• Journal of the Korean Wood Science and Technology
• /
• 제39권3호
• /
• pp.238-243
• /
• 2011

라디에타 소나무(Pinus radiata D.Don) 열압밀화 목재의 압밀화 시간과 온도에 따른 재색의 변화를 관찰하였다. 색차계를 이용하여 재색을 측정하였으며, NBS (National Bureau of Standards)에 의해 색차를 평가하였다. 그 결과 압밀화 온도의 증가에 따라 백색도는 감소하였고, 적색도와 황색도는 증가하였다. 그리고 대부분의 색차는 'Very Much (대단한 차)'로 나타났다. 압밀화 시간의 증가에 따른 재색의 변화는 압밀화 시간의 증가에 따라 백색도는 감소하였으나 감소폭은 온도에 의한 영향보다 적은 것으로 나타났다. 적색도와 황색도에 미치는 열 압밀화 시간의 영향은 미약하였다. 즉 압밀화 가열온도와 가압시간의 증가에 따라 재색의 암색화가 나타났으며, 재색변화에는 압밀화 시간보다 가열온도의 영향이 더욱 큰 것으로 나타났다.

• 한국의류학회지
• /
• 제29권5호
• /
• pp.680-691
• /
• 2005

The purpose of this study was to investigate the change of color preference of young women living in Seoul, to provide materials which is useful for setting up the color plan for a better costume, and to suggest new information in the apparel study. This study was done on the basis of color preference only by regional characteristics and the range of this study restricted on young women' clothes. The subjects were 1,100 in 1998, 1,393 young women in 2004. They were photographed in the street. The data were analyzed by frequency, percentage and $\chi^2-test$. The results of this study was as follows; The preference of chromatic color and achromatic color, hue and tone, pattern of textiles are different mainly by regional characteristics. 1) In 1998, young women prefered achromatic colors to chromatic colors. and the most preferred achromatic color was black, especially women of YOUNGDUOPO area prefer black. But, in 2004, young women preferred chromatic colors to achromatic colors and the most preferred achromatic color was white in the all areas. 2) Analysis of hue shows that in 1998, blue is most preferred color in the all areas by young women. But, in 2004, the most preferred color was different depending on the areas 3) Analysis of tone shows that in 1998, vivid, pale, dark tones are commonly preferred by young women. However, APGUJUNG area have specially inclination, they prefer vivid, pale and light tone. In 2004 year, pale, vivid and bright tones are most preferred tones in the all areas. 4) Analysis of pattern of textiles shows that, pattern textiles were preferred by young women of APGUJUNGDONG area in 1998 and YOUNGDUOPO area in 2004. The most preferred. pattern for young women in all area was a stripe pattern.

• 한국의류산업학회지
• /
• 제4권1호
• /
• pp.79-85
• /
• 2002

To develope natural dyeing materials from the unused plant materials, we had several dyeing experiments to investigate the optimum conditions of dyeing fabrics with the waste grape juice. Dyeing experiments were done under different dyeing conditions of dyeing time, dyeing temperature, pH and concentration of dyebath and mordants which were treated after dyeing. Experimental fabrics were silk, cotton, ramie and hemp. Color difference(${\Delta}E$) and Munsell's HV/C of the dyed fabrics and color fastness of silk dyed fabrics to dry cleaning, washing, rubbing, perspiration and light were measured. The color differences of dyed experimental fabrics were very slightly increased with dyeing time and the color of dyed silk was light purple and the cotton, ramie and hemp was light red purple. The color differences of dyed experimental fabrics were decreased and the color became lighter with dyeing temperature increased. The color differences of dyed experimental fabrics were decreased and the color changed from light purple to blue with the pH of dyebath increased. The color differences of dyed experimental fabrics were slightly increased with the concentration of dyebath increased. The color of dyed fabric changed with the mordant treatment and were different among the experimental fabrics. On the whole, blue tone increased with the Al and Fe mordant and green tone increased with the Cu mordant. The color fastness of dyed silk fabrics to light, washing (change) and perspiration (change) was bad and color fastness to dry cleaning and rubbing were good.

• 한국멀티미디어학회논문지
• /
• 제21권8호
• /
• pp.829-836
• /
• 2018

This study attempts to detect a shot boundary in films(or dramas) based on the length of a sequence. As films or dramas use scene change effects a lot, the issues regarding the effects are more diverse than those used in surveillance cameras, sports videos, medical care and security. Visual techniques used in films are focused on the human sense of aesthetic therefore, it is difficult to solve the errors in shot boundary detection with the method employed in surveillance cameras. In order to define the errors arisen from the scene change effects between the images and resolve those issues, the mixed algorithm based upon color histogram, edge histogram, and optical flow was implemented. The shot boundary data from this study will be used when analysing the configuration of meaningful shots in sequences in the future.

• Restorative Dentistry and Endodontics
• /
• 제22권2호
• /
• pp.622-636
• /
• 1997

Glass ionomer cements, which had been developed in 1972, were widely used as an agent for cementation, base, pit and fissure sealant, and esthetic filling material with the advantages of excellent biocompatibility, anti-cariogenic fluoride release. Specimens were made to evaluate the color change of Glass ionomer cement with a newly developed improved Fuji II Le. Specimens for color change study with cement thickness of 1, 2, 3mm were made and those for the study of color shift pattern were made with the assumption that new mid-shade can be made by mixing of equal amount of both shades in 2mm thickness. After 24 hours in a $37^{\circ}C$ incubator, CIELAB color spaces were evaluated with a spectrophotometer. The results were as follows ; 1. All specimens discolored to dark and blue with an increased thickness in all shades (p<0.05). 2. There were significant $a^*$ space (red-green direction) changes in every A, B, C, D shade series except the relationship between 1mm and 2mm thickness groups in B shade series. But the changes were irregular, i.e., each shade series has its own pattern. 3. Each shade series showed its own specific color shift pattern in all $L^*$, $a^*$, $b^*$ spaces. 4. B shade series showed less amont of changes in ${\Delta}{\pm}E$ than those of A and C shade series (p<0.05), but there was no significant difference in ${\Delta}E$ within each shade series.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2019년도 춘계학술대회
• /
• pp.618-620
• /
• 2019

농업과 ICT융합 기술이 접목된 스마트팜은 우리나라에서 타 산업보다 낮은 단계에 머물러 있지만 가장 활발한 연구개발이 추진되는 분야이기도 하다. 스마트팜은 농업과 ICT기술 간의 융합을 통해 농업 분야의 각종 정보를 수집하고 가공, 분석하여 단계별 효율성 향상을 높이는데 목적이 있다. 이 연구에서는 원예작물인 딸기의 스마트팜 구성을 위해 수확기에 수확이 가능한 딸기를 색상으로 구분할 수 있는 영상 처리 방법에 대해 연구를 진행 하였다. 딸기 재배 과정에서 딸기 수확은 많은 노동력을 필요로 한다. 이 연구에서는 딸기 수확기에 노동력 절감에 필요한 정보 수집을 목표로 하고 있다. 그 선행 연구로서 빛의 조사 방향 및 밝기 값에 따라 색 온도가 변화하는 형태를 파이썬을 이용한 OpenCV 색상 검출을 통해 구현 해 볼 계획이다. 향후에는 색 온도 변화에 보상 값을 적용하여 수확에 적합한 딸기색상 값을 찾는 연구를 계획하고 있다.

• Bulletin of the Korean Chemical Society
• /
• 제31권12호
• /
• pp.3707-3710
• /
• 2010

A chromo/fluorogenic $NO_2S_2$-macrocycle L functionalized with nitrobenzofurazan unit as a dual-signaling probe was synthesized and structurally characterized by single crystal X-ray analysis. In a cation-induced color change experiment, L exhibited excellent $Hg^{2+}$ ion selectivity by showing the color change from orange-red to yellow. However, this hypochromic shift by $Hg^{2+}$ was observed for the weaker coordinating anion system such as ${NO_3}^-$ and ${ClO_4}^-$ ions. The observed anion effect is due to the strong coordination of anions inhibits the bond formation between $Hg^{2+}$ and the macrocyclic tert-N atom, which is sensitive to induce the color change. In the fluorometric experiment, L showed chelate-enhanced fluorescence change effect only with $Hg^{2+}$ ion, together with a change from yellow to green emission. The sensing ability for $Hg^{2+}$ with the proposed chemosensor L is due to the stable complexation with 1:1 stoichiometry (metal-to-ligand).

• 한국의류산업학회지
• /
• 제3권1호
• /
• pp.35-41
• /
• 2001

Dyeing properties of silk fabric with onion shell were studied by investigating the effect of dyeing conditions, such as concentration of onion shell, dyeing temperature, dyeing time and pH, on dye uptakes. And also the effects of mordants and mordanting methods or color change and dye uptakes were investigated. For the practical use, the various color fastness of dyed and mordanted fabric were evaluated. The color fastness was improved when Fe mordant was added.

• 아시안잔디학회지
• /
• 제8권2호
• /
• pp.65-85
• /
• 1994

This study was carried out to develope DBMS program and use CAD for flower, leaf and fruit characteristics of deciduous woody landscape plants in Suwon, Korea from January 1, 1992 to March 20,1993. The results were as follows : 1. The flower, leaf and fruit characteristics of 211 species which were anthesis, flowering period, flower color, leaf spreading, leaf color before fall leaf coloring, fall leaf color, fruiting, fruit period, fruit color and trunk color were investigated through field survey. 2. DBMS program for flower, leaf, fruit and trunk characteristics of deciduous woody landscape plants was developed with data through field survey. And the DBMS program might contribute to the decision of appropriate times for planting design for flowers, fall foliage color, fruit color and hark color. 3.During this procedure, CAD software was used to demonstrate the deblossom before leaf spreading and leaf spreading in flowering, fall foliage color, fruit color after leaf falling, and hark color for planting design as well as seasonal color change of deciduous woody landscape plants.

• The Journal of Advanced Prosthodontics
• /
• 제6권6호
• /
• pp.427-433
• /
• 2014

PURPOSE. Surface color is one of the main criteria to obtain an ideal esthetic. Many factors such as the type of the material, surface specifications, number of firings, firing temperature and thickness of the porcelain are all important to provide an unchanged surface color in dental ceramics. The aim of this study was to evaluate the color changes in dental ceramics according to the material type and glazing methods, during the multiple firings. MATERIALS AND METHODS. Three different types of dental ceramics (IPS Classical metal ceramic, Empress Esthetic and Empress 2 ceramics) were used in the study. Porcelains were evaluated under five main groups according to glaze and natural glaze methods. Color changes (${\Delta}E$) and changes in color parameters (${\Delta}L$, ${\Delta}a$, ${\Delta}b$) were determined using colorimeter during the control, the first, third, fifth, and seventh firings. The statistical analysis of the results was performed using ANOVA and Tukey test. RESULTS. The color changes which occurred upon material-method-firing interaction were statistically significant (P<.05). ${\Delta}E$, ${\Delta}L$, ${\Delta}a$ and ${\Delta}b$ values also demonstrated a negative trend. The MC-G group was less affected in terms of color changes compared to other groups. In all-ceramic specimens, the surface color was significantly affected by multiple firings. CONCLUSION. Firing detrimentally affected the structure of the porcelain surface and hence caused fading of the color and prominence of yellow and red characters. Compressible all-ceramics were remarkably affected by repeated firings due to their crystalline structure.