As the differences of the backgrounds and the distribution of the key areas in the images, if carring out similarity fully by comparing the corresponding regional areas of the images in the retrieval,it is easily to interfere the search results. To this problem, this paper presents a new idea that when doing the similarity compare of the two images based on ensuring information of the image edge, get the central areas respectively, and take two-way image matching, and then receive the similarity of two images by getting the sum of the two similarity. By the experimental test, this method can reduce interference and increase accuracy under the premise that retrieve time is close.
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