Measurement of Facial Expression Intensity Based on Feature Point Tracking
Weihong Chen · Journal of Chongqing Institute of Technology · 2008
A method of measuring the expression intensity based on facial feature point tracking is presented,which is based on the L-K optical flow algorithm and uses the amended feature point tracking to track facial feature points.A nonlinear dimensionality reduction method is used to automatically generate the spectrum of expression intensity by extracting 1-D manifold from high dimensional feature point trajectories.Support Vector Machine is used to build the expression model and intensity model to classify the facial expressions and classify the intensity grade of happy expression.The experiment is done on the happy expression,and the intensity grade is introduced as measurement standard.Experiment results validate the effectiveness of this facial expression analysis method.