Time-varying homotopy and the animation of facial expressions for 3D virtual space teleconferencing

Souichi Kajiwara; Hiromi T. Tanaka; Yasuichi Kitamura; Jun Ohya; Fumio Kishino

doi:10.1117/12.157967

22 October 1993 Time-varying homotopy and the animation of facial expressions for 3D virtual space teleconferencing

Souichi Kajiwara, Hiromi T. Tanaka, Yasuichi Kitamura, Jun Ohya, Fumio Kishino

Proceedings Volume 2094, Visual Communications and Image Processing '93; (1993) https://doi.org/10.1117/12.157967
Event: Visual Communications and Image Processing '93, 1993, Cambridge, MA, United States

Abstract

A homotopy describes the transformation of one arbitrary curve into another that shares the same endpoints. In this paper, we propose a deformable cylinder model, based on homotopy, in which an arbitrary surface interpolated between two contours via a blending function is transformed into another surface over time. We then show how this homotopic deformation can be applied to the realistic animation of human faces in a virtual space teleconferencing system. Specifically, we show that facial expressions such as wrinkling of the forehead and opening and closing of the mouth can be synthesized and animated in real time through 3D homotopic deformations.

Citation Download Citation

Souichi Kajiwara, Hiromi T. Tanaka, Yasuichi Kitamura, Jun Ohya, and Fumio Kishino "Time-varying homotopy and the animation of facial expressions for 3D virtual space teleconferencing", Proc. SPIE 2094, Visual Communications and Image Processing '93, (22 October 1993); https://doi.org/10.1117/12.157967

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