The present application relates to the field of self-service settlement
machine, especially to a kind of fast identification method and device for
palm vein based on multi-level feature index, the method first extracts the
palm vein feature of user
palm vein image, then in response to the input of user search code, user search code and palm
vein feature are input into the
database based on multi-level index architecture to carry out hierarchical indexing, obtain index comparison image, then, user palm
vein image and index comparison image are compared, and similarity is obtained, finally, whether the similarity is higher than threshold value is judged, if yes, it is determined that user identity
authentication is passed.Compared with prior art, the
image matching efficiency of the method of the present application is higher, and the indexing of
user privacy information such as gender, age,
telephone number is not involved throughout, which can better ensure the security of
user privacy information.