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 Partial-duplicate Image Retrieval via Exploiting Visual Saliency

  

  1. School of Computer Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
  • Received:2014-12-19 Online:2015-04-27 Published:2015-04-29

Abstract:

 Bag-of-Word (BoW) model is widely used to represent the visual content of images in state-of-the-art image retrieval systems. Since traditional BoW models
discard geometric relationships among local features, exploiting geometric constraints as post-processing steps has been demonstrated to significantly improve the performance.
Each local feature is treated equally in these methods. In practice, the importance of local features for image retrieval is different. For example, the local features in the
duplicate image regions are more important that ones in the background image regions. Towards this end, a new partial-duplicate image retrieval method is proposed by leveraging
the importance of local features. First, visual saliency method is introduced to calculate the importance of each pixel, and then the importance is used to weight the similarity
of matched points. To verify the performance of the proposed method, extensive experiments are conducted on the widely-used datasets and experimental results show the
outperformance of the propose method.

Key words: image retrieval, duplicate image, visual saliency, geometry verification