rectangular neighborhood

By the grid-based method,NDOD expands square neighborhood by breadth-first search,it can reduce neighbo.

NDOD吸收基于网格方法的思想,以广度优先扩张方形邻域,成倍地减少了邻域查询的次数,从而快速排除聚类点并克服基于网格方法中的"维灾"。