Vision Reading #1

Human facial expressions are a complex combination of many facial movements and positions. While some people would say that an expression exists at one single point in time, it is more useful to view an expression as being a sequence of different facial positions over a certain amount of time. One can then not only analyze the position of features on the face, but also plot how the features deform, and how move in relation to each other. If two different sequences of images of faces have approximately the same deformations of the same features, we might be able to guess that those faces may be making the same expressions.

Joe Bayes, jbayes@cc.gatech.edu