十字激光线扫描立体匹配算法

Research on surface reconstruction from intersecting curves

为研究相交曲线的立体匹配方法,提出了一种基于十字激光的手持式扫描系统的立体匹配算法。该系统首先通过激光发射器投射的十字激光线对被测物体进行扫描,然后通过计算机处理投射激光线图像,从而获得问题的三维信息。为实现在世界坐标系下对扫描的刚体转换进行估计。利用八点算法求出两个相机之间的基本矩阵,再求出十字激光线上的对应匹配点,最后利用三角原理和曲面微分几何的相关知识对十字激光线进行三维提取。经实验验证,该算法有效地解决了匹配点求取错乱的问题,提高十字激光条纹的匹配效率。

This paper proposes a stereo matching method for handy-scanner based on cross light.The system works by scanning the object to be measured using cross laser and then obtaining 3D information by dealing with cross laser image to estimate the real dimension of the measured objects under the world coordinate.This goal is achieved firstly by using 8-points algorithm to compute fundamental matrix,then by matching the points on the left and the right cameras based on fundamental matrix,and finally by obtaining the 3D coordinates of the point on the cross laser by triangulation and curve surface differential.The experiment proves that this algorithm is an effective solution to matching points in disorder and an improvement in efficiency of matching cross laser stripes.