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은인기(Inki Eun),이관용(Kwanyong Lee) 한국정보과학회 2007 한국정보과학회 학술발표논문집 Vol.34 No.1C
본 논문은 신원확인 수단으로 부각되어 관심이 높은 홍채인식에 대한 연구이다. 홍채인식 시스템의 경우 홍채영역에 따라 각 영상들의 특징 값이 차지하는 비중이 서로 다르게 분포되어 있고 눈썹이나 조명에 의한 잡음으로 인하여 인식성능에 영향을 미친다. 이 경우 기존에 등록되어 인증된 사용자의 홍채 영상일지라도 제대로 인식하지 못하거나 인증에 실패할 수 있으며, 실세계에서의 홍채영역 사용이 원활하지 못하게 된다. 그러므로 단일 생체인식 시스템에서 홍채인식을 할 경우, 중요한 특징을 그대로 유지하고 인식성능을 향상시키기 위해서 정규화된 홍채 영상을 획득하여 전처리 과정을 거친 다음 홍채영역을 분할한 후 각 영역에 보정치를 적용한 특징추출 방법을 제안한다. 또한 웨이블릿 변환과 주성분 분석을 이용하여 인식성능이 개선된 특징추출 방법임을 보인다.
Poly(N,N-dimethlyaniline)가 코팅된 Boron doped diamond 전극을 이용한 신경전달 물질의 전기화학적 검출
조은인,황진희,박수길,Okajima, Takeyohi,Ohsaka, Takeo,Fujishima, Akira 한국공업화학회 2004 응용화학 Vol.8 No.1
The boron-doped conductive diamond electrode(BDD) was used as a working electrode for detection of serotonin, (5-hydroxytryptamine)(SE) in the presence of ascorbic acid(AA) which is mainly contained from vitamin C in human blood. In this study, the cationic polymer film of N,N-dimethylaniline (DMA) was electrochemically deposited on the BDD electrode surface to modify the characteristics of electrode. The PDMA film-coated BDD electrode can separate the oxidation potentials of AA and (SE) which coexist in a homogeneous solution. The selective detection of SE is achieved at the PDMA film-coated BDD electrode in the presence of AA.
심영지,박효진,김효정,조은인,양원모 全南大學校 師範大學 科學敎育硏究所 2016 科學敎育硏究誌 Vol.40 No.1
A yield and quality of tomato plants depends on the balance of growth and development. It is need the indicators for automatic image monitoring of tomato growth. This research was conducted to investigate a effective indicators for monitoring of tomato growth. The temperature are controlled 16 and 18, the drain quantity of nutrient solution 9700ml(week/8nozzle) and 14000ml(week/8nozzle). The leaf width and length at 18 are bigger than at 16. The brightness L and redness are low at 18than at 16, but yellowness b was high at 18. The difference of growth are bigger at 18 than 16. The color difference of leaflet E, L, a are higher in 2-3 cluster than 1, 4, 5 cluster, but color b is higher in nearest leaflet to stem apex. At the drain quantity of nutrient solution, 9700ml(week/8nozzle), a leaf width and length are small than at 14000ml(week/8nozzle), but is high the angle of leaflet. The leaf color did not differ significantly by the drain quantity of nutrient solution. The stem diameter was more affected by temperature, but the stem length was affected by the temperature and the quantity of nutrient solution supply. A fruit width and length were more affected by low temperature(16) than high temperature(18), and 9700ml(week/8nozzle) than 14000ml(week/8nozzle). The number of fruit were highest at 16 and 14000ml(week/8nozzle). In addition to leaf width, length, stem diameter and stem length, the angle and the color of leaflet are useful for indicators for automatic image monitoring of tomato growth, especially at the leaflet of 2-4 cluster below stem apex.