High-resolution photoacoustic microscopic imaging identity recognition system and recognition method thereof

Abstract

The invention provides a high-resolution photoacoustic microscopic imaging identity recognition system and a recognition method thereof. The high-resolution photoacoustic microscopic imaging identity recognition system comprises an excitation light source, a detection light source, a first beam splitter, a second beam splitter, a two-dimensional scanning galvanometer, a scanning lens, a compression lens, a flat plate, a lower glass plate, a vibration film, an upper glass plate, a photoelectric detector and a central processing unit. The high-resolution photoacoustic microscopic imaging identity recognition system perform imaging on a space geometric structure of a subcutaneous blood vessel network by using a photoacoustic technology, the spatial resolution can reach up to hundreds of nanometers, and a high-precision two-dimensional or three-dimensional blood vessel network structure image can enable the accuracy of identity recognition to be greatly improved.

Description

technical field [0001] The invention relates to the field of biological feature identification, in particular to a high-resolution photoacoustic microscopic imaging identification system and identification method thereof. Background technique [0002] Document 1 (CN 101004789 B) discloses a finger vein image recognition method, which uses image and morphological algorithms to obtain clearer vein images to improve recognition accuracy. The disadvantage is that for the existing high-precision two-dimensional vein map and three-dimensional vein fingerprints, it is impossible to determine whether it is the person. [0003] Document 2 (CN 103617419 A) discloses a finger vein recognition device with a living finger detection function, which uses infrared pulse detection to determine whether the detected object is a living finger. The disadvantage is that the pulse signal of the subcutaneous blood vessels of the finger is very weak, and it is impossible to determine whether the li...

AI Technical Summary

Problems solved by technology

The disadvantage is that for the existing high-precision two-dimensional vein map and three-dimensional vein fingerprint, it is impossible to determine whether it is the person

The disadvantage is that the pulse signal of the subcutaneous blood vessels of the finger is very weak, and it is impossible to determine whether the living finger with the planar vein map is the real person, which has a high rate of misjudgment

The disadvantage is that for the fake fingerprint recognition of the three-dimensional vein structure, this method still has a great risk of recognition accuracy

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