密集标志点集的拓扑保持变换方法*

为了解决图像变换后拓扑结构不保持的问题,提出了一种密集标志点集情况下的拓扑保持变换方法.该方法首先确定拓扑不保持的局部区域;然后确定拓扑不保持区域的方向角;最后根据该方向角确定并删除密集标志点集中引起拓扑关系不保持的标志点,从而得到拓扑关系保持的变换结果.实验证明该方法能较好地解决密集标志点情况下的拓扑不保持问题,不仅效率高,而且配准效果好.

Preserving-topology transformation based on densely landmarks

In order to deal with the non-topology preservation occurred in transformed results, this paper proposed an approach of topology preservation transformation based on densely landmarks. Firstly, it needed to locate the local region which was not topology preservation. Then, determined the direction angle of the region. Next, the proposed approach determined and deleted the landmarks which caused the non-topology preservation. Finally, generated the topology preserving results by the optimal landmarks. Experimental results show that the proposed method can effectively address the problem of non-topology preserving under densely landmarks. Moreover, experiments also demonstrate the good performance of the proposed method.