Contextual Query Expansion for Image Retrieval
Contextual Query Expansion for Image Retrieval
复制标题
用于图像检索的上下文查询扩展
DOI:
10.1109/tmm.2014.2305909
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发表时间:
2014-06
期刊:
影响因子:
--
通讯作者:
Li Jintao
中科院分区:
文献类型:
--
作者:
Zhang Yongdong;Tan Jianlong;Guo Li;Li Jintao
In this paper, we study the problem of image retrieval by introducing contextual query expansion to address the shortcomings of bag-of-words based frameworks: semantic gap of visual word quantization, and the efficiency and storage loss due to query expansion. Our method is built on common visual patterns (CVPs), which are the distinctive visual structures between two images and have rich contextual information. With CVPs, two contextual query expansions on visual word-level and image-level are explored, respectively. For visual word-level expansion, we find contextual synonymous visual words (CSVWs) and expand a word in the query image with its CSVWs to boost retrieval accuracy. CSVWs are the words that appear in the same CVPs and have same contextual meaning, i.e. similar spatial layout and geometric transformations. For image-level expansion, the database images that have the same CVPs are organized by linked list and the images that have the same CVPs as the query image, but not included in the results are automatically expanded. The main computation of these two expansions is carried out offline, and they can be integrated into the inverted file and efficiently applied to all images in the dataset. Experiments conducted on three reference datasets and a dataset of one million images demonstrate the effectiveness and efficiency of our method.
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影响因子:
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