Publication

Performance Generalization in Biometric Authentication Using Joint User-Specific and Sample Bootstraps

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Performance Generalization in Biometric Authentication Using Joint User-Specific and Sample Bootstraps

Samy Bengio, Norman Hoon Thian Poh

Biometric authentication performance is often depicted by a DET curve. We show that this curve is dependent on the choice of samples available, the demographic composition and the number of users specific to a database. We propose a two-step bootstrap proc ...

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Estimating the Confidence Interval of Expected Performance Curve in Biometric Authentication Using Joint Bootstrap

Samy Bengio, Norman Hoon Thian Poh

Evaluating biometric authentication performance is a complex task because the performance depends on the user set size, composition and the choice of samples. We propose to reduce the performance dependency of these three factors by deriving appropriate co ...

IDIAP2006

Compensating User-Specific Information with User-Independent Information in Biometric Authentication Tasks

Samy Bengio, Norman Hoon Thian Poh

Biometric authentication is a process of verifying an identity claim using a person's behavioral and physiological characteristics. This is in general a binary classification task because a system either accepts or rejects an identity claim. However, a bio ...

IDIAP2005

Improving Fusion with Margin-Derived Confidence In Biometric Authentication Tasks

Samy Bengio, Norman Hoon Thian Poh

This study investigates a new confidence criterion to improve fusion via a linear combination of scores of several biometric authentication systems. This confidence is based on the margin of making a decision, which answers the question, ``after observing ...

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Why Do Multi-Stream, Multi-Band and Multi-Modal Approaches Work on Biometric User Authentication Tasks?

Samy Bengio, Norman Hoon Thian Poh

Multi-band, multi-stream and multi-modal approaches have proven to be very successful both in experiments and in real-life applications, among which speech recognition and biometric authentication are of particular interest here. However, there is a lack o ...

2004

Why Do Multi-Stream, Multi-Band and Multi-Modal Approaches Work on Biometric User Authentication Tasks?

Samy Bengio, Norman Hoon Thian Poh

IDIAP2003

Variance Reduction Techniques in Biometric Authentication

Samy Bengio, Norman Hoon Thian Poh

In this paper, several approaches that can be used to improve biometric authentication applications are proposed. The idea is inspired by the ensemble approach, i.e., the use of several classifiers to solve a problem. Compared to using only one classifier, ...

IDIAP2003

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