Augmenting physical avatars using projector-based illumination

A. Bermano, P. Bruschweiler, A. Grundhöfer, D. Iwai, B. Bickel, M. Groß, ACM Transactions on Graphics 32 (2013).

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Abstract
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.
Publishing Year
Date Published
2013-11-01
Journal Title
ACM Transactions on Graphics
Volume
32
Issue
6
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Bermano A, Bruschweiler P, Grundhöfer A, Iwai D, Bickel B, Groß M. Augmenting physical avatars using projector-based illumination. ACM Transactions on Graphics. 2013;32(6). doi:10.1145/2508363.2508416
Bermano, A., Bruschweiler, P., Grundhöfer, A., Iwai, D., Bickel, B., & Groß, M. (2013). Augmenting physical avatars using projector-based illumination. ACM Transactions on Graphics, 32(6). https://doi.org/10.1145/2508363.2508416
Bermano, Amit, Philipp Bruschweiler, Anselm Grundhöfer, Daisuke Iwai, Bernd Bickel, and Markus Groß. “Augmenting Physical Avatars Using Projector-Based Illumination.” ACM Transactions on Graphics 32, no. 6 (2013). https://doi.org/10.1145/2508363.2508416.
A. Bermano, P. Bruschweiler, A. Grundhöfer, D. Iwai, B. Bickel, and M. Groß, “Augmenting physical avatars using projector-based illumination,” ACM Transactions on Graphics, vol. 32, no. 6, 2013.
Bermano A, Bruschweiler P, Grundhöfer A, Iwai D, Bickel B, Groß M. 2013. Augmenting physical avatars using projector-based illumination. ACM Transactions on Graphics. 32(6).
Bermano, Amit, et al. “Augmenting Physical Avatars Using Projector-Based Illumination.” ACM Transactions on Graphics, vol. 32, no. 6, ACM, 2013, doi:10.1145/2508363.2508416.

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