Fingerprint study: rambling function recognition and technology application status | |

Fingerprint identification technology has made a man with his fingerprint matching, by comparing his fingerprints and preserved, comparing the fingerprints can verify his real identity. Everyone, Including fingerprint) Skin texture on the pattern, breakpoint and intersection each are not identical, that is to say, yes, and a lifetime unchanged. Relying on this and stability, can we create the fingerprint identification technology. Identify fingerprint study the overall characteristics are those characteristic of the human eye can be directly observed. Including grain shape, pattern area, emphasis and the number of triangle points and lines. Grain shape, the fingerprint on the basis of long-term practice, according to the ridge line with the direction of the distribution of the fingerprints are divided into three broad categories & ndash; — Ring ( Loop, also called dou form) , bow ( arch) , spiral ( 螺纹) 。 Pattern area. This includes fingerprint on the overall characteristics of the area, and the area was able to discern the fingerprint is belong to which kind of type. Some fingerprint recognition algorithm using only the data of model area, while others use of complete fingerprint. Emphasis, located in the fingerprint pattern of gradual, it as a reference point when read fingerprints and compare fingerprints. Many of the algorithm is based on the emphasis, which can only handle and fingerprint recognition with emphasis. Triangle points, emphasis the start of a branch point or a breakpoint, or two lines converge at, isolated points, bend over, or pointing in the direction of the singular point. Triangulation point provides a fingerprint lines at the beginning of the count of tracking. Grain number, namely the mode number of fingerprint patterns. When calculating the fingerprints of the grain, general connection first emphasis and triangle points, the connection with the number of fingerprint lines intersecting can be considered a fingerprint on the number of lines. Local characteristics and local characteristics refers to the characteristics of the fingerprints on the node, these have some characteristics of node called detail characteristic or feature points. Two fingerprints often have the same general characteristics, but they are the details of the features, but can't completely the same. Fingerprint is not continuous, smooth, straight grain, but appeared frequently interrupt, bifurcate or twist. These breakpoints, bifurcation point and the turning point is called & quot; Feature points & quot; Is these feature points provides a fingerprint confirmation, which is a typical endpoints and branch point, the other also include differences, isolated points, ring, short lines, etc. The parameters of the feature points include: direction ( Nodes can toward a certain direction) And the curvature ( Describe the velocity of grain direction change , location, The location of the node through the x/y coordinates to describe, can yes, also can be compared with the triangle points or features) 。 Customer service: if you are interested in the fingerprint combination lock or have any questions, please click on the online customer service, contact us page, or call: smart door lock & ndash; — You close the way of purchasing consultant. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Editor: intelligent locks - Network consultant LTD. All rights reserved: ( Smart door lock reprint please indicate the source)
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