J4 ›› 2010, Vol. 37 ›› Issue (3): 534-540.doi: 10.3969/j.issn.1001-2400.2010.03.027

• Original Articles • Previous Articles     Next Articles

Key dimension filtering based search algorithm of B+Tree for image feature matching

HE Zhou-can;WANG Qing;YANG Heng   

  1. (School of Computer Sci. and Eng., Northwestern Polytechnical Univ., Xi’an  710072, China)
  • Received:2008-12-18 Online:2010-06-20 Published:2010-07-23
  • Contact: HE Zhou-can E-mail:hezhoucan@163.com

Abstract:

In dealing with the issues of low efficiency and low accuracy in multiple wide-based-line image matching,this paper adopts the classical SIFT descriptor, and proposes a novel high dimensional feature search algorithm. This paper follows the distance-based similarity standard, and firstly partitions the image feature set into different classes, then establishes a B+Tree for each class, and finally gives out a key dimension filtering strategy(KDF) in the KNN search step to speed up the high dimensional feature matching. Experimental results show that the proposed algorithm, which can obtain a higher accuracy with a lower time cost than the classical KNN search algorithm such as BBF, LSH and so on, would be a help to improve the capability of multiple wide-based-line image matching.

Key words: feature matching, SIFT, KNN, B+Tree, key dimension filtering, image retrieval