The Journal of the Korea Contents Association (한국콘텐츠학회논문지)

The Korea Contents Association (한국콘텐츠학회)
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Realistic Expression Factor to Visual Presence of Virtual Avatar in Eye Reflection

가상 아바타의 각막면에 비친 반사영상의 시각적 실재감에 대한 실감표현 요소

  • 원명주 (상명대학교 대학원 감성공학과) ;
  • 이의철 (상명대학교 소프트웨어대학 컴퓨터과학과) ;
  • 황민철 (상명대학교 소프트웨어대학 디지털미디어학과)
  • Received : 2013.05.13
  • Accepted : 2013.07.08
  • Published : 2013.07.28
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Abstract

In the VnR (Virtual and Real Worlds) of recent virtual reality convergence, the modelling of realistic human face is focused on the facial appearance such as the shape of facial parts and muscle movement. However, the facial changing parameters caused by environmental factors beyond the facial appearance factors can be regarded as important ones in terms of effectively representing virtual avatar. Therefore, this study evaluates user's visual feeling response according to the opacity variation of eye reflection of virtual avatar which is considered as a new parameter for reprenting realistic avatar. Experimental result showed that more clear eye reflection induced more realistic visual feeling of subjects. This result can be regarded as a basis for designing realistic virtual avatar by supporting a new visual realistic representing factor (eye reflection) and its degree of representation (reflectance ratio).

최근 가상환경에서는 실재감 있는 인간의 얼굴 모델을 설계하기 위하여 얼굴의 형태나 근육의 움직임과 같이 단순히 일반적인 표현요소를 중심으로 모델링 되고 있다. 하지만, 이러한 얼굴 자체의 외형적 요소 이외에도 외적 요소에 의한 얼굴 부분의 변화 인자는 가상 아바타를 효과적으로 표현하기 위한 중요한 요소이다. 따라서 본 연구에서는 가상 아바타의 각막면에 비친 반사영상(eye reflection)을 기반으로 사용자의 시각적 실재감에 대한 반응을 평가한다. 실험결과, 각막면의 반사율을 크게 하여 반사영상이 뚜렷하게 나타난 경우 높은 실감을 느끼는 것으로 나타났다. 이 결과는 새로운 시각적 실감표현요소를 제안하고, 제안된 실감표현요소의 구체적인 표현 범위를 제시함으로써 사실적인 가상 아바타를 설계하기 위한 기초 연구로써 활용 가능할 것으로 사료된다.

Keywords

References

  1. S. Mills and J. Noyes, "Virtual reality: an overview of user-related design issues revised paper for special issue on "Virtual reality: User Issues" in Interacting with Computers, May 1998," J. of Interacting with computers, Vol.11, No.4, pp.375-386, 1999. https://doi.org/10.1016/S0953-5438(98)00057-5
  2. C. Greenhalgh and S. Benford, "Supporting rich and dynamic communication in large scale collaborative virtual environments," J. of In Presence:Teleoperators and Virtual Environments, Vol.8, No.1, pp.14-35, 1999. https://doi.org/10.1162/105474699566026
  3. J. Jin, M. Park, H. Ko, and H. Byun, "Immersive Telemeeting with Virtual Studio and CAVE," J. of Proceedings of International Workshop on Advanced Image Technology, pp.15-20.
  4. W. S. Bainbridge, "The scientific research potential of virtual worlds," J. of Science, Vol.317, No.5837, pp.472-476, 2007. https://doi.org/10.1126/science.1146930
  5. S. Shirmohammadi and N. D. Georganas, "An end-to-end communication architecture for collaborative virtual environments," J. of Computer Networks, Vol.35, No.2, pp.351-367, 2001. https://doi.org/10.1016/S1389-1286(00)00186-9
  6. M. Slater, D. Pertaub, and A. Steed, "Public speaking in virtual reality: Facing an audience of avatars," J. of Computer Graphics and Applications, IEEE, Vol.19, No.2, pp.6-9, 1999.
  7. W. Barfield and C. Hendrix, "The effect of update rate on the sence of presence in virtual environment," J. of Virtual reality: Research, Development, Applications, Vol.1, No.1, pp.3-15, 1995. https://doi.org/10.1007/BF02009709
  8. S. Gibbs, C. Arapis, C. Breiteneder, V. Lalioti, S. Mostatawy, and J. Speier, "Virtual studios: an overview," J. of IEEE Multimedia, Vol.5, No.1, pp.18-35, 1998. https://doi.org/10.1109/93.664740
  9. D. Decarlo, D. Metaxas, and M. Stone, "An anthropometric face model using variational techniques," J. of In Computer Graphics (SIGGRAPH '98 Proceedings), pp.67-74, 1998.
  10. E. Petajan, "Very low bitrate face animation coding in MPEG-4," J. of In Encyclopedia of Telecommunications, Vol.17, pp.209-231, 1999.
  11. Y. Lee, K. Waters, and D. Terzopoulos, "Realistic modeling for facial animation," J. of In Computer Graphics (SIGGRAPH '95 Proceedings), pp.55-62, 1995.
  12. N. Adamo-Villani, G. Beni, and J. White, "3D simulator of ocular motion and expression," J. of ICIT 2005-International Conference on Information Technology, pp.122-127, 2005.
  13. K. Mania and A. Chalmers, "The Effects of Levels of Immersion on Memory and Presence in Virtual Environments: A reality Centered Approach," J. of CyberPsychology & Behavior, Vol.4, No.2, pp.247-264, 2001. https://doi.org/10.1089/109493101300117938
  14. M. J. Won, S. Park, C. J. Kim, E. C. Lee, and M. Whang, "Visual factor Evaluation for the Measurement of Subjective Virtual Realization,"J. of the Science of Emotion & Sensibility, Vol.15, No.3, pp.389-398, 2012.

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