• 한국산업융합학회 논문집
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• 제26권6_2호
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• pp.1063-1071
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• 2023

Unmanned aerial vehicles (UAVs, drones) are becoming increasingly useful in a variety of fields. Advances in UAV and camera technology have made it possible to equip them with ultra-high resolution sensors and capture images at low altitudes, which has improved the reliability and classification accuracy of object identification on the ground. The distinctive contribution of this study is the derivation of sensor-specific performance metrics (GRD/GSD), which shows that as the GSD increases with altitude, the GRD value also increases. In this study, we identified the characteristics of various onboard sensors and analysed the image quality (discrimination resolution) of aerial photography results using UAVs, and calculated the shooting conditions to obtain the discrimination resolution required for reading ground objects.

• 한국의류산업학회지
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• 제18권3호
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• pp.261-271
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• 2016

The aim of this study was to gain an understanding of the element playfulness in fashion photographs related to openness and multiple significance in contemporary art. A total of 105 fashion photographs from US and UK Vogue magazine editorials and advertisements for the last five years were selected for the study. The photographs were analyzed in two main categories - the contextual element of themes, and the elements of visual expression; composition, models, objects and editing technology. The element of playfulness in the photographs were found to be divided into themes of infantile fantasy, social satire and situational dissonance, and elements of visual expression were found to express image distortion, expansion, exaggeration, reduction, and optical illusions. A photography type termed as infantile fantasy and social satire have descriptive characteristics and usually deliver the message by using models and objects to present a certain situation or express social satirical viewpoint and reflective attitude by using objects and photographic skills. A photography type termed as situational dissonance is characterized by immediately understood expressions and usually clarify the message by using a photographic technology such as editing the printed image or expect the model to express an exaggerated poses and ridiculous expressions, causing an optical illusion. Visually expressed and composed scene using composition, models, objects and editing technology is a specific character of photograph and due to the advances in computer editing technology it has been able to express the various playfulness.

• 농촌계획
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• 제24권4호
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• pp.15-25
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• 2018

This study was designed to understand the change of rural landscape and to consider problems followed by development restrictions lifted for Neobiul Village in Ansan City, Korea. Physical landscape changes were comprehended by a field study and interview with local residents, and the residents' perception regarding the landscape changes were analyzed with the REP investigation method. The results can be summarized into the following three points: First, due to the lift of development restrictions and the deregulation of land use, the number of factories and warehouses for rent increased, which became a new source of income for the village. Second, the residents' complaints increased due to the increased traffic volume and waste from a sudden influx of factories and warehouses, which could not be handled by a small farming village. Third, a mix of landscape combining both city and farming village was formed due to the influx of external capital and the need of rental income, although the residents rather wanted Neobiul Village to become a residential village than a factory location. Furthermore, even in the farmlands near the village where development restrictions have not been lifted, the level of dependence on the farming industry has decreased as a consequence of the increase in farmland rent and weekend farms. This paper confirmed that the change of rural landscape followed by lifted development restrictions affects the everyday life of residents living in Neobiul Village. This study has significant implications in that it suggests a case showing the effects of national policies such as lifting development restrictions for rural villages in suburban areas.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2016년도 추계학술대회
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• pp.430-432
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• 2016

최근 무인항공기를 지칭하는 드론 관련 산업이 미래를 이끌 신산업으로 부상하고 있다. 즉 드론 테크산업을 말하자면 스마트폰 시장과 흡사하다고 본다. 통신의 매체를 떠나 카메라,게임기등의 역할을 하고있는 스마트폰, 아마 드론이 그럴 것이다. 군사적 목적으로 로봇 비행체로만 인식되었던 드론이 이제 어른들의 장남감 또는 항공영상등으로 일상 생활에 근접하고 있는 실정이다. 본 연구논문에서는 고령화 되어가는 인력을 드론테크산업에 유입하고져 연구를 해 보았다. 드론의 조종기술, 항공촬영등이 고령층하고는 무관 할줄 알았던 사실이 현실화로 검증되어 일자리창출로 연계할수 있는 연구결과를 나타내 보기로 한다.

• 한국항행학회논문지
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• 제18권5호
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• pp.409-414
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• 2014

관광산업은 주 5일 근무제 시행 이후 여가시간이 증가함에 따라 양질의 성장을 보이고 있다. 관광산업은 전자 통신의 발달에 힘입어 다양한 형태의 문화와 결합하여 21세기 고부가가치 산업으로 각광받고 있다. 특히 삼면이 바다인 우리나라는 국민소득이 증가함에 따라 해양레저산업에 더욱 관심을 갖고 있다. 해양수산부는 막대한 정책지원을 통해 해양관광진흥계획을 수행하고 있으며, 어촌지역에 문화를 융합하여 타 지역 관광객 유치를 위해 노력하고 있다. 본 연구를 통한 콘텐츠를 활용하여 정책자금이 동원되는 활동을 바르게 모니터링하고, 고부가가치 관광 산업을 육성하기 위한 유용한 콘텐츠 활용 전략을 제시하였다.

• 디지털산업정보학회논문지
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• 제14권4호
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• pp.69-77
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• 2018

The malignant melanoma accounts for about 1 to 3% of the total malignant tumor in the West, especially in the US, it is a disease that causes more than 9,000 deaths each year. Generally, skin lesions are difficult to detect the features through photography. In this paper, we propose a computer-aided diagnosis algorithm based on deep learning for classification of malignant melanoma and benign skin tumor in RGB channel skin images. The proposed deep learning model configures the tumor lesion segmentation model and a classification model of malignant melanoma. First, U-Net was used to segment a skin lesion area in the dermoscopic image. We could implement algorithms to classify malignant melanoma and benign tumor using skin lesion image and results of expert's labeling in ResNet. The U-Net model obtained a dice similarity coefficient of 83.45% compared with results of expert's labeling. The classification accuracy of malignant melanoma obtained the 83.06%. As the result, it is expected that the proposed artificial intelligence algorithm will utilize as a computer-aided diagnosis algorithm and help to detect malignant melanoma at an early stage.

• 전자통신동향분석
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• 제33권3호
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• pp.78-88
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• 2018

As the unmanned aerial vehicle industry and its related technologies grow each year, the number of abuse cases caused by drones is increasing. In addition to the invasion of privacy caused by indiscriminate photography, terrorism using unmanned aerial vehicles, which have a low detection probability, high location accuracy, and the capability of targeting people or places, as well as carrying chemicals, radiation materials, and small bombs, is becoming a significant problem around the world. Accordingly, many companies are developing anti-drone solutions that consist of various technologies such as radar, EO/IR cameras, and RF jammers to detect and disable unmanned aerial vehicles. This article briefly introduces the recent R&D trends and technical levels of anti-drone technologies.

• 수산해양기술연구
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• 제32권3호
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• pp.302-309
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• 1996

Cavitation erosion-corrosion implies damage to materials due to the shock pressure or shock wave that results when bubbles form and collapse at a metal surface within a liquid. If the liquids corrosive to the material, a condition typically encountered in industry, the component materials may suffer serious damage by a combination of mechanical and electrochemical attack. To suppress cavitation erosion as well as cavitation erosion-corrosion to hydraulic equipments, innovations such as the improvement in the geometric design of the equipment or the selection of suitably resistant construction materials are necessary. This study was tested by using the piezoelectric vibrator with 20kHz, 24${\mu}$m for cavitation generation. And also, the vibratory cavitation erosion-corrosion tests on commercial mild steel SS41were carried out. We carefully observed the erosion pattern and surface photography. The geometrical mechanism of pit growth, which is to be likely these processing; shallow typelongrightarrowundercut typelongrightarrowwide shallow type.

• 광학세계
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• 통권131호
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• pp.50-53
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• 2011

사진의 발명 초기, 가장 널리 촬영되었던 것이 풍경사진이다. 풍경사진의 역사는 사진술의 발명가인 조세프 니세포르 니에프스의 세계 최초 풍경사진 <르 그라의 집 창에서 내다 본 조망, 1827년>부터 정치적인 목적으로 촬영된 비송형제의 알프스에서 찍은 풍경사진, 미국의 근대 사진을 이끌었던 알프레드 스티글리츠의 구름을 주제로한 <이퀴벌런트 Equivalent) 시리즈, 리얼리티에 입각한 'f64' 그룹, 현대의 풍경을 표현했던 '뉴토포그래픽스' 작가에 이르기까지 다양하며 광범위하다. 이렇듯 풍경사진은 자연이나 인공적인 풍경을 담아내는 일차적인 표현 방법을 넘어서 그 시대와 목적에 따라 달리 표현되며 작가 자신의 내면적 세계를 담아내는 행위이다. 글로벌한 1인 미디어가 대거 등장하면서 사진은 더욱 친숙하고 밀접하게 다가온다. 그 중 대표적인 것으로 여행에서의 풍경사진을 꼽을 수 있다. 우리는 개인이 직접 접해보지 못했던 대자연의 장엄함과 시골의 소박한 자연풍경을 사무실과 거실의 모니터 앞에서 쉽게 감상할 수 있다. 그러나 이 아름다운 풍경을 촬영자의 내면 그대로 담아내는 일은 좀처럼 쉽지 않다. 우리의 눈과 마음으로 바라보는 3차원 또는 4차원의 풍경을 사진이라는 2차원적 평면으로 표현할 수 있는 기본적인 촬영방법을 알아보자.

• 항공우주시스템공학회지
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• 제15권6호
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• pp.33-41
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• 2021

As interest in drones controlled by remote technology rapidly increases worldwide, drones are used in many fields such as military, rescue, and transportation as future innovations in many countries. In particular, as the drone has been spotlighted as a new future strategic industry, it is also used for public purposes such as disaster relief and crime investigation. However, security concerns such as the penetration of major national facilities, collisions with aircraft, and the possibility of privacy infringement due to aerial photography are also being raised. Unlike the increased interest in drones, there have been few studies on drone use, drone safety, and public attitudes toward drone use. This paper analyzed the perceptions of drone attitudes, drone stability and policy support for drones for Korean and United Kingdom.