스마트 병실에서 카메라를 이용한 원격 Bird Eye View 변환

정유수(Y. Jeong),정의성(E. S. Jung),이호열(H. Lee),박영상(Y. S. Park),송찬호(C. Song),손재범(J. Son) 한국재활복지공학회 2021 재활복지공학회논문지 Vol.15 No.4

본 논문은 스마트 병실내에 설치된 카메라로부터 획득된 영상을 병실내 환자의 위치를 Bird Eye View(BEV)상에서 측정하기 위한 연구의 일환으로 기존 BEV변환 기법들과 달리 카메라 캘리브레이션을 위해 엔지니어의 현장방문이 요구되지 않는 원격 BEV변환 알고리즘을 제안한다. 카메라 캘리브레이션을 위해 체스보드마커를 직접 촬영하는 대신 영상과 구조도간 대응되는 점들을 마우스로 클릭함으로써 영상에서 구조도로의 매칭쌍을 생성하고 생성된 매칭쌍에 대해 들로네 삼각화를 적용하여 영상과 구조도 각각에 대응되는 삼각형 영역을 자동 생성한다. 이후 삼각형 매창쌍 별로 어파인 변환을 수행함으로써 BEV변환을 수행한다. 들로네 삼각형을 적용하여 자동으로 영역 분할을 수행할 수 있기 때문에 기존 호모그라피 방법에 비해 특징점 선택의 자유도가 높고, 하나의 변환을 전체 영상에 적용하는 호모그라피와 달리 분할된 들로네 삼각형 각각에 대해 어파인 변환을 수행하기 때문에 지역적 오차가 적다. 제안 알고리즘과 호모그라피 변환을 이용한 원격 BEV변환 결과를 비교하여 그 성능을 검증한다. In this paper, as part of a study to measure the patient"s position on the bird eye view(BEV) of the image obtained from the camera installed in the smart hospital room, unlike the existing BEV transformation techniques, an engineer"s on-site visit is not required for camera calibration. Instead of directly shooting a chessboard marker for camera calibration, by clicking the corresponding points between the image and the structure diagram with the mouse, a mapping matching pair are created from the image to the structure diagram, and the Delaunay triangulation is applied to the image and structure to the created matching pair. A corresponding triangular area in each image is automatically created. For each matching triangle, the affine transformation is conducted. Since the affine transformation is performed for each triangle, the degree of freedom in feature point selection is higher than that of the existing homography method, and the local error is small. The performance is verified by comparing the error of the result of remote BEV transformation using the proposed algorithm and homography transformation.

수면중 호흡수 모니터링을 위한 광삼각 측량 기법을 이용한 비전기반 비접촉식 측정 시스템에서 환경변화에 강인한 레이저 영역 분할 영상처리 알고리즘

정유수(Y. S. Jeong),정의성(E. S. Jung),이호열(H. Lee),박영상(Y. S. Park),송찬호(C. Song),문효정(H. Moon),손재범(J. Son) 한국재활복지공학회 2020 재활복지공학회논문지 Vol.14 No.4

본 논문은 침대에 누워 있는 사람을 대상으로 광삼각 측량 기법에 기반한 비접촉, 무구속 호흡 측정을 위한 시스템을 연구함에 있어 환경변화에 강인한 레이저 영역 분할 영상처리 알고리즘을 제안한다. 해당 시스템은 하나의 침대와 카메라 및 라인레이저로 이루어져있으며 카메라와 라인레이저는 각각 침대의 상단부와 하단부에서 침대 중앙을 향해 조사된다. 사람의 상반신에 반사된 라인 레이저의 빛을 카메라에서 촬영하여 광삼각 측량 기법을 적용하였다. 이때 레이저는 사람의 상반신의 높이를 측정할 수 있는 측정자이며 상반신의 높이변화를 관측하여 호흡수를 측정한다. 본 논문에서는 정확한 호흡수를 측정하기 위해 영상 내 레이저 영역을 견실히 추출할 수 있는 환경변화에 강인한 레이저 영역 분할 영상처리 알고리즘을 제안한다. 시험을 통해 제안하는 알고리즘이 환경 변화에 강인한 알고리즘임을 검증한다. This paper proposes a laser segmented image processing algorithm that is robust against environmental changes in researching a system for measuring non-contact, non-constrained breathing based on optical triangulation techniques for people lying in bed. The system consists of a bed, a camera and a line laser, and the camera and line laser are irradiated from the upper and lower parts of the bed toward the center of the bed, respectively. The optical triangulation technique was applied by measuring the light of the line laser reflected on the upper body of a person with a camera. At this time, the laser is a measurer that can measure the height of a person"s upper body and measures the respiration rate by observing the height change of the upper body. In this paper, we propose a laser region segmentation image processing algorithm that is robust against environmental changes that can reliably extract the laser region in the image to measure the accurate respiration rate. Through clinical trial, we verify that the proposed algorithm is robust against environmental changes.

국산 야초류의 사료적 가치에 관한 연구 -Ⅰ . 야초류의 일반성분과 생육시기에 따른 성분변화에 관한 연구

한인규 ( I K Han ),안병홍 ( B H Ahn ),이영상 ( Y S Lee ),박신호 ( S H Park ),김규익 ( K I Kim ) 한국축산학회 1971 한국축산학회지 Vol.13 No.1

癤?his experiment was conducted to investigate the seasonal changes in chemical composition of some native herbage plants distributed widely in Korea for 3 years from 1968 to 1970. The results obtained are summarized as follows: Sixteen native herbage plants(7 grasses, 3 legumes, 4 shrubs and 2 mixed grasses) from 2 locations in 1968 and thirty different native species from 10 different locations in 1969 were collected to analyze the chemical composition including the content of calcium and phosphorus. Crude protien content for Phragmites prosturatus, Beckmannia erucaeformis, Paspalum thunbergii, Digitaria sanguinalis, Zijania caduciflora and Setaria viridis was higher than other species in grass family and that for Lespedeza striata, Lespedeza cytissides, Lespedeza cuneata, Lespedeza spp. and Pueraria thunbergiana was relatively higher than other species in the legume family. Crude fiber content of Robinia pseudo acacia was the lowest among other species studied and crude fiber content of legumes was lower than grasses, in general. In grass family Digitaria sanguinalis, Phramites prosturatus, Beckmannia erucaeformis, Setaria viridis and Paspalum thunbergii were known to be relatively low in crude fiber content. Although no difference in phosphorus content was found, the calcium content of legumes was significantly higher than that of grasses. It was concluded that the crude protein content decreased and the crude fiber content increased as the growing stage progressed toward maturity. The regression equations with related statistics were established as follows (were X=stage of maturity, month; Y=crude protein or crude fiber, %) $lt;????????gt;

국산야초류의 사료적 가치에 관한 연구 ( Ⅳ. 야초의 소화율및 가소화영양소측정에 관한 연구 )

한인규 ( In K Han ),안병홍 ( B H Ahn ),이영상 ( Y S Lee ),박신호 ( S H Park ) 한국축산학회 1971 한국축산학회지 Vol.13 No.3

This experiment was conducted to determine the digestibility of some native herbage plants and mixed herbage plants distributed widely in Korea, The results obtained are summarized as follows: 1. Effect of maturity stage on nutrient digestibility. Digestibility of nutrients including DM and energy in individual native herbage species was significantly depressed as the growing stage progressed from August to September. The digestion coefficients of crude protein and crude fat for the mixed grass hay harvester) in 1969, August showed higher digestibilities than those of June, then decreased rapidly in Oct. The digestion coefficient of crude fiber decreased as the stage of maturity progressed. The magnitude of depression in digestibility of DM and energy of individual native herbage species was higher than that of mixed native grass. The DCP content of native grasses harvested was higher during the period of August. Dry matter digestibility of samples collected from Songhwan area determined by in vitro method decrease as the stage of maturity advanced. 2. Digestibility difference between green materials and dried materials. Digestibility data obtained from 7 grasses, 3 legumes and 4 shrubs revealed that digestibility of nutrients and the amount of digestible nutrients were much lower for hay than green materials. The digestibility depression of hay was more severe for legumes than grasses. 3. Relationship between DDM and TDN or DE There was a straight linear relationship between DDM and TDN or DE of grasses, legumes and mixed grass. It appeared that the equations might be used to estimate the content of TDN or DE from DDM, since the error attached to the estimate was relatively small. The statistics related to this relationship are summarized as follows (where, X=DDM%, Y=TDN, or DE%) $lt;표생략$gt;

저전력 블루투스 기반 안경형 웨어러블 생체신호 측정 장치 개발을 위한 센서 및 데이터 전송 방식에 대한 고찰

박영상(Y. S. Park),정의성(E. S. Jung),정유수(Y. S. Jeong),송찬호(C. H. Song),김신혜(S. H. Kim),윤혜성(H. S. Yoon),백승호(S. H. Baek),신수현(S. H. Shin),이호열(H. Y. Lee) 한국재활복지공학회 2022 한국재활복지공학회 학술대회논문집 Vol.2022 No.11

Wire-driven hand rehabilitation system and its shared control for reflecting user‘s resistive force

Y. C. Lee(이용찬),Y. S. Lee(이영상),Y. J. Lee(이연정) 한국재활복지공학회 2019 재활복지공학회논문지 Vol.13 No.3

본 논문은 새로운 와이어 구동형 손 재활 시스템 및 사용자 반력을 고려한 공유 제어를 제시한다. 와이어 구동형 손 재활 시스템은 와이어에 연결된 골무형 커넥터에 세 손가락의 끝을 연결하여 재활 동작을 수행한다. 와이어와 풀리 배치를 변경하여 세 손가락 잡기, 가위질, 지두잡기 자세 등 다양한 작업 기반의 동작을 수행할 수 있다. 제안하는 공유 제어기는 안전성 보장을 위한 선형 위치 제어기와 사용자 반력 반영을 위한 장력 제어기로 구성되며 위치 오차에 관계없이 사용자 의도에 따라 장력과 위치 제어 권한을 조절할 수 있다. 세 손가락 작업 기반의 손가락 구동에 대해 사용자 반력의 유무에 따른 위치 제어 및 공유 제어실험을 통해 시스템 성능을 검증한다. This paper presents a new wire-driven hand rehabilitation system and its shared control for reflecting user’s resistive force. The wire-driven hand rehabilitation system performs rehabilitation by putting the fingertips on a thimble shaped connector which coupled to the wire. The system can perform a variety of task-oriented motions such as subterminal tridigital prehension, scissoring and subterminal opposition by changing the wire and pulley layout. The proposed shared controller consists of a linear position controller to ensure safety and a tension controller to reflect user resistive force. The shared controller can regulate tension and position control authority according to user’s intention regardless of position error. The system performance is verified by the position control and the shared control experiments with or without the user resistive force for the task-oriented three finger operation.

SD card를 이용한 심전도 신호 저장 및 모니터링 시스템 개발

박영상(Y. S. Park),김욱은(W. E. Kim),금창윤(C. Y. Keum),제희광(H. G. Je),김대욱(D. W. Kim),윤지영(J. Y. Yoon),정세미(S. M. Jeong),이주학(J. H. Lee),홍주현(J. H. Hong),서수원(S. W. Seo) 한국정밀공학회 2017 한국정밀공학회 학술발표대회 논문집 Vol.2017 No.5월

난용종 대추 ( 大雛 )에 대한 칼슘 및 인의 요구량에 관한 연구 (2)

이영상 ( Y S Lee ) 한국축산학회 1972 한국축산학회지 Vol.14 No.4

The experiment was conducted to determine the calcium and phosphorus requirements for White Leghorn growing chicks of 8-18 weeks of age. Chicks hatched in September were used in this experiment. Basal diet was primarily composed of yellow corn and soybean meal without any animal protein source, containing 0.45 total phosphorus (all plant phosphorus)and 0.2% calcium. Four experimental diets of 0.45% and 0.60% phosphorus levels, with 0.5% and 1.0% calcium levels to each phosphorus levels, were fed in the experiment. It was found that dietary calcium and phosphorus levels during growth in 8-18 weeks of age in this experiment, did not significantly affect body weight gain, feed efficiency and tibia ash content. It was concluded that calcium and phoshorus requirements for White Leghorn growing chicks of 8-18 weeks of age were 0.5% and 0.45%, respectively. These were much lower than what were recommended by National Research Council. It appears that the whole amount of dietary phosphorus to the level of requirement(0.45%) can be supplied with plant phosphorus.

Ⅰ보 . 난용종 유추에 대한 칼슘 및 인의 요구량에 관한 연구

이영상 ( Y S Lee ) 한국축산학회 1970 한국축산학회지 Vol.12 No.1

The experiment was conducted to determine calcium and phosphorus requirements for White Leghorn starting chicks. Six experimental diets of various amounts of calcium(0.6, 0.68, 0.83, 0.85, 0.75 and 1.0%) and phosphorus (0.6, 0.68 and 0.75%) were fed the female chicks of 0-4 weeks of age. All experimental diets were primarily composed of corn and soybean meal with 5% fish meal, and graded levels of calcium and phosphorus were furnished by calcium carbonate, dicalcium phosphate and tricalcium phosphate. Calcium and phosphorus requirements were determined by measuring weight gain, feed efficiency and percent tibia ash. 1) It was indicated that calcium requirement for normal growth and normal bone development of 0-4 weeks of age was 0.85% in diet, which was a little lower than what was recommended by National Research Council. 2) Total phosphorus required for normal growth and percent bone ash was 0.6% in diets. 3) Optimum calcium: phosphorus ratio in diets was indicated to be 1.42:1. 4) It was suggested that about 0.2% inorganic phosphorus was required for normal growth and bone development, and the availability of organic phosphorus appeared to be much higher than what had been thought.

진동 하중을 이용한 마이크로 부품 및 표면 패턴 성형 기술

나영상(Y. S. Na),이종훈(J. H. Lee),이원식(W. S. Lee) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.5

Vibration micro-forming of pyramidal shape patterns was conducted for an Al superplastic alloy. Al 5083 and a Zr-based bulk metallic glass, Zr62Cu17Ni13AI8. A vibrational micro-forming. The micro-formed pattern height was increasing with increasing the frequency of the vibrational load. In particular, the vibrationally-microformed pattern height was similar or even higher than the statically-icroformed pattern height when the load frequency exceeded about 125 kHz. It was also observed that the crystal grains affect the surface quality of the microformed pattern and the distribution of the pattern height in the die cavity array.