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이상설(Sang-Seol Lee),정성태(Sung-Tae Jung),강선경(Sun-Kyung Kang) 한국컴퓨터정보학회 2006 韓國컴퓨터情報學會論文誌 Vol.11 No.4
본 논문에서는 카메라 영상으로부터 사각형 형태의 마커를 검출하고 인식하는 방법을 제안한다. 본 논문에서는 사각형 형태의 마커 검출을 위하여 입력 영상을 이진 영상으로 변환하고 객체들의 윤곽선을 추출한 다음에 윤곽선을 선분으로 근사화 한다. 근사화된 선분으로부터 기하학적 특징을 이용하여 사각형을 찾는다. 마커의 사각형 영역을 찾은 다음에는 워핑 기법을 이용하여 사각형 마커 영상을 정사각형 형태로 정규화한다. 마커 영상을 정규화한 다음에는 주성분 분석을 통하여 마커 영상으로부터 특징 벡터를 추출하고 표준 마커에 대한 특징 벡터와의 최소 거리법에 의해 마커의 종류를 인식한다. 인식 실험 결과 마커의 종류가 50개일 때에 최대 98%의 인식률을 얻을 수 있었고 입력 영상에 11개의 마커가 있는 경우에 초당 11.1 프레임의 수행 속도를 얻을 수 있었다. In this paper, we present a method for the detection and recognition of rectangular markers from a camera image. It converts the camera image to a binary image and extracts contours of objects in the binary image. After that, it approximates the contours to a list of line segments. It finds rectangular markers by using geometrical features which are extracted from the approximated line segments. It normalizes the shape of extracted markers into exact squares by using the warping technique. It extracts feature vectors from marker image by using principal component analysis. It then calculates the distance between feature vector of input marker image and those of standard markers. Finally, it recognizes the marker by using minimum distance method. Experimental results show that the proposed method achieves 98% recognition rate at maximum for 50 markers and execution speed of 11.1 frames/sec for images which contains eleven markers.
이상설 ( Sang-seol Lee ),양경한 ( Kyung-han Yang ),박정서 ( Jung-seo Park ) 대한신경치료학회 2018 신경치료 Vol.22 No.2
Purpose The Purpose of this study was to investigate the effects of additional limitations during walking on cardiopulmonary functions. The results can be used as basic value for studying of relative on lower extremity problem. Methods Ten healthy female college students, none of whom had gait abnormality, were participated in this experiment. Subjects walked on a treadmill at comfortable walking speed(3.62km/h) under three conditions. Three conditions were First group is without a knee immobilized and crutches(N;normal gait), Second group is with a knee immobilized(C;cast), and Third with a knee immobilized and crutches(CC;cast+cruch). RER, VO2, Kcal, VE was measured by K4b2 and body composition by Inbody 570. The effect values were used mean value of that SPSS(ver. 18.0) in performance of all statistical analyses, statistical significance was set at 0.05. Results Measures increased under three conditions, but significant differences existed in VO2, Kcal. Also, Significant differences existed in CC group compared with N group and C group. Conclusion Knee immobilization and using crutches increase energy expenditure during level walking at comfortable walking speed(3.62km/h) than knee immobilization and normal. Therefore, This fact must be considered during gait training and exercise.
이상설(Sang-Seol Lee),장수덕(Soo-Duck Chang),김대호(Dae-Ho Kim) 한국산업경영시스템학회 2006 한국산업경영시스템학회지 Vol.29 No.1
This study is provide information in the development of energy conservation technologies by means of technological demand survey covering energy market and industrial field among energy-related technologies. For this purpose, we check both the present state of energy technologies and trends of social change in Korea, and then combine social needs with major, bottleneck, and essential technologies required for the future. The range of this study covers the field of industry, kiln, furnace, metal, building, transport, and electricity. For case study, valid 120 companies among the 500 companies selected randomly in the energy data-base of Korea institute energy research (KIER) are considered.