William A. P. Smith

Publications (4)1.98 Total impact

• Article: Inverse Rendering of Faces with a 3D Morphable Model.

  Oswald Aldrian, William A P Smith
  [show abstract] [hide abstract]
  ABSTRACT: In this paper, we present a complete framework to inverse render faces with a 3D Morphable Model (3DMM). By decomposing the image formation process into geometric and photometric parts, we are able to state the problem as a multilinear system which can be solved accurately and efficiently. As we treat each contribution as independent, the objective function is convex in the parameters and a global solution is guaranteed. We start by recovering 3D shape using a novel algorithm which incorporates generalization error of the model obtained from empirical measurements. We then describe two methods to recover facial texture, diffuse lighting, specular reflectance, and camera properties from a single image. The methods make increasingly weak assumptions and can be solved in a linear fashion. We evaluate our findings on a publicly available database, where we are able to outperform an existing state-of-the-art algorithm. We demonstrate the usability of the recovered parameters in a recognition experiment conducted on the CMU-PIE database.
  IEEE Transactions on Software Engineering 05/2013; 35(5):1080-93. · 1.98 Impact Factor
• Conference Proceeding: Inverse rendering in SUV space with a linear texture model.

  Oswald Aldrian, William A. P. Smith
  IEEE International Conference on Computer Vision Workshops, ICCV 2011 Workshops, Barcelona, Spain, November 6-13, 2011; 01/2011
• Source

  Available from: bmva.org

  Conference Proceeding: A Linear Approach to Face Shape and Texture Recovery using a 3D Morphable Model.

  Oswald Aldrian, William A. P. Smith
  British Machine Vision Conference, BMVC 2010, Aberystwyth, UK, August 31 - September 3, 2010. Proceedings; 01/2010
• Conference Proceeding: Learning the nature of generalisation errors in a 3D morphable model.

  Oswald Aldrian, William A. P. Smith
  Proceedings of the International Conference on Image Processing, ICIP 2010, September 26-29, Hong Kong, China; 01/2010