Fingerprint identification is almost synonymous with biometric identification because of its lifelong invariance, uniqueness and convenience. Fingerprint refers to the uneven lines on the front skin at the end of human fingers. These lines are regularly arranged to form different patterns. The starting point, ending point, combining point and bifurcation point of ridge line are called minutiae of fingerprint.

The mobile phone equipped with fingerprint identification function can provide the confirmation information of fingerprint uniqueness, among which the most typical ones are endpoints and bifurcation points, others are bifurcation points, isolated points, ring points, short patterns and so on.