한국측량학회지 (Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography)

  • 제35권6호
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  • Pages.485-494
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  • 2017
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  • 1598-4850(pISSN)
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  • 2288-260X(eISSN)
한국측량학회 (Korean Society of Surveying, Geodesy, Photogrammetry and Cartography)
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단순 전처리 방법과 수정된 지역적 피쳐 추출기법을 이용한 다중 적외선영상 자동 기하보정

Automatic Registration between Multiple IR Images Using Simple Pre-processing Method and Modified Local Features Extraction Algorithm

  • 투고 : 2017.11.20
  • 심사 : 2017.12.28
  • 발행 : 2017.12.31
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초록

본 연구는 단순 전처리 방법과 수정된 지역적 피쳐 추출기법을 이용하여 특성이 다른 적외선영상 자동 기하보정에 초점을 맞추고 있다. 입력영상은 히스토그램 평활화를 통해 중앙값과 절댓값을 이용하여 전처리를 수행하였으며, 추출 피쳐의 유사도를 거리가 아닌 각 개념으로 변경하여 적용함으로써, 영상간 밝기값 차이를 줄이는데 효과적으로 적용할 수 있도록 하였다. 기하보정 결과는 시각적인 방법과 Inverse RMSE 방식을 사용하여 평가하였으며, 영상의 특성 차이로 인해 기존의 지역적 피쳐 추출기법 적용으로 해결될 수 없었던 자동 기하보정이 본 알고리즘을 적용함으로써 높은 정합 신뢰도와 적용 편의성을 보임을 확인할 수 있었다. 이를 통해, 제안 방법이 특정 조건의 다중 센서 영상간 자동 기하보정 기법 중 하나로 사용될 수 있을 것으로 기대한다.

This study focuses on automatic image registration between multiple IR images using simple preprocessing method and modified local feature extraction algorithm. The input images were preprocessed by using the median and absolute value after histogram equalization, and it could be effectively applied to reduce the brightness difference value between images by applying the similarity of extracted features to the concept of angle instead of distance. The results were evaluated using visual and inverse RMSE methods. The features that could not be achieved by the existing local feature extraction technique showed high image matching reliability and application convenience. It is expected that this method can be used as one of the automatic registration methods between multi-sensor images under specific conditions.

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참고문헌

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