Fingerprint information dynamic update method and fingerprint identification device

Abstract

The present invention discloses a fingerprint information dynamic update method and a fingerprint identification device. The method comprises the steps: collecting fingerprint information, and performing fingerprint identification according to the collected fingerprint information and a fingerprint template database registered in advance; determining whether the fingerprint identification template database is saturated or not after the fingerprint identification is successful; if the fingerprint identification template database is not saturated, and when the collection fingerprint information satisfies a first update condition, adding the collected fingerprint information into the fingerprint template database; and if the fingerprint identification template database has been saturated, and when the collected fingerprint information satisfies a second update condition, selecting the object fingerprint information from the fingerprint template database, and replacing the collected fingerprint information with the object fingerprint information. Therefore, the dynamic update of the fingerprint information in the fingerprint template database is realized in the usage process of the fingerprint identification device, so that the accuracy of the fingerprint identification is enhanced, the misjudgment rate of the fingerprint identification device is reduced in different usage environments and the user's use experience is improved.

Description

technical field [0001] The invention relates to the technical field of fingerprint identification, in particular to a method for dynamically updating fingerprint information and a fingerprint identification device. Background technique [0002] As a highly secure biometric technology, fingerprint recognition has been widely used in various fields. Especially in the field of smart phones, fingerprint recognition technology has been applied to identity verification and password management, so that the user's personal information is safely protected, and it also brings convenient operation to the user. [0003] For small-area push-type fingerprint sensors applied to smartphones, traditional fingerprint recognition methods are not suitable. Because only part of the fingerprint information of the finger can be obtained during the registration process and stored in the fingerprint template database as a reference template for fingerprint identification, and the fingerprint inform...

AI Technical Summary

Problems solved by technology

Because only part of the fingerprint information of the finger can be obtained during the registration process and stored in the fingerprint template database as a reference template for fingerprint identification, and the fingerprint information in the fingerprint template database is fixed. When the information is outside the registration area, since the fingerprint template database does not contain fingerprint information outside the registration area, the fingerprint identification device will judge that the fingerprint identification has failed, resulting in misjudgment, which affects the accuracy of fingerprint identification.

Especially in different usage environments (such as changing seasons), the user's fingerprint information will change and be different from the fingerprint information in the fingerprint template database, which will increase the probability of misjudgment

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