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평면모델 기반 수중 비디오 모자익 제작에 관한 연구 방안
권광석(Kwang-Seok Kwon),우희숙(Hee-Sook Woo),강진아(Jin-A Kang) 한국마린엔지니어링학회 2009 한국마린엔지니어링학회 학술대회 논문집 Vol.2009 No.-
In this paper, it was outlined a methodology to reconstruct three dimensional planes from underwater-video frames with positions, attitudes and altitudes of an underwater camera at same times. To reconstruct target planes, there are some assumptions that camera is aligned to the flat seafloor and imageries are obtained with slant view to the bottom. In these conditions, digital photogrammetry and GPU(Graphic Processing Unit) based parallel processing methodology help us to get more quickly underwater-video mosaic imagery with reconstruction of three dimensional surface. This proposed method let us to get position, distance and area in video frames with flat surface model based reconstructions. It is expected that more quantitative and transcendental informations in underwater will be provided by combining digital photogrammetry with recent IT technologies.
수치사진측량을 이용한 수중 파이프 비디오 모자익 영상 제작에 관한 연구
강진아 ( Jin A Kang ),권광석 ( Kwang Seok Kwon ),김병국 ( Byung Guk Kim ),오윤석 ( Yoon Seuk Oh ) 한국지리정보학회 2008 한국지리정보학회지 Vol.11 No.4
현재 국내의 수중 및 해양 시설물 관리는 아날로그 필름에 의한 육안분석에 의존하고 있다. 본 연구에서는 이러한 방법을 개선하기 위하여 보다 정량적인 수중시설물의 공간적인 상태를 분석하고자 하였다. 본 연구는 수중영상 왜곡보정과 모자익 제작의 두 단계로 나누어 진행하였다. 수중영상 왜곡보정 단계에서는 수중 타겟을 제작하고 타겟 격자점으로부터 왜곡계수를 산출한 후, 수중영상으로 포착한 영상점을 왜곡이 보정된 영상점으로 위치 보정하는 기술을 개발하였다. 그리고 모자익 제작 단계에서는 먼저, 수중에 송유관 형태의 파이프를 설치한 후 영상을 획득하였으며, 왜 곡보정을 실시한 후 보정된 파이프 영상을 좌표 변환 후, 산출된 특이점을 바탕으로 모자익 영상을 제작하고 필터링을 통해 외곽선 추출하고 파이프와 수중바닥과의 거리를 계산하였다. 그 결과, 실제 파이프와 수중지반과의 거리가 6cm일 때 평균 RMSE 0.3cm로 나타났다. The present domestic underwater and ocean facilities management depends on analysis with the naked eye. This study performs quantitative analysis to improve conventional methods, analyze spatial situation of underwater facilities. This research is divided into two steps; underwater image distortion correction and image mosaic step. First, underwater image distortion correction step is for the production of underwater target, calculates the correction parameters, and then developed the method that convert the original image point to whose distortion is corrected. Second step is for the obtaining pipe images installed in the underwater, corrects the distortion, and then transforms a coordinates of the correction pipe image. After coordinate transformation, we make the mosaic image using the singularities. As a result, when we measure the distance between pipe and underwater ground and compare with calculation value on mosaic image, it is showed that RMSE is 0.3cm.
문성규,권순환,강진아,조윤주,김지관 한국산업경영시스템학회 2006 한국산업경영시스템학회 학술대회 Vol.2006 No.춘계
The consumer"s choice options for beer are broaden by importing of foreign beers freely in recent domestic beer market. Especially, young university students are understanding to select various beer in contrast with seniors, but there"s no report about their preference and criteria of selection for beer in spite of them being major consumer of beer. This study derive the Kansei structure and Kansei words for beer by EGM(Evaluation Grid Method), and analysis of preference and evaluation of each beer are carried out by SD(Semantic Differential) method which used Kansei words as a question. The result of this study will be expected to contribute the development of beer moving the consumer.
무지 외반증 환자에서 전족부의 방사선상의 지표들과 족저 압력의 관계
이우천,권강진,정지현,고한석,Lee, Woo-Chun,Kwon, Kang-Jin,Chung, Ji-Hyun,Ko, Han-Suk 대한족부족관절학회 2003 대한족부족관절학회지 Vol.7 No.1
Purpose: To investigate the relationship between radiographic parameters of the forefoot and plantar pressure in patients with hallux valgus. Materials and Methods: Plantar pressures of 21 patients with hallux valgus were examined with EMED-ST system. The data were compared with the parameters on the simple weightbearing dorsoplantar radiographs of the feet. The radiographic parameters that were measured were hallux valgus angle, 1-2 intermetatarsal angle, relative lengths of the metatarsals which were measured with the methods described by Maestro et al. and Okuda et al. Results: Statistically significant correlation was found between peak pressures under 2, 3 metatarsal heads and the relative lengths of 2, 3 metatarsals which were measured with the method described by Maestro et al. However they could explain only 13% of the pressures under the 2, 3 metatarsal heads by multivariate analysis. Conclusion: These results suggest that we cannot predict the plantar pressures under the foot with the parameters on the simple weightbearing dorsoplantar radiographs of the feet.
발뒤꿈치 천자(heel sticks)시 달래기 젖꼭지(Nonnutritive Sucking)의 제공이 미숙아의 행동상태와 생리적 반응에 미치는 효과
이정애,강진선,조용희,정순미,홍금숙,권오미,정미숙 병원간호사회 2001 임상간호연구 Vol.7 No.2
The main purpose of this study was to determine the effects of NNS on behavioral stats and physiologic response(heart rate and oxygen saturation) in premature infants receiving heel stick. The data were collected from June to October, 2001 from 16 premature infants who were less than 37 weeks of gestational age. The research design is cross over quasi-experimental design to control characteristic of premature infants. The Anderson Behavioral State Scale(ABSS) was used for the evaluation of the premature infants' behaviors. The ABSS classified infants behaviors into 12 states. In this study, behavioral state ratings were collapsed into five categories. The heart rate and oxygen saturation levels were recorded from Criticare patient monitor which attached to each to each premature infants. For the statistical analysis of data, the SPSS-PC Program, as well as descriptive statistics and Wilcoxon signed rank test were used. The results were as follow : 1. The behavioral state between the NNS cases and non-NNS cases were significantly different. The finding was statistically significant at p<.05 level. 2. The mean heart rate between the NNS cases and non-NNS cases were significantly different(p=.011). 3. The mean oxygen saturation between the NNS cases and non-NNS cases were significantly different(p=.048) In conclusion, for premature infants who must routinely endure stressful and often painful procedures that are unavoidable in treatment, NNS is a effective and safe nursing intervention. A study with large sample in a variety of settings will be the needed for the following study so that nurses can apply this intervention to premature infants.
서정국,권강진 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.4
Purpose : The purpose of this article is to show the efficacy of a cervical epidural steroid injection for cervical disease. Materials and Methods : Twenty-five patients who underwent an cervical epidural steroid infection for subacute cervical sprain. cervical HNP(herniated nucleus pulposus) and degenerative cervical spondylosis from Jan. 1998 to May 1999 were enrolled into the study. The cases were analyzed by verbal analogue percentage scale at 1 months, 6 months and 2 years later. Results : In this study, excellent or good result was shown in 15 patients(60%) one month later, in 10 patients(40%) sixth months later and in 9 patients(36%) 2 years later. Complication was shown in one patients with mild headache. Conclusion : We concluded that the cervical epidural steroid injection was the appropriate method for inflammatory reaction of cervical radiculopathy but not for the mechanical problem.
이우천,고한석,권강진,김승우,Lee, Woo-Chun,Ko, Han-Suk,Kwon, Kang-Jin,Kim, Sung-Woo 대한족부족관절학회 2001 대한족부족관절학회지 Vol.5 No.2
Purpose: To investigate clinical features and treatment of os subfibulare Materials and Methods: This is a retrospective study on twenty-eight patients who have symtoms associated with os subfibulare. We reviewed charts and radiographs. Thirteen patients were treated surgically and fifteen patients were treated conservatively. We analysed clinical results in 25 patients who were followed for more than one year. Results: Duration from the onset of symtoms to treatment was more than six months in twelve of thirteen surgically treated cases, and in only two of fifteen conservative treated cases. Surgical procedures were internal fixation of the os subfibulare in two patients, and resection of os subfibulare and ligament reconstructions in eleven patients. Clinical results were excellent in six, good in three and poor in two of operatively treated patients. In conservatively treated patients, five excellent, five good, one fair and one poor clinical results were obtained. Conclusion: Os subfibulare is not necessarily a cause of instability and pain, but in cases with chronic pain and/or instability, surgical treatment would result in satisfactory result.