Publications de Ronan Boulic | EPFL Graph Search

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The brain mechanism of embodiment in a virtual body has grown a scientific interest recently, with a particular focus on providing optimal virtual reality (VR) experiences. Disruptions from an embodied state to a less- or non-embodied state, denominated Br ...

Despite the large success of games grounded on movement-based interactions the current state of full-body motion capture technologies still prevents the exploitation of precise interactions with complex environments. The first key requirement in the line o ...

We describe the HUMANOID environment dedicated to human modeling and animation for general multimedia, VR, and CAD applications integrating virtual humans. We present the design of the system and the integration of the various features: generic modeling of a large class of entities with the BODY data structure, realistic skin deformation for body and hands, facial animation, collision detection, integrated motion control and parallelization of computation intensive tasks

Interactive control of a virtual character through full body movement has a wide range of applications. However, there is a need for systems that accurately reproduce the motion of a performer while accounting for surrounding obstacles. We propose an appro ...

Cybersickness continues to be one of the main barriers for mainstream adoption of Virtual Reality (VR). Despite the wealth of research available on this topic, it is still an unsolved problem. This paper explores the potential influence of cybersickness ov ...

Cybersickness still poses a significant challenge to the widespread usage of virtual reality, leading to different levels of dis- comfort and potentially breaking the immersive experience. Researchers have attempted to discover the possible fundamental cau ...

The authors evaluate a multi-level action recognition algorithm for behavioral interactions in inhabited virtual worlds

We interact with the world through a body that includes hands and fingers. Likewise, providing an avatar allowing the control of a virtual body with fingers is an important step to improve the user experience in VR. When the user and their avatar skeleton ...

In this paper, we present our spreadsheet framework, which uses a spreadsheet-likeinterface for exploring biomedical datasets. The principles and advantages of this classof visualization systems are illustrated, and a case study for the analysis of hip joi ...

Identifying a precise anatomic skeleton is important in order to ensure high-quality motion capture. In this paper, we discuss two skeleton-fitting techniques based on 3D optical marker data. First, a local technique is proposed, based on relative marker trajectories. Then it is compared to a global optimization of a skeleton model. Various proposals are made to handle the skin deformation problem

We compare two formulations for the kinematic control of redundant manipulators, based on task prioritization. We also propose an incremental method to speed up the evaluation of the solution. This is especially interesting when dealing with multiple task-priority levels and with highly redundant structures. Finally, the effectiveness of the approach in the context of posture control of human-like articulated figures is illustrated

This paper explores the potential of prioritized Inverse Kinematics for full body motion capture. We are especially interested in compensating for the use of a minimal set of sensors by proposing pertinent constraints associated with a priority level. We evaluate the believability issues and the performance requirements arising through a case study exploiting recorded motions of professional clarinet performers. We conclude by presenting a framework in which end users can easily configure the IK engine for

Motion capture has been adopted for the production of highly realistic movements, as well as for the clinical analysis of pathological motion. In both cases, a skeleton model has to be identified to derive the joint motion. The optical technology has gained popularity due to the high precision of its marker position measurements. However, when it comes to building the skeleton frames out of the 3D marker positions, significant local skin deformations may penalize the quality of the model reconstruction. We

Photorealistic animation is a desirable technique for computer games and movie production. We propose a new method to synthesize plausible videos of human actors with new motions using a single cheap RGB-D camera. A small database is captured in a usual of ...

In this paper we explore the potential of prioritized inverse kinematics for motion capture and postural control. We have two goals in mind: reducing the number of sensors to improve the usability of such systems, and allowing interactions with the environ ...

The growth of motion capture systems have contributed to the proliferation of human motion database, mainly because human motion is important in many applications, ranging from games entertainment and films to sports and medicine. However, the captured mot ...

The full-body control of virtual characters is a promising technique for application fields such as Virtual Prototyping. However it is important to assess to what extent the user full-body behavior is modified when immersed in a virtual environment. In the ...

This paper proposes a new emotional model for Virtual Humans (VHs) in a conversational environment. As a part of a multi-users emotional 3D-chatting system, this paper focus on how to formulate and visualize the flow of emotional state defined by the Valen ...

In the computerized generation of human poses, it is important to take into account not only the active component of the torque, but also the ligaments and connective tissues which produce a passive torque at the limits of the joint range of motion. We pre ...

This paper extends the funnelling behavior to offer a low-cost flexible guidance of mobile entities towards a circular region goal with the guarantee of enforcing an orientation within a predefined tolerance interval. The key requirements are the same as t ...

Ronan Boulic

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EEG signature of breaks in embodiment in VR

Immersive singularity-free full-body interactions with reduced marker set

The HUMANOID environment for interactive animation of multiple deformable human characters

Accurate On-line Avatar Control with Collision Anticipation

Exploring Blink-Rate Behaviors for Cybersickness Detection in VR

A review of cybersickness in head‐mounted displays: raising attention to individual susceptibility

Real-time interactions with virtual agents driven by human action identification

Real-time Self-contact Retargeting of Avatars down to Finger Level

Spreadsheet Framework for Visual Exploration of Biomedical Datasets

Local and global skeleton fitting techniques for optical motion capture

Task-priority formulations for the kinematic control of highly redundant articulated structures

Towards Configurable Motion Capture with Prioritized Inverse Kinematics

Visualization of Local Movements for Optimal Marker Positioning

SPA: Sparse Photorealistic Animation Using a Single RGB-D Camera

Challenges in exploiting prioritized inverse kinematics for motion capture and postural control

Motion Pattern Encapsulation for Data-Driven Constraint-Based Motion Editing

Characterizing full-body reach duration across task and viewpoint modalities

An NVC Emotional Model for Conversational Virtual Humans in a 3D Chatting Environment

Evaluating the influence of induced passive torques in the simulation of time-varying human poses

Relaxed Steering towards Oriented Region Goals