基于线结构光的视频内窥镜测量技术

Measurement method for video probe based on line-structured light

针对视频内窥镜的测量需求,提出了一种基于线结构激光照射的测量技术。采用线激光作为定标光照射物体表面,建立了线结构光成像模型,标定了不同物距时的放大率和图像中线位置间的比例系数。通过构建测量平台计算了物体的几何参数,实验结果表明测量误差在10%以内,能够满足视频内窥镜观测和测量要求。

Abstraet ：Considering the requirement of measurement for video probe, a method ior measuring points, lines and surfaces of object by using line-structured laser was presented. The linestructured light imaging model was built, where the linear laser was used as an auxiliary light source irradiating on the surface of the object. Compared to＇the object image, the proportional coefficient was calibrated with multiplying factor in different distances and laser line positions. The geometry parameters were calculated based on the measurement platform. The experimental results show that the measuring error is less than 10 %, which indicates the method can satify the requirements of the video probe. Key words： video probe; line-structured light ; geometry parameter