A Hybrid Supervised-Unsupervised Vocabulary Generation Algorithm for Visual Concept Recognition

  • Alexander Binder
  • Wojciech Wojcikiewicz
  • Christina Müller
  • Motoaki Kawanabe
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6494)

Abstract

Vocabulary generation is the essential step in the bag-of-words image representation for visual concept recognition, because its quality affects classification performance substantially. In this paper, we propose a hybrid method for visual word generation which combines unsupervised density-based clustering with the discriminative power of fast support vector machines. We aim at three goals: breaking the vocabulary generation algorithm up into two sections, with one highly parallelizable part, reducing computation times for bag of words features and keeping concept recognition performance at levels comparable to vanilla k-means clustering. On the two recent data sets Pascal VOC2009 and Image-CLEF2010 PhotoAnnotation, our proposed method either outperforms various baseline algorithms for visual word generation with almost same computation time or reduces training/test time with on par classification performance.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Alexander Binder
    • 1
  • Wojciech Wojcikiewicz
    • 1
    • 2
  • Christina Müller
    • 1
    • 2
  • Motoaki Kawanabe
    • 1
    • 2
  1. 1.Machine Learning GroupBerlin Institute of TechnologyBerlinGermany
  2. 2.Fraunhofer Institute FIRSTBerlinGermany

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