Abstract

Three-dimensional human head modeling is useful in video-conferencing or other vir-tual reality applications. However, manual construction of 3D models using CAD tools is often expensive and time-consuming. Here we present a robust and e cient method for the construction of a 3D human head model from perspective images viewing from di erent angles. In our system, A generic head model is rst used, then three images of the head are required to adjust the deformable contours on the generic modeltomakeit more closer to the target head. Our contributions are asfollows. Our system uses per-spective images that are more realistic than orthographic projection approximation used in earlier works. Also for shaping and positioning face organs, we present a method for estimating the camera focal length and the 3D coordinates of facial landmarks when the camera transformation is known. We also provide an alternative for the 3D coor-dinates estimation using epipolar geometry when the extrinsic parameters are absent. Our experiments demonstrated that our approach produces good and realistic results.

Citations