• 제목/요약/키워드: Chromatic red

검색결과 57건 처리시간 0.024초

색채 잔상 지각에서 배경 색에 의해 유도된 색의 가산 혼합 현상 탐구 (The additive mixture of induced colors by background colors in the afterimage)

  • 김선아;정찬섭
    • 인지과학
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    • 제15권4호
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    • pp.21-30
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    • 2004
  • 등광도인 두 색으로 이루어진 배경(적색/녹색, 청색/녹색, 혹은 청색/황색 배경) 위의 중앙에 회색 원이 놓일 때 이 회색 원에 대한 잔상은 본래의 두 배경 색에 대한 가산 혼합 색인 것으로 나타났다. 잔상에 나타난 이러한 흔한 색은 두 배경 색의 광도가 다를 때에도 나타났고, 회색 인의 크기가 증가하였을 때에도 나타났다. 나타난 잔상의 채도는 순응 배경 자극의 평균 광도 값이 증가할수록, 그리고 회색 원의 크기가 감소할수록 증가하는 것으로 나타났다. 하지만 검사 자극의 중앙에 유채색 혹은 무채색의 경계선이 놓일 때 순응 자극의 두 배경 색에 대한 가산 혼합 색은 더 이상 나타나지 않았다. 검사자극에 놓인 경계선은 검사 영역의 양 쪽에서 유도된 객들이 반대편의 영역으로 퍼져나가는 것을 방해하고, 결과적으로 유도된 색이 두 색으로 분리된 상태로 유지하도록 하여 서로가 혼합되지 않도록 돕는 작용을 하는 것으로 추정된다. 검사 자극에 경계선이 놓이지 않는 경우, 잔상에서 유도된 색은 유도된 두 색 사이에 주관적 경계선을 형성하기에는 너무 약한 색 정보를 가지기 때문에 결과적으로 두 색이 반대편의 영역으로 퍼져 색채 혼합이 일어나는 것으로 추정된다.

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Independent Color Filtering of Differently Polarized Light Using Metal-Insulator-Metal Type Guided Mode Resonance Structure

  • Jung, Young Jin;Park, Namkyoo
    • Journal of the Optical Society of Korea
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    • 제20권1호
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    • pp.180-187
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    • 2016
  • The independent operation of a color filter for incident polarization is demonstrated using a guided-mode resonance (GMR) filter employing a metal-insulator-metal (MIM) waveguide. To achieve independent operation, a rectangular MIM grating is proposed as a wave-guide resonator. The design considerations are discussed and include how to determine the grating period and slit width. Power flow distribution is observed with slit width variation. Blue-green, green-red, and blue-red filters for corresponding x- and y-polarizations are demonstrated as application examples with numerical simulation with rectangle-shaped MIM grating. As a practical application, feasibility as a chromatic polarizer is discussed.

고심색용 폴리에스테르 섬유제품의 개발을 위한 공정최적화 연구 (The process optimization for development of super deep black fiber)

  • 김태경;전준형;김은철
    • 한국염색가공학회지
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    • 제19권1호
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    • pp.53-60
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    • 2007
  • In order to optimize the process for development of super deep black fiber, the silica-containing polyester fabric, SN2000, was investigated in terms of mass reduction process by sodium hydroxide, selection of high color strength dyes, and resin treatment. As the results, the mass reduction condition which used 15g/L of sodium hydroxide at $120^{\circ}C$ was determined and Dianix Deep Black Plus was selected for the best deep coloration at around 5% owf. Contrary to the prevailed understanding that the additional use of chromatic dyes would enhance the deep coloration, four kinds of chromatic dyes such as yellow, red, blue, and green dyes did not make great effect on the deep coloration. To increase the effect, the commercial resin that has low refractive index was used additionally and the resin made it possible to lower the lightness of the fabrics down to 8.7 which was generally accepted for super highly deep black fabric.

Chromatic Characteristics of Copper Glaze as a Function of Copper Oxide Addition and Sintering Atmosphere

  • No, Hyunggoo;Kim, Soomin;Kim, Ungsoo;Cho, Wooseok
    • 한국세라믹학회지
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    • 제54권1호
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    • pp.61-65
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    • 2017
  • Examined in this study were the effects of copper oxide (II) addition and sintering conditions on the chromatic characteristics of copper glaze. Oxidatively sintered samples exhibited the negative increase of $CIEa^*$ and the positive increase of $CIEb^*$ with the increase of CuO concentration, leading to Green and Green-Yellow coloration. On the other hand, $CIEa^*$ and $CIEb^*$ of reductively sintered samples were positively increased in direct proportion. The green color of oxidatively sintered samples was originated from the $Cu^{2+}$ ions formed by the dissolution of CuO. The reductively sintered samples resulted in dull tone red color with low chroma. Such behavior seems to be influenced by the interplay of metal Cu aggregation, metal Cu globule, and $Cu_2O$ formed in the glaze layer through the redox interaction of CuO during the sintering process.

감즙에 의한 면직물의 염색성과 기능성 (Dyeability and Functionality of Cotton Fabrics Treated with Persimmon Juice)

  • 허만우
    • 한국염색가공학회지
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    • 제23권4호
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    • pp.241-249
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    • 2011
  • Cotton fabrics was treated with persimmon juice by padding and their dyeability and functionality were assessed including antibacterial activity and deodorization ratio. The merit of padding-based dyeing was easier color reproduction over traditional hand dyeing where various colors and color fastness to light and laundering are hard to obtain. With larger number of padding, the dyed fabrics showed deeper red-yellow colors, which had low brightness and high chromatic colors. The dyed cotton fabrics had a perspiration fastness of 4~5 rating, a rubbing fastness of 3~4 rating, and a washing fastness of 4 rating, As the number of padding and exposed time to sunlight or UV light increase, the values of K/S and ${\Delta}E$ increased and the colors became much deeper gradually. The color development had completed about 70 hours exposure to UV. Among the light sources, the dyed fabrics exposed to UV light showed deeper yellow-red color than those of exposed to sunlight. The cotton fabrics treated with premordants like Al, Cr, Cu, and Sn revealed strong yellow colors, especially the fabrics treated with Fe mordant showed greenish red-yellow colors. As the padding times of dyeing with persimmon juice increased, stiffness and water repellent property were enhanced in warp and weft directions, respectively. Also, the dyed fabrics have good antibacterial activity and deodorization.

감즙 염색에 의한 레이온직물의 염색성과 기능성 (Dyeability and Functionality of Rayon Fabrics Treated with Persimmon Juice)

  • 배정숙
    • 한국의류산업학회지
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    • 제17권5호
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    • pp.828-837
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    • 2015
  • The results of the analysis of dyed rayon fabrics treated with persimmon juice by padding are as follows. Rayon fabrics were dyed repeatedly with persimmon juice by a padding mangle for the development of dyeability. The merits of padding-based dyeing were easier color reproduction (versus traditional hand dyeing) of hard to obtain colors and color fastness to light and laundering. The add on weight increased with the number of padding times, and the color of the dyed fabrics had red-yellow colors with low brightness and high chromatic colors. Properties of fabrics treated with persimmon juice were: $2^{nd}$ level of light resistance, $4^{th}-5^{th}$ perspiration fastness levels, rubbing fastness, and $3^{rd}-4^{th}$ washing fastness levels. Dyed fabrics exposed to UV light have a deep yellow-red color that increased lightness and darken when exposed to sunlight. Rayon fabrics of a treated premordant indicated strong yellow colors, especially fabrics with Fe mordant indicated greenish red-yellow colors. The direction of the weft and warp increased and improved water-repellent qualities that increased with the number of dyeing padding times and persimmon juice; however, there was less anti-crease resistance. In addition, fabrics had good antibacterial activity and deodorization.

Bi-layers Red-emitting Sr2Si5N8:Eu2+ Phosphor and Yellow-emitting YAG:Ce Phosphor: A New Approach for Improving the Color Rendering Index of the Remote Phosphor Packaging WLEDs

  • Nhan, Nguyen Huu Khanh;Minh, Tran Hoang Quang;Nguyen, Tan N.;Voznak, Miroslav
    • Current Optics and Photonics
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    • 제1권6호
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    • pp.613-617
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    • 2017
  • Due to optimal advances such as chromatic performance, durability, low power consumption, high efficiency, long-lifetime, and excellent environmental friendliness, white LEDs (WLEDs) are widely used in vehicle front lighting, backlighting, decorative lighting, street lighting, and even general lighting. In this paper, the remote packaging WLEDs (RP-WLEDs) with bi-layer red-emitting $Sr_2Si_5N_8:Eu^{2+}$ and yellow-emitting YAG:Ce phosphor was proposed and investigated. The simulation results based on the MATLAB software and the commercial software Light Tools indicated that the color rendering index (CRI) of bi-layer phosphor RP-WLEDs had a significant increase. The CRI had a considerable increase from 72 to 94. In conclusion, the results showed that bi-layer red-emitting $Sr_2Si_5N_8:Eu^{2+}$ and yellow-emitting YAG:Ce phosphor could be a prospective approach for manufacturing RP-WLEDs with enhanced optical properties.

감즙에 의한 견직물의 염색성과 기능성 (Dyeability and Functionality of Silk Fabrics treated with Persimmon Juice)

  • 허만우;배정숙;안선영
    • 한국의류산업학회지
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    • 제10권6호
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    • pp.1036-1044
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    • 2008
  • This research from analyzing dyed silk fabrics treated with persimmon juice by padding concludes as follows : The add on is increased as the number of padding increase and the color of the dyed fabrics holds red-yellow colors which has low brightness and high chromatic colors. The fabrics dyed with persimmon juice have properties such as 2nd grade of light fastness, 4~5th grade of perspiration fastness and rubbing fastness, and 3~4th grade of washing fastness. The dyed fabrics exposed to UV light have deeper yellow-red color than things exposed to sunlight. The silk fabrics treated premordants have shown strong yellow colors, especially the fabrics added Fe mordant have shown greenish red-yellow colors. As the padding times of dyeing with persimmon juice are increased, strength and water-repellent property are enhanced along warp and weft direction respectively but anti-crease property is decreased. Also, the dyed fabrics have good antibacterial activity and deodorization.

The Characteristics and Change of Colors on Fashion Collections in 1990s

  • Kim, Honey;Kim, Young-In
    • International Journal of Costume and Fashion
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    • 제7권2호
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    • pp.18-31
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    • 2007
  • The purpose of this study is to examine color characteristics and color changes of the fashion collections through 1990s, and to provide the efficient color information for color planning upon fashion themes. For this research, a total of 30,084 colors were collected from Paris, Milan, London, New York Collections in 1990s. Those colors were first measured by the Pantone Textile Color Specifier and COS Color System and spectrophotometer(color eye 580). These measured color values $L^{\ast}a^{\ast}b^{\ast}$of CIE were converted into H V/C of Munsell System, and 12 tones of PCCS with 5 achromatic colors. The characteristics of collected colors were analyzed in general and by place, season and year. The results of the study are as follows : First, the hues of purple blue, yellow red, red, yellow and the tones of grayish, pale, white, black, dark grayish, dull, light grayish appeared mostly. Yellow was shown quite frequently in spring/summer while purple, purple blue, red and yellow red in fall/winter. White, pale, light, light grayish and light gray were shown more frequently in spring/summer while Black, dark grayish, grayish, dark gray and dark in fall/winter. Second, the characteristics of colors by 4 representative places were similar to the general characteristics of colors in 1990's. Third, There were distributed widely Red, Yellow Red, Yellow in the early 1990s, Green Yellow, Green, Blue Green in the mid of 1990s, and Purple Blue, Purple in the late of 1990s. The distribution range of chromatic colors showed wide in both of the early of 1990s and the mid of 1990s for a while, and achromatic colors of grayish, gray and black appeared mostly in the late of 1900s.

종이책 독서 시 종색수차에 따른 읽기속도와 순목횟수의 상관관계 (Relationship between Reading Speed and Blinking Rate according to Longitudinal Chromatic Aberration during Book Reading)

  • 김세일;박미정;김소라
    • 한국안광학회지
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    • 제20권3호
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    • pp.369-375
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    • 2015
  • 목적: 본 연구에서는 종이책 독서 시 바탕색에 따른 읽기속도와 순목횟수의 변화를 측정하고 이들의 상관관계를 알아보고자 하였다. 방법: 본 연구목적에 동의하고 안질환 및 안과적 수술경험이 없으며, 양안시가 가능한 성인 29명(남10, 여19)의 대상에게 백색, 적색, 녹색 및 청색바탕에 검은색 글씨로 구성되어 있는 소설을 각각 15분 동안 읽게 하였다. 독서 시 장당 읽기속도와 순목횟수를 측정하고 각 바탕색 별로 분석하였다. 결과: 바탕색에 따른 장당 읽기속도는 백색과 녹색바탕에서는 독서시간이 경과함에 따라 빨라지는 경향을 보였으나, 청색바탕에서는 거의 변화가 없었으며, 적색바탕에서는 오히려 느려짐을 알 수 있었다. 반면, 장당 순목횟수는 모든 바탕색에서 독서시간이 경과함에 따라 감소하는 경향을 나타냈으나 적색바탕에서의 감소가 가장 적었다. 모든 바탕색에서 순목횟수가 감소할수록 읽기속도는 증가하는 상관관계를 보였으며, 녹색바탕의 경우 가장 높은 상관관계를 나타내었다. 결론: 본 연구결과 동일한 조절 및 폭주요구량을 가지는 거리에서의 독서 시 순목횟수가 감소할수록 읽기속도는 빨라지는 상관관계를 가짐을 확인하였으나 주 파장에 따라 순목횟수와 읽기속도의 변화는 달라짐을 알 수 있었다. 이는 근업 시 주 파장의 차이에 따라 작업의 속도와 시각피로도가 달라질 수 있음을 의미하므로 요구되는 인지의 종류에 따라 작업환경과 조건의 조정이 이루어져야 함을 제안할 수 있다.