• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2014.06a
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• pp.71-72
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• 2014

최근 들어 드라마나 영화 속 인물 들의 얼굴을 다른 얼굴로 교체하고자 하는 시도들이 주목을 받고 있고, 사용자들의 관심 또한 증가하고 있다. 이러한 연구는 오래 전부터 많이 연구되어 왔으나, 조명 변화에 강인한 피부 톤 변환 문제는 여전히 주요 이슈로 자리하고 있다. 본 논문에서는 히스토그램 명세화 기법을 응용하여 피부 톤을 자연스럽게 변환 시켜줄 수 있는 기법을 제안한다. 두 얼굴 영상의 R, G, B 채널에 대한 히스토그램을 각각 생성하고 이들을 누적분포함수로 각각 변환한다. 변환된 누적분포함수들을 이용하여 두 얼굴 영상의 히스토그램을 근사 시킬 수 있는 변환 표를 생성하고 이를 이용하여 얼굴 영상의 피부 톤을 변환시킨다. 조명 변화로 인해 발생하는 전반사 영역은 선형 보간 법을 사용하여 제거한다. 실험 결과, 제안하는 방법이 조명 변화에 적응적으로 대처하면서 자연스럽게 피부 톤을 변환 시켜줄 수 있음을 확인하였다.

• Science of Emotion and Sensibility
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• v.17 no.1
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• pp.105-114
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• 2014

The skin-tone in portrait photography is one of the most sensitive parts that need retouching by a photographer. To investigate the emotional reactions related to users' preferences for the skin-tone variations in portrait photography, two experiments were conducted. The first experiment included JND(Just Noticeable Difference) test to determine the general distribution of preferences with many photographs that varied in phases up to an extreme one, as a result, preferences for the brightest skin-tone and the red or magenta one were found. Based on the first experiment, we reduced the number of samples by adjusting their brightness to the brightest phase constantly. To intensify the second experiment, we reduced the number of the other colored samples to only one and made samples for five phases from green to magenta, namely the most preferred skin-tone in the first experiment. In the second experiment, the common preference for a neutral skin-tone and the partial difference between the two gender groups were found. In conclusion, the users' preference for a particular skin-tone was positively affected by emotions such as 'happiness' or 'comfortable'. With this investigation, we compiled some statistically meaningful facts to confirm that the preferences of the users depend positively on controlling the skin-tone in portrait photography.

• Journal of the Korean Applied Science and Technology
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• v.37 no.6
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• pp.1773-1778
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• 2020

This study evaluated the skin improvement effect and feeling of use of a temperaturesensitive hydrogel mask pack containing an hyaluronic acid. Ten women in their 30s to 40s who met the selection criteria were tested. The hydrogel mask pack was applied 3 times a week for 4 weeks, and moisture, oil, and skin tone were measured. As a result, skin moisture content increased by 11.3% after one application and 58.36% after 4 weeks of use, showing a very high rate of moisture increase. The oil content increased by 67% after one use, and after that, an appropriate amount of oil was maintained. Did not increase any more. Skin tone increased after 4 weeks. After 4 weeks, evaluation of application feeling and sensory efficacy obtained 87.6% of positive results. As a result of the above, the temperature-sensitive hydrogel mask pack helps to improve the skin and has an excellent feeling of use.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.41 no.3
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• pp.229-235
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• 2015

Skin aging is the phenomena finally expressed on the skin surface and related to the changes in the microstructure of the skin texture. Which is resulted in wrinkle formation and uneven tone of skin and so on. In this study, the synergy effect of Cedrol and a collagen-derived peptide in type III collagen synthesis was evaluated by in vitro test. The physiological skin state of 22 female volunteers was measured after using the cosmetics for 4 weeks. Results showed that Cedrol and a collagen-derived peptide had the excellent synergy effect in type III collagen synthesis. The cosmetics improved skin microrelief, star configurations, skin gloss, skin tone, hydration and elasticity except skin lightening. In conclusion, this study proved that Cedrol and collagen-derived peptide had the synergy effect of type III collagen synthesis in the cell level and cosmetics with those was improved skin aging in human volunteer test.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.6
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• pp.269-276
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• 2017

In this study, a test was conducted to examine the effects of micro-needle therapy (MTS) and cosmetics containing spirulina on improving the skin tone, skin hydration, hyper-pigmentation, and fine lines of middle-aged women in their 40s and 50s and to propose an effective skin care method. The subjects were divided into a control group of eight people who used serum and cream mask that does not contain MTS and spirulina, and an experimental group who used serum and cream containing MTS and spirulina. The test was conducted with six 30-minute sessions for one week. The change in skin was measured over three times in the week of the test, after six weeks of the test, and two weeks after the test had finished. The result showed that after six weeks of the test, in the experimental group, the skin tone (color brightness, saturation brightness, skin brightness) and moisture showed a significant increase (p<0.05), while the number of small hyper-pigmentation and large hyper-pigmentation, as well as the length of crow's feet, melanin, erythema showed a significant reduction (p<0.05). No significant differences in fine lines under the eyes and length of crow's feet were observed. Two weeks after the test was finished, the experimental group showed a significant decrease in the length of crow's feet and melanin (p<0.05), and a significant increase in skin brightness and moisture (p<0.05). Even after the test was completed, the skin brightness, fine lines, melanin, and moisture improved continuously. In conclusion, skin care using MTS and cosmetics containing spirulina was more effective on improving the skin tone, hydration, hyper-pigmentation, and fine lines, than skin care without using them.

• Journal of Convergence for Information Technology
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• v.11 no.3
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• pp.220-228
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• 2021

In this study, 20 middle-aged women aged from 35 to 55 were studied from October 12, 2020 to November 15, 2020 to find out the effects of improvement of facial skin of Jinyeosoo Clean Mist. Among the 20 participants, 10 were divided into experimental group and 10 control group. The Janus facial skin scope system (PSI Co.) used on the skin to measure pore, wrinkles, elasticity, UV pigmentation, and skin tone observed depending the difference in light sources. The facial examination took place 10 minutes after cleansing to stabilize and a total of 4 examinations were carried out after every week of using Jinyeosoo Clean Mist for 4 weeks. For statistical processing, SPSS statistics program 21.0 was utilized to compare the mean averages of pre-experimental and post-experimental data from the above two groups - the experimental group that used Jinyeosoo Clean Mist (hydrogen ion mist) 1 and 2 and the control group that did not use the subject products - and the corresponding sample t-test was used. As a result of the analysis, the group that used Jinyeosoo Clean Mist showed difference in pores (t=3.280, p<.05), wrinkles (t=4.353, p<.01) and elasticity (t=3.003, p<.05), skin tone(t=3.280, p<.01) under the statistical significance level.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.958-961
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• 2014

최근 영상 분석을 기반으로 한 서비스 어플리케이션의 공급량이 증가하는 추세이다. 특히, 피부 영상 분석 서비스의 경우 주목할 만한 이슈는 접근의 용이함과 편리성을 갖춘 서비스 어플리케이션의 개발이다. 본 논문에서는 사용자의 피부 상태 진단 서비스를 손쉽게 웹 상으로 제공받을 수 있는 어플리케이션 개발에 주안점을 둔다. 이를 위해 피부 현미경으로 촬영된 이미지에 이진화 및 질감 대비 향상, 노이즈 제거 등의 전처리 과정과 Watershed 알고리즘, 외곽선 검출 등의 과정을 거쳐 수치화된 데이터를 산출한다. 최종적으로 피부 주름, 거칠기, 유분, 톤, 민감성 정보를 검출하며 분석 결과를 사용자에게 보여준다. 분석된 피부 영상 정보를 통해 사용자는 쉽게 자신의 피부 상태를 진단 받을 수 있을 것으로 사료된다.

• Journal of the Korean Applied Science and Technology
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• v.40 no.6
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• pp.1580-1588
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• 2023

The desire for clear and clean skin is universal among both men and women. Women, in particular, seek the help of foundation to achieve beautiful and transparent skin. The choice of foundation is not determined by the race of an individual; instead, it varies based on personal skin color and undertone. Therefore, there is a need to surpass the stereotype of using foundation colors based on racial discrimination. The purpose of this study is to randomly select cosmetics brands from Korea, China, Japan, the United States, France, and the United Kingdom, considering the impact of each photo, environment, and equipment. The objective is to understand the differences in skin tones in foundation advertisement model images on websites. Analyzing the RGB values of foundation colors for each brand revealed that in Korea, the colors were 8.75R, 1.25YR, 2.5YR, 3.75YR, 5YR, and 6.25YR. Chinese brands showed similar colors with 2.5YR, 3.75YR, 5YR, 6.25YR, and 10YR. Japanese brands displayed colors such as 7.5R, 8.75R, 10R, 5YR, 6.25YR, and 7.5YR. American brands presented colors like 6.25R, 8.75R, 10R, 2.5YR, 3.75YR, 5YR, 6.25YR, 7.5YR, and 10YR. French brands featured 10R, 1.25YR, 3.75YR, 5YR. Lastly, British brands displayed 2.5YR, 3.75YR, 7.5YR. As a follow-up study, in-depth research on the reshaping and color changes of foundation over time is recommended. It is hoped that this research will serve as fundamental data for makeup companies' marketing and contribute to the development of both domestic and international color cosmetics markets.

• Proceedings of the Korean Society of Computer Information Conference
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• 2011.06a
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• pp.311-312
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• 2011

사람은 어느 누구에게나 본인이 좋아하는 색상이 선천적으로 존재하고 후천적으로 혹은 인위적으로도 존재한다. 본 논문에서는 사람이 좋아하고 사람에게 어울리는 색상을 찾는 방법에 대하여 제시한다. 먼저, 피부, 머리카락, 눈동자의 색과 같이 색상의 기본을 이루는 톤(tone)에 대하여 알아보도록 한다. 그리고 색을 봄, 여름, 가을, 겨울의 사계절로 나누어 피부의 색, 머리카락의 색, 눈동자의 색과 자기 자신이 기호하거나 좋아하는 것과 본인의 성격에 따라서 나누어지는 사계절 색채이론을 설명한다. 또한 각 계절별 컬러의 특성도 살펴보도록 한다.

• 한국벤처창업학회:학술대회논문집
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• 2017.04a
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• pp.45-45
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• 2017

본 연구에서는 고압산소치료 후 포유동물의 피부에서 Melanin 세포의 생성이 줄어들었음을 이미 보고된 바 있고, 치료 후 전층 피부이식 생존율을 높였고, 또한 인체의 피부 진피층 확인은 더 많은 임상데이터가 필요하나 고압산소치료 후 표피면의 변화는 빠른 시간에 확인 할 수 있다고 판단됨으로 이에 피부진단기의 기준면과의 평행(parallel polarization) 이미지로 피부표피의 변화를 확인 하고자 했다. 본 연구의 고압산소챔버를 활용한 피부표피에 대한 분석 및 실험 결과, 주름살 및 상처(Wrinkle & Scar) 분석에서 피실험자 남자1 3%, 남자2 2%, 여자1 5.9%, 여자2 2.3%로 피실험자 모두 감소 현상을 보여 피부 탄력도가 좋아 지는 효과를 보였다. 피부미백(S-Gray) 분석에서는 피실험자의 피부 표피면의 멜라닌 및 에리즈마 색소의 피부 톤이 남자1 1.1%, 남자2 2.3%, 여자1 4% 로 피실험자 4명 중 3명은 상승 효과를 얻었으나, 피실험자 다른 1명인 여자2는 2.3% 하향의 결과가 나타났다. 홍도(Erythema) 분석, 피실험자 정상인 부위인 D.BLUE/BLUE 값이 남자1 5.6%, 남자2 4.9%, 여자1 17.3%, 여자2 15.3% 증가 현상을 보였으며 남자와 여자의 효과 차이가 10% 이상으로 나타낸 것으로 보아 남자 보다는 여자가 우세한 것으로 판단되었으며, 비정상인 에리즈마 색소(민감도)의 비정상인 부위인 YELLOW/RED 컬러 값에서 남자1 5.2%, 남자2 5%, 여자1 9.2%, 여자2 4.5% 감소 하였음을 보였다. 이에 피실험자 모두 에리즈마인 민감성 산소치료에 따른 피부에 미치는 영향이 효과가 있는 것으로 판명되었다.