Visional feature extraction, highdimensionalindexing mechanism and relevance feedback are three important issues in content-based image retrieval.
低层视觉特征提取、高维数据索引机制和相关反馈方法是面向大规模图像库基于内容检索的三个关键问题。
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In the similarity query processing based on highdimensionalindexing, the searching space is usually narrowed down by pruning the inactive subspaces which do not contain any query results.