传统的三维扫描方法通常对被测曲面进行一次测量,但在被测曲面的形貌和范围未知的情况下,扫描数据不完整、结果不准确且无法进行有效评价.提出的基于动态路径规划的三维扫描方法主要通过对被测曲面进行粗扫掠和二次扫描,针对三维信息缺失区域自动对扫描路径进行合理规划,引入最小包容球理论和可视锥概念,为三维扫描样品的采样点规划、扫描仪视点和扫描方向生成提供理论依据.该基于动态路径规划的三维扫描方法的可行性在对实际被测曲面的扫描实验中进行了验证并对其扫描质量进行了评价.%Usually the surface being measured needs one-time process by traditional 3D scanning method, however,due to unknown morphology and boundaries,the scanning data is incomplete and the result is in-accurate,which is difficult to evaluate the measurement effectively. In this case,a 3D method based on dy-namic path planning is proposed in order to measure the surface through rough scanning and a second time scanning,aiming at the area of 3D data missing,and the reasonable scanning path can be generated automat-ically. The theory of minimum enclosing ball and the concept of visibility cone are also introduced to pro-vide data basis to planning of sample points, vision points and scanning directions. The feasibility of 3D scanning based on dynamic path planning is verified in the actual experiments of surface measurement and the scanning quality is evaluated.
展开▼
