A two-stage underwater image enhancement method
Weidong Zhang, Lili Dong, Wenhai Xu · 2021 2nd International Conference on Information Science and Education (ICISE-IE) · 2021
Scattering and absorption result in color shift and low visibility of underwater images. To handle the mentioned issues, this paper proposes a two-stage underwater image enhancement method. In the first stage, this paper proposes a piece-wise linear stretching method to remove the color shift. In the second stage, this paper introduce a contrast enhancement method based on local mean value to improve the contrast and detail of the output image, which uses a sliding window to enhance each pixel value by scanning pixel-by-pixel. Experiments on a real-world underwater image enhancement dataset demonstrate that the proposed method outperforms several state-of-the-art methods in qualitative and quantitative.