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김재해,이성형,조가람,구철회,Kim, Jae-Hae,Lee, Sung-Hyung,Cho, Ga-Ram,Koo, Chul-Whoi 한국인쇄학회 2006 한국인쇄학회지 Vol.24 No.1
Color reproduction is one of the most important expression factors in digital printing. In this paper, an experiment was done where the characteristics of color reproduction in digital printing. The results could summarized as follows. The printing used device profile showed a color difference of less than printing used default value in digital printing. As a result of weighting color difference, a difference between color gamut of digital original and color gamut of printing, when transforming the RGB color space to CMY color space, a exclusion the gray revision. The solution is to optimize the color transformation by gamut mapping and gray revision.
전자출판에서 입.출력 장치의 컬러 관리에 관한 연구 (I)
조가람,김재해,구철회,Cho, Ga-Ram,Kim, Jae-Hae,Koo, Chul-Whoi 한국인쇄학회 2007 한국인쇄학회지 Vol.25 No.1
In this paper, an experiment was done where the input device used the linear multiple regression and the sRGB color space to perform a color transformation. The output device used the GOG, GOGO and sRGB for the color transformation. After the input device underwent a color transformation, a $3\;{\times}\;20\;size$ matrix was used in a linear multiple regression and the scanner's color representation of scanner was better than a digital still camera's color representation. When using the sRGB color space, the original copy and the output copy had a color difference of 11. Therefore it was more efficient to use the linear multiple regression method than using the sRGB color space. After the input device underwent a color transformation, the additivity of the LCD monitor's R, G and B signal value improved and therefore the error in the linear formula transformation decreased. From this change, the LCD monitor with the GOG model applied to the color transformation became better than LCD monitors with other models applied to the color transformation. Also, the color difference varied more than 11 from the original target in CRT and LCD monitors when a sRGB color transformation was done in restricted conditions.
국가직무능력표준(NCS) 기반 인쇄분야 국가기술자격 설계 방안
윤종학,김재해,소기호,박계영 한국인쇄학회 2017 한국인쇄학회지 Vol.32 No.1
This study is briefed the national competency standards(NCS) which developed through occupational map analysis in printing fields and the national technical qualifications which were Engineer Printing, Industrial Engineer Printing and Craftsman Printing. And the question for skill test of printing fields was developed by comparing NCS and guideline for question-making. Finally the new system of technical qualification based on printing NCS was designed.