Vision-based framing or video anchoring allows trackers, such as digitizing arms, to re-base when necessary, in non-contact way, utilizing software recognition of dedicated alignment marks. “基于视觉的架构或视频锚针”允许数字手臂等跟踪器在需要的时候进行重新定位,且全程无接触,完全通过软件对特定对齐标号的识别而控制。
A kind of video image digitizing circuit based on computer parallel port 一种基于计算机并行口的视频图像采集电路