• 한국실내디자인학회논문집
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• 제21권3호
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• pp.87-94
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• 2012

This thesis has purpose of explaining that blur color is not only appreciated but also undecided spacial color in contemporary space design and examining effects of space experience through the light. In keeping such developments, blur color has been perceived as the object of another tool in contemporary space and has provided us with new views by providing various program, sensor and screen from digital media. With the expansion of blur color, light has changed a spacial color structural that is not simple meaning factor into the essential concept. So this research aims to understand the principle of blur color in Olafur Eliasson's work, which of the fine artist in diverse fields from installation art to media art. The principle of blur color such as deconstruction of vanishing point, dimensional transfer, color gradation, and fiction of visual perception makes it possible to extract the expressed element and method of blur color. Meanwhile, the features of blur color such as sense of depth from viewpoint changes, hybrid from collapse of order, media metamorphosis from reconstitution and interaction from uncanny can be inferred from case analysis.

• 한국세라믹학회지
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• 제46권4호
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• pp.379-384
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• 2009

Zirconia is widely used for structural materials in machinery due to its superior properties, such as high strength, high hardness, and high toughness. Zirconia generally has ivory or white color. Therefore many studies are performed for diversification of zirconia color, in order to be widely uitilized for decoration and machine parts which need distincfive color. In this study, graphite is used to prevent structural defect, to maintain superior properties, and to develop black color of zirconia by impregnation method. As specimen was impregnated at $1600^{\circ}C$ for 2 h, bending strength is 1221 MPa, density is $6.01\;g/cm^3$, hardness is 10.1 GPa, absorption coefficient is 0%, transmittance is Fail, chromaticity is 54. The results indicate that black zirconia has enough properties to be adopted as mechanical parts. Optimum impregnation time is 2 h for various observations.

• Restorative Dentistry and Endodontics
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• 제2권1호
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• pp.50-54
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• 1976

16 healthy teeth extracted have been selected and their color and structural change have been observed at the fixed temperatures of $200^{\circ}F$., $400^{\circ}F$., $600^{\circ}F$., and $800^{\circ}F$. respectively at the intervals of 10min. 30min and 60min. The results were as follows: 1) $200^{\circ}F$ Groop: At the 60 minutes interval, crown surface shows pattern simliars to mottled teeth and roots take on light yellowish colar and interglobular dentin tends to be rough. 2) $400^{\circ}C$ Groop: at the 30 minutes interval, cracks begin to show in the direction of long axis of the teeth and crown surface have been observed on the verge of fracture at the 60 minutes interval. 3) $600^{\circ}F$ Groop: Crowns take on grayish-white color thoroughout 10, 30 and 60 minutes intervals and roots reveal black color. Moreover the seperation of enamel from dentin has been confirmed at the 60 minutes interval and inner dentin has changed black. 4) $800^{\circ}F$ Groop: Crowns take on the same grayish-white color as at the $600^{\circ}F$ at the 10, 30 and 60 minutes intervals and roots reveal gray color at the 30 and 60 minutes intervals, while parts of the crown have fractured at the 10 minutes interval. Inner dentin has turned gray at the 60 minutes interval.

• 한국재료학회지
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• 제19권12호
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• pp.657-660
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• 2009

Optical characteristics and structural changes depending on CuO content in phosphate glasses that are used in near-infrared (near-IR) filters were investigated. With phosphate glasses that contain 1-9 mol% CuO, changes in optical transmittance, optical absorption, and color coordinate were measured with a UV-VIS spectrophotometer. An XPS (X-ray photoelectron spectroscopy) analysis was performed to determine valence of copper ion that influences optical characteristics in near-IR filter glasses. Structural changes in glasses depending on CuO content were also analyzed by FT-IR (Fourier transform infrared) and Raman spectrophotometers. From the UV-VIS spectrophotometer results, strong absorption peaks at 220 & 900 nm were found and transmittance was decreased. The color coordinates of the glasses were shifted to the green color direction with CuO addition for increasing absorption of long wavelength range spectra, in spite of the amount of $Cu^{2+}$, which gives a blue color to glasses, and which was increased in XPS results. Also, structural de-polymerization of glasses with CuO addition were found by FT-IR and Raman results.

• 감성과학
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• 제15권1호
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• pp.141-148
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• 2012

본 연구에서는 생체모방기술을 응용하여 감성의류용 구조발색사를 방사하고, 이를 사용하여 직물을 제직 감량 가공하여 이들의 발색성 및 촉감 물성을 측정하여 감성의류용 용도의 적용성을 확인하여 다음과 같은 연구결과를 얻었다. 삼각단면을 가진 37층의 폴리에스테르와 나일론을 교호로 적층한 구조발색사의 방사조건을 확립하였으며, 이 세 가지 사의 발색성을 multi angle spectro-photometer로 확인하였다. 그리고 이 사들로 제직한 구조발색 직물 세 가지의 겉보기 색차와 반사율을 분석한 결과, 700nm에서 400nm까지의 파장에서 발색성을 확인하였다. 또한, 직물의 밀도와 조직이 다른 세 가지 구조발색 직물을 제직하고 감량 가공 처리하여 직물 역학특성치에서 촉감을 측정한 결과, $100^{\circ}C$, 60분 감량 처리한 시료가 최적설계(194ends/in ${\times}$ 105picks/in) 및 감량 조건임을 확인할 수 있었다. 그리고 감량 처리 시 온도와 처리시간 증가에 따라 감량률이 13%에서 최대 23%까지 증가함을 확인할 수 있었다. 이때 직물의 신축특성, 굽힘강성 및 전단강성은 감소하며 압축특성은 증가하는 현상을 보였다. 그리고 최적설계조건인 1번 직물시료를 $100^{\circ}C$, 60분 감량 처리할 때 촉감이 가장 우수하며 일본 몰포 직물보다 더 우수한 촉감치를 얻었다.

• 전자공학회논문지CI
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• 제43권2호
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• pp.63-71
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• 2006

칼라 영상의 잡음 제거 및 복원은 컴퓨터 비젼 및 영상 처리 분야에서 점점 더 많은 연구가 되어지고 있는 분야이다. 칼라얼굴 영상에서의 잡음 제거 및 복원은 색상들 간의 미묘한 상호작용뿐만 아니라 얼굴의 구조학적 특징 때문에 일반적인 영상의 처리보다 더욱 어렵다. 본 논문은 벡터기반의 영상 필터들을 이용하여 제거하기 어려운 칼라 얼굴 영상의 복합 잡음을 제거 하기 위해 PCA 재구성 기반의 잡음 제거 방법을 제안한다. 제안된 방법은 PCA를 이용한 정준 고유얼굴 공간의 학습단계, 동적 외양 모델을 이용한 자동적인 얼굴 특징 추출 단계, Bilateral 필터를 이용한 복원된 칼라 영상의 재조명(Relighting) 단계, 학습 데이터들의 분산 값들을 이용한 잡음 영역 추출 단계, 입력 영상의 부분 정보를 이용한 재구성과 이를 원본 영상과 합성하여 잡음이 제거된 영상을 생성하는 단계 등 총 5 단계로 구성된다. 실험결과는 제안된 방법이 입력 얼굴 영상들의 구조적 특징들은 잘 유지하면서 복합적인 칼라 잡음 등을 효과적으로 제거하는 것을 보인다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 추계학술대회논문집
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• pp.132-137
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• 2003

For the evaluation of acoustic noise of a DLP projector, vibration and sound characteristics of a DLP projector were studied. The acoustic noise of DLP projector could be classified into three categories, that is, the direct noise from a body of rotation, the air-bone noise generated from turbulence or vortex occurred during cooling process and the structural born noise produced by vibrating elements. Cooling fans and color filter wheel which rotates at 9000 rpm are main causes of acoustic noise induced in DLP projector. Since the structure of an optical module in a DLP projector can be excited by the excessive vibration of a color filter wheel, the structural design for anti-vibration should be considered. To make a reduction of overall acoustic noise, the anti-vibration design and the enclosing structure have been studied and applied to a color filter wheel.

• 한국소음진동공학회논문집
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• 제14권9호
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• pp.861-867
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• 2004

For the evaluation of acoustic noise of a DLP projector, vibration and sound characteristics of a DLP projector were studied. The acoustic noise of DLP projector could be classified into three categories, that is, the direct noise from a body of rotation, the air-bone noise generated from turbulence or vortex occurred during cooling process and the structural born noise produced by vibrating elements. Cooling fans and color filter wheel which rotates at 9000 rpm are main causes of acoustic noise induced in DLP projector. Since the structure of an optical module in a DLP projector can be excited by the excessive vibration of a color filter wheel, the structural design for anti-vibration should be considered. To make a reduction of overall acoustic noise, the anti-vibration design and the enclosing structure have been studied and applied to a color filter wheel.

• 한국실내디자인학회논문집
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• 제20권4호
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• pp.136-144
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• 2011

The purpose of this research is to analyze the manifestation of children's color education in the software in order to evaluate conditions of color education as well as improvement of its direction. The procedure and method of the research is begun from evaluating the characteristic of children's developmental stage, content analysis of the nation's organization of color education and analysis and evaluation of education program through the investigation on 8 different softwares in reward for the tournament. The results are as followings; First, the research shows that the elementary school stage of color education is inadequate in comparison to children's cognitive developmental stage. Second, most of the color theory was composed of characteristic of a color, stimulation of emotion and effects of psychology. Considering of children's cognitive development, it is necessary to make up for the basic of color theory and the system of color. Third, Softwares of color education program for 1 st. and 2nd grade in elementary school was so rare that it should be properly developed and made for systematic contents. Fourth, color education for the 5th and 6th grade children remained in understanding basic characteristics of the color which is below the par and brings the necessity for more professional and structural contents.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권1호
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• pp.257-271
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• 2016

The Structural SIMilarity (SSIM) index is one of the most widely-used methods for perceptual image quality assessment (IQA). It is based on the principle that the human visual system (HVS) is sensitive to the overall structure of an image. However, it has been reported that indices predicted by SSIM tend to be biased depending on the type of distortion, which increases the deviation from the main regression curve. Consequently, SSIM can result in serious performance degradation. In this study, we investigate the aforementioned phenomenon from a new perspective and review a constant that plays a big role within the SSIM metric but has been overlooked thus far. Through an experimental study on the influence of this constant in evaluating images with SSIM, we are able to propose a new solution that resolves this issue. In the proposed IQA method, we first design a system to classify different types of distortion, and then match an optimal constant to each type. In addition, we supplement the proposed method by adding color perception-based structural information. For a comprehensive assessment, we compare the proposed method with 15 existing IQA methods. The experimental results show that the proposed method is more consistent with the HVS than the other methods.