虚拟内窥镜自动漫游加速方法研究  

Research of Acceleration Method in Virtual Endoscopy Automatic Navigation

作　　者：杨金柱[1] 胡英[2] 徐心和[1] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110004 [2]大连海事大学自动化研究中心,辽宁大连116026

出　　处：《系统仿真学报》2007年第4期790-793,共4页Journal of System Simulation

基　　金：国家自然科学基金资助项目(60475036)

摘　　要：针对虚拟内窥镜自动漫游技术,利用基于双距离场的三维中心路径提取算法进行路径提取,采用管状器官的圆柱状近似,将中心路径用多个近似的圆柱体代替,用距离变换代替欧式距离公式计算近似圆柱体的轴和半径,节省了大量的计算时间。对于生成圆柱状结构,采用空间跳跃的体绘制方法进行加速绘制,进一步提高了漫游的实时性。实验结果证明该算法不仅速度快、效果好,而且具有很高的灵活性。According to the Virtual Endoscopy automatic navigation, using the Two-Distance Field-based 3D Center Path Finding Algorithm to find the path, adopting the Cylindrical Approximation of Tubular Organs to replace the Center Path by several approximate cylinders, while using distance transformation that is substituted by Euclidean distance to calculate the approximate cylinder＇s axis and radius, the algorithm can save much time. The cylindrical structure can be used to accelerate volume rendering using space leaping, the algorithm can achieve a better navigation of real-time. The result shows that this algorithm not only can obtain a speedy and effective result, but also has more flexibility.

关 键 词：虚拟内窥镜 自动漫游 圆柱状近似 距离场 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]