ROBUST BIOMETRIC FEATURE EXTRACTION WITH AND WITHO

专利名称：ROBUST BIOMETRIC FEATURE EXTRACTION

WITH AND WITHOUT REFERENCE POINT

发明人：AKKERMANS, Antonius, Hermanus,

Maria,BOUGHORBEL, Sabri,BREEBAART, Dirk,Jeroen,BRUEKERS, Alphons, Antonius, Maria,Lambertus,GOKBERK, Berk,DE GROOT, Koen,Theo, Johan,KELKBOOM, Emile, Josephus,Carlos,KEVENAAR, Thomas, Andreas,Maria,LEMMA, Aweke, Negash

申请号：EP10730232.5申请日：20100617公开号：EP2446394A2公开日：20120502

摘要：A basic idea of the present invention is to selectively employ one of at least twodifferent feature extraction processes when generating a biometric template of anindividual. An individual offers a physiological property, such as a fingerprint, an iris, anear, a face, etc., from which biometric data can be derived, to a sensor of an enrollmentauthority. In the following, the property to be discussed will be fingerprints, even thoughany suitable biometric property may be used. From the fingerprint, a positional referencepoint of the biometric data is derived. The derivation of the positional reference pointmay be accomplished using any appropriate method out of a number of known methods.Such a reference point could be the location of a core, a delta, a weighted average ofminutiae coordinates, or alike. Typically, the reference point includes a core of a

fingerprint expressed as a three-dimensional coordinate denoted by means of xr, yr, andangle alphar. A contribution indicator is calculated for the derived positional referencepoint, and it is determined whether the derived positional reference point can beconsidered reliable. Depending on the reliability of the derived reference point, one ofthe two different feature extraction processes is selected; either the first feature set isextracted using a method which is invariant of the derived reference point, or a method isused taking into account the derived reference point. The better the estimation of thereference point is, the more reliable the reference point-dependent extraction method is.Finally, the biometric template is generated using the extracted first feature set.

申请人：Koninklijke Philips Electronics N.V.

地址：Groenewoudseweg 1 5621 BA Eindhoven NL

国籍：NL

代理机构：Kroeze, Johannes Antonius

更多信息请下载全文后查看