Publications de Stéphane Gobron

Holographic Visualisation and Interaction of Fused CT, PET and MRI Volumetric Medical Imaging Data Using Dedicated Remote GPGPU Ray Casting

Adrien Raphaël Depeursinge, Patric Hagmann, Stéphane Gobron

Medical experts commonly use imaging including Computed Tomography (CT), Positron-Emission Tomography (PET) and Magnetic Resonance Imaging (MRI) for diagnosis or to plan a surgery. These scans give a highly detailed representation of the patient anatomy, b ...

SPRINGER INTERNATIONAL PUBLISHING AG2018

Asymmetric facial expressions: revealing richer emotions for embodied conversational agents

Ronan Boulic, Daniel Thalmann, Junghyun Ahn, Stéphane Gobron

In this paper, we propose a method to achieve effective facial emotional expressivity for embodied conversational agents by considering two types of asymmetry when exploiting the Valence-Arousal-Dominance representation of emotions. Indeed, the asymmetry o ...

Wiley-Blackwell2013

Conveying Real-Time Ambivalent Feelings through Asymmetric Facial Expressions

Ronan Boulic, Daniel Thalmann, Junghyun Ahn, Stéphane Gobron

Achieving effective facial emotional expressivity within a real-time rendering constraint requests to leverage on all possible inspiration sources and especially from the observations of real individuals. One of them is the frequent asymmetry of facial exp ...

Springer Berlin Heidelberg2012

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

Ronan Boulic, Daniel Thalmann, Junghyun Ahn, Stéphane Gobron, Quentin Silvestre

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 ...

Springer Berlin Heidelberg2012

An Event-Based Architecture to Manage Virtual Human Non-Verbal Communication in 3D Chatting Environment

Ronan Boulic, Daniel Thalmann, Junghyun Ahn, Stéphane Gobron, Quentin Silvestre

Non-verbal communication (NVC) makes up about two-thirds of all communication between two people or between one speaker and a group of listeners. However, this fundamental aspect of communicating is mostly omitted in 3D social forums or virtual world orien ...

Springer Berlin Heidelberg2012

An Interdisciplinary VR-Architecture for 3D Chatting with Non-verbal Communication

Daniel Thalmann, Junghyun Ahn, Stéphane Gobron, Quentin Silvestre

The communication between avatar and agent has already been treated from different but specialized perspectives. In contrast, this paper gives a balanced view of every key architectural aspect: from text analysis to computer graphics, the chatting system a ...

Eurographics Association2011

Long Term Real Trajectory Reuse Through Region Goal Satisfaction

Ronan Boulic, Daniel Thalmann, Pascal Fua, Junghyun Ahn, Stéphane Gobron, Quentin Silvestre, Horesh Beny Ben Shitrit, Mirko Raca

This paper is motivated by the objective of improving the realism of real-time simulated crowds by reducing short term collision avoidance through long term anticipation of pedestrian trajectories. For this aim, we choose to reuse outdoor pedestrian trajec ...

Springer Berlin Heidelberg2011

CYBEREMOTIONS – Collective Emotions in Cyberspace

Daniel Thalmann, Junghyun Ahn, Stéphane Gobron

Emotions are an important part of most societal dynamics. As with face to face meetings, Internet exchanges may not only include factual information but may also elicit emotional responses; how participants feel about the subject discussed or other group m ...

2011

No peanut! Affective Cues for the Virtual Bartender

Junghyun Ahn, Stéphane Gobron

The aim of this paper are threefold: it explores methods for the detection of affective states in text, it presents the usage of such affective cues in a conversational system and it evaluates its effectiveness in a virtual reality setting. Valence and aro ...

2011

Sentiment analysis of informal textual communication in cyberspace

Daniel Thalmann, Stéphane Gobron

The ability to correctly identify the existence and polarity of emotion in informal, textual communication is a very important part of a realistic and immersive 3D environment where people communicate with one another through avatars or with an automated s ...

2010

From Sentence to Emotion: a real-time 3D graphics metaphor of emotions extracted from text

Daniel Thalmann, Junghyun Ahn, Stéphane Gobron

This paper presents a novel concept: a graphical representation of human emotion extracted from text sentences. The major contributions of this paper are the following. First, we present a pipeline that extracts, processes, and renders emotion of 3D virtua ...

Springer-Verlag2010

Real-time textured volume reconstruction using virtual and real video cameras

Daniel Thalmann, Clément Marx, Junghyun Ahn, Stéphane Gobron

Reconstructing objects in three dimensions (3D) has always been one of the primary tasks in the domain of computer graphics (CG). Succeeding in this task in real-time, including texture reconstruction, and with very low-cost hardware is the challenge prese ...

2010

Asymmetrical Facial Expressions based on an Advanced Interpretation of Two-dimensional Russells Emotional Model

Daniel Thalmann, Junghyun Ahn, Stéphane Gobron, Quentin Silvestre

This paper proposes a novel method to compute emotional parameters based on Russell's 2D circumplex diagram for simulating and visualizing asymmetric facial expressions. Based on a large set of emotion coordinates allocated by psychologists, we have select ...

2010