Composition and Structure of Fingerprint Identification Technology in Access Control System_ Taigewa

Fingerprint identification technology is more and more used in access control system. On the one hand, fingerprint identification has high safety factor and is convenient and fast without carrying other carriers; On the other hand, thanks to the development of electronic technology and the breakthrough of algorithm, the recognition rate is greatly improved, the practicability is increased, the cost is reduced, and the fingerprint recognition technology is popularized. So, what is the architecture principle of fingerprint identification system? At present, there are many fingerprint identification systems on the market, but their structures are very similar. They are composed of three parts: fingerprint acquisition and classification, fingerprint identification and matching and fingerprint compression storage. Now let's make a brief introduction. 1、 Fingerprint collection and classification fingerprint collection and classification is the first link of fingerprint identification system. Firstly, we need to collect the fingerprint through the optical or COMS fingerprint acquisition machine. Generally, we use the method of twice comparison, that is, compare the fingerprint collected for the first time with the fingerprint collected for the second time, and correspondingly save the information and add it to the fingerprint identification database. If the collected fingerprint is unqualified, the identification device will send a prompt tone to prompt for re collection. This is a measure taken to ensure the quality of fingerprint collection. The purpose of classification is to reduce the search space, improve the recognition speed and facilitate the management of large-capacity fingerprints. The principle is to use the fingerprint analyzer to classify the array formed by the front fingerprint collection according to the ridge and valley flow direction of the fingerprint, which is divided into sharp arch, arch, left ring, right ring, vortex and so on. 2、 The core of fingerprint identification matching fingerprint identification system is algorithm. It can be said that the algorithm largely determines the recognition rate and recognition speed. For example, biokey algorithm has the characteristics of fast and accurate. It adopts one-to-one and one-to-n fingerprint identification algorithms, which can identify 2000 6000 fingerprints in 1 to 5S. 3、 The purpose of fingerprint compression and storage fingerprint compression is to save storage space. Its requirement for the algorithm is to keep the fingerprint detail feature point information as much as possible when compressing the fingerprint image, and the decompression has little impact on the accuracy of extracting fingerprint detail features. Common compression algorithms for fingerprint images include JPEG, WSQ and EZW, which will not be explained one by one here. Well, let's briefly introduce the fingerprint identification system. I hope it will be helpful to you.