Invention Grant
- Patent Title: Method of analyzing a fingerprint
-
Application No.: US16537068Application Date: 2019-08-09
-
Publication No.: US11055506B2Publication Date: 2021-07-06
- Inventor: Iana Iatsun , Laurent Kazdaghli
- Applicant: IDEMIA IDENTITY & SECURITY FRANCE
- Applicant Address: FR Courbevoie
- Assignee: IDEMIA IDENTITY & SECURITY FRANCE
- Current Assignee: IDEMIA IDENTITY & SECURITY FRANCE
- Current Assignee Address: FR Courbevoie
- Agency: Muncy, Geissler, Olds & Lowe, P.C.
- Priority: FR1857460 20180810
- Main IPC: G06K9/00
- IPC: G06K9/00

Abstract:
A method of analyzing a fingerprint, the method comprising the step of acquiring a fingerprint image (20) together with the following steps: performing filtering processing on the fingerprint image to estimate, for each pixel of the fingerprint image, a first frequency of the ridges (21) in the fingerprint, and using the first frequencies associated with the pixels of the fingerprint image to produce a first frequency map (22) of the fingerprint image; subdividing the fingerprint image into a plurality of windows each comprising a plurality of pixels, calculating a Fourier transform for each window in order to estimate a second frequency of the ridges for all of the pixels in said window, and using the second frequencies associated with the pixels of the windows to produce a second frequency map of the fingerprint image; and merging the first frequency map and the second frequency map in order to obtain a map of consolidated frequencies of the fingerprint image.
Public/Granted literature
- US20200050820A1 METHOD OF ANALYZING A FINGERPRINT Public/Granted day:2020-02-13
Information query