Augmenting Physical Avatars using Projector-Based Illumination

作者：Bermano Amit^*; Brueschweiler Philipp; Grundhoefer Anselm; Iwai Daisuke; Bickel Bernd; Gross Markus

来源：ACM Transactions on Graphics, 2013, 32(6): 189.

DOI：10.1145/2508363.2508416

• projector-camera systems
• animatronics

Animated animatronic figures are a unique way to give physical presence to a character. However, their movement and expressions are often limited due to mechanical constraints. In this paper, we propose a complete process for augmenting physical avatars using projector-based illumination, significantly increasing their expressiveness. Given an input animation, the system decomposes the motion into low-frequency motion that can be physically reproduced by the animatronic head and high-frequency details that are added using projected shading. At the core is a spatio-temporal optimization process that compresses the motion in gradient space, ensuring faithful motion replay while respecting the physical limitations of the system. We also propose a complete multi-camera and projection system, including a novel defocused projection and subsurface scattering compensation scheme. The result of our system is a highly expressive physical avatar that features facial details and motion otherwise unattainable due to physical constraints.

• 出版日期2013-11