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Texture Mapping of a Bridge Deck Using UAV Images

무인항공영상을 이용한 교량 상판의 텍스처 매핑

  • Nguyen, Truong Linh (Department of Civil and Environmental Engineering, Chonnam National University) ;
  • Han, Dongyeob (Department of Marine and Civil Engineering, Chonnam National University)
  • ;
  • 한동엽 (전남대학교 해양토목공학과)
  • Received : 2017.09.29
  • Accepted : 2017.10.25
  • Published : 2017.10.31

Abstract

There are many methods for surveying the status of a road, and the use of unmanned aerial vehicle (UAV) photo is one such method. When the UAV images are too large to be processed and suspected to be redundant, a texture extraction technique is used to transform the data into a reduced set of feature representations. This is an important task in 3D simulation using UAV images because a huge amount of data can be inputted. This paper presents a texture extraction method from UAV images to obtain high-resolution images of bridges. The proposed method is in three steps: firstly, we use the 3D bridge model from the V-World database; secondly, textures are extracted from oriented UAV images; and finally, the extracted textures from each image are blended. The result of our study can be used to update V-World textures to a high-resolution image.

도로의 상태를 관측하는 많은 방법의 하나로 무인항공기 영상이 사용된다. 무인항공기 영상 파일이 너무 크고, 불필요한 정보가 많을 때, 특징적 정보를 압축한 텍스처 추출 기법이 사용된다. 특히 무인항공기 영상을 이용한 3차원 시뮬레이션에서 많은 양의 데이터가 입력되기 때문에 텍스처 추출이 중요하다. 본 논문에서는 교량의 고해상 영상을 얻기 위하여 무인항공기 영상으로부터 텍스처 추출 방법을 제시한다. 제안된 방법은 3단계로 이루어진다. 첫째, 브이월드 데이터베이스에서 3차원 교량 모델을 취득한다. 둘째, 기하보정 정보를 가진 무인항공기 영상에서 텍스처를 추출한다. 셋째, 개별 영상에서 추출된 텍스처를 융합한다. 본 연구 결과는 브이월드 텍스처를 고해상 영상으로 갱신하는 데 사용될 수 있다.

Keywords

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