三维显示以其直观自然的表现方式获得了广泛关注，三维交互技术也随之迅猛发展。提出了一种基于红外结构光、单摄像头的实时交互系统。红外结构光投影对空间进行编码，摄像头实时采集用户手部红外图像，经由OpenCV实现的图像处理算法比较两帧图像，获得结构光在手部移动的信息，从而实现对包括深度方向在内的三个维度的平移、缩放和旋转动作等用户交互动作的解析，并导入三维显示设备，对三维显示的虚拟物体进行实时控制。利用商用CMOS摄像头和红外LED搭建了交互样机。实验结果证明，该方案能以较低成本实现实时徒手三维交互。

Three-dimensional (3D) display has attracted widespread attention all over the world for its intuitive and natural performance. At the same time, three-dimensional interactive technology is also developed fast. A real-time interactive system based on infrared structured light and single-camera is carried out. Infrared structured light is projected onto interactive gesture as encoded procedure, and then infrared images of user′s hand are captured by the camera in real time. An image processing algorithm implemented by OpenCV compares the difference between two consecutive images to obtain the movement information of structured light on user′s hand. Therefore, user′s interactive gestures including movement in three dimensions, zooming and rotating, can be recognized and then transported to three-dimensional display devices in real time. A prototype-equipment is proposed using off-the-shelf CMOS camera and infrared LED. Experimental results show that three-dimensional freehanded interaction can be realized by this approach in low cost.