Optical fingerprint identification device with living body scanning function and identification method

Abstract

The invention discloses an optical fingerprint identification device with living body scanning function and an optical fingerprint identification method for identifying fingerprint characteristics of a living body and stably and securely performing fingerprint authentication. Two kinds of different colored light with different penetrability are alternately used for assisting in capturing the characteristics of a finger to identify the truth of the finger and capturing fingerprint images of the same finger on different levels to further assist the identification; a red light source can be used for assisting in capturing a surface image of the fingerprints, and a blue-green light source can be used for assisting in capturing a capillary vessel image on the lower layer of the surface of the fingerprints, so that the fingerprints are from the living body or counterfeited silica gel fingerprints can be judged according to the capillary vessel image and the fingerprint surface image; and on the other hand, because more than two images of the same finger can be captured, the comparison characteristics of the same finger can be increased, and the accuracy of identification is increased.

Description

technical field [0001] The present invention relates to an optical fingerprint identification device and an identification method with a living body scanning function, in particular to an identification device and an identification method that can identify whether the source of a fingerprint is a fingerprint of a human body. Background technique [0002] The technology of authenticating personal information by using the characteristics of the human body has been widely used in various security-related systems, among which, the research and development of fingerprint authentication has been going on in the past. A technology that can authenticate an identity just by pressing a finger on the identification chip is obviously very convenient, but at the same time, there are also variables and uneasiness in actual operation due to different specific situations. [0003] The general optical fingerprint recognition machine on the market adopts 2D camera method. The optical sensor u...

AI Technical Summary

Problems solved by technology

[0004] In actual application of optical fingerprint recognition devices in the prior art, fingers that are too wet or dry may not be recognized correctly (this is also indicated in some operating manuals). In addition, there are The danger of successful identification by using artificially copied fingerprints, and in the existing technology, fingerprints left on glass and silica gel can be successfully copied from other people's fingerprints, which is very important for the security of the fingerprint identification device in the prior art sex is definitely a challenge

[0005] Since the optical fingerprint identification device of the prior art does not have the function of living body sensing, the artificially manufactured and reproduced transparent glue fingerprint can fool the existing fingerprint identification device and pass the identification, which is very important for the safety of the user. a serious threat

[0006] On the other hand, the probability of human fingerprints leaving a complete fingerprint is quite low, and the accuracy of the identification results is often affected by variables such as the softness of fingers, the depth of fingerprints, and the humidity. to be further improved

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