视图特征的曲面重建方法研究  

Reconstruction of 3D Object Based on the Features of Orthographic Views

作　　者：潘华伟[1] 李莉[2] 易平[2] 高春鸣[1] 

机构地区：[1]湖南大学计算机与通信学院,湖南长沙410082 [2]湖南大学机械与运载工程学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2010年第3期34-37,共4页Journal of Hunan University:Natural Sciences

基　　金：科技部支撑计划区域项目(2007BAH14B01);国家高技术研究发展计划(863计划)资助项目(2007AA010404);长沙市科技计划资助项目(K09050101-11)

摘　　要：提出了一种基于视图特征的三维形体重建方法,根据分离视图的投影特征定义曲面特征,通过匹配二维视图特征识别曲面类型及参数,从而构造曲面线框图生成B-rep结构形体模型.利用曲面求交法求解三维二次曲面交线及高次曲线,解决了五点法及共轭直径法在求解二次曲线时采样复杂且耗时的问题以及无法通过视图投影获取高次曲线的问题.实验结果和算法分析表明,通过特征获得曲面类型再求交获得高次曲线的这一过程,是恢复二次或高次曲线的行之有效的方法,而且计算效率也有较大提高.A new algorithm based on the features of orthographic view was proposed to reconstruct a 3D object. The features of surfaces were defined, based on the projection-characteristics in the separated orthographic views, and the features extracted in 2D views were matched to identify the type and parameter of the surfaces. The curvilinear wire-frame of surface was constructed and the B-rep-structured 3D model was built. Then by utilizing the intersection of constructive surfaces, the conics between the surfaces were obtained. The sampling-complicated and time-consuming problems were solved in the methods of five-point and conjugate-diameter. The higher order curve was acquired in the same way. The results of experiment and the analysis of the algorithm have indicated that getting the types of surface through the characteristics and then retrieving the conic or high-curve through the intersection are an effective way, and at the same time, the computing efficiency is enhanced.

关 键 词：工程视图 视图特征 曲线线框图 三维重建 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]