Double-chip integrated device of intelligent lock fingerprint identification function unit

Abstract

The invention belongs to the technical field of intelligent locks, and provides a double-chip integrated device of an intelligent lock fingerprint identification functional unit. The invention adopts STM32 and TMS320C6748 as a controller and an arithmetic processor, has the characteristics of high expansibility and high arithmetic capability, and both STM 32 and DSP have the characteristics of small size, light weight and low power consumption. A capacitive fingerprint sensor can discriminate the fingerprint activity, and the safety is ensured; the communication error between the STM32 and the TMS320C6748 is less; the fingerprint identification algorithm is free of noise reduction and filtering processing processes, the algorithm is concise and quick in identification, the condition that a plurality of collected fingerprint lines are broken can be well recovered, the number of pseudo feature points in the extracted feature points is small, and the condition that bifurcation points become end points due to poor image processing or collection conditions is tolerated; the triangle matching comparison has high accuracy and is fine in comparison; and the foreground and background of the fingerprint image are accurately segmented and the edges are smooth.

Description

technical field [0001] The invention relates to an integrated device of a dual-chip intelligent lock fingerprint identification functional unit. Background technique [0002] With the continuous improvement of living standards, people pay more attention to safety and convenience issues, and the concept of home intelligent system came into being. The so-called smart home is the product of the combination of modern electronic technology, automation technology and communication technology. The solution of replacing traditional door locks with smart locks has gradually become a research hotspot. Fingerprint recognition is a typical recognition method in smart locks. Fingerprint acquisition is mainly based on capacitive fingerprint collection and optical fingerprint collection. Currently, capacitive fingerprint collection is becoming more and more popular. Tend to the mainstream, capacitive fingerprint sensors mostly have the characteristics of small size and small acquisition a...

AI Technical Summary

Problems solved by technology

[0003] However, for the fingerprint identification function part of the smart lock, most manufacturers adopt the architecture scheme of the fingerprint module. The system goes through the process of fingerprint collection, image processing, and fingerprint template reading, and finally runs the fingerprint matching and identification steps. The overall operating speed and matching rate of the system Not high, this pain point greatly affects the experience

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