Facial Action Units Analysis using Rule-Based Algorithm

  • Authors

    • Hamimah Ujir
    • Irwandi Hipiny
    • D N.F. Awang Iskandar
  • facial action units, temporal analysis, facial expressions, dynamic analysis
  • Most works in quantifying facial deformation are based on action units (AUs) provided by the Facial Action Coding System (FACS) which describes facial expressions in terms of forty-six component movements. AU corresponds to the movements of individual facial muscles. This paper presents a rule based approach to classify the AU which depends on certain facial features. This work only covers deformation of facial features based on posed Happy and the Sad expression obtained from the BU-4DFE database. Different studies refer to different combination of AUs that form Happy and Sad expression. According to the FACS rules lined in this work, an AU has more than one facial property that need to be observed. The intensity comparison and analysis on the AUs involved in Sad and Happy expression are presented. Additionally, dynamic analysis for AUs is studied to determine the temporal segment of expressions, i.e. duration of onset, apex and offset time. Our findings show that AU15, for sad expression, and AU12, for happy expression, show facial features deformation consistency for all properties during the expression period. However for AU1 and AU4, their properties’ intensity is different during the expression period.


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  • How to Cite

    Ujir, H., Hipiny, I., & N.F. Awang Iskandar, D. (2018). Facial Action Units Analysis using Rule-Based Algorithm. International Journal of Engineering & Technology, 7(3.20), 284-290. https://doi.org/10.14419/ijet.v7i3.20.19167