三维图像虚拟切片插值算法的比较

Comparison of Interpolation Algorithms for Resliceing

由于三维数据场中各点间的距离不一致,特别是层间距离往往要比同一层的像素间的距离大很多,所以在进行任意方向的虚拟切片的提取时要进行三维插值,文中介绍了在虚拟切片提取中常用的三种插值算法:最近邻点插值、三线性插值以及三立方插值,并对这三种方法所得的切片图像进行了比较。最后讨论了这三种算法的各自的优缺点及适用范围。

The distances between every two points in 3D dataset are usually different, particularly the distance between two adjacent layers is much longer than the distance between the two near points in one layer. So, Interpolation is needed when getting slice in an arbitrary direction. Three interpolation algorithms are described in this paper, that is, the nearest neighbor interpolation, trilinear interpolation, and tricube interpolation. The experiment results obtained by these three methods are compared. Finally, the advantages and disadvantages of these three methods are discussed and the applications of these three methods also given.