Method for enhancing fingerprint image recognition
A fingerprint image and fingerprint technology, which is applied in the field of enhanced fingerprint image recognition, can solve problems such as high system misrecognition rate and rejection rate, immature fingerprint classification method, and difficult definition matching degree of fingerprint image quantification
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[0021] A method for enhancing fingerprint image recognition, comprising: (1) utilizing a Gabor filter to realize enhancement of the fingerprint image; (2) grayscale variance, variance gradient, gradient modulus and low grayscale pixels of the fingerprint grayscale image (3) Introduce the linear combination feature of variance and gradient modulus, select the appropriate threshold value according to the relationship between this feature and the mean value, and initially distinguish the foreground area and background area of the fingerprint; (4) Use mathematical morphology Opening and closing operations are used for post-segmentation processing to obtain accurate and complete fingerprint foreground areas.
[0022] The image enhancement method is: (1) divide the fingerprint image into blocks and extract the local spectral information of each block through windowed Fourier transform; (2) filter the transformed spectrum with a corresponding Gabor filter; (3) ) using inverse Fouri...
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