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심성균,정원용 경남대학교 공업기술연구소 2001 硏究論文集 Vol.19 No.-
본 논문에서는 차량번호판 인식시스템의 성능을 최대화 하기 위해 충격잡음과 가우시안 잡음으로 인해 손상된 입력영상을 중간값 필터와 형태학 필터를 이용하여 개선하는 방법을 제안하였다. 실험에서 각 필터를 적용한 결과를 PSNR을 통하여 비교하였고, 인식결과와 학습 기대값 사이의 MSE를 측정함으로서 인식시스템의 성능을 비교하였다. 실험결과 손상된 차량번호판의 입력영상은 최대 3.7dB까지 개선되었으며, 인식시스템의 성능 평균 MSE는 약 1.84×10-3 로 원활한 인식이 이루어짐을 확인하였다. In the paper we propose a method which makes the performances of the vehicles plate recognition system better for the impulse or gaussian contaminated images using the median and morphological filters. Comparing the PSNR and MSE of the experimental results, PSNR has been improved to 3.7dB maximally and the average MSE is 1.84 ×10-3.
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Genesis 영상처리 보드를 이용한 의용 영상 실시간 에지 검출
심성균,정원영,이영철 경남대학교 공업기술연구소 2000 硏究論文集 Vol.18 No.-
인터넷과 전자산업기술의 발달로 영상의 획득과 처리를 동시에 수행하는 실시간 처리 기술이 용이하게 되었다. 본 논문에서는 심장혈관의 위치, 모양, 크기 등의 정보를 우리에게 알려주는 의용 영상의 에지검출에 Genesis 보드와 이를 제어하는 MIL 패키지를 사용하여 실시간 개념을 적용한 실험을 구현해 보았으며, 획득한 영상에 적용한 마스크의 크기에 따른 영상처리 속도와 실시간 개념에 맞는 최대 제한 속도를 조사해 보았다. The development of electronics and internet technologies is enable to perform of real-time image acquisition, processing, and transmission almost simultaneously. In the paper, real-time edge detection of the medical coronary angiograms image was accomplished by making use of the Genesis H/W board and the MIL(Matrox Image Library) S/W package. The comparison of the processing time for the various mask to detect the edges of the given image shows the determination about the limited mask size under the real-time processing environment.
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황종하,심성신,석예선,이항영,송해룡,이재관,박용균,이향영,김봉희 대한의학회 2009 Journal of Korean medical science Vol.24 No.4
Mesenchymal stem cells (MSCs) are capable of self-renewal and differentiation into lineages of mesenchymal tissues that are currently under investigation for a variety of therapeutic applications. The purpose of this study was to compare cytokine gene expression in MSCs from human placenta, cord blood (CB) and bone marrow (BM). The cytokine expression profiles of MSCs from BM, CB and placenta (amnion, decidua) were compared by proteome profiler array analysis. The cytokines that were expressed differently, in each type of MSC, were analyzed by real-time PCR. We evaluated 36 cytokines. Most types of MSCs had a common expression pattern including MIF (GIF, DER6), IL-8 (CXCL8), Serpin E1 (PAI-1), GROα(CXCL1), and IL-6. MCP-1, however, was expressed in both the MSCs from the BM and the amnion. sICAM-1 was expressed in both the amnion and decidua MSCs. SDF-1 was expressed only in the BM MSCs. Real-time PCR demonstrated the expression of the cytokines in each of the MSCs. The MSCs from bone marrow, placenta (amnion and decidua) and cord blood expressed the cytokines differently. These results suggest that cytokine induction and signal transduction are different in MSCs from different tissues.
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Interobserver agreement on the diagnosis of carotid artery calcifications on panoramic radiographs
윤숙자,심성균,이재서,강병철,임회정,김민석,김선헌 대한영상치의학회 2014 Imaging Science in Dentistry Vol.44 No.2
Purpose: This study was performed to investigate the interobserver agreement on the detection of carotid artery calcifications on panoramic radiographs. Materials and Methods: This study consisted of panoramic radiographs acquired from 634 male patients of the age of 50 years or older. Having excluded carotids of no diagnostic quality, 1008 carotids from the panoramic radiographs of the patients were interpreted by two oral and maxillofacial radiologists independently for the presence of carotid artery calcifications. Statistical analysis was used to calculate the interobserver agreement. Results: Interobserver agreement was obtained for 932 carotids (92.4%). Inconsistent interpretation of 76 carotids (7.5%) between the two observers was found. Cohen’s kappa value was 0.688 (p<0.001). Conclusion: The probability of a match between the two observers was substantially high. Conclusion: The probability of a match between the two observers was substantially high. Purpose: This study was performed to investigate the interobserver agreement on the detection of carotid artery calcifications on panoramic radiographs. Materials and Methods: This study consisted of panoramic radiographs acquired from 634 male patients of the age of 50 years or older. Having excluded carotids of no diagnostic quality, 1008 carotids from the panoramic radiographs of the patients were interpreted by two oral and maxillofacial radiologists independently for the presence of carotid artery calcifications. Statistical analysis was used to calculate the interobserver agreement. Results: Interobserver agreement was obtained for 932 carotids (92.4%). Inconsistent interpretation of 76 carotids (7.5%) between the two observers was found. Cohen’s kappa value was 0.688 (p<0.001). Conclusion: The probability of a match between the two observers was substantially high.
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