A fingerprint ridge tracking algorithm is proposed. This algorithm tracks the entire fingerprint ridge according to the change of the grayscale (gradient) value of the center point on the fingerprint ridge. This method is used to directly calculate the center point on the fingerprint ridge and connect them according to the change of the grayscale (gradient) of the center point, so as to directly calculate the fingerprint refinement image in the original image, reducing the image preprocessing process. At the same time, the broken lines can be connected according to the tracking of the center point to improve the processing accuracy.
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