http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이채수,김경만,이철희,하영호,Lee, Chae-Soo,Kim, Kyeong-Man,Lee, Cheol-Hee,Ha, Yeong-Ho 대한전자공학회 1998 電子工學會論文誌, S Vol.s35 No.6
최근에 영상 처리 시스템에서 칼라 데이타의 사용이 급격히 증가하고 있다. 그러나 색 재현 능력의 차이가 있고 각 장치마다 고유의 색좌표계를 사용하므로 서로 다른 장치사이에서 색 재현시에는 좌표계 변환이 요구된다. 특히 색재현 범위가 좁은 프린터에서 자연색을 출력하기 위해서는 색역 사상과 주어진 색역 계조의 범위를 확장할 수 있는 디더링 과정이 필요하다. 본 논문에서는 색역 사상을 위하여 각 장비의 출력 특성을 고려한 비선형 사상 함수를 획득하여 이를 기반으로 하여 장비들간의 색역 일치를 이루었다. 디더링 과정에서는 채색시 발생하는 중복 면적의 특성을 고려하여 양자화 단계를 확장하는 비선형 순서 디더링과 오차 확산 방법에서 발생하는 경계 부분의 문드러짐과 인접색의 변형을 줄일 수 있는 변형된 오차 확산 방법을 제안한다. Recently many devices print electronic images in a variety of ways. The reproduced color, however, is different from the original color because of the difference of hardware characteristics. To maintain device independent color, gamut mapping method is proposed. The proposed color gamut mapping uses nonlinear intensity mapping and clipping for saturation mapping on HSI color space. In the dithering operation, expanded nonlinear ordered dithering and modified error diffusion are proposed. The proposed ordered dithering uses expanded nonlinear quantization which considers overlapping phenomena of neighbored printing dots. In the modified error diffusion, quantization errors to be diffused are adjusted to improve both image blur and color change produced in the error diffusion. So, the printed image is similar to the image of monitor. Our results indicate that proposed algorithm can produce high quality image in the low bit color devices.
순산소 연소 기술 실증을 위한 영동 1 호기 보일러 개조 타당성 연구
이채수(Lee Chae Soo),김혁필(Kim Hyeok Pill),김상욱(Kim Sang Wook) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
125MWe Young Dong Unit 1 power station that has been firing low volatile anthracite coal for a number of years requires an upgrade or replacement for converting to bituminous and sub-bituminous coal and also for introducing an Oxy-PC firing demonstration capability for a period of approximately one year. The key object of this study is a selection of either a replacement boiler or a retrofit conversion of the existing down shot furnace to fire on oxygen or air. Four cases are proposed and evaluated on the ground of the collected data from site survey. The retrofit case of existing down-shot furnace and boiler pressure parts with new circular register burners in the lower furnace front and rear walls represents the optimum solution in terms of economic and technical performance for both air and oxy firing condition. The recommended case will be applied to FEED(Front End Engineering Design) study for the existing Young Dong Unit 1 boiler retrofit
시각적 색일치를 위한 확장된 비선형 양자화와 색역매핑을 이용한 칼라 프린팅
이채수 ( Chae Soo Lee ),김경만 ( Kyung Man Kim ),이철희 ( Cheol Hee Lee ),하영호 ( Yeong Ho Ha ) 한국감성과학회 1997 연차 학술대회 논문집 Vol.1997 No.-
Recntly many devics print electronic images in a variety of ways. But the reproduced color is difference of hardware cjaracteristics. To maintain device independent color, gamut mapping method and expanded nonlinear quantization are proposed. The color gamut mapping uses nonlinear intensity mapping and clipping for saturation mapping of HSI color space. Dithering operation for printing uses expanded nonlinear quantization which considers overlapping phenomena of neighboring printing dots. So the printed image is similar to the image of monitor and can produce high quality image in the low bit color devices.
이채수(Lee Chae Soo),최영준(Choi Young Jun),김현기(Kim Hyun Gee),양옥철(Yang Ok Chul),정재헌(Chong Chae Hon) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
The once-through heat recovery steam generator is ideally matched to very high temperature and pressure, well into the supercritical range. Moreover this type of boiler is structurally simpler than drum type boiler. In drum type boiler, each tube play a well-defined role: water preheating, vaporization, superheating. Empirical equations are available to predict the average heat transfer coefficient for each regime. For once-through heat recovery steam generator, this is no more the case and mathematical models have to be adapted to account for the disappearance of drum type economizer, boiler, superheater. General equations have to be used for each tube of boiler, and actual heat transfer condition in each tube has to be identified.
휘도값 변화에 기초하여 가변하는 앵커점을 이용한 영상 의존 색역 사상 방법
김신동,김경만,이채수,이철희,하영호,Kim, Shin-Dong,Kim, Kyeong-Man,Lee, Chae-Soo,Lee, Cheol-Hee,Ha, Yeong-Ho 대한전자공학회 1999 電子工學會論文誌, S Vol.s36 No.1
현재 많은 칼라 장치는 다양한 방법으로 영상을 재현한다. 그러나 장치마다 재현된 색은 장치 사이의 색역차로 인해 원래의 색과 많은 차이로 보인다. 본 논문에서는 서로 다른 장치에서 동일한 색을 재현할 때 발생하는 색의 오차를 줄이기 위해 영상 의존 색역 사상 방벙을 제안하였다. 이 방법은 색역 사상시 휘도값 변화에 의해 일어나는 휘도값 변화를 보상하면서 채도값을 클리핑한다. 색역 사상시 중심점인 앵커점을 기존의 방법보다 낮게 설정함으로써 원 영상과 재현된 영상 사이에서의 색 오차를 줄였다. 또, 사상된 영상을 색대비를 높이기 위해 프린터 색역을 밝은 영역과 어두운 영역으로 나누어 다른 사상 방법을 사용하였다. 결과적으로 모니터에 나타난 영상의 색과 비슷하고 대비가 높은 영상을 프린터로 재현할 수 있었다. Currently many devices reproduce electronic images in the various ways. However the color that is reproduced in any device is different from the original color due to the difference in the gamut between devices. In this paper, an image dependent gamut mapping method is proposed. This method clips the chroma with compensating for the change of lightness caused by the lightness scaling. The anchor point, which is the center point in the mapping, is set as a lower point by the proposed method than a point by the conventional mapping method. This reduces the color difference between point. In addition, to heighten the color contrast on the constant hue, the different two mapping methods are applied to the printer gamut which is divided in two region, bright region and dark region. Consequently, the printer output image was highly consistent with the corresponding monitor image.
Wi-Fi Direct 망을 위한 부하량 예측 기반의 전력 절감 기법
유홍석,박양우,이채수,윤태진,Yoo, Hongseok,Park, Yang-Woo,Lee, Chae-Soo,Yun, Tae-Jin 대한임베디드공학회 2015 대한임베디드공학회논문지 Vol.10 No.4
Wi-Fi Direct allows battery powered mobile devices to form a wireless ad hoc network. Since one member of the network called Group Owner (GO) takes the role of managing the network, the network lifetime is mainly affected by the energy efficiency of GO. Hence, Wi-Fi Direct defines power saving schemes that allow GO to save the energy by turning off its radio interface during the periods called absence periods. However, the Wi-Fi Direct specification does not specify how to set parameters (denoted by PS parameters) determining the schedule of the absence periods. In this paper, we therefore propose a novel traffic-aware power saving scheme for Wi-Fi Direct networks. In particular, the proposed scheme estimates the application-level traffic load and adaptively tunes the PS parameters according to the estimated value.