Publications by Junghyun Ahn | EPFL Graph Search

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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 ...

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 ...

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 ...

Motion LoD (Level of Detail) is a preprocessing technique that generates multiple details of captured motion by eliminating joints. This LoD technique is applied to movie, game or VR environments for the purpose of improving speed of crowd animation. So fa ...

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 ...

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 ...

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 ...

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 ...

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 ...

Junghyun Ahn

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No peanut! Affective Cues for the Virtual Bartender

Conveying Real-Time Ambivalent Feelings through Asymmetric Facial Expressions

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

Automated Motion LoD with Rigid Constraints

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

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

CYBEREMOTIONS – Collective Emotions in Cyberspace

Within-Crowd Immersive Evaluation of Collision Avoidance Behaviors

Long Term Real Trajectory Reuse Through Region Goal Satisfaction