文档介绍：薄板样条插值的改进及其在图像配准中的应用
刘茹焕①王博亮①②黄晓阳①
摘要薄板样条插值是应用较多的弹性配准方法。深入研究了这种方法,并就此方法的不足,采用薄板样条归一化弹性近似策略,减少了因标记点定位带来的配准误差,提出了在插值过程中加入邻近插值、加权插值的混合插值方法,同时边界处理等改进策略,使得薄板样条插值具有可靠的平滑性。
关键词弹性配准薄板样条平滑处理加权插值
Thin spline interpolation improvement and application in image registration
Ru-huan Liu, Bo-liang WANG, Xiao-yang HUANG // China Digital Medicine.
Key words: Elastic registration; Thin plate spline; Smoothing process; Weighted interpolation
Abstract: Thin place spline interpolation, mon used method for elastic registration, is deeply studied. For the disadvantages of the method, using the normalized elastic thin spline approximate strategy to reduce the error of registration from marker point location. Adjacent interpolation and weighted interpolation are added to the process of interpolation. In addition, proposed boundary treatment strategies, making spline interpolation has reliable smoothness.
Corresponding author Department puter Science, Xiamen University, Xiamen 361005, Fujian Province,.
This work was supported by the National Nature Science Foundation of China (60701022 and 60601025); And the Science Research Foundation of ministry of Health & United Fujian Provincial Health and Education Project for Tacking the Key Research, P. R. China(WKJ2005-2-001).
0 引言
图像配准是指对于一幅图像寻求一种(或一系列) 空间变换,使它与另一幅图像上的对应点达到空间上的一致。这种一致是指人体上的同一解剖点在两张匹配图像上有相同的空间位置[1]。也就是寻找两个 2D 或 3D 图像之间的空间映射和对应关