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Ronan Boulic

Cette personne a quitté l’EPFL

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Publications associées (89)

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A two-arm coordination model for phantom limb pain rehabilitation

Ronan Boulic, Eray Molla

Following limb loss, patients usually continue having sensations on their missing limbs as if they were still present. Signicant amount of such sensations are painful and referred as Phantom Limb Pain (PLP). Previous research has shown that providing the p ...

ACM Press2013

The Critical Role of Self-Contact for Embodiment in Virtual Reality

Ronan Boulic, Bruno Herbelin, Eray Molla, Henrique Galvan Debarba, Sidney Bovet

With the broad range of motion capture devices available on the market, it is now commonplace to directly control the limb movement of an avatar during immersion in a virtual environment. Here, we study how the subjective experience of embodying a full-bod ...

2018

An embodied body morphology task for investigating self-avatar proportions perception in Virtual Reality

Ronan Boulic, Bruno Herbelin, Loën Boban

The perception of one's own body is subject to systematic distortions and can be influenced by exposure to visual stimuli showing distorted bodies. In Virtual Reality (VR), echoing such body judgment inaccuracies, avatars with strong appearance dissimilari ...

2025

On-line adapted transition between locomotion and jump

Daniel Thalmann, Ronan Boulic, Pascal Glardon

Motion blending is widely accepted as a standard technique in computer animation, allowing the generation of new motions by interpolation and/or transition between motion capture sequences. To ensure smooth and seamless results, an important property has t ...

2005

Singularity Free Parametrization of Human Limbs

Ronan Boulic, Eray Molla

In this paper we propose the Middle-Axis-Rotation (MAR) parametrization of human limbs that addresses the ill-conditioned cases of analytical Inverse Kinematics (IK) algorithms. The MAR parametrization is singularity-free in the reach space of the human li ...

ACM Press2013

Sensitivity of hip tissues contact evaluation to the methods used for estimating the hip joint center of rotation

Daniel Thalmann, Ronan Boulic

Computer-based simulations of human hip joints generally include investigating contacts happening among soft or hard tissues during hip movement. In many cases, hip movement is approximated as rotation about an estimated hip center. In this paper, we inves ...

Springer-Verlag2012

Egocentric Mapping of Body Surface Constraints

Ronan Boulic, Eray Molla, Henrique Galvan Debarba

The relative location of human body parts often materializes the semantics of on-going actions, intentions and even emotions expressed, or performed, by a human being. However, traditional methods of performance animation fail to correctly and automaticall ...

2018

Assessing the Impact of Mixed Reality Immersion on Presence and Embodiment

Alexandre Abbey, Ronan Boulic, Bruno Herbelin, Thibault Serge Mario Porssut

When placed inside an immersive virtual simulation, subjects will tend to experience the feeling of being 'really there' and to respond realistically to their environment, forgetting that it is not real. This behaviour is observed when subjects experience ...

Assoc Computing Machinery2021

Self-attribution of distorted reaching movements in immersive virtual reality

Olaf Blanke, Ronan Boulic, Bruno Herbelin, Roy Salomon, Henrique Galvan Debarba

This study explores the extent to which individuals embodied in Virtual Reality tend to self-attribute the movements of their avatar. More specifically, we tested subjects performing goal-directed movements and distorted the mapping between user and avatar ...

2018

Eye Thought You Were Sick! Exploring Eye Behaviors for Cybersickness Detection in VR

Ronan Boulic, Nana Tian

Cybersickness induced through Virtual Reality (VR) applications is still one of its main barriers as it can induce unwanted side-effects in players, significantly hindering the overall experience. Despite the wealth of research available on this topic, it ...

ACM2020

Interactive Low-Dimensional Human Motion Synthesis by Combining Motion Models and PIK

Daniel Thalmann, Ronan Boulic

This paper explores the issue of interactive low-dimensional human motion synthesis. We compare the performances of two motion models, i.e. Principal Components Analysis (PCA) or Probabilistic PCA (PPCA), for solving a constrained optimization problem with ...

2007

A subject-specific software solution for the modeling and the visualization of muscles deformations

Daniel Thalmann, Ronan Boulic, Anders Sandholm

Today, to create and to simulate a virtual anatomical version of a subject is useful in the decision process of surgical treatments. The muscular activity is one of the factors which can contribute to abnormal movements such as in spasticity or static cont ...

Springer-Verlag2009

Artist-Oriented 3D Character Posing from 2D Strokes

Ronan Boulic, Benoît Le Callennec, Pawan Kumar Harish, Mentar Mahmudi

In this paper we present an intuitive tool suitable for 2D artists using touch-enabled pen tablets. An artist-oriented tool should be easy-to-use, real-time, versatile, and locally refinable. Our approach uses an interactive system for 3D character posing ...

Elsevier2016

Characterizing Embodied Interaction in First and Third Person Perspective Viewpoints

Ronan Boulic, Bruno Herbelin, Eray Molla, Henrique Galvan Debarba

Third Person Perspective (3PP) viewpoints have the potential to expand how one perceives and acts in a virtual environment. They offer increased awareness of the posture and of the surrounding of the virtual body as compared to First Person Perspective (1P ...

2015

Reaching articular limits can negatively impact embodiment in virtual reality

Olaf Blanke, Ronan Boulic, Bruno Herbelin, Thibault Serge Mario Porssut

Providing Virtual Reality(VR) users with a 3D representation of their body complements the experience of immersion and presence in the virtual world with the experience of being physically located and more personally involved. A full-body avatar representa ...

2022

Embodied interaction using non-planar projections in immersive virtual reality

Sami Perrin, Ronan Boulic, Bruno Herbelin, Henrique Galvan Debarba

In this paper we evaluate the use of non-planar projections as a means to increase the Field of View (FoV) in embodied Virtual Reality (VR). Our main goal is to bring the virtual body into the user’s FoV and to understand how this affects the virtual body/ ...

ACM Press2015

On scaling strategies for the full-body postural control of virtual mannequins

Daniel Thalmann, Ronan Boulic, Damien Maupu

Due to its intrinsic complexity. full-body postural input has been Mostly limited to off-line motion capture and to on-line Puppetry of a virtual character with little interaction with its environment (e.g. floor). The motion capture technology is now matu ...

Elsevier2009

EEG signature of breaks in embodiment in VR

Olaf Blanke, José del Rocio Millán Ruiz, Ronan Boulic, Ricardo Andres Chavarriaga Lozano, Bruno Herbelin, Fumiaki Iwane, Thibault Serge Mario Porssut

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 ...

2023

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

Ronan Boulic, Daniel Raunhardt

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 ...

2011

Accurate On-line Avatar Control with Collision Anticipation

Daniel Thalmann, Ronan Boulic, Daniel Raunhardt, Damien Maupu

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 ...

Acm Order Department, P O Box 64145, Baltimore, Md 21264 Usa2007