Robert J. Woodham

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We describe a new approach to transfer knowledge across views for action recognition by using examples from a large collection of unlabelled mocap data. We achieve this by directly matching purely motion based features from videos to mocap. Our approach recovers 3D pose sequences without performing any body part tracking. We use these matches to generate(More)
Photometric stereo is one technique for 3D shape determination that has been implemented in a variety of experimental settings and that has produced consistently good results. The idea is to use intensity values recorded from multiple images obtained from the same viewpoint but under different conditions of illumination. The resulting radiometric constraint(More)
We present a method and implementation to acquire deformable models of elastic objects. The method is based on the Green’s functions matrix representation of an elastic solid. In this paper we present a robust estimation technique for this Green’s functions matrix. Robustness is achieved by regularization and a fitting technique which we describe here in(More)
This paper reconsiders the familiar case of photometric stereo under the assumption of Lambertian surface re ectance and three distant point sources of illumination. Here, it is assumed that the directions to and the relative strengths of the three light sources are not known a priori. Rather, estimation of these parameters becomes part of the problem(More)
This paper proposes a GPU based algorithm for extracting moving objects in real time. The whole process of the proposed approach is handled on GPU. GPU is used for acceleration and the proposed approach increases processing speed dramatically. The method uses a* component and b* component of CIELAB color space without extracting shadow areas as moving(More)
This paper addresses the problem of determining local surface orientation from the intensity information contained in a single monocular view. It represents another look at the problem of obtaining shape from shading information. This problem was first formulated by <Horn 1970> as the solution of first-order non-linear partial differential equations. It was(More)