• Title/Summary/Keyword: 해상장비

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Quantitative Evaluation of Super-resolution Drone Images Generated Using Deep Learning (딥러닝을 이용하여 생성한 초해상화 드론 영상의 정량적 평가)

  • Seo, Hong-Deok;So, Hyeong-Yoon;Kim, Eui-Myoung
    • Journal of Cadastre & Land InformatiX
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    • v.53 no.2
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    • pp.5-18
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    • 2023
  • As the development of drones and sensors accelerates, new services and values are created by fusing data acquired from various sensors mounted on drone. However, the construction of spatial information through data fusion is mainly constructed depending on the image, and the quality of data is determined according to the specification and performance of the hardware. In addition, it is difficult to utilize it in the actual field because expensive equipment is required to construct spatial information of high-quality. In this study, super-resolution was performed by applying deep learning to low-resolution images acquired through RGB and THM cameras mounted on a drone, and quantitative evaluation and feature point extraction were performed on the generated high-resolution images. As a result of the experiment, the high-resolution image generated by super-resolution was maintained the characteristics of the original image, and as the resolution was improved, more features could be extracted compared to the original image. Therefore, when generating a high-resolution image by applying a low-resolution image to an super-resolution deep learning model, it is judged to be a new method to construct spatial information of high-quality without being restricted by hardware.

The Role am Evolution of Traditional Aids to Navigation in an e-Navigation era (e-Navigation 시대를 향한 기존 항로표지의 역할 및 진화)

  • Jeong, Jong-Kwon
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2010.04a
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    • pp.473-480
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    • 2010
  • A key objective is to meet the requirements for safe marine transport and protection of the marine environment by providing a comprehensive mix of Aids to Navigation commensurate with the amount of traffic and the degree of risk. The development of e-Navigation is driven by the compelling need to equip the master of a vessel and those ashore responsible for the safety of shipping with modem, proven tools to improve the reliability of marine navigation and communications. Although position fixing using GNSS is widely used, radar and visual AtoNs continue to be needed to provide safe, secure and environmentally clean navigation. The paper considers the role, evolution and future provision of traditional aids to navigation in an e-Navigation environment from both a technical and mariner perspective.

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HF Data Communication Service Using SSB Modems for Maritime Applications (SSB 모뎀을 이용한 해상용 HF 데이터 통신 서비스)

  • Choo, Young-Yeol;Jung, Da-Un
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.15 no.12
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    • pp.2549-2554
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    • 2011
  • This paper describes on development of integrated interface and applications to support stable digital data communication service for small and midium sized crafts exploiting SSB modems and HF wireless sets. Firstly, integrated interface module between GPS (Global Positioning System) and communication devices was developed. Secondly, maritime map was implemented into a display terminal to provide location tracking service and voyage planning function. In addition, condition monitoring service of crafts and fishing report functions as well as alarm functions were developed to support secure fishery. Results of performance measure on developed application services shows that error rate was less than 3% and communication delay was shorter than 1 second when a message length was less than 1 Kbyte along with one-to-many communication type.

The improvement of maritime data communication systems for e-Navigation (e-Navigation 대응 해상 데이터통신 시스템 개선)

  • Jung, Sung-Hun;Yang, Gyu-Sik;Jeong, Gi-Ryong;Park, Dong-Kook;Kim, Jeong-Chang
    • Journal of Advanced Navigation Technology
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    • v.15 no.6
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    • pp.939-945
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    • 2011
  • We show a new scheme and implementation of maritime data communication systems for GMDSS ship which performs e-Navigation and removes the functional limitation of those systems through comparing to service fee, call processing reliability, and bit rates of all of those systems within communication range at sea. We confirmed available each frequency band communication and application services at sea by experimental result with proposed new system, MF/HF band being useful to a short text message service, VHF band to 9600bps email service, Fleet Broadband Maritime Satellite system to one or more Mbps multimedia service each.

조난 수신 시, 인지력 향상을 위한 자동음성경보장치 개발에 관한 연구

  • Kim, Yeong-Seup;Choe, Chang-Sam
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2013.10a
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    • pp.206-208
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    • 2013
  • The fact that the gigantic and luxurious cruise, Titanic, sank into the cold winter sea causing 1,490 casualties in 1912 resulted in discussing safety of life at sea international and Korea has adopted and operated the GMDSS to keep up with those international endeavors to decrease the number of tragic accidents at sea, However, all GMDSS equipment is making a monotonous beep sound when receiving a distress, emergency, safety and even general message so that it might contribute to lowering ship operators' cognitive abilities as well as being dull of safety precautions. So, I'd like to render great services for saving even one person by considering developing an automatic audio alarm device which allows people to respond in a prompt manner as soon as they hear an audion alarm such as a shipwreck.

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LED 등명기의 사용시간 경과에 따른 특성 변화

  • Kim, Jong-Uk;Ji, Hyeong-Min;Yu, Yong-Su;Han, Ju-Seop;Gang, Seong-Bok
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2013.10a
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    • pp.385-386
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    • 2013
  • 우리나라 해역에서 선박의 대형화, 고속화와 선박교통량의 증가 및 항만과 해양개발 등으로 해상교통 환경은 급속하게 변화하고 있으며, 항로의 좌 우 측방 한계 표시, 항행위해요소의 표시 등의 용도로 사용되는 등 명기는 항만, 연안해역 및 내륙수로에서 통항 선박의 안전을 위하여 그 수요가 점진적으로 늘어나고 있다. 항로표지에 사용하는 등명기의 정기검사는 항로표지법 제31조 및 "항로표지용장비 용품검사기준(해양수산부고시 제2013-101호, 2013.5.8)"에 따라 3년 주기로 수검하여 합격품에 한하여 사용토록 규정하고 있다. 등명기의 정기검사 유효기간에 대한 검증을 위하여 설치장소, 해상여건 등을 고려한 현장시험을 통하여 등명기의 사용 기간에 따른 열화 특성을 조사하고 적정 정기검사주기 및 교체 주기에 대한 분석의 필요성이 대두되고 있는 실정이다. 본 연구에서는 LED 등 명기의 실제 사용 환경에서 사용 경과 시간에 따른 광학적 특성, 전기적 특성 및 외관상태 등을 조사하고 분석하여 사용시간 경과에 따른 LED 등명기의 특성 변화에 대하여 기술하였다.

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Analysis of 3D integral imaging systems under fixed resource constraints (제안된 리소스에서 3D 집적 영상 시스템의 분석 기법)

  • Shin, Donghak;Hong, Seok-Min;Lee, Byung-Gook
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2012.10a
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    • pp.1012-1014
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    • 2012
  • Integral imaging is considered as a next-generation 3D display which can display 3d imaging in space using lens array. The performance of integral imaging systems depends on several factors including display panel, lens array, imaging devices and so on. In this paper, we develop a unifying framework to evaluate the resolution of integral imaging systems under fixed resource constraints. The proposed framework enables one to optimize the system performance. To show the feasibility of the proposed method, we carry out Monte Carlo simulations based on this framework and present the results.

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Trade-Off Study of Shipboard Landing of Vertical Take-off and Landing Aircraft (수직이착륙 항공기의 함상이착륙 사례분석)

  • Yoo, Chang-Sun;Cho, Am;Park, Bun-Jin;Kang, Young-Shin
    • Aerospace Engineering and Technology
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    • v.12 no.1
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    • pp.10-21
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    • 2013
  • As helicopter technology has been upgraded, today its oceanic operation is considered to be usual. In oceanic operation of helicopter, the effect of severe wind, wave, and corrosion must be investigated and the operation procedures for safety as well as the motion of shipboard arising from maneuvers of ship must also be considered. In this paper, it describes the result of trade-off study for shipboard landing and its operation procedure including dynamic interface between ship and aircraft in ship operation and gives a simulation results to implement the oceanic operation of tilt rotor aircraft.

The Development of High Resolution Film Scanner Using DSP (DSP를 이용한 고해상도 스캐너 개발)

  • 김태현;최은석;백중환
    • Proceedings of the Korea Institute of Convergence Signal Processing
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    • 2000.12a
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    • pp.149-152
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    • 2000
  • A scanner is an output device that scans documents, photographs, films etc, and convert them to digital data. Especially, a film scanner is used for scanning negative/positive films. In this paper, we design step motor control part, image sensor part, and Aか converter part which are components of the scanner and use DSP for fast signal processing. We also design the interface circuits using EPLD between these peripherals and DSP. The PC interface circuits between scanner and PC are designed by using parallel port to control and transfer the scanned data from scanner to PC. For 35mm film, we design hardwares which obtain high resolution more than 9 million pixels (horizontal resolution is 3835 and vertical resolution is 2592).

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Near-Real-Time Ship Tracking using GPS Precise Point Positioning (GPS 정밀단독측위 기법을 이용한 준실시간 선박 위치추적)

  • Ha, Ji-Hyun;Heo, Moon-Beom;Nam, Gi-Wook
    • Journal of Advanced Navigation Technology
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    • v.14 no.6
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    • pp.783-790
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    • 2010
  • For safety navigation of ships at sea, ships monitor their location obtained from Global Positioning Satellite System (GNSS). In this study, we computed near-real-time positions of a ship at sea using GPS Precise Point Positioning (PPP) technique and analyzed precision of the near-real-time positions. We conducted ship borne GPS observations in the south sea of Korea. To process the GPS data using PPP technique, GIPSY-OASIS (GPS Inferred Positioning System-Orbit Analysis and Simulation Software) developed by the Jet Propulsion Laboratory was used. Antenna phase center variations, ocean tidal loading displacements, and azimuthal gradients of the atmosphere were corrected or estimated as standard procedures of high-precision GIPSY-OASIS data processing. As a result, the precisions of near-real-time positions was ~1cm.