Facial Action Coding System: A Technique For The Facial Action Coding System

566 Words2 Pages

The most commonly used vision-based coding system is the facial action coding system (FACS) proposed by Ekman and Friesen [5] for The Facial Action Coding System: A Technique for the Measurement of Facial Movement, FACS enables facial expression analysis through standardized coding of changes in facial motion in terms of atomic facial actions called Action Units (AUs). The tracking and recognition of facial activities are characterized by three levels, first in the bottom level, facial feature points around each facial component is captured. Second in the middle level, Facial action units defined using the facial action coding system(FACS), represent the contribution of a specific set of facial muscles. Finally in the top level, six prototypical facial expressions represents the global facial muscle movement and are commonly used to describe the human emotion states.
Lyons et al. [6] Classifying facial attributes using a 2-D Gabor wavelet representation and discriminant analysis used a set of multi scale, multi orientation Gabor filters to transform the images first. The Gabor coef...

Open Document