가상 터치스크린 시스템을 위한 TOF 카메라 기반 3차원 손 끝 추정

김민욱,안양근,정광모,이칠우,Kim, Min-Wook,Ahn, Yang-Keun,Jung, Kwang-Mo,Lee, Chil-Woo 한국정보처리학회 2010 정보처리학회논문지B Vol.17 No.4

TOF(Time of Flight) 기술은 물체의 3차원 깊이 정보 추출을 가능케 하는 기술 중의 하나이다. 하지만, TOF의 카메라의 출력인 깊이 영상을 이용한 물체의 3차원 위치 추출은 몸이나 손 등 크기가 큰 물체의 경우에는 비교적 신뢰성 있는 결과를 얻을 수 있는데 비하여 크기가 작은 손 끝의 경우에는 신뢰할 수 있는 값을 얻기 힘들다. 본 논문에서는 TOF 카메라에서 육면체 손 모델을 이용하여 수정된 손의 영상에서의 위치 정보와 팔 모델을 이용하여 손 끝의 3차원 좌표를 추정한다. 제안된 방법으로 실험을 한 결과 TOF 카메라의 깊이 영상만을 사용하여 인식한 손 끝의 3차원 위치정보와 비교하여 훨씬 더 향상된 결과를 얻을 수 있었다. TOF technique is one of the skills that can obtain the object's 3D depth information. But depth image has low resolution and fingertip occupy very small region, so, it is difficult to find the precise fingertip's 3D information by only using depth image from TOF camera. In this paper, we estimate fingertip's 3D location using Arm Model and reliable hand's 3D location information that is modified by hexahedron as hand model. Using proposed method we can obtain more precise fingertip's 3D information than using only depth image.

RS-485 통신을 이용한 배관청소 로봇의 모니터링 시스템 개발

김민욱,이헌석,오진석,Kim, Min-wook,Lee, Hun-seok,Oh, Jin-seok 한국정보통신학회 2016 한국정보통신학회논문지 Vol.20 No.5

상 하수도, 해양플랜트 등 다양한 배관이 산업현장에 이용되고 있으며, 이러한 배관의 유지보수 작업은 필수적이다. 특히 산업현장에서 배관 유지보수 작업은 전문 인력이 배관 내 투입되어 작업이 진행되거나, 인력 투입이 불가능한 경우 와이어에 연결된 스크래퍼를 배관에 삽입하는 방식을 이용한다. 그러나 이 방식은 교통체증, 막대한 예산의 투입 등의 문제를 야기한다. 이런 문제점을 해결하기 위한 배관 청소 로봇의 연구, 개발이 진행되고 있다. 현재 배관청소 로봇은 작업 및 운용 상태를 실시간으로 확인할 수 없는 문제점이 있다. 본 논문에서는 배관 청소로봇의 운용, 배관 내부 및 청소 상태를 확인할 수 있도록 카메라로부터 촬영된 영상을 수집하며, 수집된 데이터는 RS-485 통신을 이용하여 모니터링 시스템에 전송하여 사용자가 실시간으로 상태를 확인할 수 있게 구성하였다. Various pipes are used in the many industrial field such as water supply, drainage system and marine plants, so a maintenance of these pipes is essential. Especially, the maintenance of the piping in the industrial field, some professional staffs enter and clean the pipe. If the professional staffs can not enter and clean the pipe, the workers has to use the method of inserting a scraper connected to wire inside the pipe. However, this method demands huge budget and causes a number of problems such as traffic congestion. To solve these problems, pipe cleaning robot has been researching and developing. Many Pipe cleaning robots have a problem, that is impossible to confirm the operating condition of the robot in a real time. This paper suggest pipe cleaning robot with RS-485 which transmit operating and cleaning condition of robot and inner pipe filmed by camera, that user can check.

군수지원함의 CODAD, CODLOD 및 CODLAD 추진체계에 따른 연료 소비량 비교 및 분석

김민욱,오진석,Kim, Min-wook,Oh, Jin-seok 한국정보통신학회 2017 한국정보통신학회논문지 Vol.21 No.5

천안함 피격사건 이후 대한민국 해군은 함정에 복합 추진체계를 탑재하여 운항 시 발생하는 진동 및 소음 문제를 줄이기 위한 노력을 기울이고 있다. 복합 추진체계는 함정의 저속 운항 구간에서 추진용 전동기를 이용하여 추진할 수 있는 장점을 가진다. 이는 기존의 내연기관만으로 이루어져 있는 기계 추진체계보다 우수한 정숙성을 가질 수 있고, 내연기관의 연료 효율이 불량한 저속 구간에서 전동기를 이용하기 때문에 보다 경제적이다. 이에 본 논문에서는 대한민국 해군에서 운용하고 있는 군수지원함을 바탕으로 가상함정을 설정하였으며 기존의 추진체계와 복합 추진체계의 연료 소비량을 시뮬레이션 하여 경제성 측면에서 비교 및 분석하였다. 그 결과 전동기를 겸하여 운용할 수 있는 복합 추진체계의 연료 효율이 상대적으로 개선된 것을 확인하였다. After patrol corvett Cheonan was hit and sank on duty, the Republic of Korea Navy has tried to install hybrid propulsion system on naval ship to reduce vibration and noise problems during navigation. The hybrid propulsion system has advantage that propulsion motor can be propelled in low speed operation of the vessel. This can be a better quietness than a mechanical propulsion system which consists of a conventional internal combustion engines. And more economical operation is possible by using a propulsion motor in a low speed operation where a fuel efficiency of the internal combustion engine is poor. In this paper, we set up virtual ship on the basis of a combat support ship in the Republic of Korea Navy, economically compared and analyzed fuel consumption between conventional and hybrid propulsion system. As a result, it was confirmed that the fuel efficiency of hybrid propulsion system which use electric motor had been relatively improved.

Model Based Design Process에 따른 embedded System의 개발

김민욱,최재훈,박인철,황호성,Kim, Min Wook,Choi, Jae Hoon,Park, In Chul,Hwang, Ho Sung 한국시스템엔지니어링학회 2009 시스템엔지니어링학술지 Vol.5 No.2

An embedded system is a computer system designed to perform one or a few dedicated functions often with real-time computing constraints. A traditional design process of embedded systems is the development of document-centric approach, and it is difficult to develop an embedded system efficiently because communication between teams or steps is not smooth. So the Model Based Design Process are applied to the development of embedded systems. This paper will compare the Model Based Design Process and the traditional design process, and introduce example of development of vehicle device applied the Model Based Design Process.

영농부산물 소각에서 발생하는 가스상 오염물질의 배출계수 개발 -맥류를 중심으로-

김민욱 ( Min-wook Kim ),노준영 ( Joon-young Roh ),우지윤 ( Ji-yun Woo ),이동은 ( Dong-eun Lee ),홍성창 ( Hong-sung Chang ),김승진 ( Seung-jin Kim ) 한국환경농학회 2023 한국환경농학회지 Vol.42 No.4

The current study involved the calculation of air pollutant emission factors (EFs) generated from the incineration of agricultural residues. The process included sample collection, weight measurement, moisture measurement, incineration system configuration, and concentration measurement. The average CO emission factor of gaseous air pollutants from the incineration of barley and wheat agricultural residues was calculated as 0.08289 kg/kg and 0.06665 kg/kg, respectively, whereas the average NO_X emission factor for barley and wheat agricultural residues was determined to be 0.00518 kg/kg and 0.00185 kg/kg, respectively. In the existing air pollutant emission calculation manual, the EF is presented only for barley. Therefore, in this study, we have introduced the EF for wheat, previously absent in the calculation manual. Additionally, the air pollutant calculation manual presents the EF of air pollutants as one value, but in this study, EF values corresponding to 2.5% and 97.5% were presented in consideration of the distribution of experimental values as shown in EMEP/EEA data.

다층신경망과 3차원 시각정보에 기반한 가상스크린 시스템

김민욱(Min-Wook Kim),안양근(Yang-Keun Ahn),이칠우(Chil-Woo Lee) 한국멀티미디어학회 2009 한국멀티미디어학회 학술발표논문집 Vol.2009 No.1

터치스크린의 물리적인 한계를 보완하는 가상터치스크린의 연구가 활발히 이루어지고 있다. 본 논문에서는 TOF(Time Of Flight) 카메라에서 나오는 3차원 깊이 정보를 다층신경망(Multi Layer Perceptron)으로 인식하여 제어가 가능한 가상터치 스크린에 대해 기술한다. 이 시스템은 입력된 영상으로부터 물체 영역을 추출한 뒤 미리 학습된 물체의 궤적과 비교하여 제스처를 인식한다. 이 시스템은 인간의 행위를 이용하여 가상 공간의 콘텐츠를 조작하는 것을 가능케 한다.

클라우드 시스템의 실시간 이상 진단 기능 설계

김민욱(Kim Min Wook),김영한(Kim Young Han) 한국통신학회 2018 한국통신학회 학술대회논문집 Vol.2018 No.6

과수원에서 사과 및 배 재배 시 복합비료 시용에 따른 암모니아 배출계수 평가

김민욱 ( Min-wook Kim ),홍성창 ( Sung-chang Hong ),유선영 ( Seon-young Yu ),김진호 ( Jin-ho Kim ) 한국환경농학회 2021 한국환경농학회지 Vol.40 No.4

BACKGROUND: Ammonia is known as a precursor to fine particulate matter, and according to CAPSS, annual ammonia emissions in the agricultural sector were 249,777 tons as of 2018, accounting for about 79.0% of Korea's total ammonia emissions. In particular, ammonia emissions from agricultural land increased by 19,566 tons (10.2%) compared to the previous year. The Ministry of Environment is setting emission statistics using the ammonia emission coefficient developed in Korea in 2008, but researchers in the agricultural field regard it as a coefficient that does not reflect the reality of Korea's agricultural environment. Accordingly, in order to develop ammonia emission coefficients from the cultivation of apples and pears, Korea's representative fruit type, test agricultural land was set in Iksan, Jeollabuk-do. METHODS AND RESULTS: This study attempted to obtain the ammonia emission coefficient by the treatment of the composite fertilizer (N-P₂O₅-K₂O=12-7-9), and the flux was measured using a dynamic flow-through chamber method. As for the chamber, a total of 12 chambers were installed repeatedly in 4 zones and used to develop emission coefficients. Using compound fertilizers during fruit tree cultivation, the ammonia emission coefficient was evaluated as 10.4 kg NH₃/ton for pears and 15.3 kg NH₃/ton for apples. The reason why the ammonia emission coefficient according to the use of composite fertilizers was calculated higher for apple cultivation is believed to be due to the relatively high pH concentration of apple orchard soil. CONCLUSION(S): This study may provide basic data for upgrading the ammonia emission coefficient when using composite fertilizers in agricultural land. In the future, it might be necessary to upgrade the calculation of emissions through the development of ammonia and fine particulate matter emission coefficients considering the agricultural environment of Korea.

연기발생기와 가스센서를 이용한 훈련장 구축 및 모니터링에 관한 연구

김민욱(Min Wook Kim),이건호(Gun Ho Lee),김시국(Si Kuk Kim),홍성철(Sung Chul Hong) 한국화재소방학회 2023 한국화재소방학회 학술대회 논문집 Vol.2023 No.1

12주간의 신경근 훈련이 프리스타일 스키 선수들의 동적자세조절 및 FIS점수에 미치는 효과

김민욱(Kim, Min-Wook),박우영(Park, Woo-Young) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.5

The purpose of this study was to 12 week-neuromuscular training program focused on core stability and lower extremity strength would affect performance on the Y-balance, functional reach and FIS point. The Y-balance is a functional screening tool that is used to assess dynamic stability, monitor rehabilitation progress, assess deficits following an injury, and identify athletes at high risk of for lower extremity injury. The Y-balance requires lower extremity coordination, balance, flexibility, and strength. Twenty uninjured collegiate and high school ski player(7 exercise, 8 control) participated. The Y-balance and functional reach test was administrated prior to and following 12 week-neuromuscular training program in the experimental group and 12 week- no neuromuscular training program in the control group. After participation in a neuromuscular training program, subjects demonstrated a significant improvement in the Y-balance composite score on the posteromedial left, posterolateral right limb and the left limb. And functional reach test was significantly developed. However the control group had no change on the Y-balance composite score for the all direct and functional reach. And FIS also not significantly difference pre and post. We conclude that, ski players demonstrated an improved performance on the Y-balance and functional reach test in after neuromuscular training program that focused on core stability and lower extremity strength.