中文摘要：

随着多媒体技术的迅速发展，许多高校采用多媒体计算机系统辅助教学。为了增强课堂的趣味性以及教学的新颖性，将体感交互系统巧妙地应用于多媒体教学。利用微软公司设计的Kinect传感器的骨骼跟踪功能，建立骨骼跟踪模型，通过手势识别实现对PPT的播放控制。建立手势识别库并利用计算简单、方便有效的两点法进行关节点之间的角度计算来实现手势识别，将手势反馈到系统并完成相应的控制指令输出，实现PPT的播放、翻页等基本操作。实验表明，手势控制PPT操作成功率高，能够有效地控制PPT播放。

英文摘要：

With the rapid development of the multimedia technology, multimedia computers have been used in teaching systems in many colleges to provide some supplementary teaching. In order to enhance the interest and the novelty of class teaching, the somatosensory interactive has been applied to multimedia teaching system cleverly. The PowerPoint playback control was completed by using gesture recognition with the skeletal tracking of Kinect sensor. Firstly, the gesture recognition library should be established. Then the angle calculation was carried out by using two points method, thereby the gesture recognition is realized. Lastly, the gesture was fed back into the system to achieve the output of the corresponding control command and to complete the realization of the basic operation of PowerPoint such as PowerPoint playback and flip.Experiments show that the PowerPoint playback controlled by gestures operated successfully and effectively.