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GPCA-SIFT: A new local feature descriptor for scene image classification

  • Lei Ju
  • , Ke Xie
  • , Hao Zheng
  • , Baochang Zhang
  • , Wankou Yang*
  • *Corresponding author for this work
  • Southeast University, Nanjing
  • Nanjing Xiaozhuang College

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

In this paper, a new local feature descriptor called GPCASIFT is proposed for scene image classification. Like PCA-SIFT, we get the key points using the detection method in Scale Invariant Feature Transform (SIFT) and extract a 41 * 41 patch for each key point. Then we calculate the horizontal and vertical gradient of each pixel in the patch. However, instead of concatenating two gradient matrices, we directly work with the two-dimensional matrix and apply Generalized Principal Component Analysis (GPCA) to reduce it to a lower-dimensional matrix. Finally, we concatenate the reduced matrix and form a 1D vector. Compared with Principal Component Analysis (PCA), it preserves more spatial locality information. When applied in multi-class scene image classification, our proposed descriptor outperforms other related algorithms in terms of classification accuracy.

Original languageEnglish
Title of host publicationPattern Recognition - 7th Chinese Conference, CCPR 2016, Proceedings
EditorsTieniu Tan, Xilin Chen, Xuelong Li, Jian Yang, Hong Cheng, Jie Zhou
PublisherSpringer Verlag
Pages286-295
Number of pages10
ISBN (Print)9789811030048
DOIs
StatePublished - 2016

Publication series

NameCommunications in Computer and Information Science
Volume663
ISSN (Print)1865-0929

Keywords

  • GPCA
  • GPCA-SIFT
  • SIFT
  • Scene image classification

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