Method and device for identifying planar fingerprints

The invention discloses a method for identifying planar fingerprints. The method includes the steps: (1) setting a fingerprint information acquisition end; (2) setting an identification storage module connected with the fingerprint information acquisition end; (3) embedding a fingerprint image information processing algorithm into the identification storage module; (4) acquiring a fingerprint image when a camera module detects that a finger presses a finger pressing portion, and taking the fingerprint image as an original comparison image stored into the storage module; (5) processing a later acquired fingerprint image by the aid of the fingerprint image information processing algorithm, extracting characteristic points of the fingerprint image to be identified to obtain the characteristic points of the fingerprint image to be identified, calling out the original image from the storage module, extracting characteristic points of the original image to obtain the characteristic points of the original image, and then comparing and matching the characteristic points of the fingerprint image to be identified and the characteristic points of the original image. The characteristic points of the fingerprint image to be identified are consistent with the characteristic points of the original image when similarities between the characteristic points are larger than or equal to 90%. The invention further discloses a device implementing the method.