文献类型：期刊文献

英文题名：Image retrieval using the extended salient region

作者：Zhang, Jing[1];Feng, Shengwei[1];Li, Da[1];Gao, Yongwei[1];Chen, Zhihua[1];Yuan, Yubo[1]

机构：[1]East China Univ Sci & Technol, Dept Comp Sci & Engn, Shanghai 200237, Peoples R China

年份：2017

卷号：399

起止页码：154

外文期刊名：INFORMATION SCIENCES

收录：;EI(收录号：20171203469819);WOS:【SCI-EXPANDED(收录号:WOS:000400203900009)】；

基金：This research is supported by the National Nature Science Foundation of China (Grants 61402174,61370174 and 61672228) and by the National High Technology Research and Development Program of China (863 Program) under Grant (No. 2015AA020107). The authors would like to offer their sincere thanks to the reviewers, whose comments and suggestions were crucial in improving the presentation and the technical accuracy.

语种：英文

外文关键词：Extended salient region; Region matching; MLAP; Image retrieval; Image processing

摘要：The salient region is the most important part of an image. The salient portion in images also attracts the most attention when people search for images in large-scale datasets. However, to improve image retrieval accuracy, considering only the most salient object in an image is insufficient because the background also influences the accuracy of image retrieval. To address this issue, this paper proposes a novel concept called the extended salient region (ESR). First, the salient region of an input image is detected using a Region Contrast (RC) algorithm. Then, a polar coordinate system is constructed; the centroid of the salient region is set as the pole. Next, the regions surrounding the salient region are determined by the neighboring regions, moving in a counterclockwise direction. The resulting combination of the salient region and its surrounding regions is defined as the ESR. We extract the visual content from the ESR using the well-known Bag of Words (BoW) model based on Gabor, SIFT and HSVH features and propose a graph model of the visual content nodes to represent the input image. Then, we design a novel algorithm to perform matching between two images. We also define a new similarity measure by combining the similarities of the salient region and the surrounding regions using weights. Finally, to better evaluate the image retrieval accuracy, an improved measure called the mean label average precision (MLAP) is proposed. The results of experiments on three benchmark datasets (Corel, TU Darmstadt, and Caltech 101) demonstrate that our proposed ESR model and region-matching algorithm are highly effective at image retrieval, and can achieve more accurate query results than current state-of-the-art methods. (C) 2017 Elsevier Inc. All rights reserved.