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CVPR
2008
IEEE
14 years 9 months ago
Learning 4D action feature models for arbitrary view action recognition
In this paper we present a novel approach using a 4D (x,y,z,t) action feature model (4D-AFM) for recognizing actions from arbitrary views. The 4D-AFM elegantly encodes shape and m...
Pingkun Yan, Saad M. Khan, Mubarak Shah
VIS
2003
IEEE
247views Visualization» more  VIS 2003»
14 years 9 months ago
Shape Simplification Based on the Medial Axis Transform
We present a new algorithm for simplifying the shape of 3D objects by manipulating their medial axis transform (MAT). From an unorganized set of boundary points, our algorithm com...
Roger C. Tam, Wolfgang Heidrich
PR
2010
160views more  PR 2010»
13 years 6 months ago
Homeomorphic alignment of weighted trees
Motion capture, a currently active research area, needs estimation of the pose of the subject. For this purpose, we match the tree representation of the skeleton of the 3D shape t...
Benjamin Raynal, Michel Couprie, Venceslas Biri
ICPR
2006
IEEE
14 years 9 months ago
A Global Solution to the SFS Problem Using B-spline Surface and Simulated Annealing
This paper restates the shape from shading problem regarding both surface modeling and optimization. We combine the use of a B-spline as 3D model for the scene surface and the use...
Frédéric Courteille, Jean-Denis Duro...
MM
2005
ACM
188views Multimedia» more  MM 2005»
14 years 1 months ago
Detecting group activities using rigidity of formation
Most work in human activity recognition is limited to relatively simple behaviors like sitting down, standing up or other dramatic posture changes. Very little has been achieved i...
Saad M. Khan, Mubarak Shah