Recent Advances in Biometric Systems: A Signal Processing Perspective Call for Papers Biometrics a digital recognition technology that relies on highly distinctive physical and physiological characteristics of an individual is potentially a powerful and reliable method for personal authentication. The increasing importance of biometrics is underscored by the rapidly growing number of educational and research activities devoted to this field; and by a large number of annually organized Conferences and Symposia exclusively devoted to biometrics. Biometrics is a multidisciplinary field with researchers from signal processing, pattern recognition, computer vision, and statistics. Recently, a number of new important directions have been identified for biometric research, including processing and encoding of nonideal data, biometrics at a distance, and data quality assessment. Problems in nonideal biometric data include off-angle, occluded, blurred, and noisy images. Biometrics at a distance is concerned with recognition from video or snapshots of a biometric sample s captured from a noncooperative moving individual. The goal of this special issue is to focus on recent advances in signal processing of biometric data that allow improved recognition performance through novel restoration, processing, and encoding; matching techniques capable of dealing with complexity and distortions in data acquired from a distance; recognition from biometric data acquired from unconstrained environments or complex experimental set ups; and the characterization of quality and its relationship with performance. Topics of interest include, but are not limited to: Biometric-based recognition under unconstrained presentation and/or complex environment using the following: o Face o Iris o Fingerprint o Voice o Hand o Soft biometrics Multimodal biometric recognition using nonideal data Biometric image/signal quality assessment: o Face o Iris o Fingerprint o Voice o Hand o Soft biometrics Biometric security and privacy o Liveness detection o Encryption o Cancelable biometrics The special issue will focus both on the development and comparison of novel signal/image processing approaches and on their expanding range of applications. Authors should follow the EURASIP Journal on Advances in Signal Processing manuscript format described at the journal site http://www.hindawi.com/journals/asp/. Prospective authors should submit an electronic copy of their complete manuscript through the journal Manuscript Tracking System at http://mts.hindawi.com/, according to the following timetable: Manuscript Due October 1, 2008 First Round of Reviews January 1, 2009 Publication Date April 1, 2009 Guest Editors o Natalia A. Schmid, Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, WV 26506, USA; natalia.schmid@mail.wvu.edu o Stephanie Schuckers, Electrical & Computer Engineering, Clarkson University, Potsdam, NY 13699, USA; sschucke@clarkson.edu o Jonathon Phillips, National Institute of Standard and Technology, Gaithersburg, MD 20899, USA; jonathon@nist.gov o Kevin Bowyer, University of Notre Dame, Notre Dame, IN 46556, USA; kwb@cse.nd.edu