Publications by Andrzej Drygajlo

How synthetic fingerprints can improve pre-selection of MCC pairs using local quality measures

A major source of errors in fingerprint recognition systems is poor quality of fingerprints. Local quality of fingerprints plays an important role in these systems to ensure high recognition performance. Recently an improved fingerprint matching method is ...

2015

Discarding low quality Minutia Cylinder-Code pairs for improved fingerprint comparison

Andrzej Drygajlo, Mohammad Hamed Izadi

Local minutiae descriptors such as Minutia Cylinder-Code (MCC) are becoming more popular in modern fingerprint matching systems. The matching performance depends a lot on the fingerprint image quality in global and local levels. Rejecting part of the lowes ...

2015

Palm vein recognition with local texture patterns

Andrzej Drygajlo, Leila Mirmohamadsadeghi

Biometric recognition using the palm vein characteristics is emerging as a touchless and spoof-resistant hand-based means to identify individuals or to verify their identity. One of the open challenges in this field is the creation of fast and modality-dep ...

Inst Engineering Technology-Iet2014

Estimation of cylinder quality measures from quality maps for Minutia-Cylinder Code based latent fingerprint matching

Andrzej Drygajlo, Mohammad Hamed Izadi

Poor quality of fingerprint data is one of the major problems concerning latent fingerprint matching in forensic applications. Local quality of fingerprint plays a very important role in this application field to ensure high recognition performance. Al- th ...

2013

A template privacy protection scheme for fingerprint minutiae descriptors

Andrzej Drygajlo, Leila Mirmohamadsadeghi

It is important in biometric person recognition systems to protect personal data and privacy of users. This paper introduces a new mechanism to revoke and protect fingerprint minutiae information, which can be used in today’s security-aware society. The re ...

2013

Speaker verification in score-ageing-quality classification space

Andrzej Drygajlo, Finnian Paul Kelly

A challenge in automatic speaker verification is to create a system that is robust to the effects of vocal ageing. To observe the ageing effect, a speaker's voice must be analysed over a period of time, over which, variation in the quality of the voice sam ...

Academic Press Ltd- Elsevier Science Ltd2013

Introduction of cylinder quality measure into Minutia Cylinder-Code based fingerprint matching

Andrzej Drygajlo, Leila Mirmohamadsadeghi, Mohammad Hamed Izadi

Poor data quality is responsible for many or even most matching errors in fingerprint recognition systems. It became obvious that particular effort is needed in adaptation of the state-of-the-art minutiae-based fingerprint matching techniques to real-world ...

IEEE2012

Embedding cylinder quality measures into Minutia Cylinder-Code based latent fingerprint matching

Andrzej Drygajlo, Mohammad Hamed Izadi

One of the major problems concerning latent fingerprint matching in forensic applications is the poor quality of fingerprint data. Therefore, local quality assessment of fingerprint images is necessary to ensure high biometric performance in this applicati ...

ACM Press2012

Client-specific A-stack model for adult face verification across aging

Andrzej Drygajlo, Weifeng Li

The problem of time validity of biometricmodels has received only a marginal attention from researchers. In this paper, we propose to manage the aging influence on the adult face verification system by an A-stack age modeling technique, which uses the age ...

2011

The Multiscenario Multienvironment BioSecure Multimodal Database (BMDB)

Jean Hennebert, Jonas Richiardi, Andrzej Drygajlo, Norman Hoon Thian Poh

A new multimodal biometric database designed and acquired within the framework of the European BioSecure Network of Excellence is presented. It is comprised of more than 600 individuals acquired simultaneously in three scenarios: 1) over the Internet, 2) i ...

2010

Static Models of Derivative-Coordinates Phase Spaces for Multivariate Time Series Classification: An Application to Signature Verification

Jonas Richiardi, Andrzej Drygajlo, Krzysztof Kryszczuk

Multivariate time series are sequences, whose order is provided by a time index; thus, most classifiers used on such data treat time as a special quantity, and encode it, structurally in a model. A typical example of such models is the hidden Markov model, ...

Springer-Verlag New York, Ms Ingrid Cunningham, 175 Fifth Ave, New York, Ny 10010 Usa2009

Identification of Aging Faces using A-stack Classification Model

Andrzej Drygajlo, Weifeng Li

The problem of time validity of biometric models has received only a marginal attention from researchers. In this paper, we investigate the aging influence on the classifier scores of genuine client. Our studies show that as age progresses the classifier s ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

Statistical Evaluation of Biometric Evidence in Forensic Automatic Speaker Recognition

Andrzej Drygajlo

Forensic speaker recognition is the process of determining if a specific individual (suspected speaker) is the source of a questioned voice recording (trace). This paper aims at presenting forensic automatic speaker recognition (FASR) methods that provide ...

Springer-Verlag New York, Ms Ingrid Cunningham, 175 Fifth Ave, New York, Ny 10010 Usa2009

Improving biometric verification with class-independent quality information

Andrzej Drygajlo, Krzysztof Kryszczuk

Existing approaches to biometric classification with quality measures make a clear distinction between the single-modality applications and the multi-modal scenarios. This study bridges this gap with Q-stack, a stacking-based classifier ensemble, which use ...

2009

Verification of Aging Faces Using Local Ternary Patterns and Q-Stack Classifier

Andrzej Drygajlo, Weifeng Li

This paper deals with the influence of age progression on the performance of face verification systems. This is a challenging and largely open research problem that deserves more and more attention. Aging affects both the shape of the face and its texture, ...

Springer2009

On Development of Inspection System for Biometric Passports Using Java

Andrzej Drygajlo

Currently it is possible to implement Biometric Passport applets according to ICAO specifications. In this paper. an ePassport Java Card applet, according to ICAO specifications Using the Basic Access Control security, is developed. A system for inspection ...

Springer-Verlag New York, Ms Ingrid Cunningham, 175 Fifth Ave, New York, Ny 10010 Usa2009

On Quality of Quality Measures for Classification

Andrzej Drygajlo, Krzysztof Kryszczuk

In this paper we provide a theoretical discussion of the in)pact of uncertainty in quality measurement oil the expected benefits of including biometric signal quality measures in classification. While all ideal signal quality measure should be a, precise q ...

Springer-Verlag New York, Ms Ingrid Cunningham, 175 Fifth Ave, New York, Ny 10010 Usa2008

Biometrics for Identity Documents and Smart Cards: European Perspective

Andrzej Drygajlo

With an increase in identity fraud and the emphasis on security, there is a growing and urgent need to efficiently identify humans both locally and remotely on a routine basis. The appearance of biometric identity documents such as passports, visas, nation ...

2008

Low-level grounding in a multimodal mobile service robot conversational system using graphical models

Jonas Richiardi, Andrzej Drygajlo, Plamen Prodanov, Anil Alexander

The main task of a service robot with a voice-enabled communication interface is to engage a user in dialogue providing an access to the services it is designed for. In managing such interaction, inferring the user goal (intention) from the request for a s ...

Springer-Verlag2008

Promoting diversity in Gaussian mixture ensembles: an application to signature verification

Jonas Richiardi, Andrzej Drygajlo

Classifiers based on Gaussian mixture models are good performers in many pattern recognition tasks. Unlike decision trees, they can be described as stable classifier: a small change in the sampling of the training set will produce not a large change in the ...

Springer2008