在深入视频采集设备的细节之前，先说一点技术背景资料。
Before I get into the details of video-capture devices, a little background on the technology is in order.
视觉系统作为机器人的眼睛，担负着现场视频采集的任务，本文对视频采集设备包括照明光源、摄像机以及视频采集卡进行了选型和设计。
As the robot's eyes, vision system shoulders the task of live video capture. Video capture devices including the light source, camera and video capture card are selected in this paper.
具体来说，你可以编写一个应用程序，从设备采集音频和视频。
Specifically you can write an app that captures audio and video from the device.
应用推荐