• 한국안광학회지
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• 제8권1호
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• pp.23-28
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• 2003

랩온어칩을 위한 변환 가능한 RGB 색상 필터를 연구하였다. 잉크 색상 필터는 PDMS 패턴과정에 의한 공정으로 제작하였고, 칼라 필터의 자외선-가시광선 영역의 광투과율을 조사하였다. 잉크 칼라 필터는 스펙트럼의 모양과 기울기에 의해 특성 지워진다. 적색/황색 필터의 투과는 600 nm와 500 nm에서 차단스펙트럼 모양을 가지는 곡선으로 구성되었다. 잉크 필터의 청색 출력은 80% 피크 투과율과 약한 적색 누수를 보였다. 한편 녹색 잉크 필터는 48% 피크 투과율과 적색 누수 투과를 보였다.

• 전기학회논문지
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• 제60권5호
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• pp.1049-1054
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• 2011

Color is discerned due to the reflectance of object and its hue is determined by the Ratio of RGB spectrum. The aim of this study is to evaluate the Color information using by the optical system in terms of convenience and simplicity. Firstly, the differential Ratio of RGB is evaluated by photodiode Sensor which achieves a high efficiency with quick tranducer output. To extract the information of RGB Ratio, light emitting diode is built in Color sensing system with photodiode. Our proposed method is very economical, simple, and convenient. Our results can be applied to confirm the accurate information of Color in the research environments and commercial purposes. Thus RGB information can be determined subjectively and thus, the inherent characteristic of Color will be revealed precisely and its related features can be resolved in a real time mode.

• 대한임베디드공학회논문지
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• 제8권4호
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• pp.227-233
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• 2013

In this paper, we propose an implementation of pH reader on Android smart phone by using Eclipse and SDK. After taking a picture of pH spectrum and tested litmus paper at the same time, we save the picture. From the picture, reference values in RGB and YUB of all pH color in the spectrum are obtained and then those of a chosen point by user in the litmus paper are to be compared with. The distances between the reference colors and the litmus paper's color are measured by Euclidean distance in RGB or YUB coordinate. The nearest two pH values are taken to find the weighted average of the result. Series of test show the proposed scheme is feasible and has performance within 10% error.

• ETRI Journal
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• 제35권6호
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• pp.969-979
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• 2013

Various simulation applications for hair, clothing, and makeup of a 3D avatar can provide more useful information to users before they select a hairstyle, clothes, or cosmetics. To enhance their reality, the shapes, textures, and colors of the avatars should be similar to those found in the real world. For a more realistic 3D avatar color reproduction, this paper proposes a spectrum-based color reproduction algorithm and color management process with respect to the implementation of the algorithm. First, a makeup color reproduction model is estimated by analyzing the measured spectral reflectance of the skin samples before and after applying the makeup. To implement the model for a makeup simulation system, the color management process controls all color information of the 3D facial avatar during the 3D scanning, modeling, and rendering stages. During 3D scanning with a multi-camera system, spectrum-based camera calibration and characterization are performed to estimate the spectrum data. During the virtual makeup process, the spectrum data of the 3D facial avatar is modified based on the makeup color reproduction model. Finally, during 3D rendering, the estimated spectrum is converted into RGB data through gamut mapping and display characterization.

• 대한의용생체공학회:의공학회지
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• 제30권3호
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• pp.263-269
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• 2009

An object's color and intensity are determined by its spectral reflectance and illumination. Therefore, the illumination plays a key role in forming the appearance of the object in a scene. In this paper, we focus on color distinction of objects and derive the optimal illumination conditions to maximize the distance between objects in the RGB color space. As a practical approach the optimal illumination is composed by deriving the optimal linear combinations given a set of LED light sources. The effectiveness of our approach is shown through experimental results using an endoscope system.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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• pp.1587-1590
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• 2006

Through the engineering of recombination region and energy transfer in organic light emitting device, blue and red light emitting device with good color stability has been successfully obtained. A Color control layer (CCL), which emits green light through the energy transfer from the emission layers, has been introduced into the blue and red light emitting device for RGB white OLED. The RGB white OLED showed the current efficiency of 13 cd/A and the CIE coordinates of (0.33, 0.38) at $1000\;cd/m^2$. The device exhibited very stable spectrum with respect to operating current density and the CIE coordinates varied from (0.34, 0.38) to (0.31, 0.37) for $100-22000\;cd/m^2$.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2006년도 하계학술대회 논문집 Vol.7
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• pp.414-415
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• 2006

At present, Characteristic of high color reproduction for LCD products needed in Display market. Therefore, The improving methods of high color reproduction are alteration of color Filter or Red, Green, Blue phosphor alteration of CCFL. But High color reproduction phosphor is short life time as compared with conventional phosphor. In this experiment, by using split the Red, Green, Blue CCFL with high color reproduction phosphor instead of conventional high color reproduction CCFL. We knew that the high color reproduction RGB split CCFL BLU has same spectrum data and chromaticity, but has long life time as manufacturing RGB split CCFL and reduce chromaticity shift following long time discharge as compared with conventional high color reproduction CCFL.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2008년도 학술대회 1부
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• pp.717-721
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• 2008

본 논문에서는 RGB 카메라와 LED 광원만을 이용하여 객체에 대한 반사 스펙트럼을 효율적으로 측정하는 영상 획득 시스템을 제안한다. 멀티스펙트럼 영상 획득 시스템은 LED 컨트롤러, LED 클러스터, RGB 카메라로 구성되고 전역 스펙트럼(full spectrum)의 영상을 실시간으로 획득하는 시스템이다. 제안된 시스템은 스펙트럼 기저 함수들의 선형 결함으로 전역 스펙트럼을 재구성하여 비교적 간단하면서도 높은 정확도를 보장해준다. 본 시스템의 효용성을 증명하기 위해 다양한 장면(scene)에 대한 반사 스펙트럼을 측정하고 이를 이용하여 여러 광원을 적용한 재조명 결과를 보여준다.

• 한국음향학회지
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• 제29권2호
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• pp.111-117
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• 2010

본 연구에서는 액체 내에서 초음파에 의해 빛이 발생하는 현상인 Sono-Luminescence (이하 SL)에 대해 연구하였다. 알칼리 금속과 알칼리 토금속 화합물을 녹인 용액에서의 SL을 관찰 하였으며, 금속 이온 농도, 금속이온의 종류를 바꾸어 가며 SL에 미치는 영향을 조사하였다. 이 때 각각의 SL에서 나오는 빛을 사진으로 찍어 RGB 성분 분석을 통해 금속 이온을 녹인 용액의 SL이 증류수에서 SL과 금속 불꽃 반응 색 또는 선스펙트럼에서 강한 세기로 방출되는 색의 합성으로 표현될 수 있는지 연구하였다. 알칼리 금속의 경우 두 색의 합성으로 잘 표현되었으나 알칼리 토금속의 경우는 그렇지 않았다. 그 이유로 SL 방출시 온도가 그리 높지 않아서 알칼리 토금속의 선스펙트럼에서 에너지가 큰 단파장의 빛이 SL에서 잘 방출되지 않기 때문인 것으로 추론하였다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2002년도 International Meeting on Information Display
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• pp.999-1004
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• 2002

This paper presents the color displays using more than three primary colors, for the reproduction of wider color gamut, and high-fidelity color reproduction. First, Natural Vision system, which is currently under development for the natural color reproduction in visual telecommunication applications, is introduced, The natural vision is based on spectrum instead of trichromatic color space, and enables high-fidelity color reproduction using multispectral and multiprimary technologies. Then, sixprimary color projection displays using LCD and DLP, and a four-primary color flat panel display are shown. It is experimentally demonstrated that the color gamut becomes much larger than conventional RGB-based display. In addition, it is proved that the spectral color reproduction using multiprimary display suppresses the influence of observer metamerism, and as a result, the color matching between the display and the real object is well improved.