基于离散点云的拉伸面与旋转面参数提取技术研究

Research on the Parameters Extraction Technology of Extruded Surface and Rotational Surface Based on Scattered Points Cloud

为了提高拉伸面和旋转面参数提取的精度和抗噪声能力,依据拉伸和旋转面在各点的法矢与拉伸方向及旋转轴的几何约束关系,利用随机抽样一致性算法结合最小二乘法提取拉伸方向和旋转轴,然后采取全局约束策略,通过对轮廓数据整体拟合来提取轮廓线.实验证明了算法的有效性、鲁棒性和精确性,为逆向工程中高质量的重建曲面奠定了良好的基础.

In order to extract the parameters of extruded surface and rotational surface accurately and robustly,a method is presented,which can extract the extruded direction of extruded surface and the rotational axis of rotational surface with RANSAC algorithm combined by Least-Squares,according to the geometrical relationship between the normal of extruded surface or rotational surface and the extruded direction or rotational axis at each point.And then,a constrained fitting method is used to get the profile curve...