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I'm a Senior Lecturer in Computer Science at the University of York, UK (joining the University in 1998). My main research interest is in feature extraction and machine learning techniques applied to 3D images. I'm more generally interested in all areas of Computer Vision, Pattern Recognition and Machine Learning. Recent work has focussed on (i) 3D shape analysis applied to 3D scans of the human face, (ii) vision-based surveillance and (iii) vision-based human-computer interaction. Prior to moving to York, I was a Fellow of Girton College, University of Cambridge (1994-1998) and a member of the University's Speech, Vision and Robotics Research Group, Department of Engineering, now called the Machine Intelligence Lab. Here I developed algorithms for mobile robot guidance using active range sensors. Before that, I worked in the Robotics Research Group, University of Oxford (1990-1994) as a Post-Doctoral RA, developing novel 3D active sensor systems. I was awarded both a BSc in Engineering Science (1st class), specialising in Electronic Engineering, and a PhD in Robotics (1990) by the University of Durham, UK.