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윤근원,고진우,이용웅,Yoon, Geun-Won,Koh, Jin-Woo,Lee, Yong-Woong 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.1
SAR(Synthetic Aperture Radar) has characteristics well-suited for the measurement of geophysical parameters during day and night in all weather conditions. Recently, SAR data with high resolution acquired by satellites became available to the public. In such data, many features and phenomena of geometric structure of man-made objects and natural environments become observable. In this paper, we discuss main considerations including geometric distortion and coregistration for efficient utilization of high resolution SAR images. And, various advanced technologies in SAR application fields are introduced.
프레임동영상의 근실시간 센서모델 보정시스템 개발 및 성능분석
권혁태,고진우,김상희,박세형,Kwon, Hyuk Tae,Koh, Jin-Woo,Kim, Sanghee,Park, Se Hyoung 한국군사과학기술학회 2018 한국군사과학기술학회지 Vol.21 No.3
Due to the increasing demand for more rapid, precise and accurate geolocation of the targets on video frames from UAVs, an efficient and timely method for correcting sensor models of motion imagery is required. In this paper, we propose a method to adjust or correct sensor models of motion imagery frames using space resection via image matching with reference data. The proposed method adopts image matching between the motion imagery frames and the reference frames which are synthesized from reference data. Ground or reference control points are generated or selected through the matching process in near real time, and are used for space resection to get adjusted sensor models. Finally, more precise and accurate geolocation of the targets can possibly be done on the fly, and we have got the promising result on performance analysis in terms of the geolocation quality.
정현광 ( Hyun Gwang Jung ),고진우 ( Jin Woo Koh ),이무열 ( Moo Yeol Lee ) 대한소화기학회 2008 대한소화기학회지 Vol.52 No.4
Idiopathic mesenteric phlebosclerosis, rare disease entity causing chronic mesenteric ischemia is a member of non-thrombotic, non-inflammatory stenosis or occlusion of the mesenteric veins. The histologic hallmark is marked fibrous mural thickening and sclerosis of the vessel wall. It is frequently accompanied by calcification in the vessel wall. We report the case of a 61-year-old woman with idiopathic mesenteric phlebosclerosis. To our knowledge, this is the first case reported in Korea. (Korean J Gastroenterol 2008;52:261-264)
류마티스 관절염 환자에서 발생된 비장의 비호지킨 림프종
이화정 ( Hwa Jung Lee ),고진우 ( Jin Woo Koh ),박정현 ( Jung Hyeon Park ),박성남 ( Sung Nam Park ),이규 ( Kyu Lee ),신현주 ( Hyeon Ju Shin ),이충원 ( Choong Won Lee ) 대한류마티스학회 2005 대한류마티스학회지 Vol.12 No.4
Rheumatoid arthritis (RA) is a chronic, systemic inflammatory disorder of unknown etiology. Inflammation may usually extend beyond the joints and involve other organs. Clinically detectable splenomegaly is present in 5~10% of RA. Methotrexate (MTX) is a structural analog of folic acid that inhibits the enzyme dihydrofolate reductase, so cellular proliferation is reduced. MTX has been proven to be effective in treating RA and is believed to be nononcogenic at low, weekly dose employed in the patients with RA. However, recently there has been increased concern about the oncogenic potential of MTX because of several case reports describing the occurrence of non-Hodgkin`s Lymphoma (NHL) in the patients with RA treated with MTX. A 65-year-old woman with RA was treated with low dose MTX (i.e. 10 mg/week) for 3 years. Because of prolonged left upper abdominal pain and thrombocytopenia associated with huge splenomegaly, splenectomy was performed. Biopsy revealed splenic B-cell NHL. We report a case of RA with splenomegaly who developed B-cell NHL in spleen during low dose MTX therapy.
비디오 프레임 영상의 자유 입체 모자이크 영상 제작을 위한 부등각 모델 연구
노명종(Noh Myoung Jong),조우석(Cho Woo Sug),박준구(Park Jun Ku),고진우(Koh Jin Woo) 대한공간정보학회 2009 대한공간정보학회지 Vol.17 No.3
최근 항공 비디오 영상을 이용한 고해상도 모자이크 영상제작에 대한 연구가 큰 관심사로 대두되고 있다. 그 중, 본 논문에서는 입체 모자이크 영상 제작에 그 목적을 두고 있다. 입체 모자이크 영상은 연속된 비디오 프레임 영상에서 각기 다른 촬영 각도를 가지고 있는 전방과 후방 슬라이스 영상을 추출한 후, 각각을 모자이킹하여 좌우 모자이크 영상을 생성함으로써 제작되어진다. 입체 모자이크 영상을 제작하기 위해서는 프레임 영상간의 기하학적 관계를 규명할 수 있는 이동변수(motion parameters)가 결정되어져야 한다. 본 논문에서는 이러한 이동변수 중, 상대적인 이동변수를 규명할 수 있는 부등각 모델을 적용하였다. 이러한 상대적인 이동변수를 사용하여 모자이크 영상을 제작하는 방법을 자유 모자이크라고 한다. 자유 모자이크 과정은 결정된 이동변수를 이용하여 첫 번째 프레임 영상을 기준으로 영상등록을 수행한 후, 전방 및 후방 슬라이스 영상 추출, 접합선 추출, 영상 모자이킹 과정을 거쳐 수행된다. 본 연구의 결과로 좌우 모자이크 영상과 이를 이용한 여색입체 모자이크 영상을 나타내었으며, 정확도 분석을 위하여 종시차 분석을 수행하였다. Recently, a generation of high quality mosaic images from video sequences has been attempted by a variety of investigations. Among the matter of investigation, in this paper, generation on stereo mosaic utilizing airborne-video sequence images is focused upon. The stereo mosaic is made by creating left and right mosaic which are fabricated by front and rear slices having different viewing angle in consecutive video frames. For making the stereo mosaic, motion parameters which are able to define geometric relationship between consecutive video frames are determined. For determining motion parameters, affine model which is able to explain relative motion parameters is applied by this paper. The mosaicing method using relative motion parameters is called by free mosaic. The free mosaic proposed in this paper consists of 4 step processes: image registration with reference to first frame using affine model, front and rear slicing, stitching line definition and image mosaicing. As the result of experiment, the left and right mosaic image, anaglyphic image for stereo mosaic images are showed and analyzed y-parallax for checking accuracy.
고진우,김도형,김미경,김현옥,최영식 고신대학교의과대학 2007 고신대학교 의과대학 학술지 Vol.22 No.2
저자들은 태생학적 기원, 면역조직화학적, 분자생물학적으로 완전히 별개의 암종인 갑상선 수질암종과 유두암종이 동시에 동일한 갑상선에 발생하는 매우 드문 사례를 경험하였고 이러한 현상이 우연한 동시 발생인지, 공통의 줄기세포 기원인지 혹은 공통의 암 유발인자에 의한 것인지는 여전히 논쟁의 여지를 남겨두고 있다. It is generally believed that the origins of medullary and papillary carcinoma of thyroid are embryologically different. So mixed medullary-papillary thyroid carcinomas are rare. The two separate tumors of the present case may be coincidental double primaries. It can be assumed that at least some of the mixed papillary and parafollicular cell carcinomas are results of collision of carcinomas derived from two embryogenetically different cell types. Recently, we experienced a case of mixed medullary-papillary thyroid carcinomas. A 50-year-old woman was found to have mixed medullary thyroid carcinoma and papillary thyroid carcinoma on the same lobe with lymph node metastases. We report a this case with literature review