CAJ | 학술논문

针对力触觉再现系统对三维模型真实性和准确性的要求,在基于二维医学图像重构肝脏三维模型的过程中,提出了一种基于B样条拟合曲线的模型平滑方法和基于最邻近点搜索插值的模型网格细化方法。前者是以最初获得的轮廓点为控制顶点,拟合出平滑的B样条曲线并重新采样,以此实现对模型的平滑操作。后者是在每一次连线构造三角形面片过程中,取两点之间的几何中心作为插值点,以此实现三维网格模型的细化。实验表明,这两种算法能够有效提高肝脏三维模型的重建效果,增强力触觉再现系统的真实性。
침대력촉각재현계통대삼유모형진실성화준학성적요구,재기우이유의학도상중구간장삼유모형적과정중,제출료일충기우B양조의합곡선적모형평활방법화기우최린근점수색삽치적모형망격세화방법。전자시이최초획득적륜곽점위공제정점,의합출평활적B양조곡선병중신채양,이차실현대모형적평활조작。후자시재매일차련선구조삼각형면편과정중,취량점지간적궤하중심작위삽치점,이차실현삼유망격모형적세화。실험표명,저량충산법능구유효제고간장삼유모형적중건효과,증강력촉각재현계통적진실성。
To fulfill the reality and accuracy requirements of 3D model for haptic rendering,which is reconstructed from medical images,this paper proposes a B-spline curve based smoothing method and a mesh refinement method.The former uses the original contour points as control vertices to generate the B-spline curve for model smoothing.The latter utilizes the nearest point searching and interpolating method to refine the triangle meshes for 3D liver reconstruction.Experiments validate and prove that the presented methods can improve the quality of the 3D liver model reconstruction and enhance the performance of haptic rendering system.