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Similarity Features for Facial Event Analysis

  • Peng Yang
  • Qingshan Liu
  • Dimitris Metaxas
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5302)

Abstract

Each facial event will give rise to complex facial appearance variation. In this paper, we propose similarity features to describe the facial appearance for video-based facial event analysis. Inspired by the kernel features, for each sample, we compare it with the reference set with a similarity function, and we take the log-weighted summarization of the similarities as its similarity feature. Due to the distinctness of the apex images of facial events, we use their cluster-centers as the references. In order to capture the temporal dynamics, we use the K-means algorithm to divide the similarity features into several clusters in temporal domain, and each cluster is modeled by a Gaussian distribution. Based on the Gaussian models, we further map the similarity features into dynamic binary patterns to handle the issue of time resolution, which embed the time-warping operation implicitly. The haar-like descriptor is used to extract the visual features of facial appearance, and Adaboost is performed to learn the final classifiers. Extensive experiments carried on the Cohn-Kanade database show the promising performance of the proposed method.

Keywords

Facial Expression Training Sample Local Binary Pattern Facial Expression Recognition Facial Appearance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Peng Yang
    • 1
  • Qingshan Liu
    • 1
    • 2
  • Dimitris Metaxas
    • 1
  1. 1.Rutgers UniversityPiscatawayUSA
  2. 2.National Laboratory of Pattern RecognitionChinese Academy of SciencesBeijingChina

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