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公开(公告)号：DE69721951D1
公开(公告)日：2003-06-18
申请号：DE69721951
申请日：1997-12-05
Applicant: IBM
Inventor： CALIFANO ANDREA , COLVILLE SCOTT ERIC , GERMAIN ROBERT STEVEN
Abstract: The method and apparatus of the present invention provide for automatic recognition of fingerprint images. In an acquisition mode, subsets of the feature points for a given fingerprint image are generated in a deterministic fashion. One or more of the subsets of feature points for the given fingerprint image is selected. For each selected subset, a key is generated that characterizes the fingerprint in the vicinity of the selected subset. A multi-map entry corresponding to the selected subset of feature points is stored and labelled with the corresponding key. In the recognition mode, a query fingerprint image is supplied to the system. The processing of the acquisition mode is repeated in order to generate a plurality of keys associated with a plurality of subsets of feature points of the query fingerprint image. For each key generated in the recognition mode, all entries in the multi-map that are associated with this key are retrieved. For each item retrieved, a hypothesized match between the query fingerprint image and the reference fingerprint image is constructed. Hypothesized matches are accumulated in a vote table. This list of hypotheses and scores stored in the vote table are preferably used to determine whether a match to the query fingerprint image is stored by the system.
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公开(公告)号：DE69721951T2
公开(公告)日：2004-05-19
申请号：DE69721951
申请日：1997-12-05
Applicant: IBM
Inventor： CALIFANO ANDREA , COLVILLE SCOTT ERIC , GERMAIN ROBERT STEVEN
Abstract: The method and apparatus of the present invention provide for automatic recognition of fingerprint images. In an acquisition mode, subsets of the feature points for a given fingerprint image are generated in a deterministic fashion. One or more of the subsets of feature points for the given fingerprint image is selected. For each selected subset, a key is generated that characterizes the fingerprint in the vicinity of the selected subset. A multi-map entry corresponding to the selected subset of feature points is stored and labelled with the corresponding key. In the recognition mode, a query fingerprint image is supplied to the system. The processing of the acquisition mode is repeated in order to generate a plurality of keys associated with a plurality of subsets of feature points of the query fingerprint image. For each key generated in the recognition mode, all entries in the multi-map that are associated with this key are retrieved. For each item retrieved, a hypothesized match between the query fingerprint image and the reference fingerprint image is constructed. Hypothesized matches are accumulated in a vote table. This list of hypotheses and scores stored in the vote table are preferably used to determine whether a match to the query fingerprint image is stored by the system.
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公开(公告)号：SG71122A1
公开(公告)日：2000-03-21
申请号：SG1998001311
申请日：1998-06-08
Applicant: IBM
Inventor： BOLLE RUDOLF MAARTIN , GERMAIN ROBERT STEVEN , GARWIN RICHARD LAWRENCE , LEVINE JAMES LEWIS , PANKANTI SHARATHCHANDRA UMAPAT , RATHA NALINI KANTA , SCHAPPERT MICHAEL ALAN
Abstract: A computer system and method determines the force and/or torque applied during the image acquisition stage of a biometric characteristic. Images with very high or very low pressure or high shear torque are rejected and user/operator is notified to re-acquire the image. Alternatively, the application of force and torque by the subject is restricted mechanically so that the images are acquired while the force and/or torque are within acceptable ranges.
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