• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2009년도 학술대회
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• pp.547-551
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• 2009

최근, 필름복원은 다양한 멀티미디어 출현과 영상보존의 중요성으로 많은 연구자들로부터 관심을 받고 있다. 블로치(blotch)는 오래된 영상에서 나타나는 대표적인 손상요인이다. 따라서 본 논문에서는 객체의 컬러특징과 방향분포 변화를 이용한 블로치 검출방법을 제안한다. 제안된 방법은 두가지 모듈로 구성 된다. 블로치의 불연속적인 특징을 이용한 SROD 검출기로 불로치의 후보지를 검출하고, 후보지로부터 블로치의 컬러와 형태 특징을 이용한 신경망으로 블로치 영역을 검출한다. 제안된 방법을 평가 하기 위해 실제 오래된 영상으로부터 실험 하였다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2001년도 가을 학술발표회 논문집
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• pp.815-820
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• 2001

This study is to set a new standard for using of the colorimetric method through grasping the character of the colorimetric method, and measuring the chloride concentration at the place of the change of color. Also, to predict chloride concentration around rebar and time reaching limit chloride concentration through measuring the chloride concentration of concrete surface by the colorimetric method and this study presents the new program of concrete degradation and diagnosis of the durability by salt damage. First the use of the colorimetric method was examinated, second the chloride concentration through slicing concrete submerged in artificial seawater for 6 months was measured. And the chloride concentration at the place of the change of color was calculated by using colorimetric method. Finally, the cloride concentration of the concrete surface was calculated.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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• pp.1550-1551
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• 2005

In this paper, to improve the well-known photo conductivity degradation of amorphous silicon, a new LASER immersion treatment has been applied. The optical feedback control LED backlighting system with integrated LCD panel sensor increased the color variation less than 0.008 ${\Delta}u'v'$ compared to 0.025 for a non-feedback system.

• 대한전자공학회논문지SP
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• 제41권5호
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• pp.143-152
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• 2004

본 논문에서는 칼라영상 각 채널에 대한 인간시각 특성이 다르다는 것을 이용하여, 워터마킹의 강인성과 화질열화에 중요한 영향을 미치는 Scaling값을 구하는 알고리듬을 제안한다. 또한, 칼라영상이 다채널 영상임을 이용하여, 상관도와 임계값의 차이가 최대가 되는 경우를 선택하여 워터마크를 삽입하는 선택적 워터마킹 알고리듬을 제안한다. 제안된 알고리듬을 통하여 동일한 화질열화의 조건 아래에서 보다 향상된 강인성을 얻을 수 있다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 컴퓨터소사이어티 추계학술대회논문집
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• pp.157-160
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• 2003

Recently, several steganographic algorithms for two-color binary images have been proposed. In this paper, we propose a steganographic algorithm which embeds a secret message into bitmap images and palette-based images. To embed a message, the suggested algorithm divides a bitmap image into bit-plane images from LSB-plane to MSB-plane for each pixel, and considers each bit-plane image as a binary one. The algorithm splits each bit-plane image into m$\times$n blocks. and embeds a r-bit(r=[log$_2$(mn+1]-1) message into the block. And our schemes embed a message to every bit-plane from LSB to MSB to maximize the amount of embedded message and to minimize the degradation. The schemes change at most two pixels in each block. Therefore, the maximal color changes of the new algorithm are much smaller than other bit-plane embedding schemes' such as the substantial substitution schemes.

• 한국물환경학회지
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• 제22권2호
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• pp.333-341
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• 2006

The concept for the decolorization in biological dye wastewater treatment systems is based on anaerobic treatment, for the reductive cleavage of the dyes' azo linkages, in combination with aerobic treatment, for the degradation of the products from azo dye cleavage, aromatic amines. Batch tests were conducted to examine the conditions and the factors affecting biological treatment of dye wastewater. From the tests, the removal efficiencies of organics and colors of dyeing wastewater were improved to $COD_{Cr}$ 27% and color 9% by injecting 10% of the domestic wastewater as a cosubstrate, and $COD_{Cr}$ 30%, color 22% with 30% injection of domestic wastewater. Therefore it was proved that decolorization efficiency is demonstrated with domestic wastewater as a cosubstrate. The analysis of aromatic amines in wastewater showed that decolorization was achieved by cometabolism while aromatic amines were produced by cleavage of azo bonds under anaerobic conditions and these products were removed in an aerobic tank subsequently.

• 한국염색가공학회지
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• 제8권5호
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• pp.17-24
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• 1996

Dye solutions were tested in order to find the optimal condition of ozonation and determine the progress of degradation, i.e., change of the parameters characterizing the dye solutions. From the results of our experiment we can conclude that almost all of the color was removed within a 10 minute time period. An ozone oxidation results in the effective removal of COD(60%). but the elimination of the total organic carbon(TOC) was not successful, only about 15~40% of TOC was removed from dyeing wastewater in 30 minutes. The color removal is much effective in using ozonation method.

• 대한환경공학회지
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• 제32권5호
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• pp.509-516
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• 2010

토양으로부터 농화배양된 두 미생물 군집의 디젤 분해 특성과 미생물의 군집 양상을 살펴보았다. 간균 형태를 띄는 두 군집은 육안으로 뚜렷히 구별되는 황색(YE-5)과 투명한 형태(WH-5)의 콜로니를 형성하였으며 1% 디젤 오염된 배지에서 26일간 배양하였을 때 디젤 분해율은 99.07 mg-Diesel/$L{\cdot}day$와 57.82 mg-Diesel/$L{\cdot}day$로 YE-5가 약 1.7배정도의 빠른 분해속도를 나타내었다. YE-5에 의한 디젤의 분해양상은 $C_8-C_{24}$ 전반에 걸쳐고르게 분해되는 양상을 보여주었다. PCR-DGGE 기법을 이용하여 YE-5를 동정한 결과 Psedomonas, Klebsiella, Escherichia, Stenotrophomonas 등이 관찰 되었으며 모두 단백세균에 속하는 것으로 분석 되었고 YE-5에서만 Uncultured Stenotrophomonas sp.가 관찰되었다. 본 실험을 통해 디젤의 효과적 분해를 위해 적절한 군집의 조합이 필요하다는 것을 알 수 있었으며 Escherichia hermannii나 Uncultured Stenotrophomonas sp.와 같은 기 보고되지 않은 종들이 디젤 분해에 미치는 영향에 관한 후속연구가 필요할 것으로 판단하였다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 신호처리소사이어티 추계학술대회 논문집
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• pp.129-132
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• 2003

Fixed GOP allocation in MPEG-2 cannot cope with scene change and amount of motion, which results in degradation picture quality. By finding suitable N and M and allocating dynamic GOP, the improvement of picture quality can be achieved. In this paper, N and M are determined by scene change detection and estimation of amount of motion using color histogram per each macroblock. The simulation results show that the average PSNR is improved, especially around the shot boundaries.

• 한국식품조리과학회:학술대회논문집
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• 한국식품조리과학회 2004년도 학술대회
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• pp.125-125
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• 2004