My research interests are in image processing and computer vision. I have helped to develop new techniques for static and moving shape extraction (both parametric and non-parametric) which have found application in automatic face and automatic gait recognition and in medical image analysis. We were early workers in face recognition, later came to pioneer gait recognition and later joined the pioneers of ear biometrics, and currently we're working on soft biometrics where we recognise people by human attributes. Amongst previous research contracts, I was Principal Investigator with John Carter on the DARPA supported project Automatic Gait Recognition for Human ID at a Distance, on the General Dynamics Defence Technology Centre's program on data fusion (biometrics, naturally), on the MoD/ARL (US) IBM-led Information Technology Alliance and projects supporteed by the EPSRC, NERC, and the EU.