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Human motion capture driven by orientation measurements

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Using biomechanical constraints to improve video-based motion capture

Lorna Herda

In motion capture applications whose aim is to recover human body postures from various input, the high dimensionality of the problem makes it desirable to reduce the size of the search-space by eliminating a priori impossible configurations. This can be c ...

EPFL2004

Motion tracking for human-robot interaction

Björn Jensen

This thesis aims at improving the perceptional side of interaction to enable the handling of more complex situations. For the Swiss National Exposition Expo.02 the robot RoboX and an event-driven interaction system have been designed by members of our lab. ...

EPFL2004

Style-based Motion Synthesis

Daniel Thalmann, Pascal Fua, Ronan Boulic, Raquel Urtasun, Pascal Glardon

Representing motions as linear sums of principal components has become a widely accepted animation technique. While powerful, the simplest version of this approach is not particularly well suited to modeling the specific style of an individual whose motion ...

Wiley-Blackwell2004

Hierarchical Implicit Surface Joint Limits for Human Body Tracking

Pascal Fua, Raquel Urtasun, Lorna Herda

To increase the reliability of existing human motion tracking algorithms, we propose a method for imposing limits on the underlying hierarchical joint structures in a way that is true to life. Unlike most existing approaches, we explicitly represent depend ...

2004

PCA-based walking engine using motion capture data

Daniel Thalmann, Ronan Boulic, Pascal Glardon

This paper aims to propose a novel approach to generate new generic human walking patterns using motion-captured data, leading to a real-time engine intended for virtual humans animation. The method applies the PCA (principal component analysis) technique ...

2004

A probabilistic framework for joint head tracking and pose estimation

Jean-Marc Odobez, Silèye Oumar Ba

Head Tracking and pose estimation are usually considered as two sequential and separate problems: pose is estimated on the head patch provided by a tracking module. However, precision in head pose estimation is dependent on tracking accuracy which itself c ...

2004

A Probabilistic Framework for Joint Head Tracking and Pose Estimation

Jean-Marc Odobez, Silèye Oumar Ba

IDIAP2003

Using skeleton-based tracking to increase the reliability of optical motion capture

Daniel Thalmann, Pascal Fua, Ronan Boulic, Lorna Herda, Ralf Plänkers

Optical motion capture provides an impressive ability to replicate gestures. However, even with a highly professional system there are many instances where crucial markers are occluded or when the algorithm confuses the trajectory of one marker with that o ...

Elsevier2001

Inverse kinematics techniques of the interactive posture control of articulated figures

The context of this thesis is the interactive manipulation of complex articulated figures by means of geometric constraints (here called tasks), for the purpose of posture control and design. The goal is to determine a posture satisfying a set of prescribe ...

EPFL2001

Deformable Avatars

Daniel Thalmann

The following topics are dealt with: motion capture and 3D reconstruction; parametric motion and retargeting; muscles and deformation models; facial animation and communication; and high-level behaviors and autonomous agents ...

2001