Fingerprint recognition is currently the most widely used method of intelligent locks. Clock in and out, unlock mobile phones, lock doors, etc. So how is the fingerprint recognition function of the intelligent fingerprint lock implemented?
With the continuous development and maturity of fingerprint recognition technology, the door lock also uses fingerprint recognition technology, and from then on, intelligent fingerprint door locks began to emerge. Intelligent door locks significantly improve the safety and convenience of door locks by applying fingerprint recognition function. So how is the fingerprint recognition function of fingerprint door locks achieved?
The so-called fingerprint refers to the patterns on the surface of the human fingertips, and fingerprint recognition mainly involves the following three processes:
1.fingerprint enhancement:
In the process of fingerprint collection, due to various reasons, the collected fingerprint images inevitably introduce some noise. If directly used for fingerprint recognition, it is often difficult to achieve good results. Therefore, we can improve the quality of fingerprint images through certain image enhancement techniques. The techniques used here include image segmentation, histogram equalization, filter enhancement, binarization, thinning, etc.
2.Feature extraction:
Fingerprints are a biological feature of the human body, characterized by uniqueness and non replicability. The fingerprint collector compares the collected fingerprints during normal use.
3. Fingerprint matching:
There are many fingerprint matching algorithms, including point pattern matching, ridge pattern matching, image based matching, and graph based matching. Detail point matching can be seen as a problem of point pattern matching. Point pattern matching refers to matching the extracted set of detail points with the set of detail points in the database. If the point sets are matched through some rotation, scale transformation, and translation transformation, then these two fingerprint images are matched.
The implementation of intelligent lock fingerprint recognition function mainly involves the following two methods:
Live fingerprint recognition technology
It can effectively distinguish true and false fingerprints by only producing recognition reactions on live human fingerprints and not identifying all other substances. In general, we can achieve this by using a semiconductor fingerprint collector.
2. Optical fingerprint recognition technology:
The optical recognition of smart locks is an earlier fingerprint recognition technology. Based on the light emitted by optical emission devices, it is projected onto the fingers and then reflected back to the machine to obtain data, and compared with the database to see if it is consistent.
The Kebel fingerprint door lock adopts advanced biometric technology, which can quickly and normally identify fingerprints while effectively distinguishing true and false fingerprints.
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