dear reader I am not aware of any finished studies of such changes, but I am very interested in the subject.
I'm currently working on a 3d Active appearance model of the human face. I'm interested in using such a model to construct some sort of an 'emotional state machine'. To achieve this goal I hope to be recording the paths in 'face space' which is explored during a facial animation (eg. during facial changes from emotion 'surprise' to 'happy', etc). If you have any knowledge on work done in this area ... please post. Have a Lovely one brian lading == Replies will be sent to list. For more information see http://life.bio.sunysb.edu/morph/morphmet.html.
