Campus Event Calendar: Alexis Heloir (02/14/2008 in D3 1

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Event Entry

What and Who

"The taking into account of role-shift in sign language generation : insights from Embodied Conversational Agents"

Alexis Heloir

VALORIA (Université de

Talk

AG 1, AG 2, AG 3, AG 4, AG 5, SWS, RG1, RG2

AG Audience

English

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Date, Time and Location

Thursday, 14 February 2008

14:15

60 Minutes

D3 1 - DFKI

-2.17, ground level

Saarbrücken

Abstract

We present in this talk our investigation dedicated toward the design and animation of realistic signing agents. The highlight is focused on the taking into account of sign languages' specificity : iconic intend. We highlight the fact that our problematics stays at the crossroad between three domains : linguistics of signed languages, expressive virtual agents and computer animation. By focusing on the particular aspects of sign language, we highlight the importance of iconicity in the generation of meaningful utterances in signed language. Iconicity is a linguistic theory which describe the processes aiming at picturing the perceptual world thanks to the iconic ressemblance of the forms to what they represent. This process, known as "iconic intend" is described according to "highly iconic structures" : "transfers of form & size", "transfers of situation" and "transfers of person". Among those structures, we focus on "transfers of person" (role shifts) and show how the qualitative aspects of gesture may convey meaningful information about the embodied character depicted in the discourse (internal state, cultural traits, etc.). We then show how existing work dedicated to embodied conversational agents may define a set of "traits" giving insights on how an embodied agent should gesture during role shift. We then present a qualitative and quantitative analysis performed over captured captured gesture sequences of french sign language gestures. Each sequence differs only in the expressive quality of the gestures. We show that style has an influence on surfacing gestures both over temporal, spatial, structural aspects but as well on the repartition of gesture phases along the discourse. We finally present the software tools we developed in order to validate our hypothesis. We first introduce SMR, a generic library written in C++ and dedicated to the analysis and synthesis of skeletal animation. We then briefly present the protypes GUI we designed in order to validate our motion generation algorithms.

Contact

Michael Kipp

+49 681 302-5256

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Alexandra Klasen, 02/12/2008 16:19 -- Created document.

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