Method for reinforcing fingerprint image based on one-dimensional filtering
A fingerprint image and fingerprint technology, applied in the field of image processing, can solve the problem of slow calculation speed of Algorithm 4
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[0070] The method of the present invention is implemented in VC6.0 software, and the fingerprint image is obtained by a CMOS pressure-sensitive sensor. The average time to complete a fingerprint image enhancement in PC Intel Celeron 1.0GHZ with VC6.0 is 0.6s.
[0071] A specific implementation example of the present invention is given below.
[0072] It should be noted that the parameters in the following examples do not affect the generality of this patent.
[0073] 1. Collect the fingerprint image, and use the method of step 1-step 3 to cut and stretch the image.
[0074] 2. Smooth the fingerprint image with a Gaussian filter, where the size of the Gaussian template is 3×3 and the standard deviation is 0.5.
[0075] 3. Calculate the horizontal and vertical first-order difference images of the fingerprint image.
[0076] 4. Calculate the structure tensor for each pixel of the fingerprint image, where the size of the Gaussian template is 5×5, and the standard deviation is 5...
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