Publications by Junghyun Ahn | EPFL Graph Search

Evaluating the Sensitivity to Virtual Characters Facial Asymmetry in Emotion Synthesis

The use of expressive Virtual Characters is an effective complementary means of communication for social networks offering multi-user 3D-chatting environment. In such context the facial expression channel offers a rich medium to translate the on-going emot ...

Taylor & Francis2017

Asymmetric facial expressions: revealing richer emotions for embodied conversational agents

Daniel Thalmann, Ronan Boulic, Stéphane Gobron, Junghyun Ahn

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

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

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

Within-Crowd Immersive Evaluation of Collision Avoidance Behaviors

Daniel Thalmann, Ronan Boulic, Junghyun Ahn, Nan Wang

In this paper, we first present our crowd simulation method, Trajectory Variant Shift (TVS) based on real pedestrian trajectories re-use. We detail how to re-use and shift these trajectories to avoid collisions while retaining the liveliness of captured da ...

ACM2012

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

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

Conveying Real-Time Ambivalent Feelings through Asymmetric Facial Expressions

Daniel Thalmann, Ronan Boulic, 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

Long Term Real Trajectory Reuse Through Region Goal Satisfaction

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

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

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

CYBEREMOTIONS – Collective Emotions in Cyberspace

Daniel Thalmann, Stéphane Gobron, Junghyun Ahn

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

Stéphane Gobron, Junghyun Ahn

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