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외부 환경과 시간에 따라 변하는 인간 피부의 실사적 렌더링
서명국(Myoung Kook Seo),권혁진(Hyuk Jin kwon),이승주(Seung Joo Lee),박민기(Min Ki Park),Bilal Ahmed,이용이(Yong Yi Lee),정승종(Soon Jong Jung),이관행(Kwan H. Lee) (사)한국CDE학회 2013 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2013 No.1
The appearance of human skin is not constant over time. It is changed by several physical factors such as exercising, tanning, and washing. In this paper, we propose a method that can model the appearance of the human face and skin varied over time using the measured data. The proposed method uses a surface reflection model to describe the specular of skin that is dependent on oil or sweat. It adopts diffusion models to represent the translucent of skin affected by melanin and hemoglobin. To model the variation of the appearance over time, we measure the surface reflection and subsurface scattering of skin with an even time interval using an imaged-based measurement device. Based on the measured data, we develop time-varying functions that describe the variation of appearance and improve existing human models by applying the timevarying functions. We validate our method using rendering results for several conditions and simulate the appearance of skin under different conditions by controlling model parameters.