Estimating head posture from point cloud data of lower chin.

Abstract

We propose a method of estimating head posture with one depth sensor dangled from neck. The sensor located in front of chest measures point cloud of a lower chin, and then a center of gravity extracted from the measured point cloud. To obtain certain relationship between the center of gravity and head posture, we compare the center of gravity and a magnetic sensor with using regression analysis. Also we conducted user study to unveil accuracy of the method of estimating head posture. As a result, using regression analysis between center of gravity position of the chin and head posture, a head posture can be estimated with an accuracy of 5 degrees.