Research on Fingerprint Image Based on Improved Log-Gabor Filter Enhancement Algorithm

In biometric identification, the most widely used form was the fingerprint, which has unique and invariable property. The main task of fingerprint enhancement was to restore the structural defects of its ridge. The ultimate goal was to improve the accuracy of fingerprint feature extraction by improving the quality of the ridge, leading to improving the accuracy of fingerprint identification. Based on the fingerprint enhancement algorithms, The Gabor filtering has nice band pass ability in fingerprint enhancement from experimental results, with nice direction and frequency selectivity. Thus, Gabor filtering can effectively remove the noise of the ridge along its direction, also save the true ridge structure. As an improved algorithm, Log-Gabor filter which can make up the defect of Gabor filter improves the final effect of filtering.