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Image Quality Assessment of Mobile-based Image Acquisition System for Disaster Scientific Investigation

재난원인과학조사를 위한 차량기반 영상취득시스템의 영상품질평가

  • Kim, Mi Kyeong (Department of Civil and Environmental Engineering, Yonsei University) ;
  • Kim, Sang Pil (Department of Civil and Environmental Engineering, Yonsei University) ;
  • Kim, Nam Hoon (Department of Civil and Environmental Engineering, Yonsei University) ;
  • Song, Young Karb (Disaster Scientific Investigation Division, National Disaster Management Institute) ;
  • Sohn, Hong Gyoo (Department of Civil and Environmental Engineering, Yonsei University)
  • 김미경 (연세대학교 토목환경공학과) ;
  • 김상필 (연세대학교 토목환경공학과) ;
  • 김남훈 (연세대학교 토목환경공학과) ;
  • 송영갑 (국립재난안전연구원 재난원인조사실) ;
  • 손홍규 (연세대학교 토목환경공학과)
  • Received : 2016.07.25
  • Accepted : 2016.08.30
  • Published : 2016.09.30

Abstract

There are various types of disasters now, and accordingly it is practically difficult to manage all types of disasters effectively. If we are able to reconstruct the disaster event and investigate the cause, it may be possible to prepare the recurrence of similar patterns of disasters. The vehicle-based system equipped with state-of-the-art sensors has been proposed in order to reconstruct the disaster site as much as possible and help the disaster investigator to analyze the cause of the disaster by providing high-quality information. However, the data quality obtained from the sensors can be lowered due to unpredictable circumstances of disaster site. In this aspect it is essential to provide practical procedures that assess and analyze the performance of the equipment on site. In this paper, we selected critical elements of performance that can evaluate the vehicle-based image acquisition system, since it is the most critical piece of information in the disaster sites. The quality of the images obtained from vehicle-based image system was analyzed and verified on the test site. From the results of spatial resolution based on GRD(Ground Resolved Distance), we were able to identify maximum 5mm of spatial resolution at a distance of 70m distance. The result of field test is expected to be used for data acquisition plan in future disaster situations.

재난은 다양한 형태로 발생하고 있으며, 모든 유형의 재난을 효과적으로 대비하는 것은 현실적으로 어렵다. 그러나 기 발생재난을 재구성하고 그 원인을 면밀히 분석한다면 유사 재난의 재발 방지가 가능할 것이다. 이에 재난현장을 재구성하고 재난 발생의 원인을 과학적으로 규명하기 위해 고품질 데이터 취득 장비를 탑재한 차량기반 시스템을 구축하고 있다. 해당 시스템이 취득하는 데이터는 재난 현장에서 예측하지 못한 변수로 인해 그 품질이 저하될 수 있으므로, 이론적인 시스템의 성능 이외에도 실제 취득된 데이터의 품질을 평가하는 과정이 필요하다. 이에 본 논문에서는 재난 현장의 정밀한 고품질 데이터를 취득하기 위해 구축된 차량 기반 영상취득시스템의 성능을 평가할 수 있는 요소를 선정하고, 데이터를 취득하여 영상의 품질을 검증 및 분석하였다. GRD(Ground Resolved Distance)에 근거한 공간해상력을 중심으로 영상취득시스템의 성능을 평가한 결과, 70m에서 최대 약 5mm의 공간해상력을 갖는 것을 확인하였으며 이러한 성능 평가의 결과는 향후 재난 현장 자료 취득 계획 시 사용될 수 있을 것으로 기대한다.

Keywords

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