The uniqueness and invariance of fingerprint, as well as the feasibility and practicability of fingerprint identification technology, make fingerprint identification become one of the most popular, convenient and reliable personal identity authentication technology.So how does fingerprint recognition work?Below small make up to introduce the principle of fingerprint identification.
The points formed by interruption, bifurcation or transition in fingerprint are detailed feature points, which can be said to provide unique confirmation information of fingerprint.The typical ones are terminal and bifurcation points and bifurcation points, isolated points, ring points, short lines, etc.By recording the direction of your fingerprint pattern, the location of feature points (determined by the X/Y axis), etc., you can create a unique fingerprint lock in the world, and the key is your fingerprint.
Because the orientation of fingerprint scanning is not exactly the same each time, different points of force will bring different degrees of deformation, and there will be a large number of fuzzy fingerprints, so the key of fingerprint identification technology is to correctly extract features and achieve correct matching.Fingerprint identification involves many subjects such as image processing, pattern recognition and computer vision.
To identify a fingerprint, first set up a fingerprint database, so that your original fingerprint data as the initial identification code.
Fingerprint collection smooth figure.At present, mainly used for fingerprint collection are: living optical, capacitive and pressure sensitive.
Capacitive fingerprint collection view records and verifies fingerprints by identifying fingerprint patterns through contact with skin and screen.
Optically, fingerprints are recorded and validated by light reflection imaging.
Pressure sensing is through sensing semiconductor pressure sensitive material to perceive fingerprint bump and imaging.
After capturing the fingerprint, the fingerprint will be refined to highlight its fingerprint feature points for convenient comparison and verification.
Above is the introduction of fingerprint identification principle.