This research is also useful to linguists since the facial expression is of linguitical importance. An example of this is in sign language, where the facial expression is an important part of syntax. Problem Definition Given a digitized video of one or more speakers, detect the facial expressions and mark the sections of different facial movements respectively. A region growing method is used to determine the edges of the faces and eliminate duplicates. If certain difference is found,we consider there is lip motion.
New experiments are in progress to extend previous work on lip motion to eyebrow motion.
Another consideration is to approach eyebrow movement detection by using some reference points. In eyemovement detection, there is another way to locate the eyes, in which the texture of the pupils is the key reference. Some problems of facial expression detection are still open. Charles B. Owen and Fillia Makedon. Charles Owen and Fillia Makedon.