• Journal of the Korea Computer Graphics Society
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• v.17 no.1
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• pp.9-16
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• 2011

In this paper, we describe the development of a system for generating a 3-dimensional human face and predicting it's appearance as it ages over subsequent years using 3D scanned facial data and photo images. It is composed of 3-dimensional texture mapping functions, a facial definition parameter input tool, and 3-dimensional facial prediction algorithms. With the texture mapping functions, we can generate a new model of a given face at a specified age using a scanned facial model and photo images. The texture mapping is done using three photo images - a front and two side images of a face. The facial definition parameter input tool is a user interface necessary for texture mapping and used for matching facial feature points between photo images and a 3D scanned facial model in order to obtain material values in high resolution. We have calculated material values for future facial models and predicted future facial models in high resolution with a statistical analysis using 100 scanned facial models.

• The KIPS Transactions:PartA
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• v.17A no.6
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• pp.281-288
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• 2010

In this paper, we describe the development of a system for generating a 3-dimensional human face using 3D scanned facial data and photo images, and morphing animation. The system comprises a facial feature input tool, a 3-dimensional texture mapping interface, and a 3-dimensional facial morphing interface. The facial feature input tool supports texture mapping and morphing animation - facial morphing areas between two facial models are defined by inputting facial feature points interactively. The texture mapping is done first by means of three photo images - a front and two side images - of a face model. The morphing interface allows for the generation of a morphing animation between corresponding areas of two facial models after texture mapping. This system allows users to interactively generate morphing animations between two facial models, without programming, using 3D scanned facial data and photo images.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.29 no.2 s.43
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• pp.1-35
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• 2003

새 천년으로 들어선 2000년도부터 우리나라의 65세 이상 노령인구는 $7.1{\%}$를 차지하게 되어 본격적인 노령화사회 (UN에서 65세 이상인구가 총 인구의 $7{\%}$ 이상일 경우 노령화 사회로 정의)로 진입하였다. 평균수명의 계속적인 증가에 따라 노인 인구는 급격히 늘어날 전망이며, 따라서 노인성 질환의 발생도 늘어나게 되어 가정 또는 사회가 떠 맡아야할 경제적, 정신적 부담은 더욱 증가하게 된다. 건강하고 행복한 인생의 황혼기를 보내는 것은 인간의 권리이며 누구나 바라는 소망이다. 피부의 노화현상은 심장질환, 암 등에 못지 않게 중요하며, 노인의 경제적, 사회적 활동을 심각하게 위축시키고 있다. 피부노화를 예방하고 노인성 피부질환을 치료할 수 있는 방법을 개발함으로써 노인의 경제, 사회활동을 활동적으로 유지시킬 수 있다. 피부노화는 크게 두 종류로 나눌 수 있다. 그 한가지는 내인성노화(intrinsic aging)로서 세월이 흘러감에 따라 피할 수 없는 노화 현상을 말한다. 두번째는 광노화 (photoaging)로서 오랫동안 햇빛에 노출된 얼굴, 손등, 목뒤 등의 피부에서 관찰되는 노화현상을 말하는 것으로 내인성노화 현상과 자외선에 의한 영향이 합쳐진 결과로 발생한다. 광노화 현상은 자외선의 노출을 피하면 예방할 수 있는 피부노화 현상이다. 내인성 노화는 햇빛에 노출되지 않은 피부에서 주로 관찰된다. 임상적 특징은 비교적 경미하며, 잔주름, 피부건조증, 탄력감소 등을 들 수 있다. 그러나 광노화의 임상적 특징은 내인성 노화에 비하여 심하고, 일찍부터 관찰된다. 내인성 노화에 비하여 굵고 깊은 주름이 발생하며, 잔주름도 많이 발생한다. 햇빛에 노출된 피부에 불규칙한 색소침착이 발생하며 일광흑자 (solar lentigo) 등의 색소질환이 증가한다. 피부가 매우 거칠고, 건조해지며, 탄력성이 감소하여 심한경우 피부가 처지게 된다. 피부노화의 대표적인 증상은 주름살이며, 아직까지 그 발생기전에 대하여는 여러 가지 학설이 있으나 정확히 알려져 있지 않다. 피부에 존재하는 교원질, 탄력섬유등 기질단백질의 손상이 피부 주름살의 주 원인으로 알려져 있다. 또한 얼굴에 존재하는 근육의 분포와 움직임, 유전적 소인, 자외선, 흡연, 폐경, 산화적 손상, 열 등 여러 원인이 복합적으로 작용할 것으로 생각된다. 피부주름살의 원인을 밝히고, 원인인자가 피부주름살을 초래하는 분자생물학적 기전을 이해함으로써 주름살을 예방하고 치료할 수 있는 새로운 방법을 개발할 수 있다.

• The Korean Journal of Physiology
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• v.20 no.1
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• pp.65-77
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• 1986

To elucidate the effect of exercise on blood concentrations of ethanol, lactate and glucose in men who show facial flush after ethanol ingestion, 59 healthy male college students were studied. After 6 or more hours of fasting, the subjects were administered 3 ml of 25% ethanol solution(Soju) per liter of total body water. For control experiment Soju was replaced with the same dose of water. Exercise performed was vertical jumping on a rebounder for 3 min immediately after drinking. The subjects were classified into 6 groups: water ingestion(W), flushed (F) and non-flushed (N) groups after ethanol ingestion, water ingestion and exercise(WE), flushed(FE) and non-flushed (NE) groups after ethanol ingestion and exercise. Blood ethanol concentration in the exercise groups(NE, FE) was lower until 60 min after drinking than that in the non-exercise groups(N,F). Factor k representing the rate of ethanol absorption was markedly lower in the exercise groups than in the non-exercise groups. The flushed groups(F,FE) showed higher blood ethanol level than the non-flushed groups (N,NE) from 30 to 120 min after drinking. Blood lactate concentration in WE group was elevated immediately after exercise and returned to the resting level at 60 min after exercise. Ethanol increased blood lactate level from 30 to 120 min after ethanol drinking, Exercise after ethanol ingestion produced a sharp increase and then drop in blood lactate level which was stilled significantly higher than the resting level all the way through 120 min. Blood glucose concentration was decreased at 15 min after exercise. Ethanol-administered groups except F group showed a steady decrease in blood glucose level from 30 through 120 min. Heart rate was elevated by ethanol only in the flushed groups. Heart rate in F group was significantly increased at 4 min after ethanol and was maintained at high level until 120 min. In WE and NE groups, heart rate was significantly increased immediately after exercise and returned to the resting level at 60 min. The FE group, however, showed a consistently elevated heart rate throughout the 120-min experimental period. Taken together, the exercise alone produced a delayed ethanol absorption, a prompt increase in heart rate and blood lactate level and a decrease in blood glucose level early in the recovery period from exercise. After ethanol administration, blood lactate was elevated and blood glucose was lowered from 30 to 120 min. Flushed subjects showed rapid increase in heart rate after ethanol drinking and higher blood ethanol level than non-flushed ones from 30 to 120 min after drinking.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.41 no.5
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• pp.57-64
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• 2004

We proposed the eye gaze tracking system under natural head movements, which consists of one narrow-view field CCD camera, two mirrors which of reflective angles are controlled and active infra-red illumination. The mirrors' angles were computed by geometric and linear algebra calculations to put the pupil images on the optical axis of the camera. Our system allowed the subjects head to move 90cm horizontally and 60cm vertically, and the spatial resolutions were about 6$^{\circ}$ and 7$^{\circ}$, respectively. The frame rate for estimating gaze points was 10～15 frames/sec. As gaze mapping function, we used the hierarchical generalized regression neural networks (H-GRNN) based on the two-pass GRNN. The gaze accuracy showed 94% by H-GRNN improved 9% more than 85% of GRNN even though the head or face was a little rotated. Our system does not have a high spatial gaze resolution, but it allows natural head movements, robust and accurate gaze tracking. In addition there is no need to re-calibrate the system when subjects are changed.