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《오탄집》의 책판문양 사격자만자매화문[斜格子卍字梅花紋] 《오탄집》의 책판문양으로 매화꽃무늬를 만(卍)자 모양의 사격자 바탕과 함께 배치한 사격자만자매화문입니다. 예로부터 매화는 이른 봄 홀로 피어 봄소식을 전하는 꽃으로, 맑은 향기와 우아한 운치가 있어 선비들에게 많은 사랑을 받았습니다. 매화문양을 중심으로 불도를 상징하는 표식이자 길상만덕(吉祥萬德)을 의미하는 만자를 사격자 배경으로 구성하여 문양에 다채로움을 더했습니다.

안개

작성자 :
horryc
작성일 :
2021-03-14
  • 도서

    100m이상 시정확보를 위한 교량용 안개제거장치 개발 최종보고서 : 국토교통기술사업화 지원 최종보고서
    • 저자 :
      누리플랜 평화엔지니어링
    • 발행처 :
      국토교통부
    • 발행연도 :
      2019
    • 국립중앙도서관
      상세정보

      상세정보

      표제
      100m이상 시정확보를 위한 교량용 안개제거장치 개발 최종보고서 : 국토교통기술사업화 지원 최종보고서
      저자사항
      누리플랜 평화엔지니어링
      발행처
      국토교통부
      발행연도
      2019
      자료유형보고서
      보고서
      매체유형
      전자책
      분류기호
      536
      주제
      교량공학[橋梁工學]
      닫기
      상세페이지 원문 : 모두이용
  • 학위논문

    선박안전운항을 위한 안개 농도에 따른 동력제어 시스템 설계 및 제작
    • 저자 :
      홍용표
    • 발행처 :
      목포해양대학교
    • 발행연도 :
      2019
  • 일반논문·보고서

    100m 이상 시정확보를 위한 교량용 안개제거장치 개발 ()
    • 저자 :
      누리플랜,
    • 발행처 :
      누리플랜
    • 발행연도 :
      2019
    • 언어 :
      kor
    □ Purpose & Contents
    The final goals for this research are comprised of the followings :
    1) Development of optimized counter-fog device which allows to assure over 100m visibility distance constantly on the road of the bridge,
    2) Development of low-noise counter-fog device to minimize the noise occurred by the blower system,
    3) Development of light-weight counter-fog device suitable for the bridge installation,
    4) Set up of standard design specifications and maintenance manual for the installation on the new and existing bridges,
    5) Set up and operation of Test-bed.

    □ Purpose & Contents
    〈 For the first year 〉
    1) Related reference and report
    2) Drawing and prototype of counter-fog device for improvement of performance
    • Drawing and prototype of device emitting the air with less than 40% of initial relative humidity
    • Drawing and prototype of device emitting over one million anions per second
    • Drawing and prototype of optimized mesh able to eliminate the fog particles entering into the air inlet of the blower system
    3) Prototype of counter-fog device and report on field application test
    • Prototype and report on field application test
    • Qualification report on performance evaluation
    4) Report on the light-weight material of counter-fog device
    • Computer simulation result report on the stability analysis for the installation on the new and existing bridges
    • Environmental and structural stability report on the light-weight material
    • Drawing and prototype of housing using the light-weight material

    〈 For the second year 〉
    1) Related reference and report
    2) Drawing and prototype of counter-fog device to reduce the noise
    • Drawing and prototype of silence to reduce the noise of fan from the inlet and outlet of the blower system
    • Drawing and prototype of noise insulation material inside the counter-fog device
    • Drawing and prototype of soundproof structure on the side of counter-fog device
    • A prototype and report on field application test
    3) Standard design specifications for the installation on the new and existing bridges
    • Standard design specifications and drawing
    • Maintenance manual for installation and operation
    4) Test-bed on counter-fog device for a bridge
    5) Operation and modification report on test-bed
    6) Qualification report on performance evaluation

    □ Results
    〈 For the first year 〉
    1) Related reference and report
    2) Drawing and prototype of counter-fog device for improvement of performance
    • Drawing and prototype of device emitting the air with less than 40% of initial relative humidity
    • Drawing and prototype of device emitting over one million anions per second
    • Drawing and prototype of optimized mesh able to eliminate the fog particles entering into the air inlet of the blower system
    3) Prototype of counter-fog device and report on field application test
    • Prototype and report on field application test
    • Qualification report on performance evaluation
    4) Report on the light-weight material of counter-fog device
    • Computer simulation result report on the stability analysis for the installation on the new and existing bridges
    • Environmental and structural stability report on the light-weight material
    • Drawing and prototype of housing using the light-weight material

    〈 For the second year 〉
    1) Related reference and report
    2) Drawing and prototype of counter-fog device to reduce the noise
    • Drawing and prototype of silence to reduce the noise of fan from the inlet and outlet of the blower system
    • Drawing and prototype of noise insulation material inside the counter-fog device
    • Drawing and prototype of soundproof structure on the side of counter-fog device
    • A prototype and report on field application test
    3) Standard design specifications for the installation on the new and existing bridges
    • Standard design specifications and drawing
    • Maintenance manual for installation and operation
    4) Test-bed on counter-fog device for a bridge
    5) Operation and modification report on test-bed
    6) Qualification report on performance evaluation

    □ Expected Contribution
    〈 Application plan 〉
    1) Counter-fog device, the result of this research, could be the base of precious research materials on artificial weather control system to deal with the abnormal climate in future.
    2) Since it is an mechanical but active system to make sure of the safety against any danger caused by fog, it could create a new business field and could provide the bigger market to the major part suppliers related to this device.
    3) Lastly, it could be utilized as R&D business information to add values on research development such as joint utilization and commercialization assistance, etc. through the verification service including specification, patent, prototype, etc. with the government organization for the public advantage as a national level.

    〈 Expected contribution 〉
    1) Currently, no counter-fog technology is available in any other countries. As such, this technology could strengthen the national competitiveness and a great ripple effect is anticipated to the related companies in Korea. Particularly, the industry in large air blower, which is one of the major parts of this device, and noise control technology industry could expect to achieve an important technical development.
    2) Based on this technology, securing the original technology which will boost the research development in the field of meteorological disaster and related, could improve the national competitiveness in the related industry. Especially fog related field among meteorological disaster studies used to have a high technological dependency. So it is a very important technology to be independent in this field. Moreover, by obtaining the unique technology against the high technology of advanced countries on counter-fog facility or by removing the obstacles while introducing technology, the basic ground of technology advanced country could be ready in front of us.
    3) As a Korea based counter-fog facility, we can expect more effective result without wasting budget. And also, it is expected to play a major role of protecting life and property of people through preventing any fatal traffic accident caused by fog in Seohae Grand Bridge or Yeongjong Grand Bridge, etc. It is also expected to save the social opportunity cost through reducing any inconvenience due to fog in the airport or seaport.
    4) Counter-fog facility appropriate to the local weather condition can show the new guideline and may provide the opportunities to have the import substitution effect as well as to preoccupy the export market. As a conclusion, it is expected to contribute the advance in the local road environment and weather industries. On top of that, it could eventually increase the user’s satisfaction level by providing the safe and pleasant road conditions.

    (출처 : SUMMARY 7p)

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    • 한국과학기술정보연구원
      초록 목차 상세페이지 원문 : 도서관방문이용

      □ Purpose & Contents
      The final goals for this research are comprised of the followings :
      1) Development of optimized counter-fog device which allows to assure over 100m visibility distance constantly on the road of the bridge,
      2) Development of low-noise counter-fog device to minimize the noise occurred by the blower system,
      3) Development of light-weight counter-fog device suitable for the bridge installation,
      4) Set up of standard design specifications and maintenance manual for the installation on the new and existing bridges,
      5) Set up and operation of Test-bed.

      □ Purpose & Contents
      〈 For the first year 〉
      1) Related reference and report
      2) Drawing and prototype of counter-fog device for improvement of performance
      • Drawing and prototype of device emitting the air with less than 40% of initial relative humidity
      • Drawing and prototype of device emitting over one million anions per second
      • Drawing and prototype of optimized mesh able to eliminate the fog particles entering into the air inlet of the blower system
      3) Prototype of counter-fog device and report on field application test
      • Prototype and report on field application test
      • Qualification report on performance evaluation
      4) Report on the light-weight material of counter-fog device
      • Computer simulation result report on the stability analysis for the installation on the new and existing bridges
      • Environmental and structural stability report on the light-weight material
      • Drawing and prototype of housing using the light-weight material

      〈 For the second year 〉
      1) Related reference and report
      2) Drawing and prototype of counter-fog device to reduce the noise
      • Drawing and prototype of silence to reduce the noise of fan from the inlet and outlet of the blower system
      • Drawing and prototype of noise insulation material inside the counter-fog device
      • Drawing and prototype of soundproof structure on the side of counter-fog device
      • A prototype and report on field application test
      3) Standard design specifications for the installation on the new and existing bridges
      • Standard design specifications and drawing
      • Maintenance manual for installation and operation
      4) Test-bed on counter-fog device for a bridge
      5) Operation and modification report on test-bed
      6) Qualification report on performance evaluation

      □ Results
      〈 For the first year 〉
      1) Related reference and report
      2) Drawing and prototype of counter-fog device for improvement of performance
      • Drawing and prototype of device emitting the air with less than 40% of initial relative humidity
      • Drawing and prototype of device emitting over one million anions per second
      • Drawing and prototype of optimized mesh able to eliminate the fog particles entering into the air inlet of the blower system
      3) Prototype of counter-fog device and report on field application test
      • Prototype and report on field application test
      • Qualification report on performance evaluation
      4) Report on the light-weight material of counter-fog device
      • Computer simulation result report on the stability analysis for the installation on the new and existing bridges
      • Environmental and structural stability report on the light-weight material
      • Drawing and prototype of housing using the light-weight material

      〈 For the second year 〉
      1) Related reference and report
      2) Drawing and prototype of counter-fog device to reduce the noise
      • Drawing and prototype of silence to reduce the noise of fan from the inlet and outlet of the blower system
      • Drawing and prototype of noise insulation material inside the counter-fog device
      • Drawing and prototype of soundproof structure on the side of counter-fog device
      • A prototype and report on field application test
      3) Standard design specifications for the installation on the new and existing bridges
      • Standard design specifications and drawing
      • Maintenance manual for installation and operation
      4) Test-bed on counter-fog device for a bridge
      5) Operation and modification report on test-bed
      6) Qualification report on performance evaluation

      □ Expected Contribution
      〈 Application plan 〉
      1) Counter-fog device, the result of this research, could be the base of precious research materials on artificial weather control system to deal with the abnormal climate in future.
      2) Since it is an mechanical but active system to make sure of the safety against any danger caused by fog, it could create a new business field and could provide the bigger market to the major part suppliers related to this device.
      3) Lastly, it could be utilized as R&D business information to add values on research development such as joint utilization and commercialization assistance, etc. through the verification service including specification, patent, prototype, etc. with the government organization for the public advantage as a national level.

      〈 Expected contribution 〉
      1) Currently, no counter-fog technology is available in any other countries. As such, this technology could strengthen the national competitiveness and a great ripple effect is anticipated to the related companies in Korea. Particularly, the industry in large air blower, which is one of the major parts of this device, and noise control technology industry could expect to achieve an important technical development.
      2) Based on this technology, securing the original technology which will boost the research development in the field of meteorological disaster and related, could improve the national competitiveness in the related industry. Especially fog related field among meteorological disaster studies used to have a high technological dependency. So it is a very important technology to be independent in this field. Moreover, by obtaining the unique technology against the high technology of advanced countries on counter-fog facility or by removing the obstacles while introducing technology, the basic ground of technology advanced country could be ready in front of us.
      3) As a Korea based counter-fog facility, we can expect more effective result without wasting budget. And also, it is expected to play a major role of protecting life and property of people through preventing any fatal traffic accident caused by fog in Seohae Grand Bridge or Yeongjong Grand Bridge, etc. It is also expected to save the social opportunity cost through reducing any inconvenience due to fog in the airport or seaport.
      4) Counter-fog facility appropriate to the local weather condition can show the new guideline and may provide the opportunities to have the import substitution effect as well as to preoccupy the export market. As a conclusion, it is expected to contribute the advance in the local road environment and weather industries. On top of that, it could eventually increase the user’s satisfaction level by providing the safe and pleasant road conditions.

      (출처 : SUMMARY 7p)

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      닫기

      표지 ... 1
      제 출 문 ... 2
      보고서 요약서 ... 3
      국문 요약문 ... 4
      SUMMARY ... 7
      CONTENTS ... 10
      목차 ... 11
      제1장. 연구개발과제의 개요 ... 12
      1. 연구개발 목적 ... 12
      2. 연구개발의 필요성 ... 12
      3. 연구개발 범위 ... 17
      제2장. 국내외 기술 개발 현황 ... 21
      1. 국내 관련기술 특허 동향 ... 21
      2. 국외 관련기술 특허 동향 ... 26
      3. 국내외 시장분석 및 사업화 전망 ... 27
      제3장. 연구 수행 내용 및 성과 ... 33
      1. 연구개발의 최종 목표 ... 33
      2. 최종목표Ⅰ: 교량 내 상시 시정거리 100m 이상 확보 가능한 안개제거장치의 최적화 개발 ... 34
      3. 최종목표Ⅱ: 교량설치를 위한 1톤 이하의 안개제거장치 개발 ... 45
      4. 최종목표Ⅲ: 송풍장치에서 발생하는 소음을 줄임으로써 85dB 이하의 저소음 안개제거 장치 개발 및 테스트베드 구축 ... 49
      5. 최종목표Ⅳ: 기존 교량이나 신설 교량에서 설치 시 필요한 표준설계시방서와 유지관리 매뉴얼 작성 ... 86
      제4장. 목표 달성도 및 관련 분야 기여도 ... 99
      1. 1차년도 목표 달성도 ... 99
      2. 2차년도 목표 달성도 ... 101
      3. 관련 분야 기여도 ... 105
      제5장. 연구개발성과의 활용계획 ... 106
      1. 성과물의 활용방안 ... 106
      제6장. 연구 과정에서 수집한 해외 과학기술 정보 ... 107
      1. 해외 안개관련 교통안전시설 현황 ... 107
      제7장. 연구개발성과의 보안등급 ... 109
      제8장. 국가과학기술종합정보시스템에 등록한 연구시설·장비 현황 ... 109
      제9장. 연구개발과제 수행에 따른 연구실 등의 안전 조치 이행 실적 ... 109
      1. 일상점검 ... 109
      2. 정기 안전 교육 ... 109
      제10장. 연구개발과제의 대표적 연구 실적 ... 110
      제11장. 기타 사항 ... 112
      제12장. 참고 문헌 ... 113
      참고3 SMK(Sales Material Kit) (서식) ... 114
      끝페이지 ... 116
      표지 ... 1
      제 출 문 ... 2
      보고서 요약서 ... 3
      국문 요약문 ... 4
      SUMMARY ... 7
      CONTENTS ... 10
      목차 ... 11
      제1장. 연구개발과제의 개요 ... 12
      1. 연구개발 목적 ... 12
      2. 연구개발의 필요성 ... 12
      3. 연구개발 범위 ... 17
      제2장. 국내외 기술 개발 현황 ... 21
      1. 국내 관련기술 특허 동향 ... 21
      2. 국외 관련기술 특허 동향 ... 26
      3. 국내외 시장분석 및 사업화 전망 ... 27
      제3장. 연구 수행 내용 및 성과 ... 33
      1. 연구개발의 최종 목표 ... 33
      2. 최종목표Ⅰ: 교량 내 상시 시정거리 100m 이상 확보 가능한 안개제거장치의 최적화 개발 ... 34
      3. 최종목표Ⅱ: 교량설치를 위한 1톤 이하의 안개제거장치 개발 ... 45
      4. 최종목표Ⅲ: 송풍장치에서 발생하는 소음을 줄임으로써 85dB 이하의 저소음 안개제거 장치 개발 및 테스트베드 구축 ... 49
      5. 최종목표Ⅳ: 기존 교량이나 신설 교량에서 설치 시 필요한 표준설계시방서와 유지관리 매뉴얼 작성 ... 86
      제4장. 목표 달성도 및 관련 분야 기여도 ... 99
      1. 1차년도 목표 달성도 ... 99
      2. 2차년도 목표 달성도 ... 101
      3. 관련 분야 기여도 ... 105
      제5장. 연구개발성과의 활용계획 ... 106
      1. 성과물의 활용방안 ... 106
      제6장. 연구 과정에서 수집한 해외 과학기술 정보 ... 107
      1. 해외 안개관련 교통안전시설 현황 ... 107
      제7장. 연구개발성과의 보안등급 ... 109
      제8장. 국가과학기술종합정보시스템에 등록한 연구시설·장비 현황 ... 109
      제9장. 연구개발과제 수행에 따른 연구실 등의 안전 조치 이행 실적 ... 109
      1. 일상점검 ... 109
      2. 정기 안전 교육 ... 109
      제10장. 연구개발과제의 대표적 연구 실적 ... 110
      제11장. 기타 사항 ... 112
      제12장. 참고 문헌 ... 113
      참고3 SMK(Sales Material Kit) (서식) ... 114
      끝페이지 ... 116

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  • 학위논문

    안개영상의 의미론적 분할 및 안개제거를 위한 심층 멀티태스크 네트워크 () / 멀티미디어학회논문지 = Journal of Korea Multimedia Society, 22(9), 1000-1010
    • 저자 :
      송태용 / School of Electrical Electronic Engineering, Yonsei University
    • 발행처 :
      한국멀티미디어학회
    • 발행연도 :
      2019
    • 언어 :
      kor
    Image semantic segmentation and dehazing are key tasks in the computer vision. In recent years, researches in both tasks have achieved substantial improvements in performance with the development of Convolutional Neural Network (CNN). However, most of the previous works for semantic segmentation assume the images are captured in clear weather and show degraded performance under hazy images with low contrast and faded color. Meanwhile, dehazing aims to recover clear image given observed hazy image, which is an ill-posed problem and can be alleviated with additional information about the image. In this work, we propose a deep multi-task network for simultaneous semantic segmentation and dehazing. The proposed network takes single haze image as input and predicts dense semantic segmentation map and clear image. The visual information getting refined during the dehazing process can help the recognition task of semantic segmentation. On the other hand, semantic features obtained during the semantic segmentation process can provide cues for color priors for objects, which can help dehazing process. Experimental results demonstrate the effectiveness of the proposed multi-task approach, showing improved performance compared to the separate networks.

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    • 한국과학기술정보연구원
      초록 상세페이지 원문 : 도서관방문이용

      Image semantic segmentation and dehazing are key tasks in the computer vision. In recent years, researches in both tasks have achieved substantial improvements in performance with the development of Convolutional Neural Network (CNN). However, most of the previous works for semantic segmentation assume the images are captured in clear weather and show degraded performance under hazy images with low contrast and faded color. Meanwhile, dehazing aims to recover clear image given observed hazy image, which is an ill-posed problem and can be alleviated with additional information about the image. In this work, we propose a deep multi-task network for simultaneous semantic segmentation and dehazing. The proposed network takes single haze image as input and predicts dense semantic segmentation map and clear image. The visual information getting refined during the dehazing process can help the recognition task of semantic segmentation. On the other hand, semantic features obtained during the semantic segmentation process can provide cues for color priors for objects, which can help dehazing process. Experimental results demonstrate the effectiveness of the proposed multi-task approach, showing improved performance compared to the separate networks.

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  • 학위논문

    단일 영상에서 안개 제거 방법을 이용한 객체 검출 알고리즘 개선 () / 반도체디스플레이기술학회지 = Journal of the semiconductor & display technology, 17(2), 76-80
    • 저자 :
      안효창 / 극동대학교 에너지IT학과
    • 발행처 :
      한국반도체디스플레이기술학회
    • 발행연도 :
      2018
    • 언어 :
      kor
    In recent years, with the development of automobile technology, smart system technology that assists safe driving has been developed. A camera is installed on the front and rear of the vehicle as well as on the left and right sides to detect and warn of collision risks and hazards. Beyond the technology of simple black-box recording via cameras, we are developing intelligent systems that combine various computer vision technologies. However, most related studies have been developed to optimize performance in laboratory-like environments that do not take environmental factors such as weather into account. In this paper, we propose a method to detect object by restoring visibility in image with degraded image due to weather factors such as fog. First, the image quality degradation such as fog is detected in a single image, and the image quality is improved by restoring using an intermediate value filter. Then, we used an adaptive feature extraction method that removes unnecessary elements such as noise from the improved image and uses it to recognize objects with only the necessary features. In the proposed method, it is shown that more feature points are extracted than the feature points of the region of interest in the improved image.

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    • 한국과학기술정보연구원
      초록 상세페이지 원문 : 도서관방문이용

      In recent years, with the development of automobile technology, smart system technology that assists safe driving has been developed. A camera is installed on the front and rear of the vehicle as well as on the left and right sides to detect and warn of collision risks and hazards. Beyond the technology of simple black-box recording via cameras, we are developing intelligent systems that combine various computer vision technologies. However, most related studies have been developed to optimize performance in laboratory-like environments that do not take environmental factors such as weather into account. In this paper, we propose a method to detect object by restoring visibility in image with degraded image due to weather factors such as fog. First, the image quality degradation such as fog is detected in a single image, and the image quality is improved by restoring using an intermediate value filter. Then, we used an adaptive feature extraction method that removes unnecessary elements such as noise from the improved image and uses it to recognize objects with only the necessary features. In the proposed method, it is shown that more feature points are extracted than the feature points of the region of interest in the improved image.

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  • 학위논문

    HLS 색상 공간에서 동영상의 안개제거 기법 () / 멀티미디어학회논문지 = Journal of Korea Multimedia Society, 20(1), 32-42
    • 저자 :
      안재원 / Dept. of Mechatronics, Chungnam National University
    • 발행처 :
      한국멀티미디어학회
    • 발행연도 :
      2017
    • 언어 :
      kor
    This paper proposes a new haze removal method for moving image sequence. Since the conventional dark channel prior haze removal method adjusts each color component separately in RGB color space, there can be severe color distortion in the haze removed output image. In order to resolve this problem, this paper proposes a new haze removal scheme that adjusts luminance and saturation components in HLS color space while retaining hue component. Also the conventional dark channel prior haze removal method is developed to obtain best haze removal performance for a single image. Therefore, if it is applied to a moving image sequence, the estimated parameter values change rapidly and the haze removed output image sequence shows unnatural glitter defects. To overcome this problem, a new parameter estimation method using Kalman filter is proposed for moving image sequence. Experimental results demonstrate that the haze removal performance of the proposed method is better than that of the conventional dark channel prior method.

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    • 한국과학기술정보연구원
      초록 상세페이지 원문 : 도서관방문이용

      This paper proposes a new haze removal method for moving image sequence. Since the conventional dark channel prior haze removal method adjusts each color component separately in RGB color space, there can be severe color distortion in the haze removed output image. In order to resolve this problem, this paper proposes a new haze removal scheme that adjusts luminance and saturation components in HLS color space while retaining hue component. Also the conventional dark channel prior haze removal method is developed to obtain best haze removal performance for a single image. Therefore, if it is applied to a moving image sequence, the estimated parameter values change rapidly and the haze removed output image sequence shows unnatural glitter defects. To overcome this problem, a new parameter estimation method using Kalman filter is proposed for moving image sequence. Experimental results demonstrate that the haze removal performance of the proposed method is better than that of the conventional dark channel prior method.

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  • 학위논문

    신경회로망 기반의 주야간 안개 감지 알고리즘 () / 한국통신학회논문지 = The Journal of Korean Institute of Communications and Information Sciences, 42(3), 673-676
    • 저자 :
      강충헌 / Department of Electronic Engineering, Sogang University
    • 발행처 :
      한국통신학회
    • 발행연도 :
      2017
    • 언어 :
      kor
    In this paper, we propose a day and night fog detection algorithm that is not affected by lighting conditions. First, we present the definitions and the extraction methods of fog features in daytime and nighttime environments, respectively. We then propose the fog detection algorithm using a neural network from the fog features. A set of experiments has been conducted with images taken at various environments, and the average recall of the proposed algorithm is 97.5%.

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    • 한국과학기술정보연구원
      초록 상세페이지 원문 : 도서관방문이용

      In this paper, we propose a day and night fog detection algorithm that is not affected by lighting conditions. First, we present the definitions and the extraction methods of fog features in daytime and nighttime environments, respectively. We then propose the fog detection algorithm using a neural network from the fog features. A set of experiments has been conducted with images taken at various environments, and the average recall of the proposed algorithm is 97.5%.

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  • 일반논문·보고서

    안개 감지 및 시정거리 추정을 위한 전지구 위성항법 시스템 (GNSS) 활용기법의 연구 (Investigation on the use of GNSS for detecting fog and estimating visibility distance)
    • 저자 :
      한국기상학회, 이승우
    • 발행처 :
      한국기상학회
    • 발행연도 :
      2015
    • 언어 :
      kor
    IV. The result of research and development
    First we conducted research on detecting fog using GNSS signal phase delay. The signal phase delay can be obtained either by integrating the refractivity of the fog along the signal path or by estimating it based on the GNSS measurements, which we chose the latter approach. We conducted numerical simulation to get some sense on the level of phase delay caused by fog, where the refractivity of cloud is used instead of that of fog. To estimate the signal phase delay caused by the fog we used an optimal estimation technique such as the Extended Kalman Filter (EKF).
    We found that the phase residuals obtained from low elevation satellites under foggy conditions show extra increment of 2 cm or more than those obtained under unfogged conditions. This level of phase delay generally agrees with that computed in the numerical simulation. However, the phase residual sometimes show unexpected peaks in unfoggy conditions, which seems to be a consequence of signal multipath. We also explore the option of detecting fog using GNSS signal attenuation. Based on the GNSS-R (GNSS Reflectometry) methodology, the amount of signal attenuation caused by liquid water can be observed in the SNR (Signal-to-Noise Ratio) or CNR (Carrier-to-Noise Ratio) measurements. In order to compute the CN0 measurement that can be interpreted with simple SNR phase diagram, the software GNSS receiver is developed and also the RF frontend such as antenna. In this research the RHCP (Right-Handed Circular Polarization) and LHCP (Left-Handed Circular Polarization) antennas are used to receive both direct and indirect signals independently using the USRP. A test bed is set up so that the level of signal attenuation caused by fog is measured by the software receiver. Results show that fog can be a source to lower CN0 considerably compared to the other factors. But also some other effects such as multipath can also cause the CN0 to be reduced so the care should be taken to isolate the effect of fog. Finally due to importance of multipath upon the signal phase dealy and signal attenuation methods multipath induced frequency and relative phase angle is analyzed in detail to accommodate the effect of multipath in CN0 measurements, which is closely related to detecting snow and soil moisture. Finally a method to detect snow depth using GNSS multipath is developed and validated based on numerical simulation study.

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    • 한국과학기술정보연구원
      초록 목차 상세페이지 원문 : 도서관방문이용

      IV. The result of research and development
      First we conducted research on detecting fog using GNSS signal phase delay. The signal phase delay can be obtained either by integrating the refractivity of the fog along the signal path or by estimating it based on the GNSS measurements, which we chose the latter approach. We conducted numerical simulation to get some sense on the level of phase delay caused by fog, where the refractivity of cloud is used instead of that of fog. To estimate the signal phase delay caused by the fog we used an optimal estimation technique such as the Extended Kalman Filter (EKF).
      We found that the phase residuals obtained from low elevation satellites under foggy conditions show extra increment of 2 cm or more than those obtained under unfogged conditions. This level of phase delay generally agrees with that computed in the numerical simulation. However, the phase residual sometimes show unexpected peaks in unfoggy conditions, which seems to be a consequence of signal multipath. We also explore the option of detecting fog using GNSS signal attenuation. Based on the GNSS-R (GNSS Reflectometry) methodology, the amount of signal attenuation caused by liquid water can be observed in the SNR (Signal-to-Noise Ratio) or CNR (Carrier-to-Noise Ratio) measurements. In order to compute the CN0 measurement that can be interpreted with simple SNR phase diagram, the software GNSS receiver is developed and also the RF frontend such as antenna. In this research the RHCP (Right-Handed Circular Polarization) and LHCP (Left-Handed Circular Polarization) antennas are used to receive both direct and indirect signals independently using the USRP. A test bed is set up so that the level of signal attenuation caused by fog is measured by the software receiver. Results show that fog can be a source to lower CN0 considerably compared to the other factors. But also some other effects such as multipath can also cause the CN0 to be reduced so the care should be taken to isolate the effect of fog. Finally due to importance of multipath upon the signal phase dealy and signal attenuation methods multipath induced frequency and relative phase angle is analyzed in detail to accommodate the effect of multipath in CN0 measurements, which is closely related to detecting snow and soil moisture. Finally a method to detect snow depth using GNSS multipath is developed and validated based on numerical simulation study.

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      표지 ... 1
      제출문 ... 2
      보고서 요약서 ... 3
      요약문 ... 4
      SUMMARY ... 7
      CONTENTS ... 9
      목차 ... 10
      List of Table ... 12
      List of Figure ... 13
      제1장 연구개발과제의 개요 ... 15
      1절 연구의 필요성 및 목적 ... 15
      제2절 연구개발의 범위 ... 17
      • GNSS 신호 위상 지연을 이용한 안개 감지 방법론의 분석 ... 17
      • 한반도 안개 발생 현황 분석 ... 17
      • 실제 안개 발생 사례를 이용한 신호 위상지연 기반 기법 검증 ... 17
      • GNSS 신호 감쇠를 이용한 안개 감지 방법론의 분석 ... 17
      • 신호 감쇠 기반 기법을 위한 RF frontend 및 소프트웨어 수신기 개발 ... 17
      • 신호 감쇠기반 기법의 테스트 및 결과 분석 ... 17
      • GNSS multipath 분석 및 안개 감지 기법의 영향 분석 ... 17
      • GNSS 적설 두께 감지 분야로의 적용 ... 18
      제2장 국내외 기술개발 현황 ... 19
      제3장 연구개발 수행 내용 및 결과 ... 21
      1절 기존 관측기법 분석 및 최적 기법 선정 ... 21
      1. 안개 감지를 위한 기존 GNSS 관측기법의 조사 ... 21
      2. GPS 신호의 위상지연 발생 ... 23
      3. GPS 신호 위상지연 추정 기법 ... 26
      4. 수분에 의한 GNSS 신호의 감쇠 ... 31
      5. 한반도 안개 특성 분석 및 활용 결과 ... 33
      제2절 GNSS 신호 위상지연 기반 기법의 분석 및 테스트 ... 42
      1. GPS 신호 위상지연기법의 추가 분석 ... 42
      2. 실제 안개 사례의 신호 위성지연 기반 추가 분석 ... 44
      3. GNSS 소프트웨어 수신기 설계 및 구현 ... 55
      제3절 GNSS 신호 감쇠 기반 기법의 분석 및 검증 ... 61
      1. 소프트웨어 수신기를 이용한 신호 감쇠 측정 ... 61
      2. 신호 감쇠 기반 기법의 실험 및 성능 평가 ... 63
      3. GNSS multipath의 정량적 분석 ... 70
      4. GNSS 적설 두께 감지 분야로의 적용 ... 79
      제4장 목표 달성도 및 관련분야에의 기여도 ... 89
      1절 2012년(1차년도) 연구목표의 달성도 ... 89
      • 안개 감지에 적용 가능한 여러 GNSS 관측 기법에 대한 조사 수행 (완료) ... 89
      • 안개에 의한 GNSS 신호의 위상지연 원리에 대한 이론적 분석 수행 (완료) ... 89
      • 한반도 내의 안개 특성 분석 수행 및 신호 위상지연 기법 적용 사례연구 (완료) ... 89
      2절 2013년(2차년도) 연구목표의 달성도 ... 89
      • 신호 위상 지연 이용 안개감지 원리 추가 분석 수행 (완료) ... 90
      • 신호 위상 지연 이용 실제 안개 사례 추가 분석 및 한계점 파악 (완료) ... 90
      • 신호 감쇠 기반 기법 조사 및 소프트웨어 수신기 (SDR) 의 설계 및 모듈 개발 (완료) ... 90
      3절 2014년(3차년도) 연구목표의 달성도 ... 90
      • SDR 개발 완료 및 SDR 이용 신호 감쇠 기반 안개 감지 실험 수행 (완료) ... 90
      • 실험을 통한 신호 감쇠기반 기법의 성능 분석 (완료) ... 90
      • Multipath 분석 및 GNSS-R 기반 적설 기법의 개발 (완료) ... 91
      제5장 연구개발결과의 활용계획 (붙임1 참조) ... 92
      1. 연구목표 및 내용 ... 92
      2. 연구수행결과 현황(연구종료시점까지) ... 92
      가. 특허(실용신안) 등 자료목록 ... 92
      나. 프로그램 등록목록 ... 92
      다. 노하우 내역 ... 92
      라. 논문게재 및 발표 실적 ... 92
      3. 연구성과 ... 93
      4. 기술이전 및 연구결과 활용계획 ... 93
      가. 당해연도 활용계획 ... 93
      나. 활용방법 ... 93
      다. 차년도이후 활용계획 ... 94
      4. 기대효과 ... 94
      제6장 참고문헌 ... 95
      끝페이지 ... 98
      표지 ... 1
      제출문 ... 2
      보고서 요약서 ... 3
      요약문 ... 4
      SUMMARY ... 7
      CONTENTS ... 9
      목차 ... 10
      List of Table ... 12
      List of Figure ... 13
      제1장 연구개발과제의 개요 ... 15
      1절 연구의 필요성 및 목적 ... 15
      제2절 연구개발의 범위 ... 17
      • GNSS 신호 위상 지연을 이용한 안개 감지 방법론의 분석 ... 17
      • 한반도 안개 발생 현황 분석 ... 17
      • 실제 안개 발생 사례를 이용한 신호 위상지연 기반 기법 검증 ... 17
      • GNSS 신호 감쇠를 이용한 안개 감지 방법론의 분석 ... 17
      • 신호 감쇠 기반 기법을 위한 RF frontend 및 소프트웨어 수신기 개발 ... 17
      • 신호 감쇠기반 기법의 테스트 및 결과 분석 ... 17
      • GNSS multipath 분석 및 안개 감지 기법의 영향 분석 ... 17
      • GNSS 적설 두께 감지 분야로의 적용 ... 18
      제2장 국내외 기술개발 현황 ... 19
      제3장 연구개발 수행 내용 및 결과 ... 21
      1절 기존 관측기법 분석 및 최적 기법 선정 ... 21
      1. 안개 감지를 위한 기존 GNSS 관측기법의 조사 ... 21
      2. GPS 신호의 위상지연 발생 ... 23
      3. GPS 신호 위상지연 추정 기법 ... 26
      4. 수분에 의한 GNSS 신호의 감쇠 ... 31
      5. 한반도 안개 특성 분석 및 활용 결과 ... 33
      제2절 GNSS 신호 위상지연 기반 기법의 분석 및 테스트 ... 42
      1. GPS 신호 위상지연기법의 추가 분석 ... 42
      2. 실제 안개 사례의 신호 위성지연 기반 추가 분석 ... 44
      3. GNSS 소프트웨어 수신기 설계 및 구현 ... 55
      제3절 GNSS 신호 감쇠 기반 기법의 분석 및 검증 ... 61
      1. 소프트웨어 수신기를 이용한 신호 감쇠 측정 ... 61
      2. 신호 감쇠 기반 기법의 실험 및 성능 평가 ... 63
      3. GNSS multipath의 정량적 분석 ... 70
      4. GNSS 적설 두께 감지 분야로의 적용 ... 79
      제4장 목표 달성도 및 관련분야에의 기여도 ... 89
      1절 2012년(1차년도) 연구목표의 달성도 ... 89
      • 안개 감지에 적용 가능한 여러 GNSS 관측 기법에 대한 조사 수행 (완료) ... 89
      • 안개에 의한 GNSS 신호의 위상지연 원리에 대한 이론적 분석 수행 (완료) ... 89
      • 한반도 내의 안개 특성 분석 수행 및 신호 위상지연 기법 적용 사례연구 (완료) ... 89
      2절 2013년(2차년도) 연구목표의 달성도 ... 89
      • 신호 위상 지연 이용 안개감지 원리 추가 분석 수행 (완료) ... 90
      • 신호 위상 지연 이용 실제 안개 사례 추가 분석 및 한계점 파악 (완료) ... 90
      • 신호 감쇠 기반 기법 조사 및 소프트웨어 수신기 (SDR) 의 설계 및 모듈 개발 (완료) ... 90
      3절 2014년(3차년도) 연구목표의 달성도 ... 90
      • SDR 개발 완료 및 SDR 이용 신호 감쇠 기반 안개 감지 실험 수행 (완료) ... 90
      • 실험을 통한 신호 감쇠기반 기법의 성능 분석 (완료) ... 90
      • Multipath 분석 및 GNSS-R 기반 적설 기법의 개발 (완료) ... 91
      제5장 연구개발결과의 활용계획 (붙임1 참조) ... 92
      1. 연구목표 및 내용 ... 92
      2. 연구수행결과 현황(연구종료시점까지) ... 92
      가. 특허(실용신안) 등 자료목록 ... 92
      나. 프로그램 등록목록 ... 92
      다. 노하우 내역 ... 92
      라. 논문게재 및 발표 실적 ... 92
      3. 연구성과 ... 93
      4. 기술이전 및 연구결과 활용계획 ... 93
      가. 당해연도 활용계획 ... 93
      나. 활용방법 ... 93
      다. 차년도이후 활용계획 ... 94
      4. 기대효과 ... 94
      제6장 참고문헌 ... 95
      끝페이지 ... 98

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