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A Local Bag-of-Features Model for Large-Scale Object Retrieval

  • Zhe Lin
  • Jonathan Brandt
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6316)

Abstract

The so-called bag-of-features (BoF) representation for images is by now well-established in the context of large scale image and video retrieval. The BoF framework typically ranks database image according to a metric on the global histograms of the query and database images, respectively. Ranking based on global histograms has the advantage of being scalable with respect to the number of database images, but at the cost of reduced retrieval precision when the object of interest is small. Additionally, computationally intensive post-processing (such as RANSAC) is typically required to locate the object of interest in the retrieved images. To address these shortcomings, we propose a generalization of the global BoF framework to support scalable local matching. Specifically, we propose an efficient and accurate algorithm to accomplish local histogram matching and object localization simultaneously. The generalization is to represent each database image as a family of histograms that depend functionally on a bounding rectangle. Integral with the image retrieval process, we identify bounding rectangles whose histograms optimize query relevance, and rank the images accordingly. Through this localization scheme, we impose a weak spatial consistency constraint with low computational overhead. We validate our approach on two public image retrieval benchmarks: the University of Kentucky data set and the Oxford Building data set. Experiments show that our approach significantly improves on BoF-based retrieval, without requiring computationally expensive post-processing.

Keywords

Image Retrieval Visual Word Query Image Integral Image Object Retrieval 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Zhe Lin
    • 1
  • Jonathan Brandt
    • 1
  1. 1.Adobe Systems, Inc 

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