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김단환,정기봉,오무송 조선대학교 전자정보통신연구소 2002 電子情報通信硏究所論文誌 Vol.5 No.2
In general cases, the conventional internet connected to a terrestrial network is transmit too large medical images. To overcome this low speed transmitting rate problem of the internet, we have studied about an image division communication system as a fast telemedicine system. The Image division communication system was 5 10 times faster than the conventional terrestrial internet link. Also, we have developed a Web-based telemedicine system that can access every permitted server of hospital via the internet. Studied image division communication corrected problem of other reflex quality decline in erratic transmission of reflex by transmission speed imbalance that is problem of single communication techniques that used in existing reflex transmission. Also, could keep quality state of fixed reflex gouge abnormal transmission speed. Visual Basic and C++, ASP programming techniques were used to make our system and it can access and retrieve medical information and image through only public web browse such as internet explorer without additional specific tools. To increase the transmitting speed of our telemedicine system, JPEG method was used. In conclusion, we were able to develop a fast and public telemedicine system using the proposed image division communication system and Web technology. Image division communication system technology increased the speed of the conventional internet and Web technology extended the scope of use for telemedicine system from intrahospital to public us.
최우진,김단환,정기봉,오무송 조선대학교 전자정보통신연구소 2002 電子情報通信硏究所論文誌 Vol.5 No.1
Multimedia information includes image information, sound information, character information and various informations. Difficulty follows to look for image which user wants by existent retrieval method. Therefore, introduce MSE(Mean Square Error) by index method for efficient practical use of video information in this research and propose scene change detection retrieval method of video. This image data for diagonal line direction color value of schedule pixel draw, (By j^(*)i matrix to Matrix A, i is frame number, j stored cost that express diagonal line Image height of frame to Matrix A). So that can grasp whole structure of video, do sampling in still image, Made user can grasp whole structure of video, do sampling in still image. Made user grasp scene change point of total video on one eye. If MSE of each frame exceeds critical value, search the frame by scene change.
Jung-Hwan Yoon,Young-Nam Kim,Dan-Bi Lee,Kwon-Rae Kim,Won-Il Kim,Kye-Hoon Kim 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.6
This study aimed to investigate correlations between concentrations of extractable Arsenic (As) with varying chemical solutions (0.1 M Ca(NO3)2, 0.1 M (NH4)2HPO4, 0.5 M EDTA, Mehlich 3, and 0.5 M NaHCO3) and those of As in crops, and then to seek the most suitable soil extraction method for predicting the potential of As uptake in crops cultivated in soils contaminated with As. For a mesocosm experiment, pepper (Capsicum annuum L.), soybean (Glycine max L.), and rice (Oryza sativa L.) were cultivated for three months in pots containing soils taken from the arable areas near abandoned mines in Korea. Following the cultivation, soil pH and DOC significantly increased by treatments of lime and lime plus compost, respectively, while insignificant influences in changing total and all extractable As concentrations were found in all soils. Arsenic concentration in edible part of all crops considerably depended on the extractable As concentration in the soils, particularly with Mehlich 3. All extractable As concentrations in the soils of C. annuum and G. max were significantly correlated with As concentration in their edible parts. For O. sativa, the extractable concentrations of Mehlich 3 (R2: 0.18 at p: 0.006) and EDTA (R2: 0.11 at p: 0.036) showed only marked relationships with As concentration in the edible part. These results may indicate that the Mehlich 3 and EDTA are soil extractants to determine phytoavailable As in soil that provide better prediction for As transfer from soil to crop.
MSE를 이용한 영상의 점진적 장면전환 검출에 관한 연구
김단환(Dan-Hwan Kim),김형균(Hyeng-Gyun Kim),정기봉(Ki-Bong Joung),신충호(Choong-Ho Sin),김재석(Jae-Seog Kim),오무송(Moo-Song Oh) 한국정보과학회 2001 한국정보과학회 학술발표논문집 Vol.28 No.1B
대용량의 동영상 데이터 이용에 있어 효과적인 동영상 검색을 위해서는 동영상 데이터의 색인과정이 필요하다. 본 논문은 AVI영상에서 동영상 장면 전환점 검출에 관한 효과적인 방법을 제안한다. 제안된 방법은 프레임을 대각선 방향의 픽셀 값을 추출하고 정지 영상으로 변환하여 동영상의 전체 구조를 파악할 수 있으며, 장면 전환점을 한눈에 확인할 수 있다. 각각의 프레임에서 추출한 픽셀의 칼라 값을 A행렬 i(프레임 수)×j(프레임 영상 높이)로 저장하고, MSE(Mean Square Error)를 용해서 일정의 임계값에 도달하지 못할 경우 이 프레임을 장면 전환점으로 검출한다.