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      • An Image Retrieval Method Based on Visual Dictionary and Saliency Region

        Xu Gongwen,Xu Lina,Li Xiaomei,Tang Xiaobing,Wang Xiaoyan,Xu Chunxiu 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.7

        An image retrieval method based on the combination of visual dictionary and region of saliency was proposed in this paper, which aims to increase the accuracy of image retrieval. The image is divided into sampled blocks and the low-level features are extracted from these image blocks. Then a variety of features vectors are taken as the input vector for learning its corresponding visual dictionary respectively by non-negative sparse coding. Spatial information is added into the sparse representations of image by proposing the saliency polling method, and the similarity measure between sparse representation vectors is defined as SED (Squared Euclidean Distance), which considering the same nonzero entries and Euclidean distance of vectors at the same time. Results of experiment carried on Corel and Caltech datasets showed that this method can effectively improve the accuracy of image retrieval compared with the methods of single visual dictionary.

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