• 한국멀티미디어학회논문지
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• 제16권1호
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• pp.29-41
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• 2013

디지털 카메라는 제한된 크기의 다이내믹레인지를 갖는 이미지 센서의 한계로 인하여 인간의 눈으로 보는 것과 동일한 화질의 영상을 얻을 수 없기 때문에 이를 개선해야 할 필요성이 있다. 기존의 화질개선방법으로는 Land의 인간의 시각적 모델을 바탕으로 한 Retinex 알고리즘이 대표적이다. Retinex 알고리즘은 칼라의 일관성과 시각적인 개선을 제공하지만, 전역적인 contrast 감소와 후광효과 및 색왜곡 문제를 발생시키기도 한다. 이러한 문제를 개선하기 위해 본 논문에서는 YCbCr 색공간에서 휘도성분의 주파수성분에 대한 처리를 통해 전역적 contrast를 향상시키고, 색차성분에 대한 처리를 통해 칼라 선명도를 향상시키는 방법을 제안한다. 실험 결과영상의 비교를 통해 제안된 알고리즘이 기존의 알고리즘에 비해 연산량 감소효과가 뛰어나며 전역적 contrast 향상과 색상 보전 성능이 우수하고 후광효과를 효과적으로 제거함을 확인하였다.

• 한국실내디자인학회논문집
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• 제7호
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• pp.31-37
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• 1996

The purpose of this study is to grasp the characteristics by image type in interior color. This experiment is carried out by the evaluation method of color simulation with the color image processor. And the result of this experimental evaluation is analyzed quantitatively by HAYASI 1 Program. The results of this analysis are as follows : 1) In casual and clear images, the most main colors are GY, PB, Y , and N, Casual image has high chroma and the most arrangement of colors is hue-contrast or contrast -harmony with white. Also the main colors of clear image are in identical or similar harmony with the hues of floor. 2) In romantic, elegant, pretty, and gorgeous images, the most main colors are GY, RP, R , YR and Y and the most arrangement of colors is identical or similar harmony. The romantic image of pastel tone is wholly lighter than the pretty image of bright tone. And elegant image is lower in chroma than romantic images, so generally dark. Also gorgeous image is the vivid tone with high chroma. 3) In chic and modern images, the main colors are the hues of B, PB, high value and low chroma with bright tone. Also, the main colors are in identical or similar harmony with the hues of floor : BG , B, PB and P. 4) In natural and semiclassic images, the main color is the warm color of Y, YR and the most arrangement of colors is identical or similar harmony. Also Semiclassic images is the dull tone with middle value and middle chroma and darker tone than natural image. 5) In dynamic image, the main color is the hue of N, Y, PB and GY and most of color is high chroma. And the most arrangement of colors is value-contrast.

• 한국정보통신학회논문지
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• 제14권2호
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• pp.462-468
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• 2010

본 논문에서는 기존의 full color LED 전광판 영상 처리 방식을 개선시킨 획기적인 영상 구동 처리 기술을 제안하였다. 이 기술은 고화질의 대형 TV나 LCD Display에 적용 가능하며 선명한 표출구동의 영상제어를 가능하게 한다. 제안한 구동 제어 방식은 기존의 영상처리 기능을 효율적으로 보강할 수 있다. 자동 또는 수동으로 contrast, bright, tint, color, 감마보정 등의 영상 변화처리 조절이 가능하므로 선명한 화질을 얻을 수 있다. 그리고 경제적인 가격으로 구현이 가능하다.

• 방송공학회논문지
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• 제15권3호
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• pp.368-379
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• 2010

고선명 영상에 대한 수요가 증가하면서 다양한 방면에서 좀 더 선명하고 큰 영상을 보고 촬영하려는 요구가 늘어나고 있다. 이에 따라 고선명 동영상의 화질을 향상시키기 위한 적절한 화질 향상 방법이 필요하다. 본 논문에서는 고선명 동영상의 색상과 명암 대비를 개선하기 위한 방법을 제안한다. 고선명 동영상에서 처리 속도를 높이면서 효과적으로 화질 향상 방법을 적용하기 위해 고선명 동영상을 축소시킨 동영상에서 화질 향상 방법에 필요한 변수를 추출해낸다. 고선명 동영상의 색상을 향상시키기 위해 색채 항상성 방법을 사용하였는데 장면별로 동일한 변환값이 적용되도록 동영상을 컷 탐지 방법을 이용하여 분리한 후 장면마다 동일한 변환값을 계산하여 적용한다. 고선명 동영상의 명암대비를 향상시키기 위해 원본 영상과 히스토그램 평활화 영상의 조합을 사용하였고 가중치를 결정하기 위해 히스토그램 순위 기반 방식을 사용하였다. 마지막으로 고선명 동영상을 촬영할 수 있는 디지털 캠코더를 이용하여 촬영한 실험 영상으로 제안하는 방법의 성능을 분석하였다.

• 패션비즈니스
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• 제13권6호
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• pp.125-136
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• 2009

The main objective of this research was to understand the characteristics of complementary color scheme through the analysis of contemporary women's fashion color coordination as they appear in the 'Collections'. Data collection of 115 was done through review of 'pr$\hat{e}$t-$\grave{a}$-porter Collections' of four cities; Milan, London, New York, Paris. Statistical analysis of frequency and also qualitative interpretation of characteristics of complementary color harmony characteristics which appeared in four collections were completed. The main findings were as followed; (1) Only 115 complementary color schemes out of 4968 two color combinations appeared. Compared the comparative ratios of appearance frequency between the two color combination and the complementary color harmony, London showed the highest, and followed by New York, and Milan and Paris. (2)The combined color type of 'red+green' was the most frequently appeared, and followed by 'violet+yellow' and 'orange+blue'. For the type of tone harmony, the contrast tone showed the most, and followed by the similarity and identity. According to the type of complementary color combination, the type of tone harmony used differently. Some differences showed in the types of color harmony and tone harmony between collections. (3) The complementary color scheme which shown in four collections harmonized two opposite colors mainly through the strong tone contrast and this could cause tension along with interest in the image. The complementary colors intensified and brought out the attributes each other. More details, high contrast of two complementary colors of yellow and violet created a vibrant look especially when used at higher saturation. Sometimes, however, some tone variations of two hues neutralized the strong effect and sometimes enhanced each other. When they used in similarity tones or identity tones in light colors, the tension was reduced and became softened but still presented nice harmony. In the type of 'red+green' color harmony, the various color combinations were demonstrated, mostly through tone manipulation of green color. The similarity tone harmony, which used the most, could effect a better sense of harmony and present more sophisticated looks. When used in contrast tone harmony, some changes in its own color which have only one color of two the excessive intensity led a good harmony. The 'orange+blue' color harmony was shown the least and used three tone harmony almost the same ratio. In this color harmony, blue amplified its energy and brilliance of orange and seemed to work better when one color was at a lower intensity than the other. In harmony with a similarity and an identity tone, this color harmony produces a stable and calm image. (4) The complementary scheme appeared more frequently in the S/S collections than in A/W collections and showed some differences in the types of color harmony and tone harmony between seasons, however, no big differences between collections.

• IEIE Transactions on Smart Processing and Computing
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• 제1권1호
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• pp.8-16
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• 2012

An image obtained from a low light environment results in a low-exposure problem caused by non-ideal camera settings, i.e. aperture size and shutter speed. Of particular note, the multiple color-filter aperture (MCA) system inherently suffers from low-exposure problems and performance degradation in its image classification and registration processes due to its finite size of the apertures. In this context, this paper presents a novel method for the color enhancement of low-exposure images and its application to color shift model-based MCA system for image refocusing. Although various histogram equalization (HE) approaches have been proposed, they tend to distort the color information of the processed image due to the range limits of the histogram. The proposed color enhancement algorithm enhances the global brightness by analyzing the basic cause of the low-exposure phenomenon, and then compensates for the contrast degradation artifacts by using an adaptive histogram specification. We also apply the proposed algorithm to the preprocessing step of the refocusing technique in the MCA system to enhance the color image. The experimental results confirm that the proposed method can enhance the contrast of any low-exposure color image acquired by a conventional camera, and is suitable for commercial low-cost, high-quality imaging devices, such as consumer-grade camcorders, real-time 3D reconstruction systems, digital, and computational cameras.

• 한국식생활문화학회지
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• 제28권1호
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• pp.41-47
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• 2013

The purpose of this study is to obtain basic materials to complement the 'time series table serving' by analyzing external color elements. We selected traditional Korean restaurants in two five-star hotels and two famous traditional Korean style restaurants and analyzed their colors and the coloration of the Korean table settings. The results are as follows. By using strong luminosity contrast, restaurant A made its customer focus on the food and used red as the principal point (highlighted) color. Desserts, which have small dimensions, were served in 'Buncheong' ware with 'bakji' method, which has strong contrast; this broke the color balance. The use of small patterned dishes with 'johwa' method would achieve color harmony. Restaurant B used a stronger color for the tables than the foods, making the point color inconspicuous. Lowering the brightness and saturation of the table color would be beneficial. In restaurant C, thick green napkins provided the point color, making the atmosphere of the restaurant dull and dark and interfering with the overall bright atmosphere of the restaurant. Using lower saturation, high luminosity, and yellowish colors would bring harmony to the overall atmosphere. In restaurant D, the point colors were divided into three groups; their diversification during the entire course of the meal made the flow of the meal more natural. However, the use of the violet color, which gives a cold feeling, in the middle of the meal courses broke the overall flow of warm color in the meal. Considering the already-present contrast between red and green, it would be better not to use the violet chrysanthemum in the course of the meal. As mentioned above, there are several issues in terms of the color arrangement, the usage of table pads, and the natural flow of colors. Those issues indicate the necessity for an overall plan for the banquet table set-up in terms of color.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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• pp.27-28
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• 2005

We developed Super IPS mode TFT-LCD TV which have contrast ratio over 800:1. To increase contrast ratio, polarizer film, TFT design and color filter photoresist are investigated. In this report, we describe the basic concept and effectiveness of each item. The application of a newly developed color filter photoresist was the most effective for achieving this high contrast ratio.

• 한국전기전자재료학회논문지
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• 제17권8호
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• pp.871-874
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• 2004

In recent, it is said that the trend of LCD is direction to pursue high qualities like as high transmittance, high contrast ratio, wide viewing angle, fast response time, and so on. Especially, it is known that these qualities are essential to large size LCD like as LCD TV and we can realize them through to uniform cell gap and deep black state. Until now, the ball spacer has been used to control of uniform cell gap. However, the existence of ball spacer inside the cell causes the deformation of the liquid crystal molecules and damage to alignment layer. Such a deformation of the liquid crystal causes light-leakage in the dark state, which lowers contrast ratio of the display. Nowadays, this problem has been solved by using Patterned Spacer on Color Filter. but Side Effect just as gravity mura has been induced. In this paper, we studied the mechanism on gravity mura in case of using patterned spacer on color filter.

• 감성과학
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• 제20권2호
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• pp.137-148
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• 2017

본 연구는 일련의 문자열들 중 하나의 표적을 탐지하는 데 자극 명암대비와 색상이 미치는 영향을 관찰하였다. 실험 1의 각 시행에서는 네 문자로 구성된 RSVP가 제시되고 각 RSVP 화면상의 문자들이 서로 다른 위치를 점유하였다. RSVP 배열 내에서는 한 위치에 회색 표적 문자가, 나머지 위치에 세 방해자극들이 제시된 표적화면을 제외하고 나머지 RSVP 화면에서 네 흰색 방해자극 문자들이 상응하는 위치에 제시되었다. 고가시성 조건에서는 회색 배경화면 보다 표적 회색이 현저히 어두웠던 반면 저가시성 조건에서는 그 밝기 차이가 상대적으로 분명치 않았다. 참가자들은 사전에 지정된 표적들 중 각 시행에서 어느 것이 출현했는지를 가능한 빠르고 정확하게 탐지하도록 요구받았으며 그 결과 관찰된 탐지 수행은 고가시성 조건에서 더 정확했으며 신속했다. 실험 2에서는 고가시성 조건의 회색 표적을 고선명도 유채색 표적으로 대체한 것을 제외하고 실험 1과 동일한 RSVP 화면 및 과제가 사용되었다. 그 결과 참가자들은 고가시성 조건의 표적을 더 정확히 탐지했으나 반응 속도에 있어서는 두 가시성 조건 간 차이가 없었다. 두 실험의 결과는 시각적 부담이 높은 상황일지라도 현저한 명암대비 및 색상이 부여될 경우 자극에 대한 지각이 촉진됨을 시사하며 자극 색상에 비해 명암대비가 지각적 촉진에 더 중요한 역할을 수행할 가능성을 제안한다.