영상의 대각선 정보를 이용한 위성영상 해상도 향상 기법

최석원,정재헌,서두천,이동한,Choi, SeokWeon,Jeong, JaeHeon,Seo, DooChun,Lee, DongHan 한국우주과학회 2021 우주기술과 응용 Vol.1 No.1

In this paper, we will discuss techniques that can increase the resolution by 1.4 times without distortion or performance degradation of the original image, using diagonal information of the image. The applied method is to use the image information of 4 adjacent points without actual rotating the image by 45 degrees and enlarge and rearrange it according to the characteristics of the camera, so that the same physical concept as the actual 45 degrees can be applied. This is a concrete realization method that can improve the resolution by 1.4 times without deterioration of performance and a demonstration of this result. 본 논문에서는 영상의 대각선 정보를 이용하여 원영상의 왜곡이나 성능저하 없이 해상도를 1.4배 증가시킬 수 있는 기술 및 기법에 대해 논하고자 한다. 적용된 방법은 영상을 45도 돌리지 않고도 인접한 4점의 영상정보를 이용하여 카메라의 특성에 맞게 확대 및 재배열을 함으로써, 영상을 실제로 45도 돌리는 것과 동일한 물리적 개념을 적용할 수 있고, 원 영상의 왜곡이나 성능 저하 없이 해상도를 1.4배 증가시킬 수 있는 구체적 실현 방법 및 이에 대한 실증이다.

백제시대 흑색마연토기의 산출과 재현연구

최석원,이남석,이재황,이현숙,채상정,Choi, Suck Won,Lee, Nam Seok,Lee, Jae Hwang,Lee, Hyun Sook,Cbae, Sang Jeong 국립문화재연구원 2001 헤리티지:역사와 과학 Vol.34 No.-

Paekche black potteries are earthenwares begun to be produced at the beginning of Paekche Dynasty, around 3-century. They have typical Paekche style. Representative Paekche earthenwares are burnished black pottery, long oval shaped pots and shoulder pots. Among these, burnished black potteries are limited to Paekche in the occurrence site and age. Their numbers are a few. To reproduce black pottery, their compositions were analyzed. As a result of X-Ray analysis, quarts, feldspar, illite, muscovite, and anorthite were found on their surfaces and imsides spinel and vermiculite were found on their surfaces. Since same constituent minerals were found on surfaces and their insides, special other materials were not added to make surface black. With the showing vermiculite, they were made higher than $800^{\circ}C$. As a result of analysis, fine grained clay bad been influenced by the black smoke. Its luster was appeared by polishing with a big flat wooden spoon. The black color was made of smoking when the hot pot taken off from burning oven was covered with the wet pine leaves.

중적외선 센서 위성 영상의 상온 온도 정보 추출 가능성 및 정확도

최석원,서두천,이동한,Choi, SeokWeon,Seo, DooChun,Lee, DongHan 한국우주과학회 2021 우주기술과 응용 Vol.1 No.3

It was common knowledge in textbooks that images acquired using mid-infrared ray were not suitable for measuring temperature near room temperature. But a recent satellite image using a mid-infrared sensor show the possibility that the result measured using the mid-infrared sensor can also measure the temperature near room temperature. In this paper, the possibility and accuracy of extraction room temperature information from satellite images with mid-infrared sensors are reviewed. The mid-infrared satellite image reviewed in this paper showed the temperature of room temperature well, and regarding the reliability as an absolute value of the measured temperature, the effect of the heat transfer amount due to the direct reflection of sunlight on the surface and the effect of the infrared absorption amount absorbed in the atmosphere can be seen as a relatively small or constant value. However, the problem of uncertainty in the radiation coefficient due to physical properties, which is the limit of the non-contact thermometer, remained a problem to be solved. 중적외선을 이용하여 획득한 영상은 상온 부근의 온도 측정에는 적당하지 않다는 것이 교과서적 상식이었으나, 최근 중적외선 센서를 이용한 위성 영상을 살펴보면 중적외선 센서를 이용하여 측정한 결과물도 상온 부근의 온도를 측정할 수 있다는 가능성을 보여주고 있다. 본 논문에서는 중적외선 센서를 가지는 위성영상의 상온 온도 정보 추출 가능성 및 정확도에 대해 살펴보고자 한다. 논문에서 검토된 중적외선 위성영상은 상온 부분의 온도를 잘 표시하였으며, 측정된 온도의 절대값으로서의 신뢰성에 관해서는, 태양광의 지표면 직접 반사에 의한 열전달량 영향과 대기에서 흡수되는 적외선 대기 흡수량의 영향은 비교적 작거나 일정한 값으로 볼 수 있지만, 비접촉식 온도계의 한계인 물성치의 의한 복사 계수(emissivity)의 불확실성 문제는 여전히 해결해야할 문제로 남아 있게 되었다.

고분자 안정화 블루상(BP) 액정 기술

최석원,Choi, Seok-Won 한국정보디스플레이학회 2009 인포메이션 디스플레이 Vol.10 No.1

A Study on the Way of Strengthening the Environmental Education in High School ( Centered on the Subject of Earth Science )

최석원,정희,이미경 ( Suck Won Choi,Hee Jong,Mi Kyoung Lee ) 한국지구과학회 1992 지구과학교육 학술발표회 Vol.1992 No.-

농용 트랙터 타이어의 공기압 유지 실태 조사

최석원,김경욱 ( S . W . Choi,K . U . Kim ) 한국농업기계학회 1997 한국농업기계학회 학술발표논문집 Vol.2 No.2

지향성을 가지고 동작하는 위성 안테나 진동저감 장치

최석원,용상순,SeokWeon Choi,Sang-Soon Yong 한국우주과학회 2022 우주기술과 응용 Vol.2 No.3

Although the magnitude of the disturbance caused by the driving of the motor operated to secure the high-speed and precise directivity of the antenna is small, it acts as a major cause of impairing the image quality of the observation satellite, which requires precision directing performance. In order to acquire high-resolution image information through the improvement of the high-resolution observation satellite, proper vibration isolation and reduction design are required so that jitter generated when the directional antenna motor is driven is not transmitted to the main mission equipment. In this paper, the development process of the directional antenna vibration reduction device applied to real satellites and the effect of micro vibration reduction before and after application will be examined. This device was designed as a way to significantly improve the jitter problem by replacing only one gear in the directional antenna driving unit with a spring damper gear without any additional interface equipment. It was first applied and launched to a high-resolution earth observation satellite, and has been successfully operated so far.

천안 운전리 청동기 유적지에서 출토된 무문토기의 정량분석, 산지 및 소성조건

최석원,이찬희,오규진,이효민,이명성,Choi, Seok-Won,Lee, Chan-Hee,Oh, Kuy-Jin,Lee, Hyo-Min,Lee, Myeong-Seong 국립문화재연구원 2003 헤리티지:역사와 과학 Vol.36 No.-

The plain coarse pottery from the Unjeonri Bronze Age relic sites in the Cheonan, Korea were studied on the basis of clay mineralogy, geochemistry and archaegeological interpretations. For the research, the potteries are utilized at the analysis for 6 pieces of plain coarse potteries. Color of the these potteries are mainly light brown, partly shows the yellowish brown to reddish brown. The interior, surface and inside of the pottery appear as different colors in any cases. Original source materials making the Unjeonri potteries are used of mainly sandy clay soil with extreme coarse grained irregularly quartz and feldspar. The magnetic susceptibility of the Unjeonri pottery range from 0.20 to 1.20. And the Unjeonri soil's magnetic susceptibility agree almost with 0.20 to 1.30. In the same magnetization of soil and pottery, the results revealed that the Unjeonri soil and low material of pottery are same produced by identical source materials. The Unjeonri potteries and soil are very similar patterns with all characteristics of soil mineralogy, geochemical evolution trend. The result seems to be same relationships between the behavior and enrichment patterns on the basis of a compatible and a incompatible elements. Consequently, the Unjeonri potteries suggest that made the soil to be distributed in the circumstance of the relic sites as the raw material are high in a greater part. In the Unjeonri soil, the kaolinite is common occurred minerals. However, in the Unjeonri pottery, the kaolinite was not detected in all broken pieces. The kaolinite was presumed to destroy crystal structure during the firing processes of over $550^{\circ}C$. The quartz is phase transition from ${\alpha}$-quartz to ${\beta}$-quartz at $573^{\circ}C$, but the Unjeonri pottery did not investigated any phase transition evidences of quartz. The chorite was detected within the mostly potteries and soils. As the results, the Unjeonri potteries can be interpreted by not experiencing a firing temperature over $800^{\circ}C$. The colloidal and cementing materials between the quartz and low materials during the heating did not exist in the internal part of the potteries. An any secondary compounds by heating does not appear within the crack to happen during the dry of the pottery. The hyphae group are kept as it is with the root tissue of an organic matters to live in the swampy land. In the syntheses of all results, the general firing condition to bake and make the Unjeonri pottery is presumed from $550^{\circ}C$ to $800^{\circ}C$. However, the firing condition making the Unjeonri pottery can be different firing temperature partially in one pottery. Even, the some part of the pottery does not take a direct influence on the fire.

광학위성 영상에 대한 분석요구데이터 (ARD) 의 요구조건 및 국제기술동향

최석원(SeokWeon Choi),이동한(DongHan Lee),유대훈(Daehoon Yoo) 한국항공우주학회 2022 한국항공우주학회 학술발표회 논문집 Vol.2022 No.11

洪業(William Hung)이 구축한 杜詩 읽기의 새로운 방법론

최석원 ( Choi¸ Seokwon ) 한국중국어문학회 2021 中國文學 Vol.108 No.-

This study considered William Hung’s reading of Du-fu’s poems, who stood on the boundary between the East and the West, to examine the diversity of interpretation according to changes in time and space. As can be seen from the early evaluation of Du-fu presented by Liang-Qichao, the evaluation of modern Du-fu’s poems shows a different aspect from that of the traditional period. William Hung attempted to identify the creative date of Du-fu’s work and index the Du-fu’s works, reflecting a change in the perception of Du-fu’s poetry after modern times, and a new academic trend in the West. It is said that this led to changes in reading Du-fu’s poetry, which is different from traditions.