Quantitative analysis of facial paralysis using local binary patterns in biomedical videos

Shu He, J.J. Soraghan, Brian O'Reilly, D. Xing

Research output: Contribution to journalArticlepeer-review

82 Citations (Scopus)
6 Downloads (Pure)


Facial paralysis is the loss of voluntary muscle movement of one side of the face. A quantitative, objective, and reliable assessment system would be an invaluable tool for clinicians treating patients with this condition. This paper presents a novel framework for objective measurement of facial paralysis. The motion information in the horizontal and vertical directions and the appearance features on the apex frames are extracted based on the local binary patterns (LBPs) on the temporal-spatial domain in each facial region. These features are temporally and spatially enhanced by the application of novel block processing schemes. A multiresolution extension of uniform LBP is proposed to efficiently combine the micropatterns and large-scale patterns into a feature vector. The symmetry of facial movements is measured by the resistor-average distance (RAD) between LBP features extracted from the two sides of the face. Support vector machine is applied to provide quantitative evaluation of facial paralysis based on the House-Brackmann (H-B) scale. The proposed method is validated by experiments with 197 subject videos, which demonstrates its accuracy and efficiency.
Original languageEnglish
Pages (from-to)1864-1870
Number of pages7
JournalIEEE Transactions on Biomedical Engineering
Issue number7
Publication statusPublished - Jul 2009


  • biomechanics
  • biomedical measurement
  • feature extraction
  • image motion analysis
  • medical disorders
  • medical image processing
  • muscle
  • neurophysiology
  • patient treatment
  • pattern classification
  • support vector machines
  • video signal processing


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