Method for dynamically updating fingerprint information and fingerprint identification device

Abstract

The invention discloses a method for dynamically updating fingerprint information and a fingerprint identification device. The method includes the steps of: collecting fingerprint information, performing fingerprint identification according to the collected fingerprint information and a pre-registered fingerprint template database; after successful fingerprint identification, judging the fingerprint Whether the template database is saturated; when the fingerprint template database is not saturated, and the collected fingerprint information satisfies the first update condition, add the collected fingerprint information to the fingerprint template database; when the fingerprint template database is saturated, and the collected fingerprint information satisfies the first updating condition 2. When updating the conditions, select the target fingerprint information from the fingerprint template database, and replace the target fingerprint information with the collected fingerprint information. In this way, the dynamic update of the fingerprint information in the fingerprint template database is realized during the use of the fingerprint identification device, the accuracy of fingerprint identification is improved, the misjudgment rate of the fingerprint identification device in different usage environments is reduced, and the use efficiency of the user is improved. experience.

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

Images