Effective eye contact is a cornerstone of successful public speaking. It strengthens the speaker's credibility and fosters audience engagement. Yet, managing effective eye contact is a skill that demands extensive training and practice, often posing a significant challenge for novice speakers. In this paper, we present SpeakAssis, the first real-time, in-situ wearable system designed to actively assist speakers in maintaining effective eye contact during live presentations. Leveraging a head-mounted eye tracker for gaze and scene view capture, SpeakAssis continuously monitors and analyzes the speaker's gaze distribution across audience and non-audience regions. When ineffective eye-contact patterns are detected, such as insufficient eye contact, or neglect of certain audience segments, SpeakAssis provides timely, context-aware audio prompts via an earphone to guide the speaker's gaze behavior. We evaluate SpeakAssis through a user study involving eight speakers and 24 audience members. Quantitative results show that SpeakAssis increases speakers' eye-contact duration by 62.5% on average and promotes a more balanced distribution of visual attention. Additionally, statistical analysis based on audience surveys reveals that improvements in speaker's eye-contact behavior significantly enhance the audience's perceived engagement and interactivity during presentations.

翻译：有效的眼神接触是成功公开演讲的基石。它能增强演讲者的可信度并促进听众的参与。然而，管理有效的眼神接触是一项需要大量训练和实践的技能，对于新手演讲者而言常常构成重大挑战。本文提出了SpeakAssis，这是首个旨在现场实时主动辅助演讲者在现场演示中保持有效眼神接触的可穿戴系统。该系统利用头戴式眼动仪捕捉视线和场景视图，持续监测并分析演讲者在听众区与非听众区之间的视线分布。当检测到无效的眼神接触模式时，例如眼神接触不足或忽视某些听众区域，SpeakAssis会通过耳机提供及时、情境感知的音频提示，以引导演讲者的视线行为。我们通过一项涉及八名演讲者和二十四名听众的用户研究对SpeakAssis进行了评估。定量结果表明，SpeakAssis平均将演讲者的眼神接触时长提高了62.5%，并促进了更均衡的视觉注意力分布。此外，基于听众调查的统计分析显示，演讲者眼神接触行为的改善显著提升了听众在演讲过程中感知到的参与度和互动性。