Convergence research of low-light image enhancement method and vehicle recorder

영역 분할과 로컬 히스토그램을 이용한 저조도 환경의 영상 향상 방법과 차량 블랙박스 융합

  • Hwang, Woo-Sung (Department of Electronic, Electrical, Control & Instrumentation Engineering, Hanyang University) ;
  • Choi, Myung-Ryul (Division of Electronics Engineering, Hanyang University)
  • 황우성 (한양대학교 전자전기제어계측공학과) ;
  • 최명렬 (한양대학교 전자공학부)
  • Received : 2016.10.27
  • Accepted : 2016.12.20
  • Published : 2016.12.31


In this paper, we propose an image enhancement method for vehicle recorder by dividing the images into sub-images and finding local histograms of the sub-images. The proposed method includes the following steps. Firstly, the input image is divided into ($N{\times}M$) pieces. And the sub-images are used to make groups using the adjacent piece-images (eg. piece-imagei,j, piece-imagei,j+1, piece-imagei+1,j and piece-imagei+1,j+1). Secondly, the contrast enhancement processes are executed using the local histogram of the sub-images. Finally, overall image is reconstructed by using a transfer function that reflects the characteristics of the sub-image. The proposed method might achieve more enhanced images for vehicle recorder by suppressing excessive image contrast.


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