一种新的多媒体教学系统人机交互应用研究

Research on the Human-Computer Interaction in a New Multimedia Teaching System

目前,多媒体教学在高校日常教学中占有重要地位,但多媒体教学系统由于各种原因容易损坏,严重影响教学的质量。本系统对现有多媒体教学系统增加一个摄像头,通过捕获授课教师的手势指令控制多媒体展示,避免了多媒体教学系统的人为损坏。提出基于二次检测的人手跟踪算法和基于人手运动轨迹的手势指令识别算法。经实验证明该系统快速稳定、抗干扰性强且与用户无关,可广泛应用于多媒体教学中。

At present,multimedia teaching occupies an important position in college daily teaching. But multimedia teaching system is easy to be damaged by all sorts of reasons which seriously impact the quality of instruction. We add a camera in the existing system to catch gesture command of teachers to control the multimedia show which can avoid artificial damage of multimedia teaching system. This paper puts forward hand tracking algorithm on the base of twice detection and gestures instructions identification algorithm on the base of hand motion trail. This system is fast and stable, robust anti-jamming and irrelevant to the user. It can be widely used in multimedia teaching.