• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년 학술대회 논문집 정보 및 제어부문
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• pp.545-547
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• 2006

This paper propose a localization method using color landmark that is applicable to mobile intelligent robot. The color landmarks are attached in the indoor ceiling. The world coordinate of robot is estimated by color patterns and the coordinates of landmarks. A landmark is composed of 4color and these 4 colors are sorted in a line. All of landmarks have a main color which indicates direction of robot. Other 3 colors are the combination of 5 kind of colors. The CCD camera is installed on the top of robot to observe the landmarks in the ceiling.

• 전자공학회논문지B
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• 제30B권5호
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• pp.103-108
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• 1993

An image can be largely corrupted by the ambient illuminant, so that the image enhancement to restory natural color without respect to the ambient illuminant is needed. It this paper, a new color image enhancement technique based on color constancy is proposed. To enhance the image quality, higher volues of contrast and saturation are preferred, but their excessive values make an image unnatural. Since the color constancy processing preserves only hue, while reducing the dynamic range of lightness and saturation,the technique is needed in order to compensate this phenomenon. The proposed method transforms and increases lightness and saturation simultaneously to avoid the complexity in the related transformation by analyzing the relationship between the RGB and modified IHS coordinate system.

• International Journal of Internet, Broadcasting and Communication
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• 제7권2호
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• pp.9-15
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• 2015

Various studies with regard to increasing the optical efficiency of plasmonic color filters have previously been conducted, such as mixing materials or applying diverse pattern shapes. Fundamentally, it is important to maximize the photonic crystal effect by finding the optimum periods of lattice as well as calculating the most efficient transmission area. In this study, we propose a technical method for optimizing the plasmonic color filters that have a high color gamut and luminance by analyzing the light spectrums based on the 1931 color coordinate system. Moreover, we suggest a calculation method in order to define the individual color purity of red and green and blue filters. Consequently, efficiency values are obtained independently from each color filter by evaluating the color purity and the luminance. The final result obtained from simulation are 27.6% of relative luminance and 25.3% of color gamut. The proposed optimization method is applicable to all plasmonic color filters having photonic crystal arrays.

• 한국전자통신학회논문지
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• 제11권7호
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• pp.723-728
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• 2016

본 연구에서는 Landsat-7 ETM+, Landsat-8 OLI 영상과 COMS/GOCI 영상을 이용하여 적조 픽셀의 광학적 특성을 분석하였다. 적조 픽셀을 샘플링하기 위해 Landsat-7, 8 True Color 영상을 활용하였으며, 영상에서 적조 픽셀의 좌표를 획득하였다. 획득된 픽셀의 좌표를 참조하여 동일 해역의 GOCI 영상을 통해 해당픽셀의 흡광 및 수출광량 자료를 획득하였다. 적조가 발생하지 않은 경우 412nm와 660nm 파장대에서 주흡광을 보인 것에 비해 적조 픽셀의 경우 660nm에서 주흡광을 보였으며, 412nm에서는 흡광량이 현저히 줄어든 것을 확인하였다. 수출광량의 경우 스펙트럼 형태에서는 큰 차이가 없었으나, 수출광량의 절대값이 적조 픽셀의 경우 낮게 나타났으며, 특히 660nm와 680nm 파장대에서 수출광량 감소가 크게 나타났다.

• 한국의류학회지
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• 제42권1호
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• pp.121-132
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• 2018

Recent beauty trends focus on suitability to individual features. A personal color system is a recent aesthetic concept that influences color make up and coordination. However, a personal color concept has several weaknesses. For example, type classification is qualitative and not quantitative because its measuring system is a sensory test with no industry standard of personal color system. A quantitative personal color type classification model is the purpose of this study, which can be a solution to above problems. This model is a kind of mapping system in a 3D Cartesian coordinate system which has own axes, Value, Saturation, and Yellowness. The cheek color of the individual sample is also independent variable and personal color type is a dependent variable. In order to construct the model, this study conducted a colorimetric survey on a 993 sampling frequency of Korean women in their 20s and 30s. The significance of this study is as follows. First, through this study, personal color system is established on quantitative color space; in addition, the model has flexibility and scalability because it consisted of independent axis that allows for the inclusion of any other critical variable in the form of variable axis.

• 한국안광학회지
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• 제10권1호
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• pp.1-8
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• 2005

색각 이상자의 색지각은 색 이미지의 색 공간 변환을 사용하여 가능하다. 적록 색각이상자에게, G채널를 극대화(+100)한 경우, G채널를 최소화(-100)한 경우, R채널만 극대화(+100)한 경우, R 채널을 CIE $L^*a^*b^*$ 색 공간에서 $b^*$ 좌표의 (-)값인 황색(Y) 채널로 변환 시킨 경우, B채녈(청)과 G채널(록)로 만 분리하고 다시 명암차로 나타낸 경우, RGB 채널 변환 및 채도를 분리시킨 후 명암만으로 이미지를 얻는 경우 등에 의해 색지각이 가능하다.

• 조명전기설비학회논문지
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• 제28권3호
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• pp.1-6
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• 2014

We measured color rendering index(CRI) of a LED lamp for lighting for aging-time. We chose bulb type white LED lamp six samples and halogen lamp one sample and applied 220V, 60Hz to all the samples for 1,000hours at ordinary temperature. The CRI was measured every 20hours and the CRI change of the LED lamp was compared with the halogen lamp's CRI change. As time goes, efficiency of the halogen lamp decreased and the CRI maintained uniformly. The other hand, efficiency of the LED lamp decreased but the CRI increased. The CRI of the LED lamp has been stabilized since 600hours. The CRI change of the LED lamp was analyzed with a spectrum, color coordinate and color temperature.

• 한국전기전자재료학회논문지
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• 제21권10호
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• pp.911-915
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• 2008

EL (electro-luminescent) device as a light source has an advantage in embodying large area with great flexibility. On nickel foil as an electrode and backplane, we demonstrated a white EL flexible light source with blue phosphor layer combined with color change layer. A correlation between color change layer and color coordination was analyzed by Gaussian method, and then the color coordinate was controlled near to (0.33, 0.33) of pure white light.

• 대한가정학회지
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• 제31권1호
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• pp.193-210
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• 1993

The purpose of this study was to investigate the effect of age, physical type and job on preference for color and fabric motifs in men's clothing design. Color preference measures consisted of clothing styles painted in CAD. Preference for fabric motifs was assesed by stripe fabrics in size, width and strength. All of the preference measures were devised specifically for this study. Furthermore, items on Hight and Weight for physical type, age and job of subjects were included I the questionnaire. Data were obtained by self-administered questionnaires form 243 men (25-54 years old) in Seoul. Analysis was by chi-square (X2), frequency, and percentage. The results obtained in this study were as follows : 1. Color preference was not affected by age and physical type, Job was related to coordinate color of men's clothing. 2. Preference for width of striped motifs was affected by age and job. 3. Preference for strength of fabric motifs in men's jacket was affected by physical type.

• 한국실내디자인학회논문집
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• 제9호
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• pp.49-56
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• 1996

This study is to present the design methods in the Schrider House executed by the Dutch architect G. Th, Rieveld. The plastic principles which underlies the architecture design are examined through the analysis of the 'new structural joint system (Cartesian Coordinate System) ' and ' Color-Plasticity ' which characterized a series of his furniture design from 1918 to 1924. It indicates that Reitveld attempted to realize the simplicity, clarity and flexibility of spatial expression in his first independent architecture by the application of technical skills which have been developed in his early days.