计算机科学 ›› 2014, Vol. 41 ›› Issue (6): 304-308.doi: 10.11896/j.issn.1002-137X.2014.06.061
华亮,丁立军,黄宇,冯浩,顾菊平
HUA Liang,DING Li-jun,HUANG Yu,FENG Hao and GU Ju-ping
摘要: 就3D医学图像配准数据量大、计算复杂度高、配准精度低的问题,提出一种基于Clifford代数几何不变量的配准方法,以实现人头颅部3D医学图像配准。提出配准所需的Clifford代数几何不变量及其Clifford代数方程算式,并构造适合于该几何参考轴旋转的Clifford几何旋转算子,利用所求的最大、最小值对应的Clifford几何不变量建立Clifford旋转算子,对浮动影像数据实现几何变换,以达到配准的结果。配准实验中对两个世界著名的3D医学数据集进行了测试,结果表明:该方法计算简单,几何意义直观,配准精度高,执行效率高,并且通过轴线变换不易陷入配准过程的局部极值点。
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