一种平面微观形态三维信息获取与处理方法

摘要

In order to obtain graphic information of the low detailed surface, a automatic acquisition system of point cloud informational was designed,which is based on line-laser scanning and precision programmable transla-tional.It realized that a low thickness objects,which is within the scope of A3 paper size,is scanned automatically by dividing into several parts.The point cloud of each part was jointed together without gap,generating a full width point cloud model of the objects.Because of facilitating observation and analyzing and preparing for the next step of 3-d printing work,next work is deal with the three-dimensional point cloud data,include of selecting area of in-terest,triangular mesh,calculating surface area,point cloud height histogram statistics,drawing contour map,cet. The system achieved the point cloud collecting of the plane accuracy in the area of ±0.01 mm and the high accu-racy in the area of ±0.002 mm.%为获取平面微观形态信息,提出了一种基于线激光扫描和精密程控平移台的点云信息自动采集方案,实现了对A3纸张尺寸范围内低厚物品的分幅面全自动扫描;并自动对所获取的各幅面点云数据进行无缝拼接,生成被测物体的全幅面点云集,重建出被测物体三维模型.为便于观测分析并实现3D打印,对获取的点云集进行了区域选择、高度直方图统计、等高线绘制以及三角网格化,得到被测物体的三维模型;并对模型表面积进行计算.所设计的系统实现了平面精度±0.01 mm,高程精度±0.002 mm的点云采集.