Head Movement Quantification and Its Role in Facial Expression Study

摘要

Temporal modeling of facial expression has been the interest of various fields of studies such as expression recognition, realism in computer animation and behavioral study in psychological field. While various researches are actively being conducted to capture the movement of facial features for its temporal property, works in term of the head movement during the facial expression process is lacking. The absence of head movement description will make expression description to be incomplete especially in expression that involves head movement such as disgust. Therefore, this paper proposes a method to track the movement of the head by using a dual pivot head tracking system (DPHT). In proving its usefulness, the tracking system will then be applied to track the movement of subjects depicting disgust. A simple statistical two-tailed analysis and visual rendering comparison will be made with a system that uses only a single pivot to illustrate the practicality of using DPHT. Results show that better depictions of expression can be implemented if the movement of the head is incorporated in the facial expression study.