摘要
在基于配准的图像分割应用中,拓扑保持性是非刚性图像配准算法的一个重要约束.本文从矢量场特性出发,分析了Demons非刚性图像配准算法导致目标拓扑改变时变形场的特点.根据变形场特点与其雅可比行列式之间的关系,给出了校正该算法拓扑保持性的方法.实验表明,改进后的变形场具有了拓扑保持性.
Topology preservation is an important constraint of image non-rigid registration algorithms in the applications of registration based image segmentation. In this paper, the deformation field of the Demons non-rigid registration that make the object's topology change is analyzed according to the features of the vector field. An method that can enforce the algorithm's topology preservation is provided on the basis of relation between the deformation field and its Jacobian. The experiment results show that the modified deformation field is topology preserving.
出处
《自动化学报》
EI
CSCD
北大核心
2010年第1期179-183,共5页
Acta Automatica Sinica
基金
国家自然科学基金(30170259,30570475,60372081)
教育部博士点基金项目(20050141025)资助~~
关键词
非刚性配准
拓扑
雅可比行列式
矢量场分析
Non-rigid registration, topology, Jacobian determinant, vector field analysis