传统聚类算法仅考虑属性相似性，较少利用对象间的相互关系。
Traditional clustering method for attribute space ignores the object relationship information.
应该说，特征空间关系一致性和特征属性相似性是进行可靠特征匹配不可或缺的两个方面，是同等重要的。
It must be stressed that spatial relations and feature similarity are two indispensable aspects of reliable image registration, and both are of equivalent importance.
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