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A Robust 3D Coordinate Estimation by using Two IR LED Markers with Constant Distance
ChangHo Han,SoonChul Kim,Choonsuk Oh 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
In previous research, we showed a low-cost and compact motion capture system which enables to play motion games in Play Station 2. The Single-PSD motion capture system that used the intensity light of a marker has a weak measurement at an intensity variation. It is so difficult to make markers having omni-direction equal intensity in Single-PSD. In this paper, we propose a new method that solves aforementioned problems. It can measure 3D coordination with the relation of the optical characteristics if the intensity of a pair of markers is same at forward direction. We made a system based on this proposed method and experimented for performance capability. As a result, we were able to make the motion capture system to the robust system for bad factors, such as variation intensity of markers, external light. The system is stable to obtain 3d positions and an adapt-able motion games. The improved system is expected to be useful in animation, movies and games.
모션캡쳐 시스템에서 3차원 데이터 획득의 정확도 개선을 위한 연구
한창호(Changho Han),서평원(Pyoungwon Seo),김순철(Soonchul Kim),유영기(Youngkee Ryu),오춘석(Choonsuk Oh) 한국정보과학회 2008 한국정보과학회 학술발표논문집 Vol.35 No.1
기존 논문에서 CCD 카메라를 이용해 3차원 데이터를 획득하는 시스템을 소개했었다. 하지만, 정확도에서는 기존에 개발한 다른 PSD카메라를 이용한 시스템과 큰 차이를 보이지 않았다. 본 논문에서는 정확도를 개선하기 위한 여러 가지 실험을 했으며, 결과를 통해 상당히 향상되었음을 알 수 있다. 제안된 방법은 왜곡제거, z축 보정 등이며, 각 방법의 비교실험을 통해 얼마나 개선되었는지 살펴본다.
서울시 복지시설의 공간환경 유니버설디자인을 위한 평가지표 개발
한창호 ( Changho Han ) 커뮤니케이션디자인학회 2015 커뮤니케이션 디자인학연구 Vol.53 No.-
본 논문은 복지시설 이용자의 신체적, 정서적 특성을 반영한 유니버설디자인 평가지표 및 평가를 위한체크리스트를 개발하여 향후 서울시 및 공공복지시설 유니버설디자인 인증 실현을 위한 기반 연구이다. 서울시 노인, 장애인, 아동/청소년/여성시설에 적용할 수 있는 공간환경 유니버설디자인 평가지표 및 평가체크리스트의 개발을 위해 유니버설디자인 원칙 및동향을 파악하고, 복지시설 이용자 특성 구분에 의한시설 영역 및 공간 구분을 하였다. 유니버설디자인 평가지표 개발의 방향 및 요건을 취합하기 위해 전문가 그룹을 통한 어피니티 분석을 도입하여 복지시설 환경 유니버설디자인 속성을 도출하고, 가중치가 반영된 공간환경 유니버설디자인 평가지표 및 체크리스트를 개발하였으며, 체크리스트의 효용성을 검증하기 위하여 환경디자인, 복지서비스 전문가를 대상으로 공간환경 유니버설디자인 모의 평가 및 결과를 도출하였다. 본평가지표 및 체크리스트는 복지시설 영역별 총체적 평가는 물론, 디자인 부문별 비교 평가가 가능한 자료로 활용할 수 있을 것이다. In this paper, the physical facilities of welfare users, develop a checklist for universal design evaluation and assessment indicators of Seoul-based research and public welfare facilities for the realization of Universal Design certification. Seoul elderly, the disabled, children / youth / women facility space environment that can be applied to the universal design evaluation indices and evaluation checklist. To assemble the direction and requirements of universal design evaluation indices were introduced for affinity analysis developed by the Expert Group. Environment and welfare facilities derive a universal design attributes, I developed the space environment, universal design evaluation indicators and checklists. Check to verify the effectiveness of the list of environmental design, space intended for welfare services professionals derive a simulated environment, universal design was evaluated and results. The evaluation index and the checklist welfare facilities area by overall assessment is there will be a comparative evaluation design sector to take advantage of available resources.
자동변속기 차량의 직결영역 변화에 따른 연비 특성에 관한 연구
한창호(Changho Han),김남균(Namkyun Kim),김우석(Wooseok Kim),이종화(Jonghwa Lee),박경석(Kyungseok Park) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently automatic transmission is controlled by a microcomputer. However it is desirable that expanding application of microcomputer to total controlling of both engine ad transmission to achieve the better fuel economy. As a way to decrease fuel consumption, the lockup-control is paid attention in automatic transmission at high speed. Te expanded lock-up area shows improved fuel consumption up to 2.75% in FTP-75 mode. Above result is accomplished because the fuel economy is improved by preventing the slip of the torque converter and increasing the transmittance efficiency. If the control of fuel-cut is added in the deceleration region, the total fuel economy will be enhanced.
한창호(Changho Han),강임호(Imho Kang) 한국라틴아메리카학회 2007 라틴아메리카연구 Vol.20 No.1
This paper argues that the financial intermediation of Mexican financial industry declined after the foreign currency crisis and NAFTA in 1994, though the industry has been rapidly integrated into international capital market since then, using the data of national competitiveness produced by International Institute for Management Development in Swiss. The following four facts support the argument. First, the country risk of Mexico has decreased significantly since 1994, which means that the fund raising cost from international capital market dropped down. Second, it became easier for foreign firms to get access to the domestic capital market, and for domestic firms to the international capital market. Third, the credit to domestic firms, investment of venture capital, financial support to export companies decreased, and the stock market has become less dynamic. Fourth, the financial service to average consumers and the financial regulation has become less efficient. In summary, though Mexican financial industry of 2006 is regarded higher than that before 1994 from international point of view, it has not yet recovered the past competitiveness.
3차원 체인코드와 은닉마르코프 모델을 이용한 권투모션 인식
한창호(Changho Han),오춘석(Choonsuk Oh),최병욱(Byung-Wook Choi) 제어로봇시스템학회 2010 제어·로봇·시스템학회 논문지 Vol.16 No.8
In this paper, a new method to recognize various motions of fighting with an aid of HMM is proposed. There are four kinds of fighting motion such as hook, jab, uppercut, and straight as the fighting motion. The motion graph is generalized to define each motion in motion data and the new 3D-chain code is used to convert motion data to motion graphs. The recognition experiment has been performed with HMM algorithm on motion graphs. The motion data is captured by a motion capture system developed in this study and by five actors. Experimental results are given with relatively high recognition rate of at least 85%.