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Support Vector Machine을 이용한 실시간 도로기상 검지 방법
서민호,육동빈,박새롬,전진호,박정훈,Seo, Min-ho,Youk, Dong-bin,Park, Sae-rom,Jun, Jin-ho,Park, Jung-hoon 한국산업융합학회 2020 한국산업융합학회 논문집 Vol.23 No.6
In this paper, we propose a method to classify road weather conditions into rain, fog, and sun using a SVM (Support Vector Machine) classifier after extracting weather features from images acquired in real time using an optical sensor installed on a roadside post. A multi-dimensional weather feature vector consisting of factors such as image sharpeness, image entropy, Michelson contrast, MSCN (Mean Subtraction and Contrast Normalization), dark channel prior, image colorfulness, and local binary pattern as global features of weather-related images was extracted from road images, and then a road weather classifier was created by performing machine learning on 700 sun images, 2,000 rain images, and 1,000 fog images. Finally, the classification performance was tested for 140 sun images, 510 rain images, and 240 fog images. Overall classification performance is assessed to be applicable in real road services and can be enhanced further with optimization along with year-round data collection and training.
선박자동식별시스템(AIS)과 XML을 이용한 선박위치정보 서비스
서민호,김건웅,Seo, Min-Ho,Kim, Geon-Ung 한국정보통신학회 2011 한국정보통신학회논문지 Vol.15 No.12
AIS(선박자동식별시스템)는 인접한 선박의 정보를 서로 통신하여 해양사고를 예방하거나 대응할 수 있게 해주고, 해상의 다양한 정보를 다른 정보와 융합하여 새로운 정보를 창출할 수 있는 해양 정보시스템의 핵심이라 할 수 있다. 이러한 AIS정보는 많은 잠재적 정보를 담고 있지만, 저장과 관리의 미흡으로 사용하기 쉽지 않고, 또한 정보를 얻기 위해 반드시 AIS 송수신기가 있어야 한다. 본 논문에서는 이러한 AIS와 XML을 이용한 선박위치정보 서비스를 제안한다. 이를 위해 NMEA-0183으로 인코딩된 AIS 정보를 디코딩하여 데이터베이스로 저장하고, 인터넷 상에서 XML을 이용하여 정보를 탐색하는 서비스를 구축하였다. AIS(Automatic Identification System) is a key of maritime information system to prevent maritime accident through communication among any adjacent ship and to establish information base by fusing information collected from ships with other information. The AIS information includes various potential information, but it is not easy to use due to insufficiency storing and management. Furthermore, we need AIS transponders to acquire the information. In this paper, we propose the vessel positional information service using AIS and XML. We decode the AIS information from the NMEA-0183 encoding data and store the AIS information to the database and provide the access service in the internet using XML.
서민호(Seo, Min-Ho),김세용(Kim, Sei-Yong) 한국도시설계학회 2012 도시설계 : 한국도시설계학회지 Vol.13 No.1
이 연구는 도시공간구조와 대중교통체계, 토지이용 및 지구단위계획 등을 종합적으로 고려한 대중교통회랑 계획모델을 제시하고, 녹색도시 구현과 관련하여 교통ㆍ환경 측면에서 어떠한 영향을 미치는지에 대한 분석하는 것을 목적으로 한다. 이 연구에서 정의하는 대중교통회랑은 승용차 의존적 도시공간구조를 극복하기 위해 노면형 대중교통노선 주변 400~600m 지역의 토지이용을 중ㆍ고밀도로 복합화하고 보행ㆍ자전거 친화적인 대중교통중심생활권을 회랑형으로 조성하는 도시ㆍ교통 통합개발이다. 안양시를 대상으로 약 9㎞의 노면형 대중교통체계 도입과 회랑축 반경 400m 권역의 복합용도개발 등을 병행하는 대중교통회랑 계획모델을 적용한 결과, 다음과 같은 효과가 있을 것으로 분석되었다. 안양시에 대중교통회랑을 도입할 경우, 개발수준별 시나리오에 따라 대중교통분담률을 3.5~5.9% 증가시켜 연간 약 161,000~292,800 kl의 교통에너지 소비 저감이 가능할 것으로 분석되었다. 이를 통해 연간 40.2~73.1 만톤의 CO₂ 배출량 감축과 연간 2,577~4,688 억원의 경제효과 유발이 가능한 것으로 판단된다. This study aims to synthesize urban spatial structure, mass transit systems, and land use related to district unit planning into a transit-oriented corridor (TOC) model in order to realize green cities. Expanding upon transit-oriented development (TOD), the TOC further overcomes dependence on automobiles by incorporating various land uses within 400 to 600m of mass transit routes through planning mixed and middle to high density buildings, in addition to pedestrian and bike-friendly streets into a corridor. This study focuses on a 9㎞ mass transit corridor passing through Anyang City, encompassing a region of 400m in order to test a parallel application of mixed-use development and the TOC planning model. The results of the analysis indicate that after applying the model, ridership would increase from 3.5 to 5.9% and that energy consumed for transportation would decrease by 161,000 to 292,800 kl. Furthermore, the city would enjoy a reduction of CO₂ emissions from 402 to 731 thousand tons along with an increase in economic activity of 2.2 to 3.9 billion USD.
서민호(Seo, Min-Ho),정근주(Jung, Gun-Joo) 대한건축학회 2013 대한건축학회논문집 Vol.29 No.4
The learning efficiency of university students has been unsatisfactory due to the poor environmental control in the classroom during early and late of the semesters. Since it is well-known that large amount of cost and energy is required to maintain comfortable Indoor Environmental Quality (IEQ) in university classroom for the operation of HVAC system, university authorities require basic guideline to be provided for their decision making on maintenance of optimum IEQ. This research is performed to provide the basic information that can be used for establishing IEQ standards. Learning efficiency of students depending on changes in physical variables is investigated by surveying 45 students during two semesters (from fall 2011 to spring 2012). The physical variables in university classroom was 1) temperature variation of 14.7 to 26.7℃, 2) relative humidity of 25.3∼70.1%, 3) air motion of 0∼0.3m/s, 4) CO<sub>2</sub> concentration of 739∼2003ppm, 5) illumination intensity of 376∼630lux, and 6) noise level of 54.9 ∼64.8dB. The average day temperature of outdoor during two semesters varied from 2.0 to 24.4℃. According to the results from this surveying, the variable that affects mostly on learning efficiency of the students was thermal comport followed by CO<sub>2</sub> concentration, illumination, and noise level. About 75% of students showed higher learning efficiency in room temperature range of 18∼23℃. The result was quite different from known thermally comfortable temperature range of 22∼26℃ in the office. Further research is necessary on modifying the environmental standards for university classroom for higher learning efficiency.
서민호(Seo Min-Ho),김세용(Kim Sei Yong) 대한국토·도시계획학회 2011 國土計劃 Vol.46 No.4
This study has been aimed to identify the relationship between planning elements of urban form and trip behavior characteristics focused on planning policy for the Green City by size and locations. For this purpose, the study established the correlation and regression analysis model by using various indices and data regarding these characteristics gathered from 32 cities and 109 gus (boroughs) in Korea. The planning elements of urban form are defined as 3Ds (Density, Diversity and Design) and travel behaviors indices are defined as trip frequency, volume and space-load by trip modes. The main results of this study are as follow. First of all, as the population density increase and road density decrease in metropolis or cities in Seoul metropolitan area, automobile travel behavior tends to decrease and transit travel behavior tends to increase. Secondly, the analysis results demonstrate that the population-employment mixture and industry diversity related to whole sale, retails and services are the effective factors to decrease automobile-dependence of city. Thirdly, some diversity and design factors of urban form are diverse influence on travel behavior characteristics by city size and location. In summary, urban form adjustment by size and locations can function as an effective planning method for realizing the Green city in Korea.
IKONOS 정사영상제작을 위한 폐색 영역의 탐지와 복원
서민호 ( Min Ho Seo ),한동엽 ( Dong Yeob Han ),이병길 ( Byoung Kil Lee ),김용일 ( Yong Il Kim ) 大韓遠隔探査學會 2006 大韓遠隔探査學會誌 Vol.22 No.2
중심투영 기하를 가진 항공사진과 마찬가지로 IKONOS 위성 영상도 CCD 라인에서 중심투영 기하를 갖는다. 이로 인해 건물, 지형 등에 의한 영상 폐색이 존재하지만, IKONOS 영상의 정사보정을 위해 RPC 표정정보를 이용하여 폐색을 감지하는 것은 쉽지 않다. 따라서 본 연구에서는 영상 취득시의 위성 고도각과 방향각을 이용하여 폐색 영역을 탐지하고 중복 영상을 활용한 폐색 영역의 영상복원을 수행하여, 실제적인 IKONOS 정사 영상을 제작하였다. 그리고, 생성된 정사 영상의 위치정확도로부터 폐색 탐지 알고리즘의 적합성을 평가하였다. IKONOS images have the perspective geometry in CCD sensor line like aerial images with central perspective geometry. So the occlusion by buildings, terrain or other objects exist in the image. It is difficult to detect the occlusion with RPCs(rational polynomial coefficients) for ortho-rectification of image. Therefore, in this study, we detected the occlusion areas in IKONOS images using the nominal collection elevation/azimuth angle and restored the hidden areas using another stereo images, from which the true ortho image could be produced. The algorithm`s validity was evaluated using the geometric accuracy of the generated ortho image.