The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2025
Filed:
Jan. 05, 2024
Idemia Identity & Security France, Courbevoie, FR;
Victor Videau, Courbevoie, FR;
Guy Mabyalaht, Courbevoie, FR;
IDEMIA IDENTITY & SECURITY FRANCE, Courbevoie, FR;
Abstract
A method comprising: generating a classification map comprising, for each block forming part of a plurality of blocks of a test image and for each class of a plurality of classes of distances in pixels, a score indicative of a probability of existence in the test image of a segment passing through the block and the length of which in pixels constitutes an inter-ridge distance of a fingerprint included in the class, generating a distance map comprising, for each block of the plurality of blocks, a local inter-ridge distance in pixels estimated for the block, and estimating an average inter-ridge distance in pixels of the test fingerprint on the basis of the inter-ridge distance map, the estimation comprising selecting, from the inter-ridge distance map, local inter-ridge distances of interest according to a criterion of proximity to the class of interest, and computing an average of the local inter-ridge distances of interest.