• 한국컴퓨터정보학회논문지
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• 제14권9호
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• pp.21-28
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• 2009

색상 극화란 주어진 텍스트 영역에서 글자색이 무엇인지를 결정하는 과정으로서 텍스트 추출을 위해서 선행되야 하는 작업이다. 본 논문에서는 텍스트 영역이 주어졌을 때 글자 영역을 추출하기 위한 색상 극화 기법을 제안한다. 제안된 방법은 글자 영역과 배경 영역에 대한 관찰을 바탕으로 두 영역 사이의 면적 비율과 표준편차비율의 관계를 색상 극화에 이용한다. 이를 위하여 그레이 스케일로 주어진 텍스트 영역을 Otsu의 방법으로 이진화하고 이진화된 두 영역을 각각 4-CC 레이블링한다. 레이블링된 두 그룹의 영역에 대해 각각 면적과 영역 중심으로부터의 거리에 대한 표준편차를 계산한 다음 두 그룹에서 면적이 가장 넓은 영역을 갖는 영역 사이의 면적 비와 표준편차가 가장 작은 영역들 사이의 표준편차 비를 이용하여 색상 극화를 수행한다. 다양한 폰트와 크기를 갖는 텍스트 영역에 대한 실험을 통해 제안된 방법이 강건하게 색상 극화를 수행함을 확인하였다.

• Current Optics and Photonics
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• 제1권1호
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• pp.12-16
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• 2017

Color sensor systems based on M13 bacteriophage are being considerably researched. Although many studies on M13 bacteriophage-based chemical sensing of TNT, endocrine disrupting chemicals, and antibiotics have been undertaken, the fundamental physical and chemical properties of M13 bacteriophage-based nanostructures require further research. A simple M13 bacteriophage-based colorimetric sensor was fabricated by a simple pulling technique, and M13 bacteriophage was genetically engineered using a phage display technique to exhibit a negatively charged surface. Arrays of structurally and genetically modified M13 bacteriophage that can determine the polarity indexes of various alcohols were found. In this research, an M13 bacteriophage-based color sensor was used to detect various types of alcohols, including methanol, ethanol, and methanol/butanol mixtures, in order to investigate the polarity-related property of the sensor. Studies of the fundamental chemical sensing properties of M13 bacteriophage-based nanostructures should result in wider applications of M13 bacteriophage-based colorimetric sensors.

• 한국통신학회논문지
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• 제33권2C호
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• pp.178-183
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• 2008

비디오 문자는 중요한 내용정보를 담고 있기 때문에 비디오의 내용 해석에 있어서 매우 중요한 정보이다. 본 논문에서는 스트록 필터를 이용해 자동으로 문자영역을 이진화하는 방법을 제안하였다. 제안된 문자 이진화 방법은 스트록 필터에 의한 문자컬러극성 결정단계, 스트록 필터의 응답치에 대한 이진화 단계, 그리고 국소 영역 확장 단계로 구성되어 있다. 본 방법은 스트록 필터의 응답치를 이용해 문자의 컬러 극성을 결정함으로 인해 극성 결정 성능이 뛰어나다. 또한 문자의 획 특성을 고려해 문자영역을 이진화하기 때문에 배경영역의 변화에 대하여 강인한 이진화 성능을 나타낸다. 다양한 비디오 영상에 대하여 실험한 결과, 이진화 성능이 우수함을 확인할 수 있었다.

• Bulletin of the Korean Chemical Society
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• 제26권1호
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• pp.47-50
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• 2005

Solvatochromic fluorescence behavior of 8-aminoquinoline based benzothiazole derivative in varying solvent systems has been investigated. Benzothiazole appended 8-aminoquinoline 3 showed distinctive fluorescence color changes depending upon the solvent polarities and the fluorescence color changes occurred over relatively wide span in visible region from 486 nm to 598 nm which can be detected with naked eye. Compound 3 also exhibited significant spectral shifts in ${\lambda}_{em}$ as a function of water composition in binary aqueous solvent systems. The changes are due to the specific interaction of 3 by hydrogen bonding with water as well as general solvent effect. The observed solvatochromic fluorescence characteristics of 3 could be used as a new probe for the micro-environmental polarity changes as well as a sensitive sensor for the determination of water composition in binary aqueous solutions.

• 인지과학
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• 제17권4호
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• pp.337-356
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• 2006

본 연구에서는 시각디스플레이에서 단어와 배경간의 밝기, 대비부호, 색상 차이가 가독성 및 감성에 미치는 효과를 살펴보았다. 실험 1에서는 밝기차이(대, 중, 소)${\times}$대비부호(정적, 부적) 조건에 따른 가독성, 심미성, 선호도의 효과를 알아보았다. 실험 1의 결과, 밝기 차이가 커짐에 따라 가독성, 심미성, 선호도가 증가하였다. 실험 2에서는 실험 1 조건에 네 가지 색상 요인(초록, 빨강, 노랑, 파랑)을 추가하여 수행하였다. 그 결과 가독성에서는 밝기와 대비부호의 주효과, 밝기와 대비부호간의 상호작용효과가 유의미하였으며, 심미성과 선호도에서는 밝기, 대비부호, 색상의 주효과, 밝기와 색상간의 상호작용효과가 유의미하였다. 즉 밝기의 차이가 커짐에 따라 가독성, 심미성, 선호도가 증가하였으며, 정적대비가 부적대비에 비해 가독성, 심미성, 선호도가 더 좋았으며, 색상은 빨강, 파랑, 초록, 노랑 순으로 심미성과 선호도가 높은 결과를 보였다. 또한 가독성에서 밝기와 대비부호간의 상호작용효과는 밝기의 차이가 작은 조건에서 부적대비가 정적대비보다 반응시간이 길게 나타났기 때문인 것으로 보인다. 심미성과 선호도에서 밝기와 색상간의 상호작용효과가 나타난 것은 밝기 차이가 작은 조건에 비해 큰 조건에서 색상에 따른 심미성효과가 유의미하게 차이가 있었기 때문인 것으로 보인다. 실험 3에서는 텍스트 디자인과 단일색을 대상으로 18개의 감성 어휘를 평정하게 하여 감성의 유사성을 측정하였다. 그 결과, 특정 색이 지닌 주관적인 느낌이 텍스트 디자인에 잘 반영되기 위해서는 배경에 그 색을 사용하는 것이 더 적절하다는 결론을 얻었다.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2007년도 춘계학술대회 학술발표 논문집 제17권 제1호
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• pp.444-447
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• 2007

본 논문에서는 비디오에서 자막을 자동 추출하기 위한 강건한 자막 분리 알고리즘을 제안한다. 주어진 비디오에서 자막이 존재할 가능성이 있는 프레임에 대해 자막 후보 영역의 위치를 찾은 다음, 자막 후보 영역으로부터 강건하게 자막을 추출한다. 추출된 자막 후보 영역에 대해 Dampoint labeling을 수행하여 자막과 비슷한 색상을 갖는 배경을 제거하고, 마지막으로 기하학적 검증을 통해 최종적으로 자막 여부를 판별한다. 제안된 방법을 여러 장르의 비디오에 대해 적용 결과 복잡한 배경을 갖는 비디오에서 자막을 강건하게 추출함을 실험을 통해 확인하였다.

• 한국염색가공학회지
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• 제31권3호
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• pp.127-134
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• 2019

Cotton fabrics were treated with gelatin to improved their dyeability, color strength toward cochineal dye. Gelatin were used as the protein. Gelatin is containing a large number of hydrophilic groups. Pad-dry-cure method was used for the treatment process(10g/L concentration). The scanning electron micrograph showed the gelatin was deposited on the surface of cotton. Pretreated fabrics were mordanted with 10%(owf) alum. Then the fabrics were dyed with cochineal. Compared with original cotton fabric the K/S value with cochineal dyes was significantly improved on gelatin modified cotton. Treating cotton with 10g/L concentration gelatin offered higher cochineal adsorption. The dyeability of pH 4 yielded the highest color strength. In dyebaths of a ratio of ethanol and water such as; 10:0, 9:1, 8:2, 7:3, 6:4, 5:5, 4:6, 3:7, 2:8, 1:9, 0:10, fabrics were dyed. The ratio of ethanol and water had powerful effects on solution polarity. Cochineal dye uptake showed maximum value, when the proportion of ethanol and water was 9:1. Dyeing at increased temperatures and with increased time resulted in higher dye uptake and reddish-purple color(5RP). The washing fastness was 1-2grade, and the fastness to light was 2-3grade.

• 한국의류학회지
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• 제21권5호
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• pp.911-921
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• 1997

Recently the interest in natural dyeing has been increased because of the color clarity, natural grace and reactionism in fashion. Indigo dyeing, safflower dyeing and Gal-ott in Cheju-Do become generally known, so the study about the natural dyeing is continued with national intrust and support. In this study, 1 used artemisia for various dyeing tests because we can get it easily. 1 tested the dyeability in wool as well as cotton and silk with wormwood in natural dyeing material. I also dyed nylon with the same material for the comparison of the molecular structure. The mercerization and the chitosan treatment were done in cotton to improve the low dyeability in the natural dyeing. The result of this study are as follows; We have to dye repeatedly to get deep color in natural dyeing, and mordant treatment brought good result in color difference and dyeing fastness. 1. Compared with silk, wool and nylon, the dyeability of cotton was the worse. The color difference of cotton was 18.81 without mordants , and 24.05 with mordant. The dyeability of cotton was much increased by mordants such as potassiumdichromate, copper sulfate, iron sulfate and salt water. The color of cotton was turned into yellow-green in potassium dichromate and yellow-green with deep green in copper sulfate. The mercerization and the chitosan treatment of cotton made the improvement in color, dyeability, laundering fastness, abrasion fastness. 2. The color difference of silk was 3 times as high as cotton. It showed the similar degree with the chitosan treated-cotton. That is to say, silk had good dyeability because it contains amino group and carboxyl group. The dyebility of silk was increased by a mordant such as iron sulfate, potassium dichromate and salt water, Drycleaning fastness showed 5 grade, abrasion-fastness was high over 4~5 grade and sunlight fastness showed 1 grade in all case. 3. The color difference of wool was the best among four fabrics because of 18 kinds of amino acids. It is considered that the sulfate of wool has the polarity and help metal- mordants get the better dyeability such as potassium dichromate, iron sulfate, copper sulfate, and aluminum chloride. The color was reddish-green in potassium dichromate, yellow.greenin iron sulfate and copper sulfate, and yellow in the rest mordants. Drycleaning fastness of wool showed over 4~5 grade, abrasion fastness 5 grade. Sunlight-fastness 1 grade. 4. The dyeability of nylon was almost same because of the similar molecular structure with silk. The clarity of color was poor. The color was yellow-green in copper sulfate and yellow in the rest mordants. Laundering fastness and abrasion-fastness of nylon was good. Sunlight- fastness represented 1 grade.

• 제어로봇시스템학회논문지
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• 제16권11호
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• pp.1089-1095
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• 2010

We propose an image segmentation method for auto-teaching system of PCB (Printed Circuit Board) assembly inspection machines. The inspection machine acquires images of all components in PCB, and then compares each image with its standard image to find the assembly errors such as misalignment, inverse polarity, and tombstone. The component window that is the area of component to be acquired by camera, is one of the teaching data for operating the inspection machines. To reduce the teaching time of the machine, we newly develop the image processing method to extract the component window automatically from the image of PCB. The proposed method segments the component window by excluding the soldering parts as well as board background. We binarize the input image by use of HSI color model because it is difficult to discriminate the RGB colors between components and backgrounds. The linear combination of the binarized images then enhances the component window from the background. By use of the horizontal and vertical projection of histogram, we finally obtain the component widow. The experimental results are presented to verify the usefulness of the proposed method.

• 한국염색가공학회지
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• 제13권5호
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• pp.10-10
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• 2001

The Purpose of this study was to investigate spectrophotometric characteristics of Korean knotweed extracts. The properties were evaluated by it′s extracting solvent, effect of metallic ion, variations of pH values and effect of light exposure. The results were as following; The highest absorbance was found in methanol extract of Korean knotweed, while the lowest absorbance was carbon tetrachloride extract. The UV-vis. spectra of Korean knotweed colors in several solvents showed hypsochromic shift of n-π/sup ＊/ transition with the polarity of solvent. Absorbance and peak of UV-vis. spectra of Korean knotweed colors became lower and broader by addition of metallic ion. The light stability in irradiation with xenon ]amp of the color solution with Cu were higher than those of Al and Fe. The UV-vis. spectra of Korean knotweed extracts in various pH values showed bathochromic shift under alkaline condition, and their peaks disappeared after 5 hours exposure.