进一步解决基于互信息的配准算法在配准精度、速度和误配率之间的相互制约问题。提出一种新的配准参数搜索策略——三级配准，将平移、旋转参数分开搜索；在分析互信息配准的优点和局限性的基础上，将模糊理论中的欧几里德贴近度引入三级 配准过程中。实验结果表明，本文提出的配准策略在保持基于互信息配准精度不变的情况下，迭代步数、配准时间和误配率均有明显改善。-Further resolve the mutual information based registration algorithm in the alignment accuracy, speed, and mismatch between the rate of mutual constraints. A new registration parameter search strategy- 3 registration, would be translation and rotation parameters of separate search　in the analysis of mutual information registration of the advantages and limitations, based on the fuzzy theory in the Euclidean close 3 to introduce a registration process. Experimental results show that the proposed alignment strategy for maintaining the mutual information based registration accuracy of the same circumstances, the iteration step number, registration time and the error distribution rate showed significant improvement.