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소형 표적 검출을 위한 스텝 크기 인덱스 및 서브 샘플링 마스크를 이용한 새로운 이차원 LMS (TDLMS)
김병익(Byoung-Ik Kim),이승익(Seung-Ik Lee),김덕규(Duk-Gyoo Kim) 한국정보기술학회 2010 한국정보기술학회논문지 Vol.8 No.2
In this paper, we propose a novel TDLMS filter using a sub-sampling mask and step size index for small target detection within infra-red (IR) imagery. A filter structure of TDLMS that can efficiently detect a small target in IR imagery is proposed. The concept of the proposed filter is to utilize the sub-sampling mask of the weight matrix and step size index having the structure reducing effects of the target pixels in order to predict exactly the background. The nonlinear step size utilizing the luminance rate (LR) and the contrast rate (CR) is used and then background estimation is calculated finally by using the two-dimensional Gaussian distance (TDGD). Experimental results show that the proposed method exhibits higher detection rates and lower false alarm rates in comparison to the conventional TDLMS filter.
스마트 에어백을 위한 거리 센서 융합 기술을 이용한 승객 감지 시스템
김병익(Byoung-Ik Kim),최원형(Won-Hyung Choi),배태욱(Tae-Wuk Bae),김영춘(Young-Choon Kim),안상호(Sang-Ho Ahn),김덕규(Duk-Gyoo Kim) 한국정보기술학회 2012 한국정보기술학회논문지 Vol.10 No.5
In this paper, we propose an occupant sensing system using a sensor fusion composing of pyroelectric infrared (PIR) sensor, ultrasonic distance (USD) sensor and infrared distance (IRD) sensor for a smart airbag. This sensor fusion system is used for realtime detection of position and body classification of occupants. The PIR sensor and USD sensor are located in front of an occupant in a vehicle jig. The IRD sensor array consisting of 9 IRD sensors is placed on top of an occupant. The PIR sensor is used to check the existence of the occupant and whether it is animate or inanimate objects. And the USD sensor and IRD sensor array recognize the position of the occupant. By using this sensor fusion system within a vehicles jig, the proposed system is experimentally evaluated in viewpoint of an realtime occupant detection performance. Through experimental results, we confirm that the proposed sensor fusion system can be applied to future smart airbag system.
적외선 영상에서 다층 구조 요소 NWTH 변환을 이용한 소형 표적 검출 방법
김병익(Byoung-Ik Kim),배태욱(Tae-Wuk Bae),김영춘(Young-Choon Kim),안상호(Sang-Ho Ahn),김덕규(Duk-Gyoo Kim) 한국정보기술학회 2011 한국정보기술학회논문지 Vol.9 No.7
In this paper, we propose a small target detection method using multi-structuring element new white top-hat (NWTH) transformation in the infrared (IR) images. The white top-hat (WTH) transformation has not effective performance in case of dim targets in IR images with many clutters. Because the NWTH transformation uses structuring elements considering target region and background region, the NWTH transformation is superior than the WTH transformation in viewpoint of target enhancement. But the performance of NWTH transformation depends on size of structuring element. To solve this detect in top-hat based transformations, a automatic decision method of structuring element is needed. Because this selection standard of structuring element must be objective and adaptive in various IR images, that is performed by candidate target-to-clutter ratio gain (CTCRG). The proposed method decides multi-structuring element by using the CTCRG and its recursive method in the NWTH transformation. And then small targets can be detected through a sum image of the NWTH transformation images by multi-structuring element. We confirmed that the proposed method has superior image enhancement performance in target region, compared with existing WTH and NWTH transformation.
처방전달체계에 대한 사용자 만족도에 영향을 미치는 요인
김창엽,하범만,강길원,김병익,김용익,이진석,Kim, Chang-Yup,Ha, Bum-Man,Kang, Gil-Won,Kim, Byoung-Yik,Kim, Yong-Ik,Lee, Jin-Seok 대한예방의학회 2000 예방의학회지 Vol.33 No.4
Objectives : To identify the factors affecting users' satisfaction with the Order Communicating System(OCS) and to highlight the factors important for the successful establishment of OCS. Methods : A Users Satisfaction survey was sent to 4,513 people, consisting of 1,503 doctors, 2,379 nurses, 255 pharmacists and 370 administrative workers in 16 hospitals which had introduced OCS. The response rate was 63.9%. Measurement of users' satisfaction was peformed with the instrument which was used in Doll's study. Some aspects of Doll's instrument were adjusted according to the aims of this study. The classifying sections of this survey included age, job and status classification, computer experience, OCS education, duration of daily OCS use, type of order entering, number of personnel in the Hospital Information System's department, cost of OCS, problem frequency, proportion of work managed by hand, OCS type, and Hospital establishment type. Results : There was a positive correlation between satisfaction level and managerial status throughout all job classifications. Irrespective of the importance of OCS education as a factor relating to users' satisfaction, the additional work load caused by OCS lowered users' satisfaction. Different factors affected users' satisfaction according to job and status classification. The composition of factors affecting the pharmacist and administrative worker satisfaction levels was simpler than that of the doctor and nurse levels. There were no statistically significant differences between the actual computer experience duration of daily OCS use and users' satisfaction with OCS. Conclusions : There was an understandable relationship between users' attitude to OCS and factors affecting users' satisfaction. The results of this study could be used as a basis for the successful expansion of the operation of OCS. But more detailed studies on users' satisfaction and further improvements of methodologies are required for the successful establishment of OCS.
몇가지 간질환에 있어 혈중 Neopterin 치의 의의
정을순(Eul Soon Chung),이상종(Sang Jong Lee),김향(Hyang Kim),손호선(Ho Sun Son),김병익(Byoung Ik Kim),백문철(Moon Chul Baek),이승세(Seung Se Lee) 대한소화기학회 1989 대한소화기학회지 Vol.21 No.2
N/A It was recently observed that the hyperimmune response in vitro as in vivo was always accompanied by high levels of neopterin. Indeed in vitro, the stimulation of lymphocytes or macrophages either with viral alloantigens or with chemically modified autologous cells induces a remarkable release of this substance by means of the gamma interferon induction. In the viral infections the increased levels of neopterin could be due to the direct stimulation by the virus on the nucleic acid of the hosts cell (wacher et al ; 1957) Our aim was to verify if during fatty liver or hepatitis, and in cirrhosis of the liver there could be significant variation of serum neopterin levels. We studied 75 patients suffering from hepatic diseases, ranging between 22 and 84 year (mean age 48.96+14.2) and 20 healthy controls homogeneous for sex and age to our patients. The mean values of serum neopterin were 2.17+0.94 ng/ml in patients and 1.59+0.35 ng/ml in the control group. These data was correlated with the mean values of both SGOT and SGPT that were 152.25+278.61 IU/L, 204+405.94 IU/ respectively, and the statistical study showed positive but low correlation coefficient (SGOT:r = 0.28, p<0.05; SGPT:r = 0.30, p<0,05). There was no significant difference of serum neopterin levels between patients with fatty liver and control group (t = 1.057, p>0.05). However, the statistical study showed a significant difference between hepatitis, cirhosis of the liver and the normal control group(p<0.05). Serum neopterin levels and triglycerides were shown to be the best variables for discriminating between the hepatitis and fatty liver patients, neopterin being the more specific of the two. No significant correlation of serum neopterin levels between B hepatitis and non B hepatopathies could be found.