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An improved 3D shape context registration method for non-rigid surface registration

机译:用于非刚性表面配准的改进的3D形状上下文配准方法

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3D shape context is a method to define matching points between similar shapes as a pre-processing step to non-rigid registration. The main limitation of the approach is point mismatching, which includes long geodesic distance mismatch and neighbors crossing mismatch. In this paper, we propose a topological structure verification method to correct the long geodesic distance mismatch and a correspondence field smoothing method to correct the neighbors crossing mismatch. A robust 3D shape context model is proposed and further combined with thin-plate spline model for non-rigid surface registration. The method was tested on phantoms and rat hind limb skeletons from micro CT images. The results from experiments on mouse hind limb skeletons indicate that the approach is robust.
机译:3D形状上下文是一种定义相似形状之间的匹配点的方法,作为非刚性配准的预处理步骤。该方法的主要局限性是点不匹配,其中包括长测地距离不匹配和邻居穿越不匹配。在本文中,我们提出了一种拓扑结构验证方法来纠正长测地距离不匹配问题,以及一种对应场平滑方法来纠正邻居的穿越交叉不匹配问题。提出了鲁棒的3D形状上下文模型,并将其进一步与薄板样条模型结合以用于非刚性表面配准。该方法已通过微型CT图像在人体模型和大鼠后肢骨骼上进行了测试。对小鼠后肢骨骼进行实验的结果表明,该方法是可靠的。

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