• 대한전자공학회논문지SP
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• 제46권2호
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• pp.89-98
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• 2009

컴퓨터 비전 분야에서 영상 모자이킹 (Image Mosaicking)은 제한된 시야각의 카메라를 사용하여 획득한 여러 장의 중첩된 영역을 가지는 영상을 한 장의 영상으로 정합하여 나타내는 기법이다. 최근에는 연속된 영상에서 카메라의 기학학적인 움직임 때문에 발생하는 영상의 왜곡이나 밝기 차에 관계없이 정확한 정합을 수행하기 위해서 특징점을 기반으로 서술자를 구성하는 정합 방법이 많이 연구되고 있다. 그러나 대부분의 특징점 검출 알고리즘들은 영상의 밝기값 기반의 처리 과정을 수행하기 때문에 영상의 칼라 성분은 다르지만 밝기값이 비슷한 경우, 또는 동영상에서 시간의 흐름에 따라 광원이 변화하는 경우에는 광원의 영향에 따라 검출되는 특징점의 수와 각각의 지역 서술자의 특성이 변하여 정확한 대응점을 검출하는데 오류를 유발하게 된다. 이런 문제점을 해결하기 위해서 본 논문은 영상의 칼라 정보를 이용한 특징점 기반의 영상 모자이킹 방법을 제안하였다. 디지털 칼라 카메라로부터 획득한 디지털 값을 좁은 대역을 갖는 가상의 카메라 출력값으로 변환하여 물체의 분광 반사율 기반의 값으로 유도하고 이것을 광원의 변화에 불변하는 칼라 불변 값 (Color-Invariant Value)으로 정의하였다. 제안된 칼라 불변값의 유효성을 검증하기 위해서 시뮬레이션된 광원들과 Macbeth Color-Checker를 이용하여 확인하였으며, 실험결과에서 제안한 방법과 기존의 SIFT 알고리즘을 비교를 통해 제안된 방법의 정합율의 향상을 확인하였다.

• 한국통신학회논문지
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• 제31권3C
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• pp.264-270
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• 2006

In this paper, we propose the modified display color control system using white point line, boundary lines and S-shaped curves to emphasize blue and red tone colors on CIE1931 diagram. The proposed system divides RGB gamut into movable area and non-movable area by using boundary lines. The colors in movable area are moved into right side or left side along quadratic curve to change the bluish (or reddish) color to more bluish (or more reddish), while those in non-movable area are excepted from color control to prevent skin color from changing. The loci of the quadratic curves are very similar to the arc of the white-point line which connects all points that represent the chromaticities of a black body radiator at different temperatures and is also called the black body locus. The RGB gamut extension by movement of chromaticity coordinate can improve color reproducibility. Therefore in the case of application to LCD, the display shows excellent performance because the LCD's color reproducibility is comparatively lower than that of other display systems. The proposed system is also experimentally demonstrated with Xilinx Virtex FPGA XCV2000E- 6BG560 and the TV set.

• 패션비즈니스
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• 제9권2호
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• pp.20-27
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• 2005

To find suitable color for an individual is very important in personal image-making. In recent years, the importance and role of personal image is also more emphasized. This study deals with the necessity d personal color system and the proposal of color which looks nice on a person as a result d personal color system. It also includes the method of making personal image by balancing between and using both favorite color and unfavorite color. Besides, I study how does the color image affect the personal appearance image in this paper. From clinical experiments, I concluded as follow. First, Each person has his suitable color. When the color is used, the color, pimples, flows and so on are covered and defects of his face are made up for. Second, By changing the factors of his own original color-group and decision factors - color d skin, hair, eye, etc -, I can change personal color-group. Third, The image of color affects the personal appearance image, when it used in make-up and hair-color. Considering above results, If one uses one's suitable color, one will complement defects done's face and improve merits of one's. Besides, One will be more confident and active by using one's suitable color.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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• pp.1327-1330
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• 2005

The color shifting from yellow to green of electroluminescent emission from ZnS: Cu alternating current thick film electroluminescent (ACTFEL) devices has been achieved by changing the Mg composition in the phosphor layers. The commission international de l'Eclairge (CIE) color co-ordinates of the ACTFEL devices prepared from these phosphor layers show a shifting from yellow (x=0.45, y=0.52) towards green (x=0.36, y=0.58). The various parameters influencing the emission intensity were also investigated.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제17권2호
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• pp.45-52
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• 2011

The visual sensory information in physical environments can induce or reduce occupants' stress. In healthcare settings, positive environmental stimulations can promote patient well-being by reducing their stress: poor health environments work against a patient's health. Changing the color in a patient room is an inexpensive process and thus finding better colors for healthcare settings is a cost effective method of improving healing environments. Color may have important implications for pediatric patients, but the investigation of Korean populations has been non-existent. The purpose of this study was to investigate Korean pediatric patients' color preferences for patient room design. The color preferences from 50 Korean pediatric patients were recorded and investigated for gender effects. A simulation method was used because of its reliability and feasibility, allowing for investigating the value of color in real contexts and controlling confounding variables. The overall color preferences from Korean pediatric patients showed that they preferred blue the most and white the least. Gender differences were found in red and purple. Girls preferred red and purple more than boys. The results from this study can help healthcare providers and designers better understand appropriate colors for Korean pediatric patient populations.

• 한국생활과학회지
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• 제11권4호
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• pp.391-400
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• 2002

This study was intended to research the dyeing with natural walnut hull extracts over cotton, flax, rayon, wool, nylon and silk. We studied the dyeing conditions and mordant effect, and observed dyeability. The result are as follows: 1. In the dyeability with natural walnut hull extracts, protein and polyamide fiber has more dye uptake rather than cellulose fiber. 2. The optimum condition in the dyeing with natural walnut hull extracts was at $90^{\circ}C$, 12%(o.w.b) concentration in 90 mins. 3. In the case of the dyeability by repeated dyeing number, the dyeability of good dyeability fiber is improved in the first or second dyeing, but that of bad dyebality fiber is improved when it is dyed more repeatedly. 4. In the dyeablity treated with mordants, Al, Sn, and Mg don't have any differences, but Cu and Fe have some difference. The color of Fe mordant is green and the color of Cu mordant is blue. 5. In the case of the color fastness with mordant treatment, nylon is better than silk and wool in color fastness to washing but silk is better than nylon and wool in color fastness to light.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제6권12호
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• pp.3182-3196
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• 2012

In this paper, we present a new LED (Light Emitting Diode) mood lighting system interacting with smartphones based on the generation of different light sequences. In the proposed system, one light sequence is considered to be one unit of the service contents, which is then transmitted through a network and played in an LED lighting system. To this end, we propose a novel generation scheme using a smartphone, and a decoding/playing mechanism in an LED lighting system. The lighting sequences have a fixed period divided into predefined time units. Two modes - basic and interpolation - are supported in each time unit when playing a color sequence. In the basic mode, the color is maintained for the entire time unit, whereas in the interpolation mode the color is interpolated. The sequence is decoded and played in the lighting circuit by changing the duty cycle of a PWM (Pulse Width Modulation) signal. A demonstration system of the overall proposed method was using smartphones, a server and an LED lighting system. The results from this experiment show the validity and applicability of the proposed scheme.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 1990년도 추계학술발표회논문집
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• pp.17-22
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• 1990

A computer program to calculate the color temperature (To) and color rendering index (Ra) of the light source was developed. Using this program and a measuring system with a monochromator and a integrating sphere, To and Ra of incandescent lamp and fluorescent lamp was calculated. As a result, it is known that To of the I/L and the F/L with a reactor ballast is changing about 40˚K with varying source voltage of 5 V. Ra variations of these lamps have a trend but can be disregarded.

• 패션비즈니스
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• 제18권4호
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• pp.114-124
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• 2014

This research was carried out to find the mordant effects by Tara and Myrobalan as natural tannins on the cow leather dyed with Lac powder. The cow leathers were treated with Tara, Myrobalan, Al, Cu, and Fe mordants by changing treatment orders. It was examined for K/S value, surface color changes, and color difference. The K/S value generally has higher Myrobalan than Tara, and pre-mordant than post-mordanted condition. Cu is the strongest among the three mordants. As a results of the treatment order, the K/S value is higer in pre-tannin-mordant agent than in pre-mordant agent-tannin. In the post mordant, K/S value is higher in mordant agent-tannin than in tannin-mordant agent. The color difference and color factors such as H, V and C were various according to the mordant agents, treatment orders and mordant methods; and surface colors of dyed cow leathers were R and RP. It was difficult to find some significant means of mordant orders.

• 한국광학회지
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• 제10권5호
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• pp.379-385
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• 1999

칼라 CRT(cathode ray tube) 모니터의 화면밝기와 명암대비 레벨에 따른 화질 특성을 연구하였다. 화면밝기와 명암대비 레벨을 변화시키면서 SQRI(square root integrals)를 측정하여 시감효과를 고려한 분해능을 조사하였다. 또한 이들 레벨에서 삼색 채녈의 색도 좌표와 휘도를 측정하여 채널의 색도 좌표 일정, 색재현 영역, 그리고 채널의 독립을 만족하는 흰색의 최대 휘도를 분석하였다. 결과를 바탕으로 최적의 분해능과 색재현 특성을 가지는 화면 밝기와 명암대비 레벨을 제시하였다.