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

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

Research output: Contribution to journal › Conference article › peer-review

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.

Original language	English
Pages (from-to)	37-48
Number of pages	12
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	2094
DOIs	https://doi.org/10.1117/12.157967
Publication status	Published - 1993
Externally published	Yes
Event	Visual Communications and Image Processing 1993 - Cambridge, MA, United States Duration: 1993 Nov 7 → 1993 Nov 7

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.157967

Cite this

Time-varying homotopy and the animation of facial expressions for 3d virtual space teleconferencing. / Kajiwara, Souichi; T. Tanaka, Hiromi; Kitamura, Yasuichi; Ohya, Jun; Kishino, Fumio.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 2094, 1993, p. 37-48.

Research output: Contribution to journal › Conference article › peer-review

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AU - Kishino, Fumio

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AB - 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.

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JO - Proceedings of SPIE - The International Society for Optical Engineering

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T2 - Visual Communications and Image Processing 1993

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

Abstract

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