Self adaptive animation based on user perspective

Chaudhuri, P., Papagiannakis, G., Magnenat-Thalmann, N., “Self adaptive animation based on user perspective”, The Visual Computer, Springer-Verlag, 24(7-9), pp. 525-533, July 2008, also presented in CGI08


In this paper we present a new character animation technique in which the animation adapts itself based on the change in the user’s perspective, i.e., when the user moves, so that their point of viewing the animation changes, then the character animation adapts itself, in response to that change. The resulting animation, generated in real-time, is a blend of key animations provided a priori by the animator. The blending is done with the help of efficient dual-quaternion transformation blending. The user’s point of view is tracked using either, computer vision techniques or a simple user-controlled input modality, such as mouse-based input. This tracked point of view is then used to suitably select the blend of animations. We show a way to author and use such animations in both Virtual as well as Augmented Reality scenarios and demonstrate that it significantly heightens the sense of presence for the users when they interact with such self adaptive animations of virtual characters. [PDF]