• 제목/요약/키워드: Color Light

검색결과 2,990건 처리시간 0.033초

메이크업과 의복의 동일색상 배색에 따른 조화감 평가 (Harmony Evaluation for Same-color Coloration of Makeup and Clothing)

  • 정수진
    • 한국의류학회지
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    • 제31권5호
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    • pp.801-812
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    • 2007
  • In this research, 128 stimuli of same-color coloration of lipstick and clothing were evaluated to the degree of harmony in the coordination of makeup and clothing color depending on the combination of eyeshadow color, lipstick color, lipstick tone, clothing style, and clothing tone. As to the brown eyeshadow, vivid lipstick and vivid, dull clothing, dull lipstick and light, dull, dark clothing, dark lipstick and dull, dark clothing among the combinations of red lipstick and clothing, vivid lipstick and vivid, light, dark clothing, dull lipstick and light, dull, dark clothing, dark lipstick and dark, clothing among the combinations of orange lipstick and clothing were evaluated as harmonious coloration regardless of the clothing style. As to the violet eyeshadow, vivid lipstick and vivid clothing, dull lipstick and light, dark clothing, dark lipstick and dull, dark clothing among the combinations of red lipstick and clothing, vivid lipstick and vivid, dull clothing, dull lipstick and vivid, light, dull clothing, dark lipstick and vivid, dull, dark clothing among the purple lipstick and clothing were evaluated as harmonious coloration regardless of the clothing style. Thus, the degree of harmony cannot only be different according to the clothing style even in the same coloration, but also the same clothing style can be perceived to be different degree of harmony depending on how the color and tone of clothing and lipstick are coordinate.

Deep Blue LED 광원과 형광체를 이용한 초고연색 백색 인공태양광 LED 소자의 개발 (Development & Reliability Verification of Ultra-high Color Rendering White Artificial Sunlight LED Device using Deep Blue LED Light Source and Phosphor)

  • 안종욱;권대규
    • 산업경영시스템학회지
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    • 제46권3호
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    • pp.59-68
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    • 2023
  • Currently, yellow phosphor of Y3Al5O12:Ce3+ (YAG:Ce) fluorescent material is applied to a 450~480nm blue LED light source to implement a white LED device and it has a simple structure, can obtain sufficient luminance, and is economical. However, in this method, in terms of spectrum analysis, it is difficult to mass-produce white LEDs having the same color coordinates due to color separation cause by the wide wavelength gap between blue and yellow band. There is a disadvantage that it is difficult to control optical properties such as color stability and color rendering. In addition, this method does not emit purple light in the range of 380 to 420nm, so it is white without purple color that can not implement the spectrum of the entire visible light spectrum as like sunlight. Because of this, it is difficult to implement a color rendering index(CRI) of 90 or higher, and natural light characteristics such as sunlight can not be expected. For this, need for a method of implementing sunlight with one LED by using a method of combining phosphors with one light source, rather than a method of combining red, blue, and yellow LEDs. Using this method, the characteristics of an artificial sunlight LED device with a spectrum similar to that of sunlight were demonstrated by implementing LED devices of various color temperatures with high color rendering by injecting phosphors into a 405nm deep blue LED light source. In order to find the spectrum closest to sunlight, different combinations of phosphors were repeatedly fabricated and tested. In addition, reliability and mass productivity were verified through temperature and humidity tests and ink penetration tests.

Perceived color shift of ceramics according to the change of illuminating light with spectroradiometer

  • Cha, Hyun-Suk;Yu, Bin;Lee, Yong-Keun
    • The Journal of Advanced Prosthodontics
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    • 제5권3호
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    • pp.262-269
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    • 2013
  • PURPOSE. Perceived color of ceramics changes by the spectral power distribution of ambient light. This study aimed to quantify the amount of shifts in color and color coordinates of clinically simulated seven all-ceramics due to the switch of three ambient light sources using a human vision simulating spectroradiometer. MATERIALS AND METHODS. CIE color coordinates, such as $L^*$, $a^*$ and $b^*$, of ceramic specimens were measured under three light sources, which simulate the CIE standard illuminant D65 (daylight), A (incandescent lamp), and F9 (fluorescent lamp). Shifts in color and color coordinate by the switch of lights were determined. Influence of the switched light (D65 to A, or D65 to F9), shade of veneer ceramics (A2 or A3), and brand of ceramics on the shifts was analyzed by a three-way ANOVA. RESULTS. Shifts in color and color coordinates were influenced by three factors (P<.05). Color shifts by the switch to A were in the range of 5.9 to 7.7 ${\Delta}E{^*}_{ab}$ units, and those by the switch to F9 were 7.7 to 10.2; all of which were unacceptable (${\Delta}E{^*}_{ab}$ > 5.5). When switched to A, CIE $a^*$ increased (${\Delta}a^*$: 5.6 to 7.6), however, CIE $b^*$ increased (${\Delta}b^*$: 4.9 to 7.8) when switched to F9. CONCLUSION. Clinically simulated ceramics demonstrated clinically unacceptable color shifts according to the switches in ambient lights based on spectroradiometric readings. Therefore, shade matching and compatibility evaluation should be performed considering ambient lighting conditions and should be done under most relevant lighting condition.

Size Effect of Light Scattering on the Nano-Sized Color Filter Pigment in Liquid Crystal Display

  • Jhun, Chul Gyu;Gwag, Jin Seog
    • Journal of the Optical Society of Korea
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    • 제18권2호
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    • pp.184-187
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    • 2014
  • This study examined the effects of particle size on the light scattering of a nano-sized color filter pigment used to obtain a range of colors in liquid crystal displays. The contrast ratio is one of the most important characteristics of liquid crystal displays. When a color filter is located between two crossed polarizers, the size of the pigment can give rise to a decrease in the contrast ratio due to Rayleigh scattering by the nanoparticles in the filter. The size effect of the color filter pigment on the contrast ratio was investigated in terms of the depolarization parameter. As an experimental result, the depolarization parameter increased with decreasing pigment size. Therefore, a smaller pigment size can reduce light leakage caused by light scattering in the color filter between two crossed polarizers. The depolarization function was also proposed as a useful function for predicting the decrease in the contrast ratio of the color filter.

Kobayashi 스케일과 I.R.I 스케일을 사용한 LED 광색의 형용사 이미지 분석 (The Analysis of Emotion Adjective for LED Light Colors by using Kobayashi scale and I.R.I scale)

  • 백창환;박승옥;김홍석
    • 조명전기설비학회논문지
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    • 제25권10호
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    • pp.1-13
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    • 2011
  • The aim of this study is to analyze the emotion adjectives for light emitting diode(LED) light colors using a twofold adjective image scales from Kobayashi and I.R.I. A set of psychophysical experiments using category judgment was conducted in an LED light color simulation system, in order to evaluate each emotion scale coordinate for those test light colors in both adjective image scales. In total, 49 test light colors from a combination of 6 color series were assessed by 15 human observers. As a result, Kobayashi adjective image scale clearly expressed to emotion adjectives of 'Dynamic', 'Casual', 'Chic', 'Cool-casual', 'Modern', and 'Natural' for different hues. In contrast, I.R.I adjective image scale expressed only 2 adjectives of 'dynamic' and 'luxurious' for the all hues.

렌즈 무반사막 구조에 의한 반사색광의 특성 연구 (The Reflection Color Light with the Structure of an Antireflection Lenses)

  • 김용근
    • 한국안광학회지
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    • 제1권1호
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    • pp.93-102
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    • 1996
  • 렌즈의 광학계의 분광투과률을 높이기 위한 방법으로 무반사막의 다층화에 의한 광대역화와 낮은 반사률이 중요하다. 그러나 잔류반사광이 발생하여 반사색광이 미약하게 나타난다. 이런 반사색광은 두께, 굴절율, 층수, 입사광의 파장, 기판물질 등의 구조에 의한 반사광의 파장 영역을 제어할 수 있다. l층, 2층 구조에서 ${\lambda}s/{\lambda}$=1.0인 조건하에서 무반사시키면, 다른 영역에서 나온 반사광들이 색혼합된 반사색광을 얻을 수 있고, 3층 구조에서 ${\lambda}0/{\lambda}$$PI{\ll}1$, $P2{\gg}1$ 에서 무반사시키면 P1< ${\lambda}0/{\lambda}$

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한국 전통주택의 실내 배색 및 색조 특성에 관한 연구 -조선후기의 상류주택을 중심으로- (Characteristics of Interior Color combination and Tone in Korean Traditional Houses -Focused on Upper Class Houses of the Late Chosun Dynasty-)

  • 신인호;박영순
    • 한국실내디자인학회논문집
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    • 제19호
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    • pp.91-97
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    • 1999
  • The purpose of this study is to identify the color combination characteristic and to find out the characteristics of color tones in interior environments of Korean traditional houses. The results of the interior color combination analysis, it was revealed that contrast was the most dominant in architectural elements color. In the furniture, graduation, contrast and analogous harmony were mainly used. Single color harmony, analogous harmony, complementary harmony were the dominant color combination characteristics in interior accesories. Color tones of architectural elements were dull and light(pale, light grayish, light grayish) and color tones of furniture were dark and dull(dull, dark, dark grayish). However, interior accessories of an-bang show wide range of color tones raging vivid to dark tone, while sarang-bang accessories have tendency to soft, gray and dull tones. Therefore, the color tones of an-bang and sarang-bang elements show clear differences.

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Development of Color 3D Scanner Using Laser Structured-light Imaging Method

  • Ko, Youngjun;Yi, Sooyeong
    • Current Optics and Photonics
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    • 제2권6호
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    • pp.554-562
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    • 2018
  • This study presents a color 3D scanner based on the laser structured-light imaging method that can simultaneously acquire 3D shape data and color of a target object using a single camera. The 3D data acquisition of the scanner is based on the structured-light imaging method, and the color data is obtained from a natural color image. Because both the laser image and the color image are acquired by the same camera, it is efficient to obtain the 3D data and the color data of a pixel by avoiding the complicated correspondence algorithm. In addition to the 3D data, the color data is helpful for enhancing the realism of an object model. The proposed scanner consists of two line lasers, a color camera, and a rotation table. The line lasers are deployed at either side of the camera to eliminate shadow areas of a target object. This study addresses the calibration methods for the parameters of the camera, the plane equations covered by the line lasers, and the center of the rotation table. Experimental results demonstrate the performance in terms of accurate color and 3D data acquisition in this study.

위장관암 발견에 있어 Linked Color Imaging와 Blue Light Imaging의 유용성 (Detection of Gastrointestinal Cancer using Linked Color Imaging and Blue Light Imaging)

  • 유인경;조주영
    • Journal of Digestive Cancer Research
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    • 제7권2호
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    • pp.31-39
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    • 2019
  • The early detection of early gastric cancer (EGC) is important. However, the sensitivity of conventional white light imaging (WLI) in detecting EGC had been reported to range only from 77% to 84%. Although the resolution of endoscopes has been remarkably developed, precancerous lesions such as adenomas and microscopic early cancers are difficult to diagnose with general endoscopy. Linked Color Imaging (LCI) magnifies the differences in color for easy detection. Therefore, it produces a bright image from a distance and is performed for screening endoscopy. The 410 nm wavelength of BLI (Blue Light Imaging) helps to detect cancer by showing microstructure and microvessels in the mucosal superficial layer. This review will focus on the utility of Image enhanced endoscopy (IEE) techniques in diagnosis of gastrointestinal cancer.

광원(光源), 배경색(背景色), 소요시간(所要時間)이 치아색(齒牙色) 선택(選擇) 능력(能力)에 미치는 영향(影響) (A CORRELATIVE STUDY OF THE EFFECTS OF LIGHT SOURCE, BACKGROUND COLOR, AND TIME SPENT ON THE ABILITY TO MATCH TOOTH SHADE)

  • 권오임
    • 대한치과보철학회지
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    • 제16권1호
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    • pp.38-44
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    • 1978
  • Color is an important factor in dental esthetics. Application of natural tooth color will not fail to produce pleasing results. But a standardized method of shade matching has not been adopted. If we are to overcome the color matching problem in dentistry, an understanding of the nature of color and light is essential. The purpose of this study was to compare the effects of different light sources and different background colors on the ability of observers to correctly match shades of artifical teeth. And observation was made to determine if the time spent in making a shade match was a factor in the correctness of the response. A test method was devised and 50 individuals made observations which were recorded and analyzed. $X^2$-test gave results indicating that the time factor had no effect on the response made. An analysis of variance showed the following effects significant at the five percent level; (1) light source (2) background color (3) subject. The following conclusions can be drawn from this study; (1) The time spent in making shade selection is not a factor in the correctness of the selections. (2) The light source used is an important factor in matching tooth shade; and there is no significant difference between the light sources in shade matching. (3) Under the conditions of this study, the greatest accuracy in shade matching was obtained on the brown background.

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