 201610846389 A CN201610846389 A CN 201610846389A CN 106250890 A CN106250890 A CN 106250890A
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- Prior art keywords
- fingerprint
- lines
- target
- sweat pore
- destination object
- Prior art date
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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
- G06V40/1382—Detecting the live character of the finger, i.e. distinguishing from a fake or cadaver finger
- G06V40/1388—Detecting the live character of the finger, i.e. distinguishing from a fake or cadaver finger using image processing
Abstract
The embodiment of the invention discloses a kind of fingerprint identification method and device.Wherein, the method includes: fingerprint identification device can gather fingerprint image for destination object, determines target fingerprint lines, and judge whether there is sweat pore in this target fingerprint lines from this fingerprint image, if there is sweat pore, it is determined that the fingerprint of this destination object is fingerprint live body；If there is no sweat pore, it is determined that the fingerprint of this destination object is fingerprint prosthese.By the embodiment of the present invention, fingerprint identification device can identify the sweat pore in fingerprint image, and identifies the true and false of fingerprint according to whether there is sweat pore in fingerprint image, such that it is able to accurately identify true and false fingerprint, improves the safety of fingerprint recognition.
Description
Technical field
The present invention relates to technical field of biometric identification, be specifically related to a kind of fingerprint identification method and device.
Background technology
Fingerprint refers to the recessed uneven streakline produced of the finger tips positive surface skin epirelief of user, fingerprint recognition i.e. refer to by than
The details of more different fingerprints differentiates.Owing to the fingerprint of different user is different, therefore fingerprint can be used for identity mirror
Fixed.At present, fingerprint recognition is in access control and attendance, electricity business's transaction, financial transaction, PC, the security of mobile phone and settlement system
It is used widely.
Along with the development of fingerprint identification technology, fingerprint identification device is the most outstanding on convenience and correctness, but equally
There is the mistake authentication question of false fingerprint.The paper of the false general useful printing of fingerprint or film production, the most useful silica gel or rubber
Making, its lines is roughly the same with the lines of true fingerprint, and therefore, existing fingerprint identification technology is difficult to identify true and false fingerprint.
Therefore, identify that true and false fingerprint has become problem demanding prompt solution the most accurately.
Summary of the invention
The embodiment of the invention discloses a kind of fingerprint identification method and device, it is possible to identify the true and false of fingerprint accurately, from
And improve the safety of fingerprint recognition.
The embodiment of the invention discloses a kind of fingerprint identification method, the method may include that
Gather fingerprint image for destination object, and from described fingerprint image, determine target fingerprint lines；
Judge whether described target fingerprint lines exists sweat pore；
If there is described sweat pore, determine that the fingerprint of described destination object is fingerprint live body；
If there is no described sweat pore, determine that the fingerprint of described destination object is fingerprint prosthese.
Accordingly, the embodiment of the invention discloses a kind of fingerprint identification device, this device may include that
Collecting unit, for gathering fingerprint image for destination object；
First determines unit, for determining target fingerprint lines from described fingerprint image；
Judging unit, is used for judging whether there is sweat pore in described target fingerprint lines；
Second determines unit, for judging that described target fingerprint lines exists described sweat pore at described judging unit
Time, determine that the fingerprint of described destination object is fingerprint live body；
Described second determines unit, is additionally operable to judge that described target fingerprint lines does not exist at described judging unit described
During sweat pore, determine that the fingerprint of described destination object is fingerprint prosthese.
Implement the embodiment of the present invention, have the advantages that
In the embodiment of the present invention, fingerprint identification device can gather fingerprint image for destination object, from this fingerprint image
In determine target fingerprint lines, and judge whether this target fingerprint lines exists sweat pore, if there is sweat pore, it is determined that
The fingerprint of this destination object is fingerprint live body；If there is no sweat pore, it is determined that the fingerprint of this destination object is fingerprint prosthese.
By the embodiment of the present invention, fingerprint identification device can identify the sweat pore in fingerprint image, and according in fingerprint image whether
There is sweat pore to identify the true and false of fingerprint, such that it is able to accurately identify true and false fingerprint, improve the safety of fingerprint recognition.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, in embodiment being described below required for make
Accompanying drawing be briefly described, it should be apparent that, below describe in accompanying drawing be only some embodiments of the present invention, for
From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the schematic flow sheet of a kind of fingerprint identification method disclosed in the embodiment of the present invention；
Fig. 2 is fingerprint image disclosed in the embodiment of the present invention；
Fig. 3 is the gray-scale figure of a kind of target fingerprint lines tangent plane disclosed in the embodiment of the present invention；
Fig. 4 is the schematic flow sheet of another kind of fingerprint identification method disclosed in the embodiment of the present invention；
Fig. 5 is the structural representation of a kind of fingerprint identification device disclosed in the embodiment of the present invention；
Fig. 6 is the structural representation of another kind of fingerprint identification device disclosed in the embodiment of the present invention；
Fig. 7 is the structural representation of a kind of fingerprint identification device disclosed in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
The embodiment of the invention discloses a kind of fingerprint identification method and device.The true and false of fingerprint can be identified accurately, from
And improve the safety of fingerprint recognition.It is described in detail individually below.
Referring to Fig. 1, Fig. 1 is the schematic flow sheet of a kind of fingerprint identification method disclosed in the embodiment of the present invention.Wherein, figure
Method shown in 1 can apply to access control and attendance system, electricity business's transaction system, financial transaction system, smart mobile phone (as
Android phone, iOS mobile phone etc.), panel computer, palm PC, personal digital assistant (Personal Digital
Assistant, PDA), mobile internet device (Mobile Internet Device, MID) and Intelligent worn device etc. eventually
The security of end equipment and settlement system etc..As it is shown in figure 1, this fingerprint identification method may comprise steps of:
101, fingerprint identification device gathers fingerprint image for destination object, and determines target fingerprint from this fingerprint image
Lines.
In the embodiment of the present invention, target fingerprint lines is any one lines in fingerprint image, and this destination object is permissible
User, it is also possible to be the finger of user or other there is the object of fingerprint lines, the embodiment of the present invention does not limits.Fingerprint
Identify that device can carry out fingerprint collecting by fingerprint sensor to destination object, and capture the fingerprint image of a frame.Now, adopt
Including a plurality of fingerprint lines in the fingerprint image of collection, fingerprint identification device only need to arbitrarily determine a fingerprint lines just.As
Shown in Fig. 2, Fig. 2 is fingerprint image disclosed in the embodiment of the present invention, in fig. 2 it is possible to find out that this fingerprint image is by many clearly
Bar fingerprint lines forms.
102, whether fingerprint identification device exists sweat pore in judging this target fingerprint lines, if so, performs step 103；
If it is not, perform step 104.
In the embodiment of the present invention, fingerprint identification device, can be at described target fingerprint stricture of vagina after determining target fingerprint lines
Road is searched sweat pore, if target fingerprint lines exists sweat pore, then may determine that this fingerprint is true, if target fingerprint
Lines does not exist sweat pore, then illustrates that this fingerprint is false.
Further, whether to there is the concrete mode of sweat pore in judging this target fingerprint lines permissible for fingerprint identification device
For:
Obtain the gray-scale figure of target fingerprint lines tangent plane, and determine the characteristic information of this gray-scale figure；
Judge whether this feature information mates with default characteristic information；
If this feature information is mated with default characteristic information, special according to the target in this gray-scale figure of this feature information searching
Levy a little, and this target characteristic point is defined as sweat pore.
In implementing, fingerprint identification device, after determining target fingerprint lines, can be chosen on target fingerprint lines and appoint
Meaning a bit, centered by this point, first intercepts a tangent plane with any direction, calculates the GTG of all positions on this tangent plane
Value, and depict the gray-scale figure of this tangent plane, as it is shown on figure 3, Fig. 3 is that disclosed in the embodiment of the present invention, a kind of target fingerprint lines is cut
The gray-scale figure in face.Gray-scale figure is made up of the grey decision-making on tangent plane, and fingerprint identification device may determine that the feature letter of this gray-scale figure
Breath.Wherein, this feature information may refer to the tendency of line between grey decision-making, as formed the straight line of a level, forms one
Curve (gray-scale figure as shown in Figure 3) as " mountain valley " or " mountain peak ", composition wave, or composition one tilt or
Vertical straight line etc., the embodiment of the present invention does not limits.
Further, fingerprint identification device, after determining the characteristic information of this gray-scale figure, can determine whether this feature
Whether information mates with default characteristic information, if it does, fingerprint identification device is searched in gray-scale figure further according to characteristic information
Target characteristic point, and this target characteristic point is defined as the sweat pore of user's finger.Concrete, this default characteristic information can be
Line between each grey decision-making is the curve as " mountain valley " or " mountain peak ".The characteristic information of this gray-scale figure is believed with default feature
Breath mates it is to be understood that the line between each grey decision-making is the curve as " mountain valley " or " mountain peak " in gray-scale figure.
Therefore, if the characteristic information of gray-scale figure mates with default characteristic information, fingerprint identification device can search this ash
Target characteristic point in the figure of rank.If the characteristic information of gray-scale figure is the line between each grey decision-making is the song as " mountain valley "
Line, then this target characteristic point specifically refers to the minimum point in this gray-scale figure；If the characteristic information of gray-scale figure is each grey decision-making
Between line be the curve as " mountain peak ", then this target characteristic point specifically refers to the peak in this gray-scale figure.
If it should be noted that the characteristic information of gray-scale figure does not mates with default characteristic information, then fingerprint recognition fills
Put and again can obtain with tangent plane after rotating to an angle with this tangent plane as initial surface centered by current point, thus continue to paint
Make the gray-scale figure of this tangent plane, until the characteristic information of gray-scale figure mates with default characteristic information.
Further, if after current rotation turnback, characteristic information and default characteristic information being still not found
The gray-scale figure joined, then fingerprint identification device then can find subsequent point near this point, repeats above-mentioned judgement.If target refers to
Gray-scale figure that characteristic information with default characteristic information mate all is not found in stricture of vagina lines, then shows target fingerprint lines is not deposited
At sweat pore.
103, fingerprint identification device determines that the fingerprint of this destination object is fingerprint live body.
In the embodiment of the present invention, when fingerprint identification device exists sweat pore in judging this target fingerprint lines, then say
The fingerprint that this fingerprint image bright is corresponding is true fingerprint, can determine that the fingerprint of this destination object is that fingerprint is lived to a certain extent
Body.
104, fingerprint identification device determines that the fingerprint of this destination object is fingerprint prosthese.
In the embodiment of the present invention, when fingerprint identification device does not exists sweat pore in judging this target fingerprint lines, then
Illustrate that the fingerprint that this fingerprint image is corresponding is false fingerprint, can determine that the fingerprint of this destination object is that fingerprint is false to a certain extent
Body.
For example, if user needs to enter strong-room, by the Fingerprint Model of silica gel making in order to carry out finger print identifying,
Although fingerprint identification device identifies authority corresponding to this fingerprint can enter strong-room, it is apparent that can not be at any one fingerprint
Finding sweat pore in lines, fingerprint identification device may thereby determine that this fingerprint is false fingerprint, thus the certification to this fingerprint
Failure.
Visible, in the method described by Fig. 1, fingerprint identification device, can after collecting the fingerprint image of destination object
To determine any one fingerprint lines from fingerprint image, and judge whether this fingerprint lines exists sweat pore, if there is
Sweat pore, then show that the fingerprint of destination object is fingerprint live body, if there is no sweat pore, then shows that the fingerprint of destination object is
Fingerprint prosthese.By the embodiment of the present invention, fingerprint identification device can identify the sweat pore in fingerprint image, and according to fingerprint image
Whether there is sweat pore in Xiang to identify the true and false of fingerprint, such that it is able to fingerprint of distinguishing the true from the false accurately, improve fingerprint recognition
Safety.
Referring to Fig. 4, Fig. 4 is the schematic flow sheet of another kind of fingerprint identification method disclosed in the embodiment of the present invention.Such as Fig. 4
Shown in, this fingerprint identification method may comprise steps of:
401, fingerprint identification device gathers fingerprint image for destination object, and determines target fingerprint from this fingerprint image
Lines.
In the embodiment of the present invention, target fingerprint lines is any one lines in fingerprint image, and the embodiment of the present invention is not
Limit.
402, fingerprint identification device obtains the lines width of this target fingerprint lines, and judges that whether this lines width is in advance
If in width range, if so, perform step 403；If it is not, perform step 407.
In the embodiment of the present invention, predetermined width may range from 400um～600um, and the embodiment of the present invention does not limits.Refer to
Stricture of vagina identification device, after determining target fingerprint lines, can obtain the gray-scale figure of target fingerprint lines tangent plane.As in figure 2 it is shown, one
In the case of as, the gray-scale figure of a fingerprint lines tangent plane, the grey decision-making at its two ends is lower than the grey decision-making by mid portion, be because of
Position representated by two ends in gray-scale figure is the space between two fingerprint lines.Therefore, fingerprint identification device is obtaining mesh
After the gray-scale figure of mark fingerprint lines tangent plane, determine the lines width of target fingerprint lines according to the position corresponding to two ends in gray-scale figure
Degree.
Concrete, fingerprint identification device determines the lines of target fingerprint lines according to the position corresponding to two ends in gray-scale figure
Width, it is to be understood that fingerprint identification device is obtaining after gray-scale figure, needs to judge the company between each grey decision-making in this gray-scale figure
Line is the most symmetrical, such as point centered by the centre position of this line, apart from the basic phase of grey decision-making of this central point identical 2
With, if this line is symmetrical, then the tangent plane that this tangent plane is the ridge orientation being perpendicular to target fingerprint lines is described, then can be really
Make in gray-scale figure the point corresponding to grey decision-making at line two ends and be the gap between two fingerprint lines, such that it is able to meter
Calculating the distance between 2, this distance is the lines width of this target fingerprint lines.
Under normal circumstances, the lines width of the fingerprint lines of normal person is between 400um～600um, then fingerprint recognition
Device is after determining the lines width of target fingerprint lines, it can be determined that this lines width the most within the range, if at this
In the range of, fingerprint identification device the most only must judge whether there is sweat pore in this target fingerprint lines, if not at this model
In enclosing, then illustrate that the fingerprint of this destination object is false fingerprint.
In the embodiment of the present invention, under normal circumstances, the width of each the fingerprint lines of each user is at certain model
In enclosing, although false fingerprint out is substantially the same with the lines of true fingerprint as made by silica gel or rubber, but it is not excluded for fingerprint
The inappropriate situation of lines width, therefore, increases the judgement to fingerprint lines width, can improve the standard to true and false fingerprint recognition
Exactness, thus improve the safety of fingerprint recognition.
403, whether fingerprint identification device exists sweat pore in judging this target fingerprint lines, if so, performs step 404；
If it is not, perform step 407.
In the embodiment of the present invention, the mode present invention same as the previously described embodiments of fingerprint identification device identification sweat pore implements
Example does not repeats them here.
404, fingerprint identification device determines the ridge orientation of target fingerprint lines, and refers to along this ridge orientation lookup target
Sweat pore in stricture of vagina lines.
In the embodiment of the present invention, fingerprint identification device determines the ridge orientation of target fingerprint lines, particularly as follows: obtain target
The gray-scale figure of fingerprint lines tangent plane, and determine the characteristic information of this gray-scale figure；Judge that this feature information with default characteristic information is
No coupling；If this feature information is mated with default characteristic information, then by this tangent plane place straight line in target fingerprint lines
The direction of normal is defined as the ridge orientation of this target fingerprint lines.Normal i.e. refers to be perpendicular to this tangent plane in target fingerprint lines
The straight line of place straight line.
Further, fingerprint identification device, can be along this stricture of vagina after the ridge orientation determining this target fingerprint lines
The sweat pore in this target fingerprint lines is searched in direction, road, and records the quantity of sweat pore, and concrete lookup mode refers to step
102。
Optionally, all sweat pores during fingerprint identification device can be to look for target fingerprint lines, it is also possible to be to look into
On the basis of first sweat pore found, searching 5 and above sweat pore continuously, the embodiment of the present invention does not limits.
Whether the quantity of the sweat pore during 405, fingerprint identification device judges this target fingerprint lines exceedes predetermined number threshold
Value, if so, performs step 406；If it is not, perform step 407.
In the embodiment of the present invention, predetermined number threshold value can be 5, it is also possible to is 7, it is also possible to is 10, the present invention
Embodiment does not limits.Fingerprint identification device, after the sweat pore finding out target fingerprint lines along ridge orientation, can be sentenced
Whether the quantity of the sweat pore in this target fingerprint lines disconnected exceedes predetermined number threshold value, if it exceeds predetermined number threshold value, then
Illustrate to exist continuous print sweat pore to a certain extent on the ridge orientation of target fingerprint lines, then the finger of this destination object
Stricture of vagina may determine that as fingerprint live body.If the quantity of the sweat pore in this target fingerprint lines is not less than predetermined number threshold value, then
Illustrate not exist continuous print sweat pore to a certain extent on the ridge orientation of target fingerprint lines, then this destination object
Fingerprint may determine that as fingerprint prosthese.
In the embodiment of the present invention, increase the judgement to sweat pore quantity, can avoid owing to occurring during fingerprint collecting
Other impurity and cause the generation that there is the occasionality of target characteristic point in tangent plane gray-scale figure, such that it is able to reduce to true and false fingerprint
The situation of erroneous judgement.
As a kind of feasible embodiment, the quantity of fingerprint identification device sweat pore in determining target fingerprint lines
After exceeding predetermined number threshold value, it is also possible to operation below performing:
Obtain the spacing between any two adjacent sweat pores；
Judge that this spacing is whether in the range of preset pitch；
If in the range of preset pitch, it is determined that the fingerprint of this destination object is fingerprint live body；
If not in the range of preset pitch, it is determined that the fingerprint of this destination object is fingerprint prosthese.
In implementing, preset pitch may range from 150um～350um, and the embodiment of the present invention is with the sweat gland of common people
Pitch of holes is as reference, but preset pitch scope is not limited by the embodiment of the present invention.Therefore, judging when fingerprint identification device
Go out after the quantity of the sweat pore in target fingerprint lines exceedes predetermined number threshold value, a sweat pore can be arbitrarily determined, and calculate
Distance between this sweat pore with adjacent sweat pore, if this distance is in spacing range set in advance, then illustrates this target
The fingerprint of object is fingerprint live body, if it was not then illustrate that the fingerprint of this destination object is fingerprint prosthese.
In the embodiment of the present invention, increase the judgement to the spacing of sweat pore and can improve the accuracy of fingerprint recognition, thus
Improve the safety of fingerprint recognition.
It is of course also possible to there are special circumstances, i.e. the spacing of the sweat pore of the fingerprint lines of active user is not the most in advance
In the spacing range set, in this case, fingerprint identification device can prestore the sweat gland of finger corresponding to true fingerprint
The spacing in hole, then when identifying the feature of this fingerprint lines with the characteristic matching of fingerprint lines in data base, obtains data
The spacing of the sweat pore that fingerprint lines is corresponding in storehouse, thus determine whether the spacing of the sweat pore of the fingerprint lines currently obtained
Whether mate with the data of storage in data base, and whether in allowing the range of error existed, if it does, then determine that this refers to
Stricture of vagina is fingerprint live body.
406, fingerprint identification device determines that the fingerprint of this destination object is fingerprint live body.
407, fingerprint identification device determines that the fingerprint of this destination object is fingerprint prosthese.
As the embodiment that another kind is feasible, fingerprint identification device is fingerprint prosthese at the fingerprint identifying destination object
Time, it is also possible to output early warning, to point out this fingerprint as prosthese.
For example, some Bank Insurance systems need to be obtained the authority entering strong-room by fingerprint recognition, if
Offender makes a prosthetic finger, then fingerprint identification device after fingerprint recognition is passed through, i.e. identify this fingerprint have into
After the authority in storehouse that insures, it is possible to be determined by the mode that whether there is sweat pore in fingerprint lines true and false to carry out fingerprint
Distinguish.If fingerprint recognition is not passed through by this fingerprint identification device, or judge this fingerprint lines does not exist sweat pore, then
Fingerprint identification device can send early warning, hidden in safety with presenting bank staff or Public Security Organs's safety inventory
Suffer from.Bank clerk or Public Security Organs, after receiving this early warning, can take corresponding safeguard procedures, ensure wealth
The safety produced.
Visible, in the method described by Fig. 4, fingerprint identification device can identify the sweat pore in fingerprint image, and root
According to whether fingerprint image existing sweat pore to identify the true and false of fingerprint.Further, the embodiment of the present invention increases fingerprint stricture of vagina
The width on road, the judgement of the distance etc. between the quantity of sweat pore, sweat pore, it is possible to reduce the error that true and false fingerprint judges, from
And accuracy and the safety of fingerprint recognition can be improved.
Referring to Fig. 5, Fig. 5 is the structural representation of a kind of fingerprint identification device disclosed in the embodiment of the present invention.Such as Fig. 5 institute
Showing, this fingerprint identification device 500 can include with lower unit:
Collecting unit 501, for gathering fingerprint image for destination object.
First determines unit 502, for determining target fingerprint lines from this fingerprint image.Wherein, this target fingerprint stricture of vagina
Road is any one lines in fingerprint image.
Judging unit 503, is used for judging whether there is sweat pore in this target fingerprint lines.
Second determines unit 504, in time there is sweat pore in judging unit 503 judges this target fingerprint lines,
The fingerprint determining this destination object is fingerprint live body.Or, do not exist in judging unit 503 judges this target fingerprint lines
During sweat pore, determine that the fingerprint of this destination object is fingerprint prosthese.
In the embodiment of the present invention, fingerprint identification device 500 can identify the sweat pore in fingerprint image, and according to fingerprint image
Whether there is sweat pore in Xiang to identify the true and false of fingerprint, such that it is able to fingerprint of distinguishing the true from the false accurately, improve fingerprint recognition
Safety.
Concrete, it is judged that unit 503 judges that the concrete mode that whether there is sweat pore in this target fingerprint lines can be:
Obtain the gray-scale figure of target fingerprint lines tangent plane, and determine the characteristic information of this gray-scale figure；
Judge whether this feature information mates with default characteristic information；
If this feature information is mated with default characteristic information, whether exist according in this gray-scale figure of this feature infomation detection
Target characteristic point；
If there is target characteristic point, this target characteristic point is defined as sweat pore.
Wherein, this feature information may refer to the tendency of line between grey decision-making, as formed the straight line of a level, and composition
Article one, the curve (gray-scale figure as shown in Figure 3) as " mountain valley " or " mountain peak ", forms wave, or one inclination of composition
Or vertical straight line etc., the embodiment of the present invention does not limits.This default characteristic information can be the line between each grey decision-making
For the curve as " mountain valley " or " mountain peak ".
See also the structural representation that Fig. 6, Fig. 6 are the embodiment of the present invention another fingerprint identification devices disclosed.Its
In, the fingerprint identification device 500 described by Fig. 6 is to optimize to obtain on the basis of the fingerprint identification device 500 described by Fig. 5
's.As shown in Figure 6, this fingerprint identification device 500 can also include acquiring unit 505, search unit 506, wherein, acquiring unit
505 can perform the operation in claims performed by the first acquiring unit and second acquisition unit:
Acquiring unit 505, for obtaining the lines width of this target fingerprint lines.
Judging unit 503, be additionally operable to judge this lines width whether in the range of predetermined width, if this lines width is not
In the range of predetermined width, trigger second and determine that unit 504 determines that the fingerprint of this destination object is fingerprint prosthese.If this lines
Width, in the range of predetermined width, further judges whether there is sweat pore in this target fingerprint lines.
Wherein, predetermined width may range from 400um～600um, and the embodiment of the present invention does not limits.
As a kind of feasible embodiment, first determines unit 502, is additionally operable to judge this mesh at judging unit 503
When mark fingerprint lines exists sweat pore, determine the ridge orientation of target fingerprint lines.
Search unit 506, for searching the sweat pore in target fingerprint lines along this ridge orientation.
Judging unit 503, is additionally operable to judge whether the quantity of the sweat pore in this target fingerprint lines exceedes predetermined number
Threshold value, if this quantity exceedes predetermined number threshold value, triggers second and determines that unit 504 determines that the fingerprint of this destination object is fingerprint
Live body, if this quantity is not less than predetermined number threshold value, triggers second and determines that unit 504 determines that the fingerprint of this destination object is for referring to
Stricture of vagina prosthese.
Wherein, predetermined number threshold value can be 5, it is also possible to is 7, it is also possible to being 10, the embodiment of the present invention is not done
Limit.First determines that unit 502 determines that the ridge orientation of target fingerprint lines is specifically as follows: obtain target fingerprint lines tangent plane
Gray-scale figure, and determine the characteristic information of this gray-scale figure；Judge whether this feature information mates with default characteristic information；If should
Characteristic information mates with default characteristic information, then determined in this tangent plane direction of the normal of place straight line in target fingerprint lines
Ridge orientation for this target fingerprint lines.
As the embodiment that another kind is feasible, acquiring unit 505, it is additionally operable to judge this quantity at judging unit 503
When exceeding predetermined number threshold value, obtain the spacing of any two adjacent sweat pores.
Judging unit 503, be additionally operable to judge this spacing whether in the range of preset pitch, if this spacing is at preset pitch
In the range of, trigger second and determine that unit 504 determines that the fingerprint of this destination object is fingerprint live body, if this spacing is not between presetting
In the range of away from, trigger second and determine that unit 504 determines that the fingerprint of this destination object is fingerprint prosthese.
Wherein, this preset pitch may range from 150um～350um, between the embodiment of the present invention is with the sweat pore of common people
Away from as reference, but preset pitch scope is not limited by the embodiment of the present invention.
Visible, in the fingerprint identification device described by Fig. 5 and Fig. 6, fingerprint identification device can identify in fingerprint image
Sweat pore, and identify the true and false of fingerprint according to whether fingerprint image exists sweat pore.Further, the embodiment of the present invention
Increase the width to fingerprint lines, the judgement of the distance etc. between the quantity of sweat pore, sweat pore, it is possible to reduce true and false fingerprint is sentenced
Fixed error, such that it is able to improve accuracy and the safety of fingerprint recognition.
Refer to the structural representation that Fig. 7, Fig. 7 are fingerprint identification devices disclosed in the embodiment of the present invention.Wherein, Fig. 7 institute
The fingerprint identification device 700 shown may include that one or more processor 701, one or more input equipments 702, one or
Multiple outut devices 703 and memorizer 704.Above-mentioned processor 701, input equipment 702, outut device 703 and memorizer pass through
Bus 705 connects.Memorizer 705 is used for storing instruction, and processor 701 language performs the instruction of memorizer 702 storage.Its
In:
Input equipment 702, for gathering fingerprint image for destination object.
Whether processor 701, for determining target fingerprint lines from this fingerprint image, it is judged that in this target fingerprint lines
There is sweat pore, if this target fingerprint lines exists sweat pore, determine that the fingerprint of this destination object is fingerprint live body, if
There is not sweat pore in this target fingerprint lines, determine that the fingerprint of this destination object is fingerprint prosthese.
Wherein, this target fingerprint lines is any one lines in fingerprint image.
As a kind of feasible embodiment, processor 701 judges whether there is sweat pore in this target fingerprint lines
Concrete mode can be:
Obtain the gray-scale figure of target fingerprint lines tangent plane, and determine the characteristic information of this gray-scale figure；
Judge whether this feature information mates with default characteristic information；
If this feature information is mated with default characteristic information, whether exist according in this gray-scale figure of this feature infomation detection
Target characteristic point；
If there is target characteristic point, this target characteristic point is defined as sweat pore.
Wherein, this feature information may refer to the tendency of line between grey decision-making, as formed the straight line of a level, and composition
Article one, the curve (gray-scale figure as shown in Figure 3) as " mountain valley " or " mountain peak ", forms wave, or one inclination of composition
Or vertical straight line etc., the embodiment of the present invention does not limits.This default characteristic information can be the line between each grey decision-making
For the curve as " mountain valley " or " mountain peak ".
As the embodiment that another kind is feasible, processor 701, it is additionally operable to obtain the lines width of this target fingerprint lines
Degree, and judge that this lines width, whether in the range of predetermined width, if this lines width is not in the range of predetermined width, determines
The fingerprint of this destination object is fingerprint prosthese, if this lines width is in the range of predetermined width, is determining whether this target
Whether fingerprint lines exists sweat pore.
Wherein, predetermined width may range from 400um～600um, and the embodiment of the present invention does not limits.
As the embodiment that another is feasible, processor 701, it is additionally operable to there is sweat pore in this target fingerprint lines
Time, determine the ridge orientation of target fingerprint lines, and search the sweat pore in target fingerprint lines along this ridge orientation, it is judged that
Whether the quantity of the sweat pore in this target fingerprint lines exceedes predetermined number threshold value, if this quantity exceedes predetermined number threshold
Value, determines that the fingerprint of this destination object is fingerprint live body, if this quantity is not less than predetermined number threshold value, determines this destination object
Fingerprint be fingerprint prosthese.
Wherein, predetermined number threshold value can be 5, it is also possible to is 7, it is also possible to being 10, the embodiment of the present invention is not done
Limit.Processor 701 determines that the ridge orientation of target fingerprint lines is specifically as follows: obtain the GTG of target fingerprint lines tangent plane
Figure, and determine the characteristic information of this gray-scale figure；Judge whether this feature information mates with default characteristic information；If this feature is believed
Breath mates with default characteristic information, then this tangent plane direction of the normal of place straight line in target fingerprint lines is defined as this mesh
The ridge orientation of mark fingerprint lines.
As the embodiment that another is feasible, processor 701, it is additionally operable to when this quantity exceedes predetermined number threshold value,
Obtain the spacing of any two adjacent sweat pores, and judge this spacing whether in the range of preset pitch, if this spacing is being preset
In spacing range, determine that the fingerprint of this destination object is fingerprint live body, if this spacing is not in the range of preset pitch, determine this
The fingerprint of destination object is fingerprint prosthese.
Wherein, this preset pitch may range from 150um～350um, between the embodiment of the present invention is with the sweat pore of common people
Away from as reference, but preset pitch scope is not limited by the embodiment of the present invention.
Visible, in the fingerprint identification device described by Fig. 7, fingerprint identification device can identify the sweat gland in fingerprint image
Hole, and identify the true and false of fingerprint according to whether fingerprint image exists sweat pore.Further, embodiment of the present invention increase is right
The width of fingerprint lines, the judgement of the distance etc. between the quantity of sweat pore, sweat pore, it is possible to reduce the mistake that true and false fingerprint judges
Difference, such that it is able to improve accuracy and the safety of fingerprint recognition.
Should be appreciated that in embodiments of the present invention, alleged processor 701 can be CPU (Central
Processing Unit, CPU), this processor can also is that other general processors, digital signal processor (Digital
Signal Processor, DSP), special IC (Application Specific Integrated Circuit,
ASIC), ready-made programmable gate array (Field-Programmable Gate Array, FPGA) or other FPGAs
Device, discrete gate or transistor logic, discrete hardware components etc..General processor can be microprocessor or this at
Reason device can also be the processor etc. of any routine.
Input equipment 702 can include Trackpad, fingerprint sensor (being used for gathering fingerprint), mike etc., outut device
703 can include display (LCD etc.), speaker etc..
This memorizer 704 can include read only memory and random access memory, and to processor 701 provide instruction and
Data.A part for memorizer 704 can also include nonvolatile RAM.Such as, memorizer 704 can also be deposited
The information of storage device type.
In implementing, processor 701, input equipment 702 described in the embodiment of the present invention, outut device 703 can
Implementation described in the first embodiment of fingerprint identification method disclosed in the execution embodiment of the present invention and the second embodiment,
Also can perform the implementation of fingerprint identification device described by the embodiment of the present invention, not repeat them here.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, be permissible
Instructing relevant hardware by computer program to complete, described program can be stored in a computer read/write memory medium
In, this program is upon execution, it may include such as the flow process of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic
Dish, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access
Memory, RAM) etc..
The above disclosed present pre-ferred embodiments that is only, can not limit the right model of the present invention with this certainly
Enclose, the equivalent variations therefore made according to the claims in the present invention, still belong to the scope that the present invention is contained.
Claims (10)
1. a fingerprint identification method, it is characterised in that including:
Gather fingerprint image for destination object, and from described fingerprint image, determine target fingerprint lines；
Judge whether described target fingerprint lines exists sweat pore；
If there is described sweat pore, determine that the fingerprint of described destination object is fingerprint live body；
If there is no described sweat pore, determine that the fingerprint of described destination object is fingerprint prosthese.
Method the most according to claim 1, it is characterised in that described judge whether there is antiperspirant in described target fingerprint lines
Glandular orifice, including:
Obtain the gray-scale figure of described target fingerprint lines tangent plane, and determine the characteristic information of described gray-scale figure；
Judge whether described characteristic information mates with default characteristic information；
If described characteristic information mates with described default characteristic information, search in described gray-scale figure according to described characteristic information
Target characteristic point, and described target characteristic point is defined as sweat pore.
Method the most according to claim 2, it is characterised in that described for destination object collection fingerprint image, and from institute
Stating after determining target fingerprint lines in fingerprint image, described method also includes:
Obtain the lines width of described target fingerprint lines；
Judge described lines width whether in the range of predetermined width, if in the range of described predetermined width, sentenced described in execution
Whether disconnected described target fingerprint lines exists the operation of sweat pore.
The most according to the method in claim 2 or 3, it is characterised in that described method also includes:
If there is described sweat pore, determine the ridge orientation of described target fingerprint lines；
The sweat pore in described target fingerprint lines is searched along described ridge orientation；
Judge whether the quantity of the sweat pore in described target fingerprint lines exceedes predetermined number threshold value；
If described quantity exceedes described predetermined number threshold value, determine that the fingerprint of described destination object is fingerprint live body；
If described quantity is not less than described predetermined number threshold value, determine that the fingerprint of described destination object is fingerprint prosthese.
Method the most according to claim 4, it is characterised in that described method also includes:
If described quantity exceedes described predetermined number threshold value, obtain the spacing of any two adjacent sweat pores；
Judge that described spacing is whether in the range of preset pitch；
If in the range of described preset pitch, determine that the fingerprint of described destination object is fingerprint live body；
If not in the range of described preset pitch, determine that the fingerprint of described destination object is fingerprint prosthese.
6. a fingerprint identification device, it is characterised in that including:
Collecting unit, for gathering fingerprint image for destination object；
First determines unit, for determining target fingerprint lines from described fingerprint image；
Judging unit, is used for judging whether there is sweat pore in described target fingerprint lines；
Second determines unit, is used for when described judging unit judges that described target fingerprint lines exists described sweat pore, really
The fingerprint of fixed described destination object is fingerprint live body；
Described second determines unit, is additionally operable to judge that described target fingerprint lines does not exist described sweat gland at described judging unit
Kong Shi, determines that the fingerprint of described destination object is fingerprint prosthese.
Device the most according to claim 6, it is characterised in that described judging unit judge described target fingerprint lines is
No there is sweat pore concrete mode be:
Obtain the gray-scale figure of described target fingerprint lines tangent plane, and determine the characteristic information of described gray-scale figure；
Judge whether described characteristic information mates with default characteristic information；
If described characteristic information mates with described default characteristic information, search in described gray-scale figure according to described characteristic information
Target characteristic point, and described target characteristic point is defined as sweat pore.
Device the most according to claim 7, it is characterised in that described device also includes:
First acquiring unit, for obtaining the lines width of described target fingerprint lines；
Described judging unit, be additionally operable to judge described lines width whether in the range of predetermined width, if at described default width
In the range of degree, perform the described operation judging whether to there is sweat pore in described target fingerprint lines.
9. according to the device described in claim 7 or 8, it is characterised in that
Described first determines unit, is additionally operable to judge that described target fingerprint lines exists described sweat pore at described judging unit
Time, determine the ridge orientation of described target fingerprint lines；
Described device also includes:
Search unit, for searching the sweat pore in described target fingerprint lines along described ridge orientation；
Described judging unit, is additionally operable to judge whether the quantity of the sweat pore in described target fingerprint lines exceedes predetermined number threshold
Value；
Described second determines unit, is additionally operable to judge that described quantity exceedes described predetermined number threshold value at described judging unit
Time, determine that the fingerprint of described destination object is fingerprint live body；
Described second determines unit, is additionally operable to judge that described quantity is not less than described predetermined number threshold value at described judging unit
Time, determine that the fingerprint of described destination object is fingerprint prosthese.
Device the most according to claim 9, it is characterised in that described device also includes:
Second acquisition unit, for when described judging unit judges that described quantity exceedes described predetermined number threshold value, obtains
The spacing of any two adjacent sweat pores；
Described judging unit, is additionally operable to judge that described spacing is whether in the range of preset pitch；
Described second determines unit, is additionally operable to judge that described spacing is in the range of described preset pitch at described judging unit
Time, determine that the fingerprint of described destination object is fingerprint live body；
Described second determines unit, is additionally operable to judge that described spacing is not in the range of described preset pitch at described judging unit
Time, determine that the fingerprint of described destination object is fingerprint prosthese.
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| CN106250890B (en) | 2020-05-05 |
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