Research Projects: Automatic Creation of Three-Dimensional Avatars
Traditionally, the acquisition of three-dimensional avatars from real humans relied on the utilization of body suits, optical or magnetic markers, or complex and expensive three-dimensional scanners. In general, entertainment companies, especially those dedicated to computer games and computer-animated movies, have invested into and leveraged from these techniques. Some of the main drawbacks that these capture systems introduce are equipment cost, portability and the required degree of human intervention to ensure compelling visual results. Alternative techniques have been investigated by the computer vision community, aimed at reconstructing human body models from video sequences or sets of static images. However, the primary focus of these techniques generally was on motion analysis and tracking whereas reconstruction of realistic avatars was only a secondary objective. This project consists of developing an avatar construction pipeline designed to use multiple standard video cameras for the creation of realistic three-dimensional avatars that can be included into interactive virtual environments. Multiple images of a human subject are used to automatically reshape a synthetic three-dimensional articulated reference model into a high-quality avatar. The pipeline under development combines software and hardware-accelerated stages into one seamless system. Primary stages in this pipeline include pose estimation, skeleton fitting, body part segmentation, geometry construction and texturing. Silhouette-based modification techniques in combination with a reference model remove traditional constraints in the initial pose of the captured subject. Results can be obtained in near-real time with very limited user intervention.
This research is supported by the National Science Foundation (NSF), the California-Catalonia Program for Engineering Innovation and the Balsells Fellowship Program.
- Villa-Uriol, M.-C., Sainz, M., Kuester, F., and Bagherzadeh, N. (2003). Automatic creation of threedimensional avatars. In El-Hakim, S. F., Gruen, A., and Walton, J. S., editors, SPIE-IS&T Electronic Imaging (EI 2003), volume 5013 of Videometrics, pages 14–25, Santa Clara, California, USA.
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