My research can be categorised into three main areas: facial modelling and animation, AR and VR technology and applications, and simulation and sketch-based interfaces.
Computer facial modelling and animation
The tension between modelling and animation provokes much of my work, and was the subject of my PhDthesis awarded in 1999 (supervised by Dr Alan Watt). For example, three-dimensional facial animation is an area where modelling and animation are intimately linked and where our familiarity imposes strict judgement criteria. I am interested in all aspects of face processing. In recent years, I have graduated PhD students in face sketching, using MRI data for facial reconstruction, investigating the use of visemes in facial animation, and using visual speech in technology-enhanced learning. I am currently supervising two PhD students, one on physically-based animation of the mouth and one on recreating 3D mouth animation from 2D video.
AR and VR technology and applications
My work in this area has focussed mainly on digital heritage applications. In a recent AHRC/EPSRC-funded project with the Department of Archaeology and the School of Architecture, we investigated the use of augmented reality to display a long gone medieval Castle where it once stood in the centre of Sheffield. I am co-supervising an Archaeology PhD student investigating the use of 3D scans for analysis of clay pipe figurines. A recent project with the Department of Archaeology and the AMRC was to digitally reconstruct a unique UK archaeological site (Rothwell Charnel Chapel).
Simulation and sketch-based interfaces
This work is a collaboration with my colleague Dr Paul Richmond, who leads the work on simulation in the research group. We jointly supervise PhD students on a range of simulation projects using agent-based modelling and GPUs for transport and pedestrain simulations. We are also investigating efficient rendering for large scale simulations and real-time control of large-scale pedestrian simulations using a sketch-based interface.
Other previous work
- A collaboration with visiting researcher Dr Xiaoning Liu, Northwest University, China, Sep 2016 - Sep 2017. We worked on the processing of 3D point cloud data for archaeological objects, and also investigated techniques for craniofacial reconstruction.
- A collaboration with visiting researcher Dr Wuyang Shui, Beijing Normal University, China, Jan 2016 – Jan 2017. We worked on the Rothwell Charnel Chapel project with the Dept of Archaeology, and also a project on craniofacial analysis.
- 'Computer Love 2.0' (virtual gallery), University of Sheffield Festival of the Mind, £4,885, Maddock and Brown (Computer Science), Bax and Fleetwood (Humanstudio), 18-28 Sep 2014.
- Physically-based facial modelling and animation (workstation), EPSRC Upgrading Small Scale Equipment Base for Early Career Researchers, £2,570, Viceconti (PI) et al inc. Maddock, 1 Nov 2012 - 31 March 2013.
- RECITE (Rethinking a City's Theatres, Digital Creativity and Innovation), University of Sheffield Cross-cutting Director of Research and Innovation Scholarships in the Digital World, ~£162,000, Peng (PI) and Samuel (Architecture), Maddock and Romano (Computer Science), Nicholson and Babbage (English), Sep 2010-Sep 2013.
- 'Computer Love' (virtual gallery), University of Sheffield Festival of the Mind, £3,522, Brown and Maddock (Computer Science), Bax (Humanstudio), 20-30 Sep 2012. This was a collaboration between Dr Guy Brown and myself in Computer Science and Nick Bax (Human Studio, Sheffield) as part of the Festival of the Mind 2012. We created a virtual art gallery that showcased work from local artists and work based on Computer Science research. The project was featured on the Guardian's culture pages.
- "Visual Speech for Technology Enhanced Learning", ESRC/EPSRC PhD studentship, £49,000, Maddock (PI, Computer Science), Nicolson (Psychology), Pascalis (Grenoble), Oct 2008-Sep 2011. PhD student: Priya Dey.
- Mentor for Dr Paul Richmond, University of Sheffield Research Fellow (Oct,2009 - Sep,2010), working on 'Agent Based Modelling on Graphics Card Hardware'.
- Co-investigator: "3D visual and audio animation of an urban environment", Kang and Smyrnova (Architecture), Maddock and Richmond (Computer Science), University of Sheffield Bridging the Gaps, Pump-priming project, 2009, £2700
- Co-investigator: "Engineered Trusses as Scaffolds for Tissue Engineering", Askes (Civil and Structural Engineering) Todd (Engineering Materials), Maddock (Computer Science), Allwood (Engineering Materials), Figueroa-Vargas (PDRA), University of Sheffield Bridging the Gaps Flagship Project, 2009
- Collaboration with Dr Yingmei Wei, National University of Defense Technology, China, Visiting Researcher at Sheffield (2008/09): We investigated the use of machine learning techniques in human figure animation
- Collaboration with Prof. Neil Spooner (PI, Physics and Astronomy), Prof Nigel Allinson (EEE), Dr Tony Dodd (ACSE): We collaborated on a University Business Research Fellow Post (75K awarded, 2006) on Security and Crime Detection Technology. My interest was in methods to produce 3D images of crime suspects.
- Collaboration with Dr Chang Hong Liu (Hull): In 2005, we conducted a pilot study on the animation of a database of 3D heads for potential use by police forces for virtual line-ups.
- Studies of facial expression analysis in autism, Children's appeal - Sheffield Children's Hospital Charity, O.Pascalis (PI), M.Blades, M.Smith, (Psychology, Sheffield) Maddock (Computer Science), 2005-2006
- Functional modelling of fine tissue deformation behaviour from 3D video capture, EPSRC VVG network, Maddock (PI), Hilton(Surrey), 2005.
- Collaboration between Lawrence, Sanchez and Maddock (Sheffield), Electronic Arts Canada: Electronic Arts supplied a range of motion capture data which we used to investigate the link between our facial animation work and Neil's machine learning work, 2004. The facial motion capture data was also used in Sanchez's 2006 PhD thesis.
- SUCLA: Sheffield University Cleft Lip Analyser - Software was produced which enabled a quantitative analysis of the degree of asymmetry in patients who have had surgical repair of a unilateral cleft lip deformity. This software was based on an original program developed by Mr Brian Coghlan, Consultant Plastic Surgeon, Chelsea and Westminster Hospital, London. (Grant title: The development of a technique for the analysis of symmetry of the cleft-lip nose, Maddock and Meredith (with M.Ghosh (PI), BAPS Research Fellow in Plastic Surgery), British Association of Plastic Surgeons, 1999)