Image enhancement method in automatic fingerprint identification technology
A fingerprint recognition technology and fingerprint image technology, applied in the field of finger fingerprint image enhancement, can solve the problems of high time cost and large influence of edge noise, and achieve the effect of improving the clarity of lines
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[0059] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0060] The image enhancement method in automatic fingerprint recognition technology, firstly, introduces the Gaussian function and the two-dimensional sine model into the fingerprint image enhancement process, constructs a two-dimensional sine filter consistent with the fingerprint texture according to the intrinsic properties of the fingerprint image, and uses The two-dimensional Gaussian function modulates the two-dimensional sinusoidal filter to construct a Gaussian modulated two-dimensional sinusoidal filter. Then, according to the actual needs of fingerprint image enhancement processing, the Gaussian modulated two-dimensional sinusoidal filter is modified to construct a Gaussian modulated two-dimensional sinusoidal filter that meets the actual needs of fingerprint image processing, and then the frequency parameters and direction parameters o...
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