CN105303176A - Fingerprint template updating method and device - Google Patents

Abstract

The invention discloses a fingerprint template updating method and a fingerprint template updating device, wherein the method comprises the following steps: matching the first fingerprint information input by the user with a fingerprint template pre-stored in a fingerprint database; if the first fingerprint information is successfully matched, determining whether new fingerprint characteristic information which does not exist in the fingerprint template exists in the first fingerprint information; and if the first fingerprint information contains new fingerprint characteristic information, updating the fingerprint template by using the new fingerprint characteristic information. The embodiment of the invention can improve the accuracy of fingerprint identification.

Description

Method and device for updating fingerprint template

technical field

Embodiments of the present invention relate to the technical field of fingerprint identification, and in particular to a method and device for updating a fingerprint template.

Background technique

With the rapid development of biometric technology, fingerprint recognition is more and more used in business and people's daily life.

In the prior art, the fingerprint feature data is usually collected multiple times for the same finger, and then the fingerprint feature data is simply calculated as an arithmetic mean value to obtain a fingerprint template. Subsequent authentication will only compare the similarity between the collected new fingerprint feature data and the preset fingerprint template. When the similarity exceeds the preset threshold, the fingerprint authentication will pass, and the user will be granted permission to enter the preset fingerprint template. Set up programs or perform related application operations.

However, in practical applications, due to the influence of factors such as irregular movements when collecting fingerprints, foreign objects on the surface of the fingers, and changes in the external temperature environment, the fingerprints collected by this method may eventually form a fixed fingerprint template. When verifying the identity, simply comparing the newly collected fingerprint with the fixed fingerprint template for similarity may result in a high rejection rate and false acceptance rate.

Contents of the invention

Embodiments of the present invention provide a method and device for updating a fingerprint template, so as to improve the accuracy of fingerprint identification.

In a first aspect, an embodiment of the present invention provides a method for updating a fingerprint template, including:

matching the first fingerprint information input by the user with the fingerprint template pre-stored in the fingerprint database;

If the first fingerprint information is successfully matched, determine whether there is new fingerprint feature information that does not exist in the fingerprint template in the first fingerprint information;

If there is new fingerprint feature information in the first fingerprint information, update the fingerprint template with the new fingerprint feature information.

In a second aspect, the embodiment of the present invention also provides a device for updating a fingerprint template, including:

A fingerprint matching module, configured to match the first fingerprint information input by the user with the fingerprint template pre-stored in the fingerprint library;

A new fingerprint feature determination module, configured to determine whether there is new fingerprint feature information that does not exist in the fingerprint template in the first fingerprint information after the fingerprint matching module determines that the first fingerprint information is successfully matched;

A fingerprint update module, configured to use the new fingerprint feature information to update the fingerprint template after the new fingerprint feature determination module determines that there is new fingerprint feature information in the first fingerprint information.

In the embodiment of the present invention, the first fingerprint information input by the user is matched with the fingerprint template pre-stored in the fingerprint library; if the first fingerprint information is successfully matched, it is determined whether the fingerprint template exists in the first fingerprint information new fingerprint feature information that does not exist in the first fingerprint information; if there is new fingerprint feature information in the first fingerprint information, update the fingerprint template with the new fingerprint feature information. In the embodiments of the present invention, by updating the fingerprint template with new fingerprint feature information, the fingerprint feature information in the fingerprint template is enriched, thereby improving the accuracy of fingerprint identification.

Description of drawings

FIG. 1 is a schematic flow chart of a method for updating a fingerprint template provided by Embodiment 1 of the present invention;

FIG. 2 is a schematic flow chart of a method for updating a fingerprint template provided in Embodiment 2 of the present invention;

FIG. 3 is a schematic flow diagram of a method for updating a fingerprint template provided by Embodiment 3 of the present invention;

FIG. 4 is a schematic structural diagram of an apparatus for updating a fingerprint template provided by Embodiment 4 of the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

The execution subject of the fingerprint template updating method provided in the embodiment of the present invention may be the fingerprint template updating device provided in the embodiment of the present invention, or a terminal device (for example, a smart phone, a tablet computer, etc.) integrating the fingerprint template updating device, The device for updating the fingerprint template can be realized by means of hardware or software.

Embodiment one

Fig. 1 is a schematic flow chart of the fingerprint template updating method provided by Embodiment 1 of the present invention, as shown in Fig. 1 , specifically including:

Step 11, matching the first fingerprint information input by the user with the fingerprint template pre-stored in the fingerprint database;

For example, a fingerprint collection template can be set on the fingerprint template updating device, and the first fingerprint information input by the user can be obtained through the fingerprint collection template. Wherein, the fingerprint template includes texture information of the user's fingerprint.

Specifically, if the first fingerprint information is successfully matched, step 12 is performed; otherwise, step 14 is performed.

Step 12. Determine whether there is new fingerprint feature information that does not exist in the fingerprint template in the first fingerprint information;

Specifically, because the finger movements cannot be the same each time the fingerprint is collected, there are foreign objects on the surface of the finger, and the external temperature environment changes and other factors, the first fingerprint information collected is likely to contain information that does not exist in the fingerprint template. Some fingerprint information. If there is new fingerprint feature information in the first fingerprint information, go to step 13, otherwise go to step 14.

Step 13, using the new fingerprint feature information to update the fingerprint template;

Specifically, when updating, the first fingerprint information may be used to replace the fingerprint template.

Step 14, refusing to update the fingerprint template.

In this embodiment, the first fingerprint information input by the user is matched with the fingerprint template pre-stored in the fingerprint database; if the first fingerprint information is successfully matched, it is determined whether the fingerprint template exists in the first fingerprint information New fingerprint feature information that does not exist; if there is new fingerprint feature information in the first fingerprint information, update the fingerprint template with the new fingerprint feature information. In this embodiment, by updating the fingerprint template with new fingerprint feature information, the fingerprint feature information in the fingerprint template is enriched, thereby improving the accuracy of fingerprint identification.

Exemplarily, on the basis of the above embodiments, after using the new fingerprint feature information to update the fingerprint template, it also includes:

collecting the second fingerprint information input by the user;

The second fingerprint information is matched with the updated fingerprint template, and an identity verification result is determined according to the matching result.

Specifically, since the updated fingerprint template contains more fingerprint feature information, in subsequent fingerprint verification, using the updated fingerprint template for matching can further improve the verification rate. After using the second fingerprint information to match the updated fingerprint template, if the matching is successful, further determine whether there is new fingerprint feature information in the second fingerprint information that does not exist in the fingerprint template, if the second If there is new fingerprint feature information in the fingerprint information, then use the new fingerprint feature information again to update the fingerprint template. By analogy, each time the matching is successful, the fingerprint template is updated to enrich the fingerprint feature information in the fingerprint template, thereby improving the accuracy of fingerprint identification.

Exemplarily, the embodiment of the present invention also provides a method for generating a fingerprint template. Specifically, before the first fingerprint information input by the user is matched with the fingerprint template pre-stored in the fingerprint database, the method further includes:

Collect the third fingerprint information of the user;

Extracting fingerprint feature information in the third fingerprint information to form a fingerprint template;

The fingerprint template is stored in the fingerprint library.

Exemplarily, the fingerprint feature information includes overall features and detailed features of the fingerprint;

The overall features include at least one of bow, arc, skip, bucket and miscellaneous;

The detailed features include the fine structure and specific shape of the mastoid line.

Among them, the detailed features include the start point, end point, small point and short stick of the mastoid line.

Exemplarily, the above embodiments also match the first fingerprint information input by the user with the fingerprint template pre-stored in the fingerprint library; if the first fingerprint information is successfully matched, determine whether the first fingerprint information is There is new fingerprint feature information that does not exist in the fingerprint template; if there is new fingerprint feature information in the first fingerprint information, then use the new fingerprint feature information to update the fingerprint template, so that the fingerprint template in the fingerprint template The fingerprint feature information is richer, which can also improve the accuracy of fingerprint recognition.

Embodiment two

Figure 2 is a schematic flow diagram of the fingerprint template updating method provided by Embodiment 2 of the present invention. On the basis of the above-mentioned Embodiment 1, this embodiment further uses the updated fingerprint template for matching related processes, as shown in Figure 2, specifically including Follow the steps below:

Step 21, matching the first fingerprint information input by the user with the fingerprint template pre-stored in the fingerprint database;

If the first fingerprint information is successfully matched, perform step 22, otherwise perform step 24.

Step 22. Determine whether there is new fingerprint feature information that does not exist in the fingerprint template in the first fingerprint information;

If there is new fingerprint feature information in the first fingerprint information, go to step 23, otherwise go to step 24.

Step 23, using the new fingerprint feature information to update the fingerprint template, and perform step 25;

Step 24, refusing to update the fingerprint template;

Step 25, collect the second fingerprint information input by the user, and execute step 26;

Step 26. Match the second fingerprint information with the updated fingerprint template, and determine the identity verification result according to the matching result.

The embodiment of this embodiment also matches the first fingerprint information input by the user with the fingerprint template pre-stored in the fingerprint library; if the first fingerprint information is successfully matched, determine whether the first fingerprint information exists in the first fingerprint information New fingerprint feature information that does not exist in the fingerprint template; if there is new fingerprint feature information in the first fingerprint information, then use the new fingerprint feature information to update the fingerprint template, so that the fingerprint feature information in the fingerprint template It is richer, and in the subsequent identification, the fingerprint feature information in the updated fingerprint template is used for matching, thereby improving the accuracy of fingerprint identification.

Embodiment Three

Fig. 3 is a schematic flow diagram of the fingerprint template update method provided by Embodiment 3 of the present invention. On the basis of the above-mentioned Embodiment 1, this embodiment further includes the related flow of establishing a fingerprint template, as shown in Fig. 3 , specifically including the following steps:

Step 31, collecting the third fingerprint information of the user;

Step 32, extracting the fingerprint feature information in the third fingerprint information to form a fingerprint template;

Step 33, storing the fingerprint template in the fingerprint library;

Step 34, matching the first fingerprint information input by the user with the fingerprint template pre-stored in the fingerprint database;

If the first fingerprint information is successfully matched, perform step 35, otherwise perform step 37.

Step 35. Determine whether there is new fingerprint feature information that does not exist in the fingerprint template in the first fingerprint information;

If there is new fingerprint feature information in the first fingerprint information, go to step 36, otherwise go to step 37.

Step 36, using the new fingerprint feature information to update the fingerprint template;

Step 37: Refuse to update the fingerprint template.

The embodiment of this embodiment also matches the first fingerprint information input by the user with the fingerprint template pre-stored in the fingerprint library; if the first fingerprint information is successfully matched, determine whether the first fingerprint information exists in the first fingerprint information New fingerprint feature information that does not exist in the fingerprint template; if there is new fingerprint feature information in the first fingerprint information, then use the new fingerprint feature information to update the fingerprint template, so that the fingerprint feature information in the fingerprint template More abundant, thereby improving the accuracy of fingerprint recognition.

Embodiment four

FIG. 4 is a schematic structural diagram of a fingerprint template updating device provided in Embodiment 4 of the present invention, as shown in FIG. 4 , specifically comprising: a fingerprint matching module 41, a new fingerprint feature determination module 42, and a fingerprint updating module 43;

The fingerprint matching module 41 is used to match the first fingerprint information input by the user with the fingerprint template pre-stored in the fingerprint database;

The new fingerprint feature determination module 42 is used to determine whether there is new fingerprint feature information that does not exist in the fingerprint template in the first fingerprint information after the fingerprint matching module 41 determines that the first fingerprint information is successfully matched;

The fingerprint update module 43 is configured to update the fingerprint template with the new fingerprint feature information after the new fingerprint feature determination module 42 determines that there is new fingerprint feature information in the first fingerprint information.

The fingerprint template updating device described in this embodiment is used to execute the fingerprint template updating methods described in the above-mentioned embodiments, and its technical principles and technical effects are similar, and will not be repeated here.

Exemplarily, on the basis of the above embodiments, the device further includes: a first fingerprint collection module 44;

The first fingerprint collection module 44 is used to collect the second fingerprint information input by the user after the fingerprint update module 43 uses the new fingerprint feature information to update the fingerprint template;

The fingerprint matching module 41 is also used to match the second fingerprint information with the updated fingerprint template, and determine the identity verification result according to the matching result.

Exemplarily, on the basis of the above embodiments, the device further includes: a second fingerprint collection module 45, a fingerprint extraction module 46 and a fingerprint storage module 47;

The second fingerprint collection module 45 is used to collect the third fingerprint information of the user before the fingerprint matching module 41 matches the first fingerprint information input by the user with the fingerprint template pre-stored in the fingerprint library;

The fingerprint extraction module 46 is used to extract the fingerprint feature information in the third fingerprint information to form a fingerprint template;

The fingerprint storage module 47 is used to store the fingerprint template in the fingerprint library.

Exemplarily, on the basis of the above-mentioned embodiments, the fingerprint feature information includes the overall features and detailed features of the fingerprint;

The overall features include at least one of bow, arc, skip, bucket and miscellaneous;

The detailed features include the fine structure and specific shape of the mastoid line.

Exemplarily, on the basis of the above embodiments, the fingerprint matching module 41 is further configured to refuse to update the fingerprint template if the matching of the first fingerprint information fails.

The fingerprint template update device described in the above embodiments is also used to execute the fingerprint template update method described in the above embodiments, and its technical principles and technical effects are similar and will not be repeated here.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims (10)

1. a fingerprint template update method, is characterized in that, comprising:

The first finger print information according to user's input mates with the fingerprint template be stored in advance in fingerprint base;

If the match is successful for described first finger print information, determine in described first finger print information, whether to there is non-existent new fingerprint feature information in described fingerprint template;

If there is new fingerprint feature information in described first finger print information, then described new fingerprint feature information is used to upgrade described fingerprint template.

2. method according to claim 1, is characterized in that, uses after described new fingerprint feature information upgrades described fingerprint template, also comprises:

Gather the second finger print information of user's input;

By described second finger print information with upgrade after fingerprint template mate, to determine one's identity the result according to matching result.

3. method according to claim 1, is characterized in that, before mating, also comprises according to the first finger print information of user's input with the fingerprint template be stored in advance in fingerprint base:

Gather the 3rd finger print information of user;

Extract the fingerprint feature information in described 3rd finger print information, form fingerprint template;

Described fingerprint template is stored in described fingerprint base.

4. the method according to any one of claims 1 to 3, is characterized in that, described fingerprint feature information comprises global feature and the minutia of fingerprint;

Described global feature comprises at least one in arc, arc, dustpan shape, bucket shape and assorted shape;

Described minutia comprises small structure and the concrete form of mastoid process streakline.

5. the method according to any one of claims 1 to 3, is characterized in that, also comprises: if it fails to match for described first finger print information, then refuse to carry out update process to described fingerprint template.

6. a fingerprint template updating device, is characterized in that, comprising:

Fingerprint matching module, mates with the fingerprint template be stored in advance in fingerprint base for the first finger print information inputted according to user;

New fingerprint characteristic determination module, after determining the first finger print information at described fingerprint matching module the match is successful, determines whether there is non-existent new fingerprint feature information in described fingerprint template in described first finger print information;

Fingerprint update module, for after described new fingerprint characteristic determination module determines to there is new fingerprint feature information in described first finger print information, uses described new fingerprint feature information to upgrade described fingerprint template.

7. device according to claim 6, is characterized in that, described device also comprises:

First finger print acquisition module, after upgrading described fingerprint template at the described new fingerprint feature information of described fingerprint update module use, gathers the second finger print information of user's input;

Described fingerprint matching module, also for by described second finger print information with upgrade after fingerprint template mate, to determine one's identity the result according to matching result.

8. device according to claim 6, is characterized in that, described device also comprises:

Second finger print acquisition module, before mating, gathers the 3rd finger print information of user for the first finger print information of inputting according to user at described fingerprint matching module with the fingerprint template be stored in advance in fingerprint base;

Fingerprint extraction module, for extracting the fingerprint feature information in described 3rd finger print information, forms fingerprint template;

Fingerprint storage module, for being stored in described fingerprint template in described fingerprint base.

9. the device according to any one of claim 6 ~ 8, is characterized in that, described fingerprint feature information comprises global feature and the minutia of fingerprint;

Described global feature comprises at least one in arc, arc, dustpan shape, bucket shape and assorted shape;

Described minutia comprises small structure and the concrete form of mastoid process streakline.

10. the device according to any one of claim 6 ~ 8, is characterized in that, described fingerprint matching module, if also for described first finger print information, it fails to match, then refuses to carry out update process to described fingerprint template.