- 學位論文
醫學圖解和手術模擬之容積操作時正確同質面法線計算方法
Accurate Surface Normal Computation For Isosurface Reconstruction During Volume Manipulation For Surgical Simulation And Medical Illustration Applications
摘要
Marching Cubes algorithm 是一個被廣泛使用於重建容積同質面的演算法。然而，Marching Cubes algorithm無法同時重建多種類同質面和局部改變同質面。 在本論文中，我們提出使用一種Cube structure 來紀錄Marching Cubes的分類以及每個Cube的三角片，接著建立對每個Cube的三角片及其頂點作獨立新增與刪除，因為只有更改被局部改變的Cubes，所以即時同質面的重建可以達到。同時，三角片上的點顯示出不同的顏色於不同種類的物體，因此多種物體的同質面也可以同時被重建。在我們手術模擬的顯示中，多種類的局部同質面改變可以達成即時重建。
並列摘要
Marching cubes algorithm is widely used in volume isosurface reconstruction. However, Marching cubes algorithm can not reconstruct multiple types of tissues and change local isosurface at the same time. In this paper, we propose a cube structure to record classification of marching cubes and triangles of cube, then we can build to add or delete vertex and triangle in cube independent. Because only local cubes be changed, therefore isosurface can be reconstructed immediately. In the mean- while, vertexes of triangle can show the different colors in different types，so multiple types of tissues can reconstruct isosurface.