• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권1호
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• pp.570-595
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• 2017

Robust and perceptually-adaptive image watermarking algorithms have mainly targeted gray-scale images either at the modeling or embedding levels despite the widespread availability of color images. Only few of the existing algorithms are specifically designed for color images where color correlation and perception are constructively exploited. In this paper, a new perceptual and high-capacity color image watermarking solution is proposed based on the extension of Tsui et al. algorithm. The $CIEL^*a^*b^*$ space and the spatio-chromatic Fourier transform (SCFT) are combined along with a perceptual model to hide watermarks in color images where the embedding process reconciles between the conflicting requirements of digital watermarking. The perceptual model, based on an emerging color image model, exploits the non-uniform just-noticeable color difference (NUJNCD) thresholds of the $CIEL^*a^*b^*$ space. Also, spread-spectrum techniques and semi-random low-density parity check codes (SR-LDPC) are used to boost the watermark robustness and capacity. Unlike, existing color-based models, the data hiding capacity of our scheme relies on a game-theoretic model where upper bounds for watermark embedding are derived. Finally, the proposed watermarking solution outperforms existing color-based watermarking schemes in terms of robustness to standard image/color attacks, hiding capacity and imperceptibility.

• 디자인학연구
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• 제12권1호
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• pp.75-82
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• 1999

색채배색을 활용하는데 있어서 효율성을 높이기 위해서는 각 배색마다 색채이미지언어를 부여하는 것이 매우 긴요하고 중요한 작업이다. 이를 위해 본 연구에서는 색채배색에 관련된 한국인의 색채이미지언어를 선정하기 위해 문헌연구와 조사연구를 병행하였으며 관련 전문가의 검증을 거쳐 주관적인 색채이미지언어를 객관화시키려 노력하였다. 연구결과 14개의 영역(A힘 또는 역동성, B.어울림, C.질서, D.양식과 유행, E.신비스러움, F.실용성, G.품격, H.호화로움, I.시각, 촉각, 미각, 청각, J.복합성, K.성과 성장, L.일반성, M.정적 또는 서정성, N.단순성)으로 분류하여 사용자들의 유용성을 높이려 하였다. 색채계획시 사용자들의 편의를 도모하기 위해서는 선정된 색채이미지언어와 부합되는 색채배색을 정리하여 제시하는 작업이 필요하나 이는 후속연구로 미루기로 한다.

• 한국주거학회논문집
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• 제26권3호
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• pp.77-84
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• 2015

The purpose of this study is to analyze the aesthetic factors in color combinations of house exteriors in hillside villages, Busan. The so-called 'Hillside renaissance' is a representative urban regeneration project in Busan. The towns in hillside area in Busan have developed colorful sceneries. But all the colorful sceneries are not the same. Each town has own color characters and different aesthetic color effects. This study is to determine the unique aesthetic components in color combination of Gamcheon and Daecheong. This study is based on the traditional color harmony theories. The analysis focuses, inter alia, on Moon-Spencer's 'Aesthetic Measure'. A house exterior color has relations with two neighboring colors in array. And those three colors with next two houses have again each three hue, value and chroma relations. This analysis is first to determine whether each sample color combination is harmonized, and if harmonized, next step to list which aesthetic factor is dominantly contributing to color harmony. And at last, to study the subcategorized sectors of each color components of the hue, value and chroma.

• 한국통신학회논문지
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• 제21권6호
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• pp.1398-1415
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• 1996

Instead of using three charge-coupled devices (CCDs) for the corresponding color channels, most consumer's most consummer's color macmorders reconstruct color images by using only one CCD with a color filter array (CFA), which periodically samples different color signals. By this reson the resulting image cannot produce the full resolution of the input image. More sepecifically, a single-CCD color camcorder reconstructs red, greed, and blue color channels from a color filter array followed by a CCD. During the reconstruction process, color cross-talk among channels (interchannel distortion) and eriodically space-verying blur (intrachannel distortion) occur. The proposed restoration system reduces distortions due to interchannel interference, and then restores each color channel by removing the corresponding intrachannel distortion. Experimental results show that the proposedsystem provides the improved image in oth objective and subjective senses. A major advantage of the proposed system is feasible to real-time image improvement because it can be implemented by a finite impulse response (FIR) filter structure.

• 복식
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• 제56권6호
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• pp.16-32
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• 2006

Perceived meaning of color uniquely forms and is being highlighted as an element of creative design in the modern design industry as well as traditional culture. It is necessary to compare the perceived meanings of color and clothing color of Korea and Japan in order to find out the model of Korea's original color. The purpose of this study Is to draw the results of examining the perceived meanings of color revealed in the culture, arts and clothing color of the both countries and comparing them depending on contemporary times. The scope of study is limited from the ancient times to modern times (about BC.IC-early20C). In the methodologies, the literature and the empirical study focus on both counturies' literature, including art history, ethnology, and the history of clothing; and their paintings and relics, which are all related to clothes. The perceived meaning of color of Korea was prominent with the beauty of nature and gorgeousness throughout the history. The colors were mostly white colors, light colors, and single colors such as obangsaek, which are high pure degree colors by which color is changed depending on darkness and lightness, while that of Japan featured clothing colors combining various colors and middle colors.

• 한국생활과학회지
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• 제16권5호
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• pp.987-996
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• 2007

The purpose of this study is to find out the effect of three clothing cues(jacket color, skirt color, and tone of Korean dress) on the image of Korean dress wearer using tone-in-tone coloration. The experimental materials developed for this study are a set of stimuli and response scales. The stimuli are 16 color pictures manipulated with three clothing cues by drawing. The 7-point scale designed for visual evaluation of female impression formation includes 24 bipolar adjectives. The subjects were 192 undergraduate female students in Chinju city. The results of this study are as follow: As analyzing the image of female figure by the jacket color, skirt color, and tone, three factors including youth activity, attractiveness, and visibility were identified. Among these factors, youth activity and attractiveness were proved to be more important. Each dimensional image was affected by color coordination of jacket color, skirt color and tone of korean dress. Therefore, the image of Korean dress wearer could be varied by color coordination of jacket color, skirt color and tone of Korean dress.

• 한국인쇄학회지
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• 제28권2호
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• pp.117-128
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• 2010

Advancements in digital image have put high quality digital camera into the hands of many image professionals and consumers alike. High quality digital camera images consist originally of raw which have a set of color rendering operation applied to them to produce good images. With color rendering, the raw file was converted to Adobe RGB and sRGB color space. Also color rendering can incorporate factor such as white balance, contrast, saturation. Therefore, in this paper we conduct a study on production of optimum profile considered color rendering in digital camera. To do the experiment, the images were Digital ColorChecker SG target and ColorChecker DC target. A profiling tool was ProfileMaker 5.03. The results were analyzed by comparing in color gamut of $CIEL^*a^*b^*$ color space and calculating ${\Delta}E^*_{ab}$. Also results were analyzed in terms of different $CIEL^*a^*b^*$ color space quadrants based on lightness, chroma.

• 복식문화연구
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• 제20권1호
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• pp.62-71
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• 2012

The purpose of this research is to analyze the characteristics of the color combination in Eco fashion design. 532 pictures related to eco was collected through Eco brand web sites from 2008 through 2011. The characteristics for analysis include color combination and tone. The method of research is content and statistical analysis. The result of the research is summed up below. First, achromatic color was most frequently presented in Eco fashion. Also monotone color or single color combination were displayed often. Secondly, many dresses were of single color combination and T-shirt items displayed contrast color combination created by luminosity difference. Third, the outcome of comparing seasons was that both seasons presented single color and contrast color combination. The difference between countries proved slight as single color coloration dominated. This considered the process which was non-chemical manufacture for eco-friendly. For the combination of colors, the same coloration with single colors or contrast coloration due to the differences of brightness were presented quite often, generally, the modern image fashion without fancy factors have shown a lot. These results that minimalism trend was included in eco-friendly image.

• Journal of Electrical Engineering and Technology
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• 제13권4호
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• pp.1673-1681
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• 2018

In this paper, the fabrication of a white light-emitting diode (WLED) package capable of producing different color rendering indexes (CRI ($R_a$)) using different types of phosphors (YAG:Ce, Silicate, Nitride, LuAG) for the LEDs is presented. The color quality is evaluated based on the current and temperature variation conditions. The evaluation method for color quality compares the existing CIE 13.3 method and the new IES TM-30-15 method. The CRI ($R_a$) defined in the conventional CIE 13.3 has the disadvantage. This cannot offer any information relevant to the user's preference. However, the newly proposed IES TM-30-15 method suggests the additional measure related to user's preference such as Color Gamut ($R_g$). The present experimental results obtained using the IES TM-30-15 show that the color quality of the WLEDs using green and red phosphors are better than that of the WLEDs using yellow phosphor, but their luminous efficacies are lower. The color quality of WLEDs using green and red phosphors are more stable than that of the WLEDs using yellow phosphor, for current and temperature variations, and it is verified that the phosphor causes this change. The evaluation method for color quality, based on IES TM-30-15, is proved to be capable of overcoming the problems of the existing evaluation methods by this study.

• 한국정보처리학회논문지
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• 제5권3호
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• pp.715-719
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• 1998

본 논문에서는 TV에 있어서 위상 정보를 이용하여 특정색을 조정할 경우 색신호의 천이 시간에서 발생하는 검출 오류들과 색신호의 안정화를 위한 색향상 시스템을 제안하였다. 제안한 색향상 시스템은 시간차 보정 방법을 적용하여 색신호와 색부 반송 신호의 전송 과정에서 발생하는 시간차를 보정하여 색신호 검출 오류를 줄였다. 또한 변화하는 색신호의 위상을 검출함에 있어서 실제적으로 존재하는 천이 시간에 따른 검출 오류를 개선하고자 수평 동기 시간내에서 검출 전압값의 평균 차성분을 구하여 이웃한 색신호의 최소 구별 전압값보다 큰값을 가질 때 설정 기준색을 조정하도록 하는 안정화 방법을 제안하였다. 제안한 개선된 색향상 시스템은 기타의 색신호로부터 보정 범위가 중복되지 않고 특정색의 검출 및 조정이 개선되었다.