굴절조절내사시의 임상경과: 대상부전의 발생과 안경의 중단

문호석,백혜정.Ho Seok Moon. MD. Hae Jung Paik. MD. PhD 대한안과학회 2012 대한안과학회지 Vol.53 No.4

Purpose: To analyze clinical characteristics of refractive accommodative esotropia related with the occurrence of decompensation and cessation of spectacle use. Methods: The records of 60 patients with refractive accommodative esotropia were reviewed. Patients were divided into a control or decompensation group. Twenty-nine patients in the control group who were followed up for long-term were divided into two groups based on spectacle use. Results: In the decompensation group, the amounts of near and distant esodeviation without correction at the first visit and the frequency of failure to achieve central fusion were significantly greater than the control group (p < 0.05). Ages at the onset of esodeviation and first visit, the amount of hyperopia at the first visit, the amounts of controlled esodeviation, amblyopia, and anisometropia were not significantly different between the two groups (p > 0.05). In the group that no longer required glasses, the age at the first visit was greater and the amount of hyperopia and the near and distant esodeviations without correction at the first visit were significantly greater than the glasses-wearing group (p < 0.05). Age at the onset of esodeviation, the amount of controlled esodeviation, refractive change per year, stereopsis, amblyopia, and anisometropia were not significantly different between the two groups (p > 0.05). Conclusions: In refractive accommodative esotropia, a larger amount of esodeviation at the first visit and failure to achieve central fusion are risk factors for developing decompensation. The older age at diagnosis and smaller amounts of hyperopia and esodeviation at the first visit are predictive factors for the cessation of spectacle use. J Korean Ophthalmol Soc 2012;53(4):553-558

원시굴절부등을 동반한 굴절조절내사시의 임상양상

문호석,백혜정.Ho Seok Moon. MD. Hae Jung Paik. MD. PhD 대한안과학회 2013 대한안과학회지 Vol.54 No.4

Purpose: To investigate the clinical features of refractive accommodative esotropia with hyperopic anisometropia. Methods: Retrospective chart review was performed for 71 patients with refractive accommodative esotropia and hyperopic anisometropia. Patients were divided into isometropia and anisometropia groups, as well as disappeared anisometropia and maintained anisometropia groups. Clinical features such as amblyopia, stereopsis, decompensation, and cessation of spectacle use were reviewed. Results: Anisometropia was found in 14 patients (19.7%). Amblyopia was detected in 35% of the patients in the isometropia group and 67% of the patients in the anisometropia group on the first visit (p = 0.048), but improved to 14% in the isometropia group and 21% in the anisometropia group on the final visit. Good stereopsis was reported in 28% of the patients in the isometropia group and 21% of the patients in the anisometropia group on the first visit, and improved to 67% in the isometropia group and 79% in the anisometropia group on the final visit. There were no differences of prevalence of decompensation and cessation of spectacle use between the 2 groups. Cases with disappeared anisometropia on the final visit were observed in 42.9% of the patients. Disappearance of anisometropia was not related with amblyopia, stereopsis, decompensation, and cessation of spectacle use. Conclusions: Although refractive accommodative esotropia accompanied by anisometropia has a greater chance to show amblyopia on the initial visit, good prognosis can be expected when the patients are carefully managed with hyperopic correction and occlusion therapy.

워게임모델간 근접전투 피해평가 모의논리 일치에 관한 연구 : 제병협동통합연동체계를 중심으로

문호석,김형세,황명상,배현웅,이동근,Moon, Ho-Seok,Kim, Hyung-Se,Hwang, Myung-Sang,Bae, Hyun-Wung,Lee, Dong-Keun 한국국방경영분석학회 2011 한국국방경영분석학회지 Vol.37 No.1

본 논문에서는 앞으로 개발되어 전력화 예정인 제병협동통합연동체계에서 모델간 연동으로 인해서 발생가능한 문제점 중의 하나인 전투 피해평가 차이를 극복할 수 있는 근접전투 피해평가 전문가시스템을 제안하였다. 제병협동통합연동체계에서 서로 다른 모델에 속한 부대간 교전이 발생할 때에 피해평가 결과가 많은 차이를 보이고 있었는데, 이러한 피해평가의 차이는 제병협동통합연동체계의 신뢰성 문제와 직관되는 중요한 부분으로 반드시 해결되어야 할 부분이다. 이러한 문제점을 해결하고 신뢰할 만한 근접전투 피해평가를 위해 전문가시스템을 의사결정나무를 이용해서 제안하였다. 제안하는 전문가시스템은 실험 결과를 통해서 신뢰할 만한 결과를 보였고, 별도의 시스템으로 운용하지 않고 기존 모델에 모듈형식으로 탑재되기 때문에 시스템 측면에서 제병협동통합연동체계를 보다 단순화 시킬 수 있고 예산 절감의 효과를 기대할 수 있다. In this paper, we propose a new close combat expert system to overcome the difference of combat damage assessments between combat units belong to their own model in Combined Arms Integrated Interoperability System(CAIIS) which will be deployed in the early future. When it happens to engage in a battle among combat units belong to their own model in CAIIS, the result of damage assessment is different severely. This is related to CAIIS's confidence and need to be overcome. We propose the expert system for close combat damage assessment with a decision tree. Simulation results show that the proposed expert system is valid well. Because the proposed expert system is made not as an independent system but as an inner module type of CAIIS, CAIIS will be simpler system than we expect. And we will hope to reduce the cost of CAIIS.

컴퓨터 그래픽스 및 영상처리를 이용한 문화 원형 복원 전문가시스템 개발

문호석(Ho Seok Moon),손명호(Myung Ho Sohn) 한국컴퓨터정보학회 2006 韓國컴퓨터情報學會論文誌 Vol.11 No.6

본 논문에서는 컴퓨터 그래픽스와 영상 처리를 통해서 훼손된 문화재 조각들을 복원하는 전문가 시스템을 제안한다. 제안하는 시스템은 글자가 새겨져 있는 평평한 면이 있는 조각들을 대상으로 하여 구축하였고, 조각들간의 상대적인 정확한 위치를 찾아 복원한다. 조각난 물체들을 정합하는 과정은 세 단계로 이루어진다. 첫 번째 단계는 조각난 물체의 정면을 찾고, 정면에 새겨져 있는 글자들을 추출하여 최소자승법을 통해 조각의 방향을 정렬하는 과정이다. 두 번째 단계에서는 조각들이 정합될 대략적인 방향을 벡터 내적을 통해서 결정한다. 세 번째 단계에서는 기하학적인 에러 및 RGB에러 등을 통해서 조각의 세부적인 방향을 결정한다. 본 논문에서 제안하는 시스템은 조각을 정합하는데 있어서 3차원 물체를 정합 전에 정렬하는 방법을 통해서 2차원적인 이동 연산만으로 정합될 수 있도록 하여 계산량을 줄였다. 또 한 구체적인 문화재를 대상으로 실험을 하여 그 성능을 입증하였다. We propose a new expert system for recovering the broken fragments of relics into an original form using computer graphics and image processing. This paper presents a system with an application to tombstones objects of flat plane with letters carved in for assembling the fragments by placing their respective fragments in the right position. The matching process contains three sub-processes: aligning the front and letters of an object, identifying the matching directions, and determining the detailed matching positions. We apply least squares fitting, vector inner product, and geometric and RGB errors to the matching process. It turned out that 2-D translations via fragments-alignment enable us to save the computational load significantly. Based on experimental results from the damaged cultural fragments, the performance of the proposed method is illustrated.

문화원형 디지털 복원기술 : 컴퓨터 그래픽스 및 영상처리를 활용한 시스템의 통합 기능을 중심으로

문호석(Ho Seok Moon),손명호(Myung Ho, Sohn) 한국IT서비스학회 2009 한국IT서비스학회지 Vol.8 No.4

The industry of cultural digital contents has been regarded as the main next generation industry. Recently techniques for restoring cultural assets and the multiple usage of those have been developed in out country. Using computer graphics and image processing techniques, many cultural assets have been restored. If the focus for researches and supports to cultural assets restoration grows rapidly, we will create cultural and economical added-values and get the benefit of that technology. In this paper, we introduce the techniques for restoring cultural assets focused on computer graphics and image processing techniques.

문화재의 문자 복원을 위한 전문가 시스템 개발:영상처리 및 컴퓨터 그래픽스 활용을 중심으로

문호석(Ho Seok Moon),손명호(Myung Ho Sohn) 한국IT서비스학회 2008 한국IT서비스학회지 Vol.7 No.4

We propose expert system for restoration the original character form of ancient relics based on image processing and computer graphics. Letters engraved in relief like relics and intaglio like curved tombstones and letters engraved in plane or curved part of cultural asset may have been broken by a lot of rubbed copy, a long time and tide. In this paper, we suggest a new method for extracting and recovering the broken letters of cultural asset into an original form by using Z-map, morphological filter, and high frequency filter. Based on the suggested method, we develop the character recovering system.

장면전환 발생시 예상 비트 조정을 통한 MPEG - 2 비디오 부호화 비트율 제어 알고리즘

문호석(Ho-seok Moon),박상성(Sang-sung Park),손명호(Myung-ho Sohn),장동식(Dong-sik Jang) 한국정보과학회 2004 정보과학회논문지 : 소프트웨어 및 응용 Vol.31 No.12

장면전환에 따른 화질열화는 예상 비트량과 실제 부호화량의 차이가 많을 때 발생한다. 특히 장면전환이 P화면에서 발생된 경우에는 장면전환이 발생된 P화면 뿐만 아니라, P화면을 참조하는 화면들의 화질에 심각한 열화가 발생한다. 본 논문에서는 장면전환이 발생했을 때 부적절한 비트율 제어의 원인을 토대로 장면전환 화면과 이후 화면들의 화질을 개선하는 방법을 제시하였다. 장면전환 화면에는 추가비트를 할당하는 기존 방법과 예상 비트를 인트라 화면의 부호화 수준으로 할당하는 새로운 방법을 적용하였다. 그리고 장면전환 이후 화면들에는 예상 비트 할당을 장면전환 발생이전 화면의 부호화 수준으로 할당하는 방법을 제안하여 화질을 개선시켰다. 실험 결과 제안하는 알고리즘이 기존 알고리즘보다 화질향상이 있었고, TM5와 비교해서는 0.5∼1.2dB의 PSNR 향상을 보였다. The decrease of visual quality at scene change occurs when the difference between the amount of target bits and actual coding is high. Especially, scene change at the P-picture can lead to severely degrade visual qualities at itself and the pictures referencing it. In this paper, under the occurrence of scene change, we propose a new method, based on the analysis of existing inaccurate bits allocation, to improve the visual qualities of scene-changed and following pictures. The method allocates extra bits to scene-changed picture and changes them upto the level of the complexity of intra picture. Also, the method changes target bits of following pictures upto the complexity of picture prior to the scene change. Computer simulation shows that the proposed method has improved 0.5-1.2 dB higher than TM5 method in terms of PSNR.

Z-map과 모폴로지 필터를 이용한 문화재 문자 복원

문호석(Ho Seok Moon),손명호(Myung Ho Sohn) 한국컴퓨터정보학회 2006 한국컴퓨터정보학회지 Vol.14 No.2

본 논문에서는 글자가 새겨져 있는 마모된 문화재의 글자를 Z-map과 영상처리를 이용해 복원하는 새로운 알고리즘을 제시한다. 문화재에 새겨져 있는 글자는 많은 탁본을 통해서 또는 세월이 흐름에 따라 마모되어 최초의 상태와 다른데, 마모된 부분을 찾고 보강하는 작업이 필요하다. 이 작업을 수동으로 하게 되면 여러 가지 문제점이 발생하게 되는데, 자동으로 복원하는 방법이 필요하다. 본 논문에서는 이러한 글자 복원에 대한 구현 가능한 알고리즘을 제안하였다. 팔만대장경을 대상으로 하였고, Z-map과 모폴로지 필터가 이 과정에 사용되었다. In this paper. we propose a new algorithm for recovering the broken letters of relics into an original form by using Z-map and image processing. The letters of relics may have been broken by a lot of rubbed copy and a long time and tide. They need to be restored. But the manual reconstruction is a very tedious and laborious task. Thus. it is necessary to automate the restoration process. This paper presents a realistic algorithm with an application to Tripitaka Koreana by using Z-map and morphological filter.

의사결정나무를 이용한 근접전투전문가시스템

김형세,문호석,이동근,황명상,김영국,Kim, Hyung-Se,Moon, Ho-Seok,Lee, Dong-Keun,Hwang, Myung-Sang,Kim, Young-Kuk 한국국방경영분석학회 2010 한국국방경영분석학회지 Vol.36 No.3

본 논문에서는 훈련용 워게임모델의 근접전투 피해평가를 위한 새로운 근접전투전문가시스템을 제안하였다. 군에서 사용하고 있는 워게임모델에서 피해평가 모의논리는 아주 중요한 모의가능이다. 현재, 육군의 군사단급 워게임모델인 창조21 모델에서는 근접전투 피해평가의 핵심기능이 창조21 모델에서 계산되지 않고, 공개소스와 내부논리를 알 수 없는 미군에서 제작한 근접전투전문가시스템(일명 COBRA)에서 별도로 계산되고, 이 결과가 네트워크를 통해 창조21 모델로 전송되어 근접전투에 대한 피해평가가 이루어진다. 본 논문에서는 COBRA를 대체할 수 있는 근접전투전문가시스템을 의사결정나무를 이용해서 제안하였다. 제안하는 시스템은 실험결과 COBRA와 유사한 성능을 보였고, 시스템의 계산량이 적었고 군사작전 상황에 적합하였다. In this paper, we propose a new expert system for close combat in military war game model for training. Simulation logic for damage assesment is one of the main simulation functions in military war game. In Changcho 21's model which is the war game model for Republic of Korea Army corps and division, the main function of close combat's damage assessment has not been calculated by Changcho 21's model, but by COBRA which was made by US Army and has been the expert system for close combat. Results which were calculated in COBRA were sent to Changcho 21's model through a cable network. And Changcho 21's model finally calculated the value of damage assessment with the results. In this paper, we develop an new expert system for close combat using decision tree. The experimental results show that the proposed expert system has similar performance to COBRA and has less computing complexity. And it can substitute for COBRA and be applicable to battlefield.

안허혈 증후군을 동반한 급성 망막중심동맥폐쇄의 치료 1예

이종환,문호석,남동흔,이대영,Jong Hwan Lee,Ho Seok Moon,Dong Heun Nam,Dae Yeong Lee 대한안과학회 2014 대한안과학회지 Vol.55 No.8

Purpose: We report a case of treatment of acute central retinal artery occlusion (CRAO) with ocular ischemic syndrome (OIS). Case summary: A 72-year-old man presented with acute loss of vision in the right eye on that day. At initial examination, visual acuity tested positive for light sensitivity in the right eye. Fundus examination demonstrated a visible embolus at the central retinal artery overlying the optic disc head and a cherry-red spot in the fovea. Fluorescein angiography revealed that filling of the choroidal circulation was delayed, and the arteriovenous transit time was even further delayed. Carotid angiography showed marked stenosis within the right internal carotid artery. Laboratory tests included blood tests for hypercoagulability evaluation, for which the results were non-specific. To treat acute CRAO with OIS in the right eye, transluminal Nd:YAG laser embolectomy (TYE) was performed twice, and carotid angioplasty with stenting was conducted within the stenosed internal carotid artery. One month after the TYE procedure and carotid stenting, the patient’s visual acuity improved to 0.06 and the arteriovenous transit time was within normal limits on fluorescein angiography. Conclusions: The visual prognosis in eyes with CRAO plus an associated choroidal circulatory disturbance is extremely poor. However, we experienced and reported a case of CRAO with OIS treated successfully through a prompt TYE procedure and carotid angioplasty with stenting. J Korean Ophthalmol Soc 2014;55(8):1242-1247