• Proceedings of the Optical Society of Korea Conference
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• 2004.02a
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• pp.160-163
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• 2004

LUTCHI와 새로이 수집된 CII-Kwak 데이터를 이용하여 테스트한 결과 CIECAM02를 비롯해 현재까지 개발된 주된 color appearance model들이 몇 가지 중요한 color appearance 현상들을 설명하지 못한다는 것이 발견되었다. 본 논문에서는 이러한 문제점을 극복하기위해 새로이 개발된 Kwak03 모델이 소개되었다. Kwak03 모델은 CIECAM02에 기초하고 있으나 achromatic signal에서 cone 신호들의 비율, dynamic response 함수 등 많은 면에서 큰 차이를 보인다. LUTCHI 및 CII-Kwak 데이터를 사용한 테스트 결과 Kwak03가 테스트된 모델들 중 특히 dark surround 하에서 휘도 및 배경색의 변화에 따른 색변화 예측에서 가장 우수한 결과를 보였다.

• Journal of the Korean Society of Costume
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• v.27
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• pp.75-86
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• 1996

The objectives of this study were to classify the T-shirts color preferences and to examine how T-shirts color preferences and appearances satisfaction vary according to sex school and extroversion. Questionnaire was comprised of four sections: 8 Likert type items of T-shirts color preference: 10 Likert type items of appearance satisfaction: 10 Likert type items of extroversion : and 2 demographic variables. Samples were 335 high school and college students in Kwangju Korea. The data were analyxed using factor analysis and three-way ANOVA. The results of the study were the followings 1. Three segments of T-shirts color preferences derived from factor analysis :F.1 'warm' F. 2 'dark' F.3 'commonplace' 2. Women in high extroversion group liked red color better than men and low extroversion group 3. There were not significant differences in blue and orange color preference according to sex school and extroversion. 4. Therer was interaction effect between sex and school on dark blue color preference. Women liked dark blue color better than did men. 5. Men liked green color better than did women. 6. Women and college students liked pink color better than did men and high school students. 7. College students liked yellow color better than high school students. 8. Men and middle level extroversion group liked purple color better than did women and high and low extroversion group. 9. Men and high level extroversion group had more appearance satisaction than women and low extroversion.

• Journal of Animal Science and Technology
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• v.63 no.3
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• pp.614-625
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• 2021

This study investigates how visual appearance of pork cuts affects consumer preference. Images of pork belly, Boston butt, and loin were chosen on the basis of visible fattiness and used to analyze consumers' perception of the appearance of each pork cut. Meat color and visible fat proportion of images of pork cuts were analyzed by the researchers before conducting the survey. A total of 211 pork eaters evaluated the pork cuts based on appearance (lightness of color, redness, visible fat proportion, and fat distribution), preferability, and overall acceptability. Also, muscle pieces from different pork cuts were taken and the relative area composition of muscle fibers was measured. Based on survey results, correlation between visual traits and preferences of each pork cut was analyzed. The survey results showed that preferred pork appearance varied as per each individual's favorite pork cut. Also, the respondents evaluated visual characteristics and preference for each pork cut differently possibly due to the different visual characteristics of each cut. Correlation analysis between visual traits and preference indicated that overall acceptability of pork cuts was mainly influenced by fat preference, followed by color preference. Fat and color preferences for each pork cut were affected by various visual attributes including redness, lightness of color, visible fat proportion, and fat distribution, but their effects were considerably varied among different pork cuts. Thus, Korean consumers perceived and assessed pork appearance using various quality cues but the evaluation depended on which cut was being observed.

• Journal of the Korean Graphic Arts Communication Society
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• v.19 no.2
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• pp.58-67
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• 2001

Gamut mapping is a technique that acts on cross-media color reproduction to transform a color between devices for the purpose of enhancing the appearance or preserving the appearance of an image. Gamut mapping essentially produces color conversion error which depends the gamut mapping method, source and destination devices, and sample points for gamut modeling. For color space conversion between monitor colors and printer colors, empirical representation using sample measurements is currently widely utilized. Color samples are uniformly selected in the device space such as CMY or RGB, represented as color patches, and then measured. However, in the case of printer, these color samples are not evenly distributed inside the printer gamut and the color conversion error is increased. Accordingly, this paper introduces a equally distributed color sampling method in CIELAB space, a device- independent color space, to reduce color conversion error, and the performance is analyzed via color space conversion experiments using tetrahedral interpolation.

• Proceedings of the Korean Printing Society Conference
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• 2000.12a
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• pp.0.3-0
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• 2000

Gamut mapping is a technique that acts on cross-media reproduction to transform a color between devices for the purpose of enhancing the appearance or preserving the appearance of an image. Gamut mapping essentially produces color conversion error which depends the gamut mapping method, source and destination devices, and sample points for gamut modeling. For color space conversion between monitor colors and printer colors, empirical representation using sample measurements is currently widely utilized. Color samples are uniformly selected in the device space such as CMY or RGB, represented as color patches, and then measured. However, in the case of printer, these color samples are not evenly distributed inside the printer gamut and the color conversion error is increased. Accordingly, this paper introduces a equally distributed color sampling method in CIELAB space, a device-independent color space, to reduce color conversion error, and the performance is analyzed via color space conversion experiments using tetrahedral interpolation.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.29 no.1
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• pp.1-8
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• 2015

To produce the white light, there are a single chip method using the blue light and phosphor coating, a multi chip method by mixing R, G, B light.. Multi chip method is proper for the smart lighting system by controling color and color temperature. And color rendering of single chip LED is good by even spectral distribution. To apply application technic like smart light system, this paper analyzed the properties of single chip LED and RGB multi chip LED, and implemented the 2 part subject evaluation for single chip LED and RGB multi chip LED. The first part is comparison of properties for single chip LED and RGB multi chip and second part is color appearance evaluation of 8 colors in each lighting environment.

• Journal of Embryo Transfer
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• v.30 no.2
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• pp.99-107
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• 2015

The aim of the present study was to identify coat color associated genes that are differentially expressed in mature Korean brindle cattle (KBC) with different coat colors and in Hanwoo cows. KBC calves, before and after coat color appearance, were included. Total cellular RNA was isolated from the tail hair cells and used for microarray. The number of expressed coat color associated genes/probes was 5813 in mature KBC and Hanwoo cows. Among the expressed coat color associated genes/probes, 167 genes were the coat color associated genes listed in the Gene card database and 125 genes were the pigment and melanocyte genes listed in the Gene ontology_bovine database. There were 23 genes/probes commonly listed in both databases and their expressions were further studied. Out of the 23 genes/probes, MLPH, PMEL, TYR and TYRP1 genes were expressed at least two fold higher (p<0.01) levels in KBC with brindle color than either Hanwoo or KBC with brown color. TYRP1 expression was 22.96 or 19.89 fold higher (p<0.01) in KBC with brindle color than either Hanwoo or KBC with brown color, respectively, which was the biggest fold difference. The hierarchical clustering analysis indicated that MLPH, PMEL, TYR and TYRP1 were the highly expressed genes in mature cattle. There were only a few genes differentially expressed after coat color appearance in KBC calves. Studies on the regulation and mechanism of gene expression of highly expressed genes would be next steps to better understand coat color determination and to improve brindle coat color appearance in KBC.

• Applied Biological Chemistry
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• v.22 no.1
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• pp.18-23
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• 1979

To prepare the objective quality control index of red pepper powder, the relationships among the color appearance, capsanthin red pigment and the contamination of coliform bacteria were studied and summarized as followings; 1. Visual method by human eyes was inadequate to grade the quality of red pepper powder, because of the different personal color evaluation. 2. Grading upon capsanthin contents are well agreed with the color appearance of the red pepper powder. Therefore, color appearance can be correlated with the capsanthin content. 3. Color appearance of the red pepper can be numerically expressed with Hunter-value a/b; Capsanthin $content(mg/g-red pepper)=0.257{\times}10^{0.703}(a/b)$ and it can be used as an index of the quality control of red pepper powder. 4. There was no distinct correlation between the comtamination of coliform bacteria and the color value.

• Journal of the Korean Society of Clothing and Textiles
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• v.27 no.1
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• pp.111-122
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• 2003

The purpose of this study is to investigate the effect of clothing coloring and type of pants/skirt as clothing cues on impression of college female students. The experimental materials developed for this study are a set of stimuli and response scales. Thirty two color pictures of various combinations of colors for shirt, and colors and type of pants/skirt were manipulated on computer drawing. For visual evaluation of women's casual wears about colors and type, 7-point scales were designed. The subjects consist of 192 female and male undergraduate students in Chinju city. The results of this study can be summaried as follow: As analyzing the impression of female figure by the color of shirt and the color and type of pants/skirt, five factors including appearance valuation, concentration of attention, clearness, stability, and activity were found to be important. Color of shirt have significant effects on appearance valuation, concentration of attention, clearness, stability, and activity. Color of pants and shirt also have significant effects on all five factors. Especially, they strongest predictors for stability and activity. Type of pants/skirt significantly effects on concentration of attention and activity. In the effects of interactions between each variable, the combination of pants colors and type of pants/skirt had significant effects on appearance valuation, stability factors. Also shirt and pants colors had an significant effects on appearance valuation, stability, and activity. But in the impression formation of concentration of attention and clearness, only the combination of shirt colors and pants forms was more significant.

• Korean Journal of Optics and Photonics
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• v.9 no.6
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• pp.373-379
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• 1998

A new method is proposed for the design of the dichroic mirrors in 3-LCD projection systems for color separation/composition. Rather than simply basing the color performance cirterion on luminance or chromatic saturation only, the optimum design parameters can be found by maximizing the volume of the perceived color gamut in RLAB color space and related color appearance model and used the linearly approximated spectrum of dichroic mirrors for simplicity and vector space description. By this method, we found optimal half-power wavelengths in dichroic mirrors which maximized our performance criterion.