基于双目立体视觉的医用三维电子内窥镜系统

3D Medical Electronic Endoscope System Based on Binocular Stereo Vision

为了施行较为复杂的微创外科手术,设计了医用三维电子内窥镜系统,对系统的工作原理、显示方式等进行了分析。该系统基于双目立体视觉原理,采用双CCD摄像机模拟人眼实现了机器立体视觉;利用Zemax软件辅助设计了双光路内窥镜光学系统;通过比较几种立体显示方式的优缺点,选择了无源偏振眼镜立体显示方法,该方法采用基于FPGA的时分制立体显示技术,左右图像以100Hz帧频交替显示,并与液晶调制屏同步,观察者佩戴偏振眼镜即可观察到清晰无闪烁立体图像。经临床试验表明:简化了的光学系统的电子内窥镜图像质量得到显著提高;图像帧频达到100Hz,无闪烁感,且无停顿、拖尾、扭曲和停滞等现象。该系统可广泛应用于微创外科手术中,并可作为腹腔手术机器人的显示系统使用。

Based on the application of streaming media in the modern education networks such as voice and video,we discuss the important meaning of the streaming media applied in the classroom.The three key technologies concerning the teaching platform construction based on the streaming media are expounded,which are broadband wireless multimedia accessing technology,the demands for network QoS and the needs of bilateral interactive teaching to the distributed multimedia network system.