KNN query is one of the most representative queries in multimedia database management system. It shows the result of k objects nearest to the query point.
KNN查询是多媒体数据库管理系统中最具代表性的查询方式之一，它将k个与查询点最接近的对象作为查询结果返回。
Searches based on content similarities in large multimedia libraries are essentially K nearest neighbor searches in high dimensional Spaces.
大容量多媒体数据库的基于内容相似性的检索本质上是高维特征空间中一定距离函数的K近邻问题。
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