Method and apparatus for recognizing fingerprint ridge point
Abstract:
Embodiments of the present disclosure disclose a method for recognizing a fingerprint ridge point. The method includes performing orientation field estimation on a fingerprint image; identifying a pixel in the fingerprint image as a target pixel; determining a ridge direction of the target pixel according to the orientation field estimation, and a normal direction perpendicular to the ridge direction; defining a rectangular region by using the target pixel as a central point, a length of the rectangular region being along the ridge direction, a width of the rectangular region being along the normal direction of perpendicular to the ridge, and the rectangular region comprising multiple pixel rows; calculating a sum of grayscale values of pixels in each pixel row; and determining that the target pixel is a fingerprint ridge point when the sum of grayscale values corresponding to a pixel row that includes the target pixel is the minimum.
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