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Stochastic Model for Unification of Stereo Vision and Image Restoration
우운택,정홍,Woo, Woon-Tak,Jeong, Hong The Institute of Electronics and Information Engin 1992 전자공학회논문지-B Vol.b29 No.9
The standard definition of computational vision is a set of inverse problems of recovering surfaces from images. Thus the common characteristics of the most early vision problems are ill-posed. The main idea for solving ill-posed problems is to restrict the class of admissible solutions by introducing suitable a priori knowledge. Standard regurarization methods lead to satisfactory solutions of early vision problems but cannot deal effectively and directly with a few general problems, such as discontinuity and fusion of information from multiple modules. In this paper, we discuss limitations of standard regularization theory and present new stochastic method. We will outline a rigorous approach to overcome part of ill-posedness of image restoration, edge detection, and stereo vision problems, based on Bayes estimation and MRF(Markov random field) model, that effectively deals with the problems. This result makes one hope that this framework could be useful in the solution of other vision problems.
우운택,박태원,정란 단국대 부설 리모델링연구소 2005 리모델링 연구소 논문집 Vol.3 No.2
Recent building structures are superior in its ability but they are light and flexible, and so have problems of habitability induced by building vibration. In general, the problem of vertical vibration is not considered in structural design. However, in terms of serviceability for inhabitants in buildings, the estimation of vertical vibration in design stage is important. Characteristics of vertical vibration is changed by modeling method of beam-column joint. To check the characteristics of vertical vibration, many tests and analyses were conducted on constructing building in Seoul. Results of tests and analyses were compared using transfer function. As a results, to check the vertical vibration characteristics, the cramp ratio of beam-column joint must be considered and reduced to 50% ~ 60% in structural design.
우운택,U, Un-Taek 한국광학기기산업협회 2016 光學世界 Vol.163 No.-
가상현실 및 증강현실 기술이 미래 지식서비스 산업으로 각광 받으면서 가상/증강현실 시대를 대비하는 IT 기업들이 증가하고 있다. 본 글에서는 증강현실 분야의 현황, 증강현실의 기본 개념 및 정의, 미래발전 방향으로서의 증강휴먼, 증강휴먼 핵심기술 및 응용을 살펴보고 이를 통해 미래 전망을 도출하고자 한다.
우운택,한남희,정란 단국대 부설 리모델링연구소 2003 리모델링 연구소 논문집 Vol.1 No.2
This paper presents the experimental results of a Soil-Cement Composite Earth Retaining Wall comprised of reinforced concrete underground wall, H-shaped steel beams in earth retaining wall and fiber reinforced soil cement wall. Sixteen specimens are tested to evaluate the bending capacity of the wall. Main variables in the test are strength of concrete, arrangement of shear connector, soil-cement, and fiber reinforcement. Test results are as follows. (1) Composite member under positive moment showed 18% increase of the maximum strength. (2) After soil cement was reinforced with fiber by adding 1% of soil cement weight, compared to cases not reinforced with fiber, strength of under compression increased 7%, moreover, 30% of strength enhancement was shown under tension case also. (3) When the composite member resists positive bending moment (i.e., H-shaped steel beam is in compression), the strength is increased by 18%. Moreover, 7% additional strength enhancement appears after the soil cement is reinforced by fiber. As a results, fiber reinforced soil cement has strength enhancement effect up to 25%.