Fingerprint image enhancement method, fingerprint identification method and application program starting method

Abstract

The embodiment of the invention discloses a fingerprint image enhancement method, a fingerprint identification method and an application program starting method, and the method comprises the steps: eliminating the background texture of a current frame of fingerprint image, and obtaining a pure fingerprint image; performing first preprocessing on the pure fingerprint image to obtain a first preprocessed image; obtaining an effective area of the first preprocessed image; performing direction field estimation and direction field correction on the effective area; and carrying out second preprocessing on the effective region subjected to direction field correction to obtain a fingerprint enhanced image. Through the method of the embodiment, the number of fingerprint acquisition times is reduced, the quality of the fingerprint image is improved, the complexity of fingerprint acquisition is reduced, the fingerprint unlocking efficiency is improved, and the user experience is improved.

Description

Technical field [0001] The embodiment of the present invention relates to image processing and terminal application technology, in particular to a method for fingerprint image enhancement, fingerprint identification and application startup. Background technique [0002] With the development of mobile terminals (such as mobile phones) from feature phones to smart phones, the unlocking methods of mobile terminals are also constantly changing, from the earliest unlocking methods based on digital passwords or patterns to fingerprints, human faces, The biometric unlocking method based on iris has changed. While technological breakthroughs continue, the convenience and security of unlocking have also been greatly improved. [0003] Nowadays, the under-screen fingerprint unlocking solution has the advantages of beautiful, convenient, fast unlocking speed, and conforming to user habits, and has become one of the mainstream ways of unlocking mobile phones. However, in most of the current ...

AI Technical Summary

Problems solved by technology

However, in most of the current under-screen fingerprint unlocking solutions, due to reasons such as unclear, incomplete or deformed fingerprint images collected, users need to repeatedly place their fingers in the fingerprint collection area during registration to collect partial fingerprints multiple times. It is cumbersome, and the unlocking efficiency is low due to the quality problem of the fingerprint image when unlocking, which seriously affects the user experience.

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