CAJ | 학술논문

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.
제출료일충기우시도특정적삼유형체중건방법,근거분리시도적투영특정정의곡면특정,통과필배이유시도특정식별곡면류형급삼수,종이구조곡면선광도생성B - rep결구형체모형.이용곡면구교법구해삼유이차곡면교선급고차곡선,해결료오점법급공액직경법재구해이차곡선시채양복잡차모시적문제이급무법통과시도투영획취고차곡선적문제.실험결과화산법분석표명, 통과특정획득곡면류형재구교획득고차곡선적저일과정, 시회복이차혹고차곡선적행지유효적방법,이차계산효솔야유교대제고.
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.