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Computational Intelligence and Neuroscience
Volume 2016 (2016), Article ID 6749325, 9 pages
http://dx.doi.org/10.1155/2016/6749325
Research Article

Histogram of Oriented Gradient Based Gist Feature for Building Recognition

1School of Information Engineering, Northeast Electric Power University, Jilin 132012, China
2School of Computer Science and Technology, Jilin University, Changchun 130012, China

Received 26 June 2016; Revised 19 September 2016; Accepted 10 October 2016

Academic Editor: Rodolfo Zunino

Copyright © 2016 Bin Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We proposed a new method of gist feature extraction for building recognition and named the feature extracted by this method as the histogram of oriented gradient based gist (HOG-gist). The proposed method individually computes the normalized histograms of multiorientation gradients for the same image with four different scales. The traditional approach uses the Gabor filters with four angles and four different scales to extract orientation gist feature vectors from an image. Our method, in contrast, uses the normalized histogram of oriented gradient as orientation gist feature vectors of the same image. These HOG-based orientation gist vectors, combined with intensity and color gist feature vectors, are the proposed HOG-gist vectors. In general, the HOG-gist contains four multiorientation histograms (four orientation gist feature vectors), and its texture description ability is stronger than that of the traditional gist using Gabor filters with four angles. Experimental results using Sheffield Buildings Database verify the feasibility and effectiveness of the proposed HOG-gist.