在线手绘投影线图的端点融合

针对现有3D手绘投影图端点融合方法的不足，提出通过变系数容差带进行端点融合的方法．首先利用容差半径计算变系数容差带，通过将二次曲线求交转化为直线段与二次曲线求交确定节点；然后按线元为棱线还是转向轮廓线，依据聚类点类型和融合规则分别给出其端点融合方法；最后结合完整线图和3D重建技术进行端点规整．通过算例对文中方法予以验证并与现有方法进行比较．实验结果证明该方法能得到满意的3D手绘投影图规整效果．

Endpoint Fusing of Hand-drawing 3D Projection Sketches

An endpoint fusing method is proposed for hand-drawing 3D projection sketches based on the tolerance zone of each endpoint with variable radius(VRTZ).Adjacent endpoints of sketch lines will be fused if their VRTZs intersect with each other and the candidate endpoints all fall into the region of intersection.When two adjacent sketch lines are recognized as conic curves,their endpoints are reset at one of their intersection points.A simplified approach is developed to evaluate the intersection of two conic cu...