june 15th, 2004 biosecure1 biosecure : future of biometrics and evaluations gérard chollet...

June 15th, 2004June 15th, 2004 BioSecureBioSecure 11

BioSecure : BioSecure : Future of Biometrics Future of Biometrics

and Evaluationsand Evaluations

Gérard CHOLLETGérard CHOLLETCNRS-LTCI, GET-ENSTCNRS-LTCI, GET-ENST

European Biometric ForumEuropean Biometric Forum

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OutlineOutline State of affairs (history, tasks, security, State of affairs (history, tasks, security,

forensic,…)forensic,…) Modalities (biological, behavioral, hybrid)Modalities (biological, behavioral, hybrid) Fusion (features, scores, decisions)Fusion (features, scores, decisions) Imposture (occasional, dedicated)Imposture (occasional, dedicated) Evaluations (algorithms, field tests, Evaluations (algorithms, field tests,

ergonomy,…)ergonomy,…) ConclusionsConclusions PerspectivesPerspectives

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HistoryHistory

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Recognition tasksRecognition tasks

Identification (open or closed set)Identification (open or closed set) VerificationVerification IndexingIndexing TrackingTracking Typology (ethny)Typology (ethny)

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Biometric Identity Biometric Identity VerificationVerification

Physical (face, finger, hand, eye, ear,…)Physical (face, finger, hand, eye, ear,…) Behavioral (speech, signature, gait,…)Behavioral (speech, signature, gait,…) Decision cost (FA, FR, priors, costs,…)Decision cost (FA, FR, priors, costs,…) Receiver Operating Characteristic CurveReceiver Operating Characteristic Curve Reference systems (open software)Reference systems (open software) Evaluations (algorithms, field trials, Evaluations (algorithms, field trials,

ergonomy,…)ergonomy,…)

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Biological modalitiesBiological modalities(liveness tests)(liveness tests)

Fingerprints (dummy fingers)Fingerprints (dummy fingers) Palmprints (gloves)Palmprints (gloves) Face, body (morphing)Face, body (morphing) Iris (contact lenses)Iris (contact lenses) RetinaRetina Ears (morphing)Ears (morphing) ADN (processing time)ADN (processing time) ……

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Dummy fingersDummy fingers

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Morphing, avatarsMorphing, avatars

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Behavioral modalitiesBehavioral modalities

Speech (acoustic, lexical, dialect, accent,Speech (acoustic, lexical, dialect, accent,…)…)

Signature (on-line, off-line)Signature (on-line, off-line) Handwriting (on-line, off-line)Handwriting (on-line, off-line) KeystrokeKeystroke Gesture (gait, emotions, tic,…)Gesture (gait, emotions, tic,…) ……

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MotivationsMotivations Augmenter la robustesse des systèmes d’authentification Augmenter la robustesse des systèmes d’authentification

biométrique biométrique Authentification à partir des informations vocales et visuelles :Authentification à partir des informations vocales et visuelles :

Meilleurs taux de reconnaissanceMeilleurs taux de reconnaissance Technologie biométrique toujours bien acceptée, car non intrusiveTechnologie biométrique toujours bien acceptée, car non intrusive

Rendre l’imposture plus difficile :Rendre l’imposture plus difficile : augmentation du coût de l’impostureaugmentation du coût de l’imposture

= =

nouveaux champs d’applicationsnouveaux champs d’applications

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Talking Face RecognitionTalking Face Recognition(hybrid verification)(hybrid verification)

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Acoutic featuresAcoutic features

Short term spectral analysisShort term spectral analysis

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Lip featuresLip features

Tracking lip movementsTracking lip movements

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A talking face modelA talking face model

Using Hidden Markov Models (HMMs)Using Hidden Markov Models (HMMs)

Acoustic parameters

Visual parameters

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ConclusionConclusion

Modélisation spatio-temporel des traits extraits des visages parlants

Apprentissage d’un modèle statistique spécifique aux articulateurs de parole et de la parole d’un client

Acceptation / Rejet de l’identité proclamée basée sur le test du rapport de vraisemblance