Scene classification based on local autocorrelation of similarities with subspaces

Authors:
Kazuhiro Hotta
Affiliations:
The University of Electro-Communications, Chofu, Tokyo, Japan
Venue:
ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
Year:
2009

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Abstract

This paper presents a scene classification method based on local autocorrelation of similarities with subspaces. Although conventional methods used bag-of-visual words for scene classification, superior accuracy of Kernel Principal Component Analysis (KPCA) of visual words to bag-of-visual words was reported. Here we also use KPCA of visual words to extract rich information for classification. In the original paper, all local parts mapped into subspace were integrated by summation to be robust to the order, the number, and shift of local parts. This approach discarded the effective properties for scene classification such as the relation with neighboring regions. To use them, we use Local AutoCorrelation (LAC) feature of the similarities with subspaces (outputs of KPCA of visual words). The feature has both the relation with neighboring regions and the robustness to shift of objects. The proposed method is compared with conventional scene classification methods using the same database and protocol. We demonstrate that the proposed method outperforms conventional methods.