디지털 카메라의 캡쳐 프로그램에 따른 이미지 재현성에 관한 비교 연구

홍정의 ( Jeong Eui Hong ) 한국사진학회 2007 AURA Vol.0 No.17

Raw파일의 노출 조절에 따른 컨버팅 프로그램들의 이미지 재현적 특성에 관한 비교 연구

홍정의 ( Jeong Eui Hong ) 현대사진영상학회 2007 현대사진영상학회논문집 Vol.10 No.-

누룩과 입국의 종류를 달리한 식초의 품질 특성 비교 연구

홍정의(Jeong-Eui Hong),손은심(Eun-Shim Son),정철(Chul Cheong) 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.8

본 연구에서는 누룩과 입국의 종류를 달리하여 식초를 제조한 후 품질을 비교하였으며, 향후 이를 활용한 식초제조의 품질지표 기초자료로 활용하고자 하였다. 측정한 pH는 4.2~4.7로 차이가 없었지만 개량누룩이 4.20으로 가장 낮게 나타났다. 총 9종의 유기산이 검출되었으며, 유기산 중 젖산과 호박산이 시험구에 관계없이 높은 농도를 보였다. 식초의 향기성분을 분석한 결과 에스터의 경우 총 6개가 검출되었는데, 그중 에틸아세테이트(0.7~7.9 ppm)와 이소아밀아세테이트(1.9~4.0 ppm)가 모든 시험구에서 가장 많이 검출되었다. 고급 알코올류는 4종 검출되었고 총 고급 알코올 농도는 3.4~7.9 ppm을 보였다. 각 식초의 항산화 성분 함량 결과 ABTS+ 인 경우, 개량누룩이, DPPH의 경우, 진주곡자, 개량누룩 그리고 입국을 이용한 식초에서 유의적으로 높게 나타났다. 총 폴리페놀의 경우 개량누룩을 이용하여 제조한 식초에서 유의적으로 높게 나타났다. 관능검사 결과 단맛의 경우 입국이, 신맛의 경우 입국과 송학곡자, 산성누룩이, 감칠맛의 경우 개량누룩과 입국, 향의 경우 개량누룩과 홍국이 가장 높게 나타났다. 전반적인 기호도의 경우 개량누룩이 가장 높은 점수를 나타냈다. 이상의 결과에서 누룩과 입국의 7종류를 달리해서 제조한 식초 중에서 개량누룩을 사용한 식초는 저산도 식초로서 총 폴리페놀 함량이 많고 DPPH 라디칼 소거 활성 등 항산화 활성이 우수하여 국민건강 향상을 위한 새로운 기능성 식초로서 활용도가 높을 것으로 생각된다. The purpose of this study was to compare the different types and qualities of Nuruk and Koji, and the quality of the vinegar produced from them. The study intended to provide basic quality indicator data for vinegar production. The pH of cultured Nuruk was the highest and a total of 9 types of organic acids were detected. Among the organic acids, lactic acid and succinic acid showed high concentrations regardless of the test group . A total of 6 esters were detected when the fragrance component of vinegar was analyzed. Four higher alcohols were detected and the total higher alcohol concentration was 3.4~7.9 ppm. While analyzing the antioxidant content, ABTS+ was significantly higher in vinegar prepared using cultured Nuruk while DPPH was significantly higher in vinegar prepared using Jinjugokja, cultured Nuruk, and Koji. Total polyphenol content was significantly higher in vinegar prepared using cultured Nuruk. The highest scores were observed for Koji for sweet taste, for Koji, Songhakgokja, and Sanseong Nuruk for sour taste, cultured Nuruk, Koji for umami taste, cultured Nuruk, Hongguk for flavor, and cultured Nuruk had the highest score for overall preference. From the above results, among the 7 types of vinegar prepared, vinegar using cultured Nuruk is a low-acid vinegar, high in total polyphenol content, with excellent antioxidant characteristics such as DPPH radical scavenging activity. This may be termed as a new functional vinegar for improving national health and it can be expected that customer acceptance for this product will be high.

논문 : 디지털 카메라 이미지 센서의 구조에 따른 재현성 연구

홍정의 ( Jeong Eui Hong ) 한국사진학회 2006 AURA Vol.0 No.15

This study investigates into the image reproductivity of digital cameras, comparing the Bayer pattern, the type most widely used for image sensor, with the Foveon X3 type, developed by the Foveon Inc. to match the human sight mechanism, and the Super CCD Honeycom type of the Fuji Films. For analysis, Canon 1DS, Fuji S3 Pro, Kodak DCS Pro SLR/N, Nikon D200, and Sigma SD10 were chosen as research objects and KIIMA Image Evaluation Test Target (QA-3), Kodak Gray Scale (Large) Q-14, Macbeth Color Checker and Kodak Color Control Patches Q-14, and Kodak Gray Card / Black White Card, as model subjects, in order to determine their image sensor`s reproductivity, regarding color reproduction, resolution, sharpness, dynamic range, gradation, and latitude. To measure the spectral resolution, Kodak Wratten Gelatin Filter No. 29, 47, and 61 were used in order to attain the spectrum of a visible ray. For color reproduction, Imatest-1.6.16 is used. The result of this study showed that reproductivity for Super CCD Honeycom and Foveon X3 was not as good as expected, but showed possibilities for development. The old Bayer pattern also needed much improvement in reproductivity. It can be inferred that the merits and demerits of Super CCD Honeycom and Foveon X3 will be at least partly useful in developing digital camera`s productivity in the future.

신주거문화: 서울의 공동주택-아파트

홍정의 ( Jeong Eui Hong ) 한국다큐멘터리사진학회 2004 Viscom Vol.5 No.-

현 사진학계 지형에서 본 사진포털사이트의 필요성에 관한 연구

홍정의 ( Jeong Eui Hong ) 현대사진영상학회 2006 현대사진영상학회논문집 Vol.9 No.-

논문 : 디지털 카메라의 적외선 차단 필터에 관한 연구

홍정의 ( Jeong Eui Hong ) 한국사진학회 2006 AURA Vol.0 No.14

오토 화이트밸런스와 커스텀 화이트밸런스 설정에 따른 이미지 재현성에 관한 비교 연구

홍정의 ( Jeong Eui Hong ) 현대사진영상학회 2008 현대사진영상학회논문집 Vol.11 No.-

This study aims at offering some theoretical foundations and at helping choose the proper white balance setting, by comparing and analyzing the characteristics of the automatic white balance setting, with which digital cameras and RWA file converting programs are equipped, and the characteristics of the custom white balance setting, using a gray card, a white card, and etc. For this analysis, Kodak gray scale (large) Q-14, Kodak color control patches Q-14, Macbeth color checker, a Fotowand gray card, and a Fotowand white card were used, with automatic white balance setting and with custom white balance setting respectively, and also with the speed light of less color temperature changes. Also, the image reproducibility, such as the changes of image tone, color representation, chroma, noise density, and dynamic range, was analyzed through Photoshop CS3 and through Imatest-1.6.16. The analysis results showed that when the same algorism was applied to, it brought about various results, but some characteristics of each case and some minute comparative superiority of setting were found, while the products of one company had different features and it was difficult to find just one rule with one model. As for the color tone, generally, when a gray card was used and the coloration of neutral gray was reproduced nicely, the white color was represented with a warm feeling, and when a white card was used and the coloration of the white color was nice, the neutral gray was represented with a cold feeling. When a white card was set up, the error range of white balance was smallest, and therefore it would be much better to set up a white card to photograph a bright subject, in particular, such as a white background or an achromatic color. This study contributed to theorizing the mostly used settings through objective experiments, in spite of its limitation of the application of the same algorism.

서울안의 텃밭

홍정의 ( Jeong Eui Hong ) 현대사진영상학회 2004 현대사진영상학회논문집 Vol.7 No.-

자궁강내 인공수정에 의한 임신율

홍정의,이지삼,Hong, Jeong-Eui,Lee, Ji-Sam 대한생식의학회 1998 Clinical and Experimental Reproductive Medicine Vol.25 No.2

The effectiveness of intrauterine insemination (IUI) combined with controlled ovanan hyperstimulation (COH) in the treatment of infertility with various etiologies was compared in a total of 152 cycles. Patients received a maximum of three IUI cycles for the treatment. Severe male ($<2\times10^6$ motile sperm) or age factor (> 39 y) patients were excluded in this study. Pregnancy was classified as clinical if a gestational sac was seen on ultrasound. The overall clinical pregnancy rate was 7.9% per cycle (12/152) and 9.7% per patient (12/124). The pregnancy rates were 0% in unstimulated natural (0/18), 7.5% in CC (3/40), 8.2% in CC+hMG (4/49), 5.9% in GnRH-a ultrashort (1/17), 5.9% in GnRH-a long (1/17) and 27.3% in dual suppression cycles (3/11), respectively. The pregnancy rate was higher in dual suppression cycle than other stimulated cycles, but this was not significant. The multiple pregnancy rates were 25.0% (2 twins and 1 triplet). No patient developed ovarian hyperstimulation. Abortion rates were 66.7% in CC (2/3) and 100% in ultrashort cycles (1/1). The livebirth rate was 5.9% per cycle (9/152) and 7.3% per patient (9/124). There were no differences in age, duration of infertility, follicle size, total ampules of gonadotropins and days of stimulation between pregnant and non-pregnant groups. However, significant(P<0.05) differences were observed in the level of estradiol $(E_2)$ on the day of hCG injection ($3,266.6{\pm}214.2$ vs $2,202.7{\pm}139.4$ pg/ml) and total motile sperm count ($212.1{\pm}63.4$ vs $105.1{\pm}9.9\times10^6$) between pregnant group and non-pregnant group. These results suggest that IUI combined with successful ovarian stimulation tends to improve the chance of pregnancy as compared to IUI without COH and a total motile sperm count may be considered predictive of the success for pregnancy.