【摘要】 提出了一种基于变截面轮廓线族重建NURBS曲面的方法。用自动跟踪法反求出轮廓线组的脊线,并用脊线自动调整各轮廓线的起始点位置。然后插值各个轮廓线,构造封闭的样条曲线,以特征点处的节点为分段点实现多条样条曲线的分段相容,并蒙皮构造封闭的B样条曲面。对于有特征点的轮廓线,通过设置特征点的重数及在曲线构造和曲面蒙皮中的相应处理,可以在曲面上保留轮廓线中的特征。更多还原

【Abstract】 A method of surface reconstruction from serial spatial cross-sections was proposed. First, a spine of serial contours was sought through an automatic tracing method, and the start points of contours were adjusted according to the spine. Second, a closed B-spline curve was constructed by interpolating contour points, and the compatibility of NURBS curves was realized by subsection compatibility. Third, surface was reconstructed by skinning. For contour with feature point, by setting the multiplicity of feature point and corresponding operation in construction of curve and surface, the feature of contour is preserved in resulting surface.更多还原