경계선 영역 정보를 이용한 밝기값 기반 스테레오 정합

최동준,김도현,양영일,Choi, Dong-Jun,Kim, Do-Hyun,Yang, Yeong-Yil 대한전자공학회 1998 電子工學會論文誌, S Vol.s35 No.12

In this paper, we propose the novel cost functions for finding the disparity between the left and the right images in the stereo matching problem. The dynamic programming method is used in solving the stereo matching problem by Cox et al[10]. In the reference[10], only the intensity of the pixels in the epipolar line is used as the cost functions to find the corresponding pixels. We propose the two new cost functions. The information of the slope of the pixel is introduced to the constraints in determining the weights of intensity and direction(the historical information). The pixels with the higher slope are matched mainly by the intensity of pixels. As the slope becomes lower, the matching is performed mainly by the direction. Secondly, the disparity information of the previous epipolar line the pixel is used to find the disparity of the current epipolar line. If the pixel in the left epipolar line, $p-i$ and the pixel in the right epipolar line, $p-j$ satisfy the following conditions, the higher matching probability is given to the pixels, $p-i$ and $p-j$. i) The pixels, $p-i$ and $p-j$ are the pixles on the edges in the left and the right images, respectively. ⅱ) For the pixels $p-k$ and $p-l$ in the previous epipolar line, $p-k$and $p-l$ are matched and are the pixels on the same edge with $p-i$ and $p-j$, respectively. The proposed method compared with the original method[10] finds the better matching results for the test images. 본 논문에서는 왼쪽 카메라와 오른쪽 카메라에서 획득된 두 영상에서 변이를 찾는 새로운 비용함수를 제안하였다. Cox 등[10]은 극상선상에서 화소의 밝기값으로 비용함수를 계산한 후, 동적 프로그래밍법을 사용하여 스테레오 정합문제를 해결하였다. 본 논문에서는 밝기값 외에 새로운 두 비용함수를 제안하였다. 하나는 화소의 기울기 정보를 밝기값과 방향성의 가중치를 결정하는 기준으로 사용하는 것이다. 기울기가 큰 화소는 주로 화소의 밝기값에 의해 정합이 이루어지고, 기울기가 작은 화소는 방향성을 이용한 정합이 이루어지도록 비용함수를 조절하였다. 다음으로 현재의 극상선상에서 변이를 구하기 위해 이전 극상선에서의 정합이 이루어진 두 화소 $p-k$와 $p-l$가 현 비교되는 화소와 같은 경계선상에 위치하면, $p-i$와 $p-j$가 정합이 이루어질 가능성을 크게 비용함수를 조절하였다. 제안된 방법을 여러 영상에 적용한 결과 이전의 방법보다 더 정확한 정합이 이루어짐을 확인하였다.

급성기 중풍환자에서 음주습관이 중풍의 발생양상에 미치는 임상적 영향

최동준,현진오,신원용,김용형,강아미,이원철,전찬용,조기호,한창호,Choi, Dong-Jun,Hyun, Jin-Ho,Shin, Won-Yong,Kim, Yong-Hyung,Kang, A-My,Lee, Won-Chul,Jun, Chan-Yong,Jo, Ki-Ho,Han, Chang-Ho 대한한방내과학회 2007 大韓韓方內科學會誌 Vol.28 No.1

Objectives : This study investigated the clinical effect of a drinking habit in acute stroke patients. Methods : 409 acute stroke patients were included from October 2005 to October 2006. Patients were hospitalized within 14 days after the onset of stroke at DongGuk University International Hospital, Kyungwon University In-cheon Oriental Medical Hospital, or Department of Cardiovascular and Neurologic Diseases (Stroke Center), Kyung Hee University Oriental Hospital. We investigated general characteristics, drinking habit, and stroke subtype by TOAST classification. Results : Among drinking subjects, hemorrhagic stroke was more frequent than ischemic stroke (odds ratio 3.04), and less in small vessel occlusion than others (odds ratio 1.84). Ischemic stroke was associated with a longer (30 yrs) drinking habit than hemorrhagic stroke. Conclusions : To acquire more concrete conclusions on this theme, we need further and larger scale research.

중풍발병 예측인자로서 경항부강직과 안면경련에 관한 임상연구

최동준,한창호,이원철,전찬용,조기호,최선미,Choi, Dong-Jun,Han, Chang-Ho,Lee, Won-Chul,Jun, Chan-Yong,Cho, Ki-Ho,Choi, Sun-Mi 대한한방내과학회 2007 大韓韓方內科學會誌 Vol.28 No.4

Objectives : This study investigated the relationship between presymtoms and stroke subtype in early state of stroke patients. Methods : From Oct. 2005 to May 2007, 623 early state stroke patients were included. Patients were hospitalized within 30 days after the onset of stroke at DongGuk University International Hospital, Kyungwon University In-cheon Oriental Medical Hospital, or Kyung Hee University Oriental Hospital. We investigated general characteristics, stroke subtype, and presymtoms (facial spasm, neck stiffness). Results : Hemorrhagic stroke had more facial spasm than ischemic stroke(odds ratio 2.80). Small vessel occlusion had more neck stiffness than others(odds ratio 1.59). Conclusions : Facial spasm and neck stiffness would be valuable as stroke presymtoms.

급성기 중풍환자에서 중풍전조증과 중풍유형간의 상관성에 대한 임상연구

최동준,한창호,현진오,신원용,김용형,강아미,이원철,전찬용,조기호,Choi, Dong-Jun,Han, Chang-Ho,Hyun, Jin-Ho,Shin, Won-Yong,Kim, Yong-Hyung,Kang, Amy,Lee, Won-Chul,Jun, Chan-yong,Cho, Ki-Ho 대한중풍순환신경학회 2006 대한중풍.순환신경학회지 Vol.7 No.1

Objectives : This study was aimed to investigated the relationship between warning signs and stroke subtype in acute stroke patients. Methods : From Oct. in 2005 to Oct. in 2006, 409 acute stroke patients were included. Patients were hospitalized within 14 days after the onset of stroke in DongGuk University International Hospital, Kyungwon University In-cheon Oriental Medical Hospital, Department Cardiovascular and Neurologic Diseases(Stroke center) Kyung Hee University Oriental hospital. We investigated general characteristics, stroke subtype, and warning signs(facial spasm, neck stiffness). Results : Hemorrhagic stroke had more facial spasm than ischemic stroke. (odds ratio 3.60) Small vessel occlusion had more neck stiffness than others. (odds ratio 2.03) Conclusion : To acquire more concrete conclusions on warning signs, we need further and large scale of prospective researches.

CNN Mobile Net 기반 악성코드 탐지 모델에서의 학습 데이터 크기와 검출 정확도의 상관관계 분석

최동준,이재우 한국융합보안학회 2020 융합보안 논문지 Vol.20 No.3

At the present stage of the fourth industrial revolution, machine learning and artificial intelligence technologies are rapidly developing, and there is a movement to apply machine learning technology in the security field. Malicious code, including new and transformed, generates an average of 390,000 a day worldwide. Statistics show that security companies ignore or miss 31 percent of alarms. As many malicious codes are generated, it is becoming difficult for humans to detect all malicious codes. As a result, research on the detection of malware and network intrusion events through machine learning is being actively conducted in academia and industry. In international conferences and journals, research on security data analysis using deep learning, a field of machine learning, is presented. have. However, these papers focus on detection accuracy and modify several parameters to improve detection accuracy but do not consider the ratio of dataset. Therefore, this paper aims to reduce the cost and resources of many machine learning research by finding the ratio of dataset that can derive the highest detection accuracy in CNN Mobile net-based malware detection model. 현재 4차 산업혁명을 맞이하여 머신러닝과 인공지능 기술이 급속도로 발전하고 있으며 보안 분야에서도 머신러닝 기술을 응용하려는 움직임이 있다. 많은 악성코드가 생성됨에 따라 사람의 힘으로는 모든 악성코드를 탐지하기 어려워지고 있기 때문이다. 이에 따라 학계와 산업계에서는 머신러닝을 통해 악성코드나 네트워크 침입 이벤트를 탐지하는 것에 관한 연구가 활발히 진행되고 있으며 국제 학회와 저널에서는 머신러닝의 한 분야인 딥러닝을 이용한 보안데이터 분석 연구가 논문 발표되고 있다. 그러나 해당 논문들은 검출 정확도에 초점이 맞추어져 있고 검출 정확도를 높이기 위해 여러 파라미터들을 수정하지만 Dataset의 개수를 고려하지 않고 있다. 따라서 본 논문에서는 CNN Mobile net 기반 악성코드 탐지 모델에서 가장 높은 검출 정확도를 도출할 수 있는 Dataset의 개수을 찾아내어 많은 머신러닝 연구 진행에 비용과 리소스를 줄이고자 한다.

새로운 구조의 접촉식 미세구조 프로필러

최동준(Dong-June Choi),최재성(Jai-Seong Choi),최인묵(In-Mook Choi),김수현(Soo Hyun Kim) Korean Society for Precision Engineering 2002 한국정밀공학회지 Vol.19 No.3

금융회사 집행임원의 개선방안

최동준(Choi, Dong Jun) 서강대학교 법학연구소 2014 법과기업연구 Vol.4 No.2

In Korea, the amended corporation law introduced the Executive Officer System in the Apr. of 2011, which became effective in April 2012. And the Korean authorities (MOJ) announced Commercial Act revised bill in July 2013 by which all listed corporations should establish the Executive Officers if their asset amounts are over 2 billion won. But the Banks executed the de facto Executive Officer after the 1997 financial crisis by the recommendation of the Financial Supervisory Authority for the Corporate Governance improvement in the Financial Industry before the revision of corporation law, which is regulated by the articles of incorporation or provisions of the financial company, not by the corporation law. There can be thought the question whether the Executive Officer System under the Corporation Law applies to the banks under controled by the Banking Act, one of the Financial Laws. This article examines the following points. Firstly, arranges the differences of the Executive Officer System between the corporation law and the de facto Executive Officer on the financial companies in operating. Secondly, reviews on the previous questions to applying the Executive Officer System to the financial companies regarding to the issues about (i) the relations of the corporation law and the financial laws, (ii) the acceptance of the corporate governance improvement items in the financial laws, (iii) the effective administrative santions to the Executive Officers including the de facto Executive Officer. From the legal reviews to the related issues, the Executive Officer System in the corporation law should be applied to the fiananal companies and the Financial Supervisory Authority has to amend the individual financial law according to the size of capital or assets, kind of business of financial company analogically. The financial laws in harmony with the corporation law can contribute to the the effectiveness and profitability of financial industry.

주제별 논단 : 기타 ; 부동산담보신탁의 부가가치세 납세의무자에 관한 검토 -서울고등법원 2012. 9. 6 선고 2012누2421 판결을 중심으로-

崔東俊 ( Dong Jun Choi ) 한국금융법학회 2013 金融法硏究 Vol.10 No.2

This paper discusses who should be the tax payer of the Value-added Tax when real estate in trust is transferred in reference to a court case. The situation of the court case was that a trustor, who owned some commercial real estate, entered into a collateral trust agreement with the real estate trust company (the trustee) and received a certificate of beneficial interest in return. The trustor used the certificate as collateral to the nominated bank (the primary beneficiary) in order to get a loan for paying money of above buildings. The trustor defaulted the loan and the trust company sold the trust property to the primary beneficiary paying the debts to the creditor with the proceeds. In such transaction of the trust property, the Tax Tribunal decided that the trustor should pay the value-added tax, however the high court ruling was that the primary beneficiary should pay the tax. Tax Tribunal`s decision is based on the reasoning that in the case, the collateral trust was agreed for the collateral of the loan, therefore the transfer of the practical control to the building occurs on the day of the transfer of the building ownership after paying the debt, not on the day of the trust registration. Supreme Court`s decision was the established position from the preceding cases that the primary beneficiary of the transfer of the trust property should be the tax payer to the extent of being covered by his beneficial interest in case of ``trust where a third party beneficiary receives benefits from trust,`` while in case of ``trust where the trustor himself receives benefits from trust,`` the trustor should be the tax payer. The high court concluded that the type of trust of the case is the collateral trust and ``trust where a third party beneficiary receives benefits from trust,`` therefore the primary beneficiary should be the tax payer. This article analyzes the decision of the Tax Tribunal and the High Court`s judgment and raises two questions. First, the reference case in the district court decision is management?disposal trust, not collateral trust in the forementioned case. The type of trust is different in character and content. Second, a certificate of beneficial interest can be issued on collateral trust, not on management?disposal trust. As the structure and type of real estate trust varies depending on the trust goals, the decision on who should be the tax payer in the case of the transfer of the trust property needs detailed interpretation of the trust contract. The high court ruling gives a preview as follows : First, ``trust where the trustor himself receives benefits from trust`` exists in the collateral trust. Second, it does not conform to the fundamental nature of the value-added tax which is the multi-stage tax. Third, trustor makes unfair profits as there is no supply of goods to the primary beneficiary.

경계선 영역 정보를 이용한 밝기값 기반 스테레오 정합

崔東準(Dong-Jun Choi),金導鉉(Do-Hyun Kim),梁榮日(Yeong-Yil Yang) 大韓電子工學會 1998 電子工學會論文誌, S Vol.35 No.12

위성 ATM 망에서 TCP 표준 메커니즘 성능 실험 및 분석

최동준(Choi Dong-Joon),김내수(Kim Nae-Soo) 한국통신학회 2000 한국통신학회 학술대회논문집 Vol.2000 No.11