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Abstract
The feature extraction is the most critical step in image retrieval. Among various local feature extraction methods, scale-invariant feature transform (SIFT) has been proven to be the most robust local invariant feature descriptor, which is widely used in the field of image matching and retrieval. However, the SIFT algorithm has a disadvantage that the algorithm will produce a large number of feature points and is not suited for widely using in the field of image retrieval. Firstly, a novel significant measure algorithm is proposed in this paper, and the regions of interest in images are obtained. Then, SIFT features are extracted from salient regions, reducing the number of SIFT features. Our algorithm also abstracts color features from salient regions, and this method overcomes SIFT algorithm’s drawback that could not reflect image’s color information. The experiments demonstrate that the integrated visual saliency analysis-based feature selection algorithm provides significant benefits both in retrieval accuracy and in speed.
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