GestureLens: Visual Analysis of Gestures in Presentation Videos

TL;DR

GestureLens is a visual analytics system designed to help presentation coaches analyze and explore gesture usage in videos, revealing spatial, temporal, and speech-gesture correlations to improve public speaking skills.

Contribution

We introduce GestureLens, a novel visual analytics tool that enables efficient, multi-faceted exploration of gestures in presentation videos, addressing the challenge of complex temporal and spatial gesture analysis.

Findings

Effective in revealing spatial and temporal gesture patterns.

Facilitates exploration of speech-gesture relationships.

Validated through expert interviews and usage scenarios.

Abstract

Appropriate gestures can enhance message delivery and audience engagement in both daily communication and public presentations. In this paper, we contribute a visual analytic approach that assists professional public speaking coaches in improving their practice of gesture training through analyzing presentation videos. Manually checking and exploring gesture usage in the presentation videos is often tedious and time-consuming. There lacks an efficient method to help users conduct gesture exploration, which is challenging due to the intrinsically temporal evolution of gestures and their complex correlation to speech content. In this paper, we propose GestureLens, a visual analytics system to facilitate gesture-based and content-based exploration of gesture usage in presentation videos. Specifically, the exploration view enables users to obtain a quick overview of the spatial and temporal distributions of gestures. The dynamic hand movements are firstly aggregated through a heatmap in the gesture space for uncovering spatial patterns, and then decomposed into two mutually perpendicular timelines for revealing temporal patterns. The relation view allows users to explicitly explore the correlation between speech content and gestures by enabling linked analysis and intuitive glyph designs. The video view and dynamic view show the context and overall dynamic movement of the selected gestures, respectively. Two usage scenarios and expert interviews with professional presentation coaches demonstrate the effectiveness and usefulness of GestureLens in facilitating gesture exploration and analysis of presentation videos.