• 한국윤활학회:학술대회논문집
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• 한국윤활학회 2000년도 제31회 춘계학술대회
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• pp.54-61
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• 2000

A method and results of classification of 4 types metallic wear debris were presented by using their color features. The color image of wear debris was used (or the initial data, and the color properties of the debris were specified by HSI color model. Particle was characterized by a set of statistical features derived from the distribution of HSI color model components. The initial feature set was optimized by a principal component analysis, and multidimensional scaling procedure was used for the definition of classification plane. It was found that five features, which include mean values of H and S, median S, skewness of distribution of S and I, allow to distinguish copper based alloys, red and dark iron oxides and steel particles. In this work, a method of probabilistic decision-making of class label assignment was proposed, which was based on the analysis of debris-coordinates distribution in the classification plane. The obtained results demonstrated a good availability for the automated wear particle analysis.

• The Journal of Advanced Prosthodontics
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• 제6권4호
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• pp.309-316
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• 2014

PURPOSE. The color of the ceramic restorations is affected by various factors such as brand, thickness of the layered the ceramic, condensation techniques, smoothness of surface, number of firings, firing temperature and thickness of dentin. The aim of this study was to evaluate the color change and surface roughness in dental porcelain with different thicknesses during repeated firings. MATERIALS AND METHODS. Disc-shaped (N=21) metal-ceramic samples (IPS Classic; Ivoclar Vivadent; Shaar, Liechtenstein) with different thickness were exposed to repeated firings. Color measurement of the samples was made using a colorimeter and profilometer was used to determine surface roughness. ANOVA and Tukey tests with repeated measurements were used for statistical analysis. RESULTS. The total thickness of the ceramics which is less than 2 mm significantly have detrimental effect on the surface properties and color of porcelains during firings (P<.05). CONCLUSION. Repeated firings have effects on the color change and surface roughness of the dental ceramics and should be avoided.

• 패션비즈니스
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• 제11권6호
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• pp.115-124
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• 2007

The cross-section of the polyester filament yarn has been modified to have a variety of shape for aesthetic, added functions and sensitivities, and other purposes. Transparent polyester filament of trilobal cross-section has unique optical properties with high anisotropic reflectivity and transmissivity. The monofilament yarns may be utilized to impart to the fabrics lustrous appearance along with unique color change in case differently dyed yarns are woven together. The color changes of the fabric specimens according to the changes in observation and lighting conditions were analyzed using a CCD camera and an image analysis software. The changes of color/luster of the fabric specimens were measured and analyzed based on RGB, $L^*a^*b^*,\;L^*C^*h,$ and the color distribution within a three-dimensional color space.

• KSTLE International Journal
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• 제1권1호
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• pp.34-42
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• 2000

A method and results of classification of four different metallic wear debris were presented by using their color features. The color image of wear debris was used far the initial data, and the color properties of the debris were specified by HSI color model. Particles were characterized by a set of statistical features derived from the distribution of HSI color model components. The initial feature set was optimized by a principal component analysis, and multidimensional scaling procedure was used fer the definition of a classification plane. It was found that five features, which include mean values of H and S, median S, skewness of distribution of S and I, allow to distinguish copper based alloys, red and dark iron oxides and steel particles. In this work, a method of probabilistic decision-making of class label assignment was proposed, which was based on the analysis of debris-coordinates distribution in the classification plane. The obtained results demonstrated a good availability for the automated wear particle analysis.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2008년도 추계학술대회
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• pp.143-146
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• 2008

The objectives of this study were to evaluate color sensation for yellowish natural dye fabrics using magnitude estimation to determine physical colorimetric factors significantly related to human sensibility by establishing power function in psychophysical analysis. Fourteen different yellowish fabrics dyed with natural colorants were selected as stimuli and subjective color sensations including brightness, heaviness, softness, strength, warmth, activeness, classicalness, femininity, and pleasantness for each stimulus were evaluated. As results, yellowish natural dye fabrics in general seemed to evoke feeling of brightness, femininity, and pleasantness more strongly than that of heaviness and classicalness. Most of color sensation were significantly related with more than one of physical color properties, which leads to establishing reliable power functions between them. In the power functions, these relationships could be utilized to design color-sensible natural dye textiles.

• 한국정보처리학회논문지
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• 제4권6호
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• pp.1418-1432
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• 1997

일반적인 내용기반 화상 검색 기법은 검색 인덱스로서 칼라와 텍스쳐를 사용하며, 칼라기법인 칼라히스토그램과 칼라쌍 검색 기법은 공간정보와 텍스트가 부족하다. 따라서 본 논문은 칼라공간과 키워드를 결합한 내용 기반 화상 검색시스템을 설계하고 구현하였다. 화상검색을 위한 전처리기에서는 기존의 HSI(Hue, Saturation, Intensity) 좌표계를 사용하였고, 화상으로부터 색채 영역과 비색채영역을 검출해 내었다. 화상의 크시는 200*N 또는 N*200으로 정규화하고 256칼라로 변환시킨다. 칼라 공간으로 칼라 선택을 결정하기 위해서는 배경과 색채를 위한 2개의 칼라히스토그램을 사용한다. 공간정보는 최대 엔트로피 이산화를 사용함으로써 얻어진다. 키워드는 화상의 종류, 칼라, 모양, 위치, 크기를 선택 가능하도록 했으며, 입력되는 색채에 대해서는 한국 공업 규격의 유채색과 무채색 15가지 색으로 제한하였다. 화상검색 방법은 유사도 검색의 특징 키로 사용하였고, 화상 검색시 특정 성분의 가중치에 따른 검색을 위해 사용자는 질의어 입력시 칼라공간 ${\alpha}(%),\;키워드\;{\beta}(%)$등의 가중치를 화상 내용 특징에 따라 그 값을 조절하여 부여할 수 있는 방안을 개발하였다. 질의 화상에 대한 칼라공간, 키워드와 같은 추출된 특징중 하나의 특징으로 검색 실험한 결과는 가중치를 부여하여 실험한 결과보다 검색 효율이 낮았으며 가중치를 부여한 경우 측정된 파라메타의 평균치는 Precision(0.858), Recall(0.936), RT(1), MT(0)를 보임으로써 칼라공간, 키워드 내용기반 화상 검색 시스템들 보다 높은 검색 효율을 입증해 보였다.

• 한국염색가공학회지
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• 제22권2호
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• pp.140-144
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• 2010

In this study, we investigated the clean appearance and good stretch properties. Usually, clean appearance concerned with the dyeing properties of core and effect yarns. The dyeing properties between core yarn (conjugate yarn) and effect yarn were determined by the build-up and the color differences using the four different yarns of SDY FD(spindraw yarn full dull), SDY CD(spindraw yarn cation dyeable), POY FD( partially-oriented yarn full dull) and POY CD(partially-oriented yarn cation dyeable). We used the single color dye of C. I. Disperse Blue 79 and mixed colors made by C. I. Disperse Red 60, C. I. Disperse Blue 56, and C. I. Disperse Yellow 54.

• 한국의류산업학회지
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• 제5권5호
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• pp.545-549
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• 2003

Dyeing properties such as migration of disperse dye and color fastness of 4 types of the carrier[Carrier-I(methyl napthalene). Carrier-II(chloro benzene). Carrier-III(aromatic ether) and Carrier-IV(o-phenyl phenol)] were evaluated for the study. For the results, the optimum dyeing time and concentration of the carrier was 30min at $110^{\circ}C$ and 2g/l, respectively. The redyeing ratio of the fabric samples treated with Carrier-II and III was higher than that treated with Carrier-I and IV, thus, if was conclude that the redyeing ratio of the samples treated with Carrier-II and III was excellent. The light fastness of the samples treated with Carrier-III and IV was higher than that of Carrier-I and II in order of 2-4 grades. However, there were little changes in terms of washing and sublimation and rubbing fastness for the samples.

• 한국과학교육학회지
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• 제14권2호
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• pp.236-240
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• 1994

Recently computers are transforming our classroom by means of initiating and expanding teaching and learning. Lloyd (1989) indicates that computers show great promise in a way augmenting the classroom instructional process under the guidance of the teacher. In this paper computer program for mineral identification (called CPMI) is introduced. This program is is to provide a short list of 26 minerals. These mineras are classified using some properties for mineral identification that is color, streak, hardness, specific gravity, luster, and crystal form. Mineral properties can be divided into two groups for operating this program: (1) properties with numeric values, that is hardness and specific gravity; (2) properties whith a single word, that is color, streak, luster, and crystal form.

• 대한가정학회지
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• 제19권2호
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• pp.135-141
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• 1981

This study was conducted to survey the end-use properties of the commercial men's socks. Date were obtained from 16 samples of men's socks gathered from department store, markets, specialty chain and variety store in street. Stretchness, performance of rib top, fiber contents, strength (abrasion and bursting), pilling properties and color fastness of socks tested in this study were as follows. 1. Stretchness of socks was sufficient but elongation of rib top was insufficient, therefore these facts are getting to become problem to consumers. 2. Fiber contents of samples were not in accord with the labelled item and criteria of Textile Fiber Product Identification Act. 3. Strength and pilling properties were vaious in according to fiber contents of socks. Socks blended of synthetic fibers were superior to that pure natural fibers in strength but not in pilling. 4. Color fastness to perspiration and rubbing were sufficient on the whole, but fastness to laundering in stain were very insufficient.