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Scalable object recognition using hierarchical quantization with a vocabulary tree
Scalable object recognition using hierarchical quantization with a vocabulary tree
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机译:使用带有词汇树的分层量化的可扩展对象识别
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摘要
An image retrieval technique employing a novel hierarchical feature/descriptor vector quantizer tool—‘vocabulary tree’, of sorts comprising hierarchically organized sets of feature vectors—that effectively partitions feature space in a hierarchical manner, creating a quantized space that is mapped to integer encoding. The computerized implementation of the new technique(s) employs subroutine components, such as: A trainer component of the tool generates a hierarchical quantizer, Q, for application/use in novel image-insertion and image-query stages. The hierarchical quantizer, Q, tool is generated by running k-means on the feature (a/k/a descriptor) space, recursively, on each of a plurality of nodes of a resulting quantization level to ‘split’ each node of each resulting quantization level. Preferably, training of the hierarchical quantizer, Q, is performed in an ‘offline’ fashion.
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机译:一种图像检索技术,采用了新颖的分层特征/描述符矢量量化器工具“词汇树”,其中包括按层次结构组织的特征矢量集,可以有效地以分层方式划分特征空间,从而创建映射到整数编码的量化空间。新技术的计算机化实现采用了子例程组件,例如:该工具的培训器组件生成一个分层量化器Q,用于新的图像插入和图像查询阶段。通过在结果量化级别的多个节点中的每个节点上递归在特征(a / k / a描述符)空间上运行k-means来生成分层量化工具Q,以“拆分”每个结果的每个节点量化水平。优选地,以“离线”方式执行分级量化器Q的训练。
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