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이병룡(Byung-Ryong Lee),Quoc Bao Truong,김형석(Hyoung-Seok Kim),배용환(Yong-Hwan Bae) 제어로봇시스템학회 2011 제어·로봇·시스템학회 논문지 Vol.17 No.5
In this paper, we present a two-stage vision-based approach to detect multi views of pedestrian in road scene images. The first stage is HG (Hypothesis Generation), in which potential pedestrian are hypothesized. During the hypothesis generation step, we use a vertical, horizontal edge map, and different colors between road background and pedestrian’s clothes to determine the leg position of pedestrian, then a novel symmetry peaks processing is performed to define how many pedestrians is covered in one potential candidate region. Finally, the real candidate region where pedestrian exists will be constructed. The second stage is HV (Hypothesis Verification). In this stage, all hypotheses are verified by Support Vector Machine for classification, which is robust for multi views of pedestrian detection and recognition problems.
유전자알고리즘을 이용한 영상분할 문턱값의 자동선정에 관한 연구
이병룡(Byung-Ryong Lee),Quoc Bao Truong,Van Huy Pham,김형석(Hyoung-Seok Kim) 제어로봇시스템학회 2011 제어·로봇·시스템학회 논문지 Vol.17 No.6
In this paper, we focus on the issue of automatic selection for multi-level threshold, and we greatly improve the efficiency of Otsu’s method for image segmentation based on genetic algorithm. We have investigated and evaluated the performance of the Otsu and Valley-emphasis threshold methods. Based on this observation we propose a method for automatic threshold method that segments an image into more than two regions with high performance and processing in real-time. Our paper introduced new peak detection, combines with evolution algorithm using MAGA (Modified Adaptive Genetic Algorithm) and HCA (Hill Climbing Algorithm), to find the best threshold automatically, accurately, and quickly. The experimental results show that the proposed evolutionary algorithm achieves a satisfactory segmentation effect and that the processing time can be greatly reduced when the number of thresholds increases.
아가로스 겔에 포함된 세포의 농도가 확산 계수에 미치는 영향 측정
이병룡(Byung Ryong Lee),진송완(Songwan Jin) 한국가시화정보학회 2013 한국가시화정보학회지 Vol.11 No.1
In this study, diffusion coefficients of 20 kDa FITC-dextran in 2% agarose gel with different cell concentrations were measured using fiberoptic-based fluorescence recovery after photobleaching technique. As increasing cell concentration suspended in agarose gel, the diffusion coefficients were decreased. The diffusion coefficient of agarose gel which contains 10×106 cells/ml was decreased to 11% that of in agarose gel without cells. The distribution of fluorescence dye in 3D scaffold was also simulated. The simulation result shows that the diffusion coefficient is more significant factor than the scaffold structure.