CN102708360A - Method for generating and automatically updating fingerprint template - Google Patents
Method for generating and automatically updating fingerprint template Download PDFInfo
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- CN102708360A CN102708360A CN2012101421916A CN201210142191A CN102708360A CN 102708360 A CN102708360 A CN 102708360A CN 2012101421916 A CN2012101421916 A CN 2012101421916A CN 201210142191 A CN201210142191 A CN 201210142191A CN 102708360 A CN102708360 A CN 102708360A
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Abstract
The invention discloses a method for generating and automatically updating a fingerprint template. The method comprises the following steps of: when a fingerprint is registered, acquiring N fingerprint images from the same finger, and extracting and storing N pieces of fingerprint characteristic information; performing template compositing on the N pieces of fingerprint characteristic information to obtain a fingerprint template, and storing the fingerprint template; during comparison of fingerprints, if comparison is successful, performing similarity comparison on the compared fingerprint characteristic information and the N pieces of fingerprint characteristic information two by two; extracting and storing the N pieces of fingerprint characteristic information of which the similarity is highest after similarity comparison; and performing template compositing on the new extracted N pieces of fingerprint characteristic information to obtain a new fingerprint template, and storing and replacing the conventional fingerprint template. According to the method for generating and automatically updating the fingerprint template, the correctness of the fingerprint template and the accuracy of checking a final fingerprint identity are improved.
Description
Technical field
The present invention relates to field of biological recognition, relate in particular to a kind of fingerprint template and generate and automatic method for updating.
Background technology
Along with the fast development of biological identification technology, fingerprint recognition is applied in commercial affairs and the daily life more and more.In the prior art, usually same finger is repeatedly gathered fingerprint characteristic data, simply get arithmetic mean to these fingerprint characteristic datas then and obtain a fingerprint template.Follow-up when authentication; The new fingerprint characteristic data that only will collect carries out the similarity comparison with preset fingerprint template, and similarity surpasses when subscribing threshold values, and finger print identification verification passes through; The user obtains rights of using, and then can get into pre-set programs or carry out the related application operation.But; In practical application; Because the influence that action is lack of standardization when gathering fingerprint, finger surface has factors such as foreign matter and external temperature environmental change; The fingerprint that collects by this method is final to be formed fixing fingerprint template and has some flaws probably, and the fingerprint that just will newly gather simply during identity verification and this fixedly fingerprint template do similarity and compare, may cause height to refuse sincere and accuracy of system identification.
Thereby prior art awaits to improve and improve.
Summary of the invention
The object of the present invention is to provide a kind of fingerprint template to generate and automatic method for updating; Through constantly obtaining new fingerprint characteristic information; Extract N the highest fingerprint characteristic information of comparison similarity; And it is comprehensive to carry out template, upgrades fingerprint template automatically, improves the accuracy of fingerprint template and the accuracy of final finger print identification verification.
For solving the problems of the technologies described above, the present invention adopts following scheme:
S1: when fingerprint register, obtain N fingerprint image, and therefrom extract and preserve N fingerprint characteristic information from same finger;
S2: said N fingerprint characteristic information is carried out template comprehensively obtain a fingerprint template, and with its preservation;
S3: when fingerprint is compared,, fingerprint characteristic information and said N fingerprint characteristic information of said comparison are all carried out the similarity comparison in twos if comparison is passed through;
S4: extract and preserve N the highest fingerprint characteristic information of said similarity comparison back similarity;
S5: it is comprehensive that N fingerprint characteristic information of said new extraction is carried out template, obtains a new fingerprint template, with its preservation and replace original fingerprint template.
Compared to prior art; The present invention comprehensively obtains a fingerprint template through N fingerprint characteristic information is carried out template, when fingerprint comparison passes through, fingerprint characteristic information and said N fingerprint characteristic information of said comparison is all carried out the similarity comparison in twos; Extract and preserve N the highest fingerprint characteristic information of said similarity comparison back similarity; And it is comprehensive that N fingerprint characteristic information of said new extraction is carried out template, obtains a new fingerprint template, with its preservation and replace original fingerprint template; Realize the automatic renewal of fingerprint template, improved the accuracy of fingerprint template and the accuracy of final finger print identification verification.
Description of drawings
Fig. 1 is the fingerprint template generation of the embodiment of the invention and the process flow diagram of automatic method for updating.
Embodiment
The invention provides a kind of fingerprint template and generate and automatic method for updating, clearer, clear and definite for making the object of the invention, technical scheme and effect, below with reference to accompanying drawing and give an actual example to further explain of the present invention.
Fig. 1 provides the process flow diagram of a kind of fingerprint template generation and automatic method for updating for the embodiment of the invention.Said fingerprint template generates and automatic method for updating, may further comprise the steps:
S1: when fingerprint register, obtain N fingerprint image, and therefrom extract and preserve N fingerprint characteristic information from same finger;
S2: said N fingerprint characteristic information is carried out template comprehensively obtain a fingerprint template, and with its preservation;
S3: when fingerprint is compared,, fingerprint characteristic information and said N fingerprint characteristic information of said comparison are all carried out the similarity comparison in twos if comparison is passed through;
S4: extract and preserve N the highest fingerprint characteristic information of said similarity comparison back similarity;
S5: it is comprehensive that N fingerprint characteristic information of said new extraction is carried out template, obtains a new fingerprint template, with its preservation and replace original fingerprint template.
Wherein, N is the quantity that is used to obtain the fingerprint characteristic information that fingerprint template gathers, because fingerprint characteristic information will be gathered once at least, N is the integer more than or equal to 1 here.Consider template quality and the convenience of operation of template after comprehensive, General N can value 3 to 5 between.
When fingerprint register, a said N fingerprint image is to obtain through device with fingerprint sensor or fingerprint image file.Said device with fingerprint sensor can be fingerprint instrument, also can be other equipment that can obtain fingerprint image.Through said apparatus, the same finger of user is obtained N fingerprint image.For ease of analyzing fingerprint image,, a said N image is carried out pre-service such as figure image intensifying, smoothing processing, binaryzation and refinement by the Computer Image Processing program.After a said N fingerprint image preprocessing is intact,, extract and preserve N fingerprint characteristic information through the predetermined fingerprint algorithm.Said a plurality of fingerprint characteristic information comprises multinomial attribute, i.e. the type of each minutiae point of fingerprint, coordinate, direction, curvature and the quantity of minutiae point on every side thereof.The minutiae point of said fingerprint includes but not limited to that line shape, central point, trigpoint, bifurcation, isolated point, branch point and destination node etc. represent the point of fingerprint image characteristics.
In order to obtain the fingerprint template of high accuracy, said N fingerprint characteristic information is carried out template comprehensively obtain a fingerprint template, and with its preservation.In the present embodiment, said template is comprehensive for said N fingerprint characteristic information each item attribute value averaged.For example, obtain three groups of fingerprint images and extract three fingerprint characteristic information to same finger through said method, a central point is arranged in a plurality of minutiae point, three position coordinateses that obtain said central point are (14,42), (16,45) and (12,48).Comprehensive through fingerprint template, promptly the numerical value of said three position coordinateses is averaged, finally obtain a said center position coordinate attributes numerical value (14,45).In like manner, each item attribute value of other a plurality of minutiae point in three the fingerprint characteristic information is averaged, i.e. fingerprint template overall treatment finally comprehensively obtains a fingerprint template that comprises each item fingerprint attribute value composition of a plurality of minutiae point.
In the S3 step, for identifying user identity or renewal adjustment fingerprint template, need compare to fingerprint, soon the fingerprint characteristic information of comparison is carried out the similarity comparison with the said fingerprint template of generation in advance.Certainly, the fingerprint characteristic information of comparison can be extracted through new collection fingerprint image here, also can obtain through existing fingerprint characteristic data.Surpass reservation threshold if participate in both similarities of comparison, then fingerprint comparison passes through; Otherwise, fingerprint comparison fail through.
If fingerprint comparison passes through; Then consider the fingerprint characteristic information of said comparison is brought in the renewal operation of fingerprint template; Fingerprint characteristic information and said N fingerprint characteristic information of said comparison are all carried out the similarity comparison in twos, extract and preserve N the highest fingerprint characteristic information of said similarity comparison back similarity.It is comprehensive then N fingerprint characteristic information of said new extraction to be carried out template, obtains a new fingerprint template, with its preservation and replace original fingerprint template.
Like this, if follow-up fingerprint comparison passes through, will generate new fingerprint template, and replace original fingerprint template, realize the automatic renewal of fingerprint template.
If fingerprint comparison fail through, the fingerprint template of preserving among the step S2 remains unchanged.
The present invention comprehensively obtains a fingerprint template through N fingerprint characteristic information is carried out template; When fingerprint comparison passes through; The fingerprint characteristic information of said comparison and said N fingerprint characteristic information are all carried out the similarity comparison in twos, extract and preserve N the highest fingerprint characteristic information of said similarity comparison back similarity, and it is comprehensive that N fingerprint characteristic information of said new extraction is carried out template; Obtain a new fingerprint template; With its preservation and replace original fingerprint template, realized the automatic renewal of fingerprint template, improved the accuracy of fingerprint template and the accuracy of final finger print identification verification.
It is understandable that, concerning those of ordinary skills, can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection domain of the appended claim of the present invention.
Claims (9)
1. a fingerprint template generates and automatic method for updating, and it comprises step:
S1: when fingerprint register, obtain N fingerprint image, and therefrom extract and preserve N fingerprint characteristic information from same finger;
S2: said N fingerprint characteristic information is carried out template comprehensively obtain a fingerprint template, and with its preservation;
S3: when fingerprint is compared,, fingerprint characteristic information and said N fingerprint characteristic information of said comparison are all carried out the similarity comparison in twos if comparison is passed through;
S4: extract and preserve N the highest fingerprint characteristic information of said similarity comparison back similarity;
S5: it is comprehensive that N fingerprint characteristic information of said new extraction is carried out template, obtains a new fingerprint template, with its preservation and replace original fingerprint template.
2. a kind of fingerprint template as claimed in claim 1 generates and automatic method for updating, it is characterized in that, said template is comprehensive for said N fingerprint characteristic information each item attribute value averaged.
3. a kind of fingerprint template as claimed in claim 2 generates and automatic method for updating, it is characterized in that, the attribute of said N fingerprint characteristic information comprises the type of each minutiae point of fingerprint, coordinate, direction, curvature and the quantity of minutiae point on every side thereof.
4. a kind of fingerprint template as claimed in claim 1 generates and automatic method for updating, it is characterized in that a said N fingerprint image is to obtain through device with fingerprint sensor or fingerprint image file.
5. a kind of fingerprint template as claimed in claim 1 generates and automatic method for updating, it is characterized in that in the S3 step, the fingerprint characteristic information of said comparison is to obtain through fingerprint characteristic data.
6. a kind of fingerprint template as claimed in claim 1 generates and automatic method for updating, it is characterized in that in the S3 step, the fingerprint characteristic information of said comparison is to extract through new collection fingerprint image.
7. a kind of fingerprint template as claimed in claim 1 generates and automatic method for updating, it is characterized in that, during fingerprint comparison, fingerprint characteristic information and the said fingerprint template compared is compared, and both similarities surpass reservation threshold, and then fingerprint comparison passes through.
8. a kind of fingerprint template as claimed in claim 1 generates and automatic method for updating, it is characterized in that, if fingerprint comparison fail through, the fingerprint template of then preserving among the step S2 remains unchanged.
9. a kind of fingerprint template as claimed in claim 1 generates and automatic method for updating, it is characterized in that N is the integer more than or equal to 1.
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| CN103839045A (en) * | 2012-11-23 | 2014-06-04 | 神盾股份有限公司 | Fingerprint identification system and fingerprint identification method |
| CN104036269A (en) * | 2014-07-03 | 2014-09-10 | 南昌欧菲生物识别技术有限公司 | Fingerprint registration method and terminal device |
| CN104346552A (en) * | 2013-08-08 | 2015-02-11 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN105389564A (en) * | 2015-11-13 | 2016-03-09 | 广东欧珀移动通信有限公司 | Fingerprint registration method, fingerprint registration device and mobile terminal |
| CN105426720A (en) * | 2015-10-31 | 2016-03-23 | 东莞酷派软件技术有限公司 | Method and terminal for modifying registered fingerprints |
| CN105426835A (en) * | 2015-11-13 | 2016-03-23 | 广东欧珀移动通信有限公司 | Fingerprint registration method and apparatus and mobile terminal |
| CN105469022A (en) * | 2014-09-11 | 2016-04-06 | 联想(北京)有限公司 | Fingerprint registration method and system and electronic equipment |
| CN105487784A (en) * | 2015-11-25 | 2016-04-13 | 上海斐讯数据通信技术有限公司 | Control method and device of electronic terminal, terminal and system |
| CN105631283A (en) * | 2015-07-31 | 2016-06-01 | 宇龙计算机通信科技(深圳)有限公司 | Biological characteristic based self-learning method and mobile terminal |
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| WO2016115940A1 (en) * | 2015-01-23 | 2016-07-28 | 深圳市汇顶科技股份有限公司 | Fingerprint information dynamic updating method and fingerprint recognition apparatus |
| CN105989333A (en) * | 2015-02-12 | 2016-10-05 | 深圳市汇顶科技股份有限公司 | Fingerprint authentication method, fingerprint authentication system and terminal supporting fingerprint authentication function |
| CN106021606A (en) * | 2016-06-21 | 2016-10-12 | 广东欧珀移动通信有限公司 | Fingerprint template updating method and terminal equipment |
| CN106033536A (en) * | 2014-11-21 | 2016-10-19 | 神盾股份有限公司 | Method and electronic device for updating the registered fingerprint datasets of fingerprint recognition |
| CN106295475A (en) * | 2015-05-29 | 2017-01-04 | 北京东方金指科技有限公司 | A kind of based on sum of ranks than the registered fingerprint replacement method of method |
| WO2017020168A1 (en) * | 2015-07-31 | 2017-02-09 | 宇龙计算机通信科技(深圳)有限公司 | Fingerprint recognition method and device |
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| WO2017080291A1 (en) * | 2015-11-13 | 2017-05-18 | 广东欧珀移动通信有限公司 | Fingerprint recognition method, method and device for updating fingerprint template, and mobile terminal |
| CN106716446A (en) * | 2015-07-01 | 2017-05-24 | 指纹卡有限公司 | Fingerprint authentication with template updating |
| CN106845198A (en) * | 2017-01-23 | 2017-06-13 | 宇龙计算机通信科技(深圳)有限公司 | A kind of method and apparatus of fingerprint authentication |
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