Invention Grant
- Patent Title: Method and apparatus for recognizing fingerprint ridge point
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Application No.: US15841055Application Date: 2017-12-13
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Publication No.: US10558841B2Publication Date: 2020-02-11
- Inventor: Hongfa Wang
- Applicant: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
- Applicant Address: CN Shenzhen
- Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
- Current Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
- Current Assignee Address: CN Shenzhen
- Agency: Anova Law Group, PLLC
- Priority: CN201510566721 20150908
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G06T5/20

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.
Public/Granted literature
- US20180101710A1 METHOD AND APPARATUS FOR RECOGNIZING FINGERPRINT RIDGE POINT Public/Granted day:2018-04-12
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