CN105046233A - Method and device for acquiring fingerprint data and fingerprint identification method and device - Google Patents
Method and device for acquiring fingerprint data and fingerprint identification method and device Download PDFInfo
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- CN105046233A CN105046233A CN201510447683.XA CN201510447683A CN105046233A CN 105046233 A CN105046233 A CN 105046233A CN 201510447683 A CN201510447683 A CN 201510447683A CN 105046233 A CN105046233 A CN 105046233A
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- 238000010276 construction Methods 0.000 claims description 3
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- 238000010586 diagram Methods 0.000 description 8
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 3
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/60—Type of objects
- G06V20/64—Three-dimensional objects
- G06V20/653—Three-dimensional objects by matching three-dimensional models, e.g. conformal mapping of Riemann surfaces
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F18/00—Pattern recognition
Abstract
The invention provides a method and a device for acquiring fingerprint data and a fingerprint identification method and a device, wherein the method for acquiring the fingerprint data comprises the following steps: collecting at least two fingerprint images of a current finger; determining a variation curve of the at least two fingerprint images in space; determining a spatial track of fingerprint lines according to the fingerprint image and the variation curve; and constructing a three-dimensional fingerprint corresponding to the current finger according to the fingerprint image and the space trajectory. The invention provides a method and a device for acquiring fingerprint data and a fingerprint identification method and a device, which can improve the security of the fingerprint data.
Description
Technical field
The present invention relates to data acquisition technology field, particularly a kind of method and device, fingerprint identification method and device obtaining finger print data.
Background technology
Along with the fast development of science and technology, fingerprint identification technology application is also more and more extensive.In fingerprint identification technology, a very important link is exactly the acquisition of finger print data.
In prior art, the acquisition of finger print data is mainly obtained to the finger print data of two-dimensional image mode.By finger presses on collecting device, wait for a period of time, collecting device obtains current finger print image, and the two-dimentional fingerprint image according to collecting generates finger print data.In concrete application, compare according to the finger print data of the two-dimentional fingerprint image pattern collected and current fingerprint.But these finger print datas can be retained in everyday environments by user is unconscious, are easily replicated.In addition, along with the progress of technology, the method copying user fingerprints data by untouchable modes such as high definition photos more exacerbates the risk of the finger print data of two-dimensional image mode.
Visible by foregoing description, in the method for the acquisition finger print data of prior art, acquisition be the finger print data of two-dimensional image mode, the security of the finger print data that this method obtains is lower.
Summary of the invention
In view of this, the invention provides a kind of method and device, fingerprint identification method and the device that obtain finger print data, the security of finger print data can be improved.
First aspect, the invention provides a kind of method obtaining finger print data, comprising:
S1: at least two fingerprint images gathering current finger;
S2: at least two fingerprint images change curve in space described in determining;
S3: according to described fingerprint image and described change curve, determine the space tracking of fingerprint lines;
S4: according to described fingerprint image and described space tracking, builds the three-dimensional fingerprint that current finger is corresponding.
Further, described step S1 comprises: according to time sequencing, gathers N number of fingerprint image of current finger successively, N be greater than 1 natural number;
Comprise further between step S1 and step S2: according to the time sequencing gathered, by arranged in parallel successively for the N number of fingerprint image collected;
Described S2, comprising:
S21: determine on the edge of each fingerprint image M structure point, M be greater than 1 natural number;
S22: make i=1;
S23: for i-th layer of fingerprint image, make k=1;
S24: the structure o'clock kth corresponding with on the fingerprint image of the i-th+1 layer of the kth on i-th layer is constructed and is a little connected, the kth adjacent connection lines between obtaining i-th layer and the i-th+1 layer;
S25: judge whether the currency of k equals M, if so, performs step S26, otherwise, perform step S27;
S26: judge whether the currency of i equals N-1, if so, then performs step S28, otherwise, make i=i+1, then return step S23;
S27: make k=k+1, returns step S24;
S28: according to all acquired adjacent connection lines, determines fingerprint image change curve in space.
Further, described S3, comprising:
According to described change curve, the virtual fingerprint image parallel with fingerprint image is set between often adjacent fingerprint image;
According to fingerprint image and virtual fingerprint image, in each virtual fingerprint image, be loaded into corresponding fingerprint lines;
Determine the fingerprint lines edge pixel point on the edge of all fingerprint images and all virtual fingerprint images;
Be connected by fingerprint lines edge pixel point corresponding in the construct image of arbitrary neighborhood, determine the space tracking of fingerprint lines, described construct image comprises: fingerprint image, virtual fingerprint image.
Further, described according to fingerprint image and virtual fingerprint image, in each virtual fingerprint image, be loaded into corresponding fingerprint lines, comprise:
According to the area of current virtual fingerprint image, in the fingerprint image of correspondence, intercept fingerprint image of the same area section, the section of the fingerprint image of intercepting is loaded in current virtual fingerprint image.
Second aspect, the invention provides a kind of fingerprint identification method, comprising:
According to the method for described acquisition finger print data arbitrary in first aspect, build the three-dimensional fingerprint that finger to be matched is corresponding in advance;
Determine the first identification code of the three-dimensional fingerprint that described finger to be matched is corresponding;
Also comprise:
According to the method for acquisition finger print data arbitrary in first aspect, build the three-dimensional fingerprint that finger to be identified is corresponding;
Determine the second identification code of the three-dimensional fingerprint that described finger to be identified is corresponding;
Judge whether described first identification code mates with described second identification code, if coupling, then fingerprint recognition success, otherwise, fingerprint recognition failure.
The third aspect, the invention provides a kind of device obtaining finger print data, comprising:
Collecting unit, for gathering at least two fingerprint images of current finger;
First determining unit, at least two fingerprint images change curve in space described in determining;
Second determining unit, for according to described fingerprint image and described change curve, determines the space tracking of fingerprint lines;
Construction unit, for according to described fingerprint image and described space tracking, builds the three-dimensional fingerprint that current finger is corresponding.
Further, described collecting unit, for according to time sequencing, gathers at least two fingerprint images of current finger successively;
Also comprise: setting unit, for according to the time sequencing gathered, by arranged in parallel successively for all fingerprint images collected;
Described first determining unit, for performing step S21 to step S28:
S21: determine on the edge of each fingerprint image M structure point, M be greater than 1 natural number;
S22: make i=1;
S23: for i-th layer of fingerprint image, make k=1;
S24: the structure o'clock kth corresponding with on the fingerprint image of the i-th+1 layer of the kth on i-th layer is constructed and is a little connected, the kth adjacent connection lines between obtaining i-th layer and the i-th+1 layer;
S25: judge whether the currency of k equals M, if so, performs step S26, otherwise, perform step S27;
S26: judge whether the currency of i equals N-1, if so, then performs step S28, otherwise, make i=i+1, then return step S23;
S27: make k=k+1, returns step S24;
S28: according to all acquired adjacent connection lines, determines fingerprint image change curve in space.
Further, described second determining unit, comprising:
Virtual fingerprint image arranges subelement, for according to described change curve, between adjacent fingerprint image, arranges the virtual fingerprint image parallel with fingerprint image;
Be loaded into subelement, for according to fingerprint image and virtual fingerprint image, in each virtual fingerprint image, be loaded into corresponding fingerprint lines;
Pixel subelement, the fingerprint lines pixel on the edge determining all fingerprint images and all virtual fingerprint images;
Space tracking subelement, for being connected by fingerprint lines edge pixel point corresponding in the construct image of arbitrary neighborhood, determine the space tracking of fingerprint lines, described construct image comprises: fingerprint image, virtual fingerprint image.
Further, described loading subelement, for the area according to current virtual fingerprint image, intercepts fingerprint image of the same area section, the section of the fingerprint image of intercepting is loaded in current virtual fingerprint image in the fingerprint image of correspondence.
Fourth aspect, the invention provides a kind of fingerprint identification device, comprising:
Device, the first identification code determining unit, the second identification code determining unit, the recognition unit of arbitrary described acquisition finger print data in the third aspect;
The device of described acquisition finger print data, for building three-dimensional fingerprint corresponding to finger to be matched, builds the three-dimensional fingerprint that finger to be identified is corresponding;
Described first identification code determining unit, for determining the first identification code of the three-dimensional fingerprint that described finger to be matched is corresponding;
Described second identification code determining unit, for determining the second identification code of the three-dimensional fingerprint that described finger to be identified is corresponding;
Described recognition unit, for judging whether described first identification code mates with described second identification code, when judged result is for being, then fingerprint recognition success, when judged result is no, fingerprint recognition failure.
The invention provides a kind of method and the device that obtain finger print data, fingerprint identification method and device, gather at least two fingerprint images, the edge of different fingerprint images is along with acquisition time difference, can change to some extent, formation and modification curve in space, fingerprint lines is had in each fingerprint image, multiple fingerprint image forms the space tracking of fingerprint lines in space, and then obtain three-dimensional fingerprint, three-dimensional fingerprint includes the information of at least two fingerprint images, and contain the space tracking of fingerprint lines, be difficult to be replicated with counterfeit, using current three-dimensional fingerprint as finger print data, improve the security of finger print data.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of process flow diagram obtaining the method for finger print data that one embodiment of the invention provides;
Fig. 2 is the process flow diagram of the method for the another kind acquisition finger print data that one embodiment of the invention provides;
Fig. 3 is the change schematic diagram of fingerprint image in a kind of fingerprint collecting process of providing of one embodiment of the invention;
Fig. 4 is the space structure schematic diagram between a kind of adjacent fingerprint image of providing of one embodiment of the invention;
Fig. 5 is the space structure schematic diagram of a kind of three-dimensional fingerprint that one embodiment of the invention provides;
Fig. 6 is the process flow diagram of a kind of fingerprint identification method that one embodiment of the invention provides;
Fig. 7 is a kind of schematic diagram obtaining the device of finger print data that one embodiment of the invention provides;
Fig. 8 is the schematic diagram of a kind of fingerprint identification device that one embodiment of the invention provides.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly; below in conjunction with the accompanying drawing in the embodiment of the present invention; technical scheme in the embodiment of the present invention is clearly and completely described; obviously; described embodiment is the present invention's part embodiment, instead of whole embodiments, based on the embodiment in the present invention; the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of protection of the invention.
Embodiment 1:
As shown in Figure 1, embodiments provide a kind of method obtaining finger print data, the method can comprise the following steps:
S1: at least two fingerprint images gathering current finger;
S2: the edge change curve in space of at least two fingerprint images described in determining;
S3: according to described fingerprint image and described change curve, determine the space tracking of fingerprint lines;
S4: according to described fingerprint image and described space tracking, builds the three-dimensional fingerprint that current finger is corresponding.
A kind of method obtaining finger print data that the embodiment of the present invention provides, gather at least two fingerprint images, the edge of different fingerprint images is along with acquisition time difference, can change to some extent, formation and modification curve in space, fingerprint lines is had in each fingerprint image, multiple fingerprint image forms the space tracking of fingerprint lines in space, and then obtain three-dimensional fingerprint, three-dimensional fingerprint includes the information of at least two fingerprint images, and contain the space tracking of fingerprint lines, be difficult to be replicated with counterfeit, using current three-dimensional fingerprint as finger print data, improve the security of finger print data.
In a kind of possible implementation, described step S1 comprises: according to time sequencing, gathers N number of fingerprint image of current finger successively, N be greater than 1 natural number;
Comprise further between step S1 and step S2: according to the time sequencing gathered, by arranged in parallel successively for the N number of fingerprint image collected;
Described S2, comprising:
S21: determine on the edge of each fingerprint image M structure point, M be greater than 1 natural number;
S22: make i=1;
S23: for i-th layer of fingerprint image, make k=1;
S24: the structure o'clock kth corresponding with on the fingerprint image of the i-th+1 layer of the kth on i-th layer is constructed and is a little connected, the kth adjacent connection lines between obtaining i-th layer and the i-th+1 layer;
S25: judge whether the currency of k equals M, if so, performs step S26, otherwise, perform step S27;
S26: judge whether the currency of i equals N-1, if so, then perform step S28, otherwise another i=i+1, then returns step S23;
S27:k=k+1, returns step S24;
S28: according to all acquired adjacent connection lines, determines fingerprint image change curve in space.
Construct the space structure that three-dimensional fingerprint needs to construct three-dimensional fingerprint, using each fingerprint image as a layer, determined the relative position of these fingerprint images by fingerprint image change curve in space, formed the space structure of three-dimensional fingerprint by change curve and fingerprint image.
After the space structure constructing three-dimensional fingerprint, need to add fingerprint lines on this space structure.In order to make the three-dimensional fingerprint that constructs more accurate, needing abundant fingerprint image, filling this space structure.On the one hand, by regulating the employing frequency gathering fingerprint, abundant fingerprint image can be gathered realize.On the other hand, virtual fingerprint image can be added realize between adjacent fingerprint image.Embodiments provide a kind of mode of adding virtual fingerprint image to realize.
Described S3, comprising:
According to described change curve, the virtual fingerprint image parallel with fingerprint image is set between often adjacent fingerprint image;
According to fingerprint image and virtual fingerprint image, in each virtual fingerprint image, be loaded into corresponding fingerprint lines;
Determine the fingerprint lines edge pixel point on the edge of all fingerprint images and all virtual fingerprint images;
Be connected by fingerprint lines edge pixel point corresponding in the construct image of arbitrary neighborhood, determine the space tracking of fingerprint lines, described construct image comprises: fingerprint image, virtual fingerprint image.
After having abundant fingerprint image and virtual fingerprint image in space structure, the edge of fingerprint image and virtual fingerprint image there is fingerprint lines edge pixel point, corresponding for these pixels coupling together just is constituted the fingerprint lines on this space structure.
Wherein, described according to fingerprint image and virtual fingerprint image, in each virtual fingerprint image, be loaded into corresponding fingerprint lines, comprise:
According to the area of current virtual fingerprint image, in the fingerprint image of correspondence, intercept fingerprint image of the same area section, the section of the fingerprint image of intercepting is loaded in current virtual fingerprint image.
In a kind of possible implementation, described S1, comprising:
Whether the surface of contact judging fingerprint capturer there is finger contact, when determining described surface of contact there is finger contact, periodically gathering at least two fingerprint images of current finger.
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
As shown in Figure 2, embodiments provide a kind of method obtaining finger print data, the method can comprise the following steps:
Step 201: according to time sequencing, gathers N number of fingerprint image of current finger successively.
Particularly, gather the N number of fingerprint image of current finger on the surface of contact of fingerprint capturer in once pressing process, N be greater than 1 natural number.
As shown in Figure 3, because finger itself exists certain radian, can expand gradually to surface of contact in the overall process terminated from pressing, until contact completely.For example, the process of fingerprint pressing is just pressed on desktop slowly as by a balloon.From that time that balloon surface touches desktop, often cross certain time interval, the contact area between balloon and desktop will become large thereupon.If the change in each moment to be all identified as an independently layer, these layer just can form complete three-dimensional picture after combining so the most at last, and such 3 D graphic data is difficult to be undertaken copying by other channel, this has just fundamentally stopped fingerprint by counterfeit possibility.
This step specifically can realize in the following manner: whether the surface of contact judging fingerprint capturer has finger contact, when determining described surface of contact there is finger contact, periodically gather at least two fingerprint images of current finger, when determine current finger be less than or equal to the rate of change of the contact area of described surface of contact in Preset Time in advance rate of change time, contact gatherer process.Wherein, collection period is generally a millisecond rank, and collection period is shorter, more accurately.
Fingerprint image in the embodiment of the present invention can be the image of current finger and above-mentioned surface of contact contact portion.
Step 202: according to the time sequencing gathered, by arranged in parallel successively for the N number of fingerprint image collected.
Be parallel to each other between fingerprint image, and can by vertical for the line of the fingerprint central point made on each fingerprint image and fingerprint image.Distance between fingerprint image can be determined according to the acquisition time interval between fingerprint image, and in general, acquisition time interval is larger, and the distance between fingerprint image is larger.
Step 203: determine on the edge of each fingerprint image M structure point, M be greater than 1 natural number.
Structure point can be the geometry summit of fingerprint image.
As described in Figure 4, ABCD and A3B3C3D3 is fingerprint image, and some A, B, C, D are the geometry summits of ABCD, are the structure points of fingerprint image ABCD; Point A3, B3, C3, D3 are the geometry summits of A3B3C3D3, are the structure points of fingerprint image A3B3C3D3.The structure point of fingerprint image is mutually corresponding, such as, put A corresponding with some A3.
Step 204: make i=1.
Step 205: for i-th layer of fingerprint image, make k=1.
Step 206: the structure o'clock kth corresponding with on the fingerprint image of the i-th+1 layer of the kth on i-th layer is constructed and is a little connected, the kth adjacent connection lines between obtaining i-th layer and the i-th+1 layer.
As Fig. 4, fingerprint image ABCD and fingerprint image A3B3C3D3 is adjacent fingerprint image.Adjacent connection lines between these two fingerprint images is AA3, BB3, CC3, DD3.
Step 207: judge whether the currency of k equals M, if so, performs step 208, otherwise, perform step 209.
Step 208: judge whether the currency of i equals N-1, if so, then performs step 210, otherwise, make i=i+1, then return step 205.
Step 209: make k=k+1, returns step 206.
Step 210: according to all acquired adjacent connection lines, determines fingerprint image change curve in space.
Particularly, as shown in Figure 5, having three fingerprint images, is ABCD, A3B3C3D3, A6B6C6D6, A9B9C9D9 respectively.AA3 is the adjacent connection lines between fingerprint image ABCD and fingerprint image A3B3C3D3, A3A6 is the adjacent connection lines between fingerprint image A3B3C3D3 and fingerprint image A6B6C6D6, A6A9 is the adjacent connection lines between fingerprint image A6B6C6D6 and fingerprint image A9B9C9D9, AA3, A3A6, A6A9 are connected, obtain AA9, and other adjacent connection lines correspondence is connected, obtain BB9, CC9, DD9 respectively, AA9, BB9, CC9, DD9 are change curve.
Step 211: according to described change curve, arranges the virtual fingerprint image parallel with fingerprint image between often adjacent fingerprint image.
Particularly, each adjacent connection lines of the first fingerprint image and the second fingerprint image is divided into second preset value part according to same ratio, determines the waypoint of each adjacent connection lines.
As shown in Figure 4, each adjacent connection lines divide into three equal parts, and some A1, B1, C1, D1, A2, B2, C2, D2 are all waypoints.
Between the first fingerprint image and the second fingerprint image, waypoint corresponding in all adjacent connection lines is connected, constructs the second preset value virtual fingerprint image parallel with fingerprint image.
As shown in Figure 4, point A1, B1, C1, D1 are corresponding waypoints, point A2, B2, C2, D2 are corresponding waypoints, and corresponding waypoint is positioned in the plane parallel with fingerprint image simultaneously, constructs virtual fingerprint image A1B1C1D1, virtual fingerprint image A2B2C2D2.
Step 212: according to fingerprint image and virtual fingerprint image, is loaded into corresponding fingerprint lines in each virtual fingerprint image.
Particularly, according to the area of current virtual fingerprint image, in the fingerprint image of correspondence, intercept fingerprint image of the same area section, the section of the fingerprint image of intercepting is loaded in current virtual fingerprint image.
As shown in Figure 4, for virtual fingerprint image A1B1C1D1, by virtual fingerprint image A1B1C1D1 vertical projection on A3B3C3D3, projection section is loaded in A1B1C1D1 as fingerprint image section.
Step 213: determine the fingerprint lines edge pixel point on the edge of all fingerprint images and all virtual fingerprint images.
Step 214: be connected by fingerprint lines edge pixel point corresponding in the construct image of arbitrary neighborhood, determine the space tracking of fingerprint lines, described construct image comprises: fingerprint image, virtual fingerprint image.
Particularly, between adjacent construct image, the fingerprint lines edge pixel point belonging to the correspondence of same fingerprint lines is connected.According to the difference of the resolution on image, by be used for representing the pixel of fingerprint lines abstract be data 1, other white space zero setting, by these data stuffings to virtual fingerprint image.Connect fingerprint lines pixel corresponding on the edge of adjacent construct image, determine the space tracking of fingerprint lines.When determining space tracking, it is also conceivable to the acquisition time parameter of fingerprint image, the fingerprint lines in the construct image being is arranged in order on a timeline, makes space tracking more accurate.
Step 215: according to described fingerprint image and described space tracking, builds the three-dimensional fingerprint that current finger is corresponding.
A kind of method obtaining finger print data that the embodiment of the present invention provides, can realize above-mentioned steps in data space.
Embodiment 2:
See Fig. 6, embodiments provide a kind of fingerprint identification method, comprising:
Step 601: according to the method for described acquisition finger print data arbitrary in embodiment 1, build the three-dimensional fingerprint that finger to be matched is corresponding in advance;
Step 602: the first identification code determining the three-dimensional fingerprint that described finger to be matched is corresponding;
Also comprise:
Step 603: according to the method for acquisition finger print data arbitrary in embodiment 1, builds the three-dimensional fingerprint that finger to be identified is corresponding;
Step 604: the second identification code determining the three-dimensional fingerprint that described finger to be identified is corresponding;
Step 605: judge whether described first identification code mates with described second identification code, if coupling, then fingerprint recognition success, otherwise, fingerprint recognition failure.
After the three-dimensional fingerprint of structure, three-dimensional fingerprint can be used for fingerprint recognition.When equipment Inspection to the change of fingerprint in a certain amount of time beyond desired value time, just can determine that it is counterfeit behavior, because counterfeit fingerprint cannot the physical characteristics of complete reproduction finger tip.
Determine the identification code of this three-dimensional fingerprint according to above-mentioned three-dimensional fingerprint, this identification code can be the md5 value of three-dimensional fingerprint.Identification code data mainly comprises: (space geometry structure is that complete fingerprint reduces for complete fingerprint texture structure, the space structure of fingerprint texture, the space profiles of finger and the architectural feature corresponding to the difference of pressing duration, content is abundanter than two-dimentional fingerprint, simulates with the geometry in data space) etc.Wherein, complete fingerprint texture structure is the planar geometry between fingerprint lines.The space structure of fingerprint texture: fingerprint lines space tracking in space.The space profiles of finger: the three-dimensional fingerprint referring to finger.The architectural feature of pressing corresponding to the duration: referring to the surface of contact contacting fingerprint capturer from user herein, to the space motion track corresponding to the time interval that process terminates, comprise: press-down type pressing, slidingtype pressing etc., to promote the compatibility of more eurypalynous fingerprint identification device in identifying.
In fingerprint identification process, in advance by a kind of method obtaining finger print data that the fingerprint of user provides according to the embodiment of the present invention, generate three-dimensional fingerprint, preserve this three-dimensional fingerprint, and generate the first identification code corresponding to this three-dimensional fingerprint, preserve this first identification code.Obtain the fingerprint image of finger to be identified, generate the three-dimensional fingerprint of finger to be identified, generate the second identification code of the three-dimensional fingerprint of finger to be identified.According to the first identification code and the second identification code, judge that whether finger corresponding to finger to be identified and the first identification code be identical.
Concrete fingerprint identification process is as follows:
Step 1: initialization algorithm structure, circular wait identification signal.
Current when having a surface of contact of finger contact fingerprint capturer, produce identification signal.
Step 2: activate identification module, call function GetFingerprintPart (), obtains current finger print image.
Particularly, the current finger print image of surface of contact is obtained by fingerprint capturer.
Step 3: the termination signals to be identified such as call function IsFinished (), as without termination signal, then according to certain frequency recursive call step 2, by recognized fingerprint image stored in Array for structural body bmpFinger [], otherwise enter step 4.
Step 4: imported into by Array for structural body bmpFinger [] in various dimensions finger print data generating function CreateXdFingerShape (), generates the identification code of multidimensional data.
Particularly, function CreateXdFingerShape calculates three-dimensional fingerprint according to the fingerprint image in bmpFinger [] and interval time, then determines the identification code of this three-dimensional fingerprint.
Step 5: the identification code that call function ReadFingerShape () fetch equipment prestores.
Step 6: call function CompareFingerShape () contrasts the identification code of step 4 and step 5.
Step 7: successfully then return true as contrasted, otherwise return false.
Particularly, the variance rate of general two identification codes lower than preset value, is then determined to identify successfully, is returned true, and user is by identifying, otherwise determine recognition failures, return false, user is not by identifying, this preset value can be 30 percent.
All there is its corresponding fingerprint lines in the edge of different fingerprint images, and the continuity of this fingerprint lines can allow the fault-tolerance of fingerprint recognition get a promotion.Suppose that physical breakage has appearred in the fingerprint of user, as long as this breakage can not have influence on most lines variation tracks, so just can think that this fingerprint can be identified, thus the puzzlement that the behavior of minimizing fingerprint recognition causes user.
Embodiment 3:
See Fig. 7, embodiments provide a kind of device obtaining finger print data, comprising:
Collecting unit 701, for gathering at least two fingerprint images of current finger;
First determining unit 702, for the edge change curve in space of at least two fingerprint images described in determining;
Second determining unit 703, for according to described fingerprint image and described change curve, determines the space tracking of fingerprint lines;
Construction unit 704, for according to described fingerprint image and described space tracking, builds the three-dimensional fingerprint that current finger is corresponding.
In a kind of possible implementation, described collecting unit 701, for according to time sequencing, gathers at least two fingerprint images of current finger successively;
Also comprise: setting unit, for according to the time sequencing gathered, by arranged in parallel successively for all fingerprint images collected;
Described first determining unit 702, for performing step S21 to step S28:
S21: determine on the edge of each fingerprint image M structure point, M be greater than 1 natural number;
S22: make i=1;
S23: for i-th layer of fingerprint image, make k=1;
S24: the structure o'clock kth corresponding with on the fingerprint image of the i-th+1 layer of the kth on i-th layer is constructed and is a little connected, the kth adjacent connection lines between obtaining i-th layer and the i-th+1 layer;
S25: judge whether the currency of k equals M, if so, performs step S26, otherwise, perform step S27;
S26: judge whether the currency of i equals N-1, if so, then performs step S28, otherwise, make i=i+1, then return step S23;
S27: make k=k+1, returns step S24;
S28: according to all acquired adjacent connection lines, determines fingerprint image change curve in space.
In a kind of possible implementation, described second determining unit 703, comprising:
Virtual fingerprint image arranges subelement, for according to described change curve, between adjacent fingerprint image, arranges the virtual fingerprint image parallel with fingerprint image;
Be loaded into subelement, for according to fingerprint image and virtual fingerprint image, in each virtual fingerprint image, be loaded into corresponding fingerprint lines;
Pixel subelement, the fingerprint lines pixel on the edge determining all fingerprint images and all virtual fingerprint images;
Space tracking subelement, for being connected by fingerprint lines edge pixel point corresponding in the construct image of arbitrary neighborhood, determine the space tracking of fingerprint lines, described construct image comprises: fingerprint image, virtual fingerprint image.
In a kind of possible implementation, whether described collecting unit 701, have finger contact on the surface of contact judging fingerprint capturer, when determining described surface of contact there is finger contact, periodically gathers at least two fingerprint images of current finger.
The content such as information interaction, implementation between each unit in said apparatus, due to the inventive method embodiment based on same design, particular content can see in the inventive method embodiment describe, repeat no more herein.
Embodiment 4:
See Fig. 8, embodiments provide a kind of fingerprint identification device, comprising:
Device 801, first identification code determining unit 802, second identification code determining unit 803, the recognition unit 804 of arbitrary described acquisition finger print data in embodiment 3;
The device 801 of described acquisition finger print data, for building three-dimensional fingerprint corresponding to finger to be matched, builds the three-dimensional fingerprint that finger to be identified is corresponding;
Described first identification code determining unit 802, for determining the first identification code of the three-dimensional fingerprint that described finger to be matched is corresponding;
Described second identification code determining unit 803, for determining the second identification code of the three-dimensional fingerprint that described finger to be identified is corresponding;
Described recognition unit 804, for judging whether described first identification code mates with described second identification code, when judged result is for being, then fingerprint recognition success, when judged result is no, fingerprint recognition failure.
The content such as information interaction, implementation between each unit in said apparatus, due to the inventive method embodiment based on same design, particular content can see in the inventive method embodiment describe, repeat no more herein.
Embodiments provide a kind of method and device, fingerprint identification method and the device that obtain finger print data, there is following beneficial effect:
1, a kind of method and device obtaining finger print data that the embodiment of the present invention provides, fingerprint identification method and device, gather at least two fingerprint images, the edge of different fingerprint images is along with acquisition time difference, can change to some extent, formation and modification curve in space, fingerprint lines is had in each fingerprint image, multiple fingerprint image forms the space tracking of fingerprint lines in space, and then obtain three-dimensional fingerprint, three-dimensional fingerprint includes the information of at least two fingerprint images, and contain the space tracking of fingerprint lines, be difficult to be replicated with counterfeit, using current three-dimensional fingerprint as finger print data, improve the security of finger print data.
2, a kind of method and device, fingerprint identification method and device obtaining finger print data of providing of the embodiment of the present invention, all there is its corresponding fingerprint lines in the edge of different fingerprint images, and the continuity of this fingerprint lines can allow the fault-tolerance of fingerprint recognition get a promotion, suppose that physical breakage has appearred in the fingerprint of user, as long as this breakage can not have influence on most lines variation tracks, so just can think that this fingerprint can be identified, thus the puzzlement that the behavior of minimizing fingerprint recognition causes user.
3, a kind of method and device, fingerprint identification method and device obtaining finger print data of providing of the embodiment of the present invention, the change in each moment is all identified as an independently layer, these layer just can form complete three-dimensional picture after combining the most at last, each fingerprint image is a layer, three-dimensional fingerprint is obtained by these fingerprint images, three-dimensional finger print data is difficult to be undertaken copying by other channel, improves the security of finger print data.
It should be noted that, in this article, the relational terms of such as first and second and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element " being comprised a 〃 〃 〃 〃 〃 〃 " limited by statement, and be not precluded within process, method, article or the equipment comprising described key element and also there is other same factor.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that programmed instruction is relevant, aforesaid program can be stored in the storage medium of embodied on computer readable, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium in.
Finally it should be noted that: the foregoing is only preferred embodiment of the present invention, only for illustration of technical scheme of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (10)
1. obtain a method for finger print data, it is characterized in that, comprising:
S1: at least two fingerprint images gathering current finger;
S2: at least two fingerprint images change curve in space described in determining;
S3: according to described fingerprint image and described change curve, determine the space tracking of fingerprint lines;
S4: according to described fingerprint image and described space tracking, builds the three-dimensional fingerprint that current finger is corresponding.
2. method according to claim 1, is characterized in that, described step S1 comprises: according to time sequencing, gathers N number of fingerprint image of current finger successively, N be greater than 1 natural number;
Comprise further between step S1 and step S2: according to the time sequencing gathered, by arranged in parallel successively for the N number of fingerprint image collected;
Described S2, comprising:
S21: determine on the edge of each fingerprint image M structure point, M be greater than 1 natural number;
S22: make i=1;
S23: for i-th layer of fingerprint image, make k=1;
S24: the structure o'clock kth corresponding with on the fingerprint image of the i-th+1 layer of the kth on i-th layer is constructed and is a little connected, the kth adjacent connection lines between obtaining i-th layer and the i-th+1 layer;
S25: judge whether the currency of k equals M, if so, performs step S26, otherwise, perform step S27;
S26: judge whether the currency of i equals N-1, if so, then performs step S28, otherwise, make i=i+1, then return step S23;
S27: make k=k+1, returns step S24;
S28: according to all acquired adjacent connection lines, determines fingerprint image change curve in space.
3. method according to claim 2, is characterized in that, described S3, comprising:
According to described change curve, the virtual fingerprint image parallel with fingerprint image is set between often adjacent fingerprint image;
According to fingerprint image and virtual fingerprint image, in each virtual fingerprint image, be loaded into corresponding fingerprint lines;
Determine the fingerprint lines edge pixel point on the edge of all fingerprint images and all virtual fingerprint images;
Be connected by fingerprint lines edge pixel point corresponding in the construct image of arbitrary neighborhood, determine the space tracking of fingerprint lines, described construct image comprises: fingerprint image, virtual fingerprint image.
4. method according to claim 3, is characterized in that,
Described according to fingerprint image and virtual fingerprint image, in each virtual fingerprint image, be loaded into corresponding fingerprint lines, comprise:
According to the area of current virtual fingerprint image, in the fingerprint image of correspondence, intercept fingerprint image of the same area section, the section of the fingerprint image of intercepting is loaded in current virtual fingerprint image.
5. a fingerprint identification method, is characterized in that, comprising:
According to the method for described acquisition finger print data arbitrary in claim 1-4, build the three-dimensional fingerprint that finger to be matched is corresponding in advance;
Determine the first identification code of the three-dimensional fingerprint that described finger to be matched is corresponding;
Also comprise:
According to the method for acquisition finger print data arbitrary in claim 1-4, build the three-dimensional fingerprint that finger to be identified is corresponding;
Determine the second identification code of the three-dimensional fingerprint that described finger to be identified is corresponding;
Judge whether described first identification code mates with described second identification code, if coupling, then fingerprint recognition success, otherwise, fingerprint recognition failure.
6. obtain a device for finger print data, it is characterized in that, comprising:
Collecting unit, for gathering at least two fingerprint images of current finger;
First determining unit, at least two fingerprint images change curve in space described in determining;
Second determining unit, for according to described fingerprint image and described change curve, determines the space tracking of fingerprint lines;
Construction unit, for according to described fingerprint image and described space tracking, builds the three-dimensional fingerprint that current finger is corresponding.
7. device according to claim 6, is characterized in that,
Described collecting unit, for according to time sequencing, gathers at least two fingerprint images of current finger successively;
Also comprise: setting unit, for according to the time sequencing gathered, by arranged in parallel successively for all fingerprint images collected;
Described first determining unit, for performing step S21 to step S28:
S21: determine on the edge of each fingerprint image M structure point, M be greater than 1 natural number;
S22: make i=1;
S23: for i-th layer of fingerprint image, make k=1;
S24: the structure o'clock kth corresponding with on the fingerprint image of the i-th+1 layer of the kth on i-th layer is constructed and is a little connected, the kth adjacent connection lines between obtaining i-th layer and the i-th+1 layer;
S25: judge whether the currency of k equals M, if so, performs step S26, otherwise, perform step S27;
S26: judge whether the currency of i equals N-1, if so, then performs step S28, otherwise, make i=i+1, then return step S23;
S27: make k=k+1, returns step S24;
S28: according to all acquired adjacent connection lines, determines fingerprint image change curve in space.
8. device according to claim 7, is characterized in that, described second determining unit, comprising:
Virtual fingerprint image arranges subelement, for according to described change curve, between adjacent fingerprint image, arranges the virtual fingerprint image parallel with fingerprint image;
Be loaded into subelement, for according to fingerprint image and virtual fingerprint image, in each virtual fingerprint image, be loaded into corresponding fingerprint lines;
Pixel subelement, the fingerprint lines pixel on the edge determining all fingerprint images and all virtual fingerprint images;
Space tracking subelement, for being connected by fingerprint lines edge pixel point corresponding in the construct image of arbitrary neighborhood, determine the space tracking of fingerprint lines, described construct image comprises: fingerprint image, virtual fingerprint image.
9. device according to claim 8, is characterized in that,
Described loading subelement, for the area according to current virtual fingerprint image, intercepts fingerprint image of the same area section, the section of the fingerprint image of intercepting is loaded in current virtual fingerprint image in the fingerprint image of correspondence.
10. a fingerprint identification device, is characterized in that, comprising:
Device, the first identification code determining unit, the second identification code determining unit, the recognition unit of arbitrary described acquisition finger print data in claim 6-9;
The device of described acquisition finger print data, for building three-dimensional fingerprint corresponding to finger to be matched, builds the three-dimensional fingerprint that finger to be identified is corresponding;
Described first identification code determining unit, for determining the first identification code of the three-dimensional fingerprint that described finger to be matched is corresponding;
Described second identification code determining unit, for determining the second identification code of the three-dimensional fingerprint that described finger to be identified is corresponding;
Described recognition unit, for judging whether described first identification code mates with described second identification code, when judged result is for being, then fingerprint recognition success, when judged result is no, fingerprint recognition failure.
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