2021 IEEE International Conference on Image Processing

19-22 September 2021 • Anchorage, Alaska, USA

Imaging Without Borders

2021 IEEE International Conference on Image Processing

19-22 September 2021 • Anchorage, Alaska, USA

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Paper Detail

Paper IDTEC-2.8
Paper Title RETINEX UNDERWATER IMAGE ENHANCEMENT WITH MULTIORDER GRADIENT PRIORS
Authors Peixian Zhuang, Tsinghua University, China
SessionTEC-2: Restoration and Enhancement 2
LocationArea G
Session Time:Tuesday, 21 September, 15:30 - 17:00
Presentation Time:Tuesday, 21 September, 15:30 - 17:00
Presentation Poster
Topic Image and Video Processing: Restoration and enhancement
IEEE Xplore Open Preview  Click here to view in IEEE Xplore
Abstract We develop a variational retinex algorithm for enhancing single underwater image with multiorder gradient priors of reflectance and illumination. First, a simple yet effective color correction approach is used to remove color casts and recover naturalness. Then, a variational retinex model for enhancing the color-corrected underwater image is established by imposing multiorder gradient priors of reflectance and illumination. According to structural sparsity difference between illumination and reflectance, the l1 norm is accurately adopted to model piecewise and piecewise linear approximations on the reflectance, while the l2 norm is appropriately employed to enforce spatial smoothness and spatial linear smoothness on the illumination. Next, a complex underwater image enhancement issue is turned into simple denoising subproblems, which can be addressed by an efficient optimization algorithm that is fast performed on pixel-wise operations without requiring additional prior knowledge about underwater imaging conditions. Final experiments demonstrate that the proposed method yields better results of qualitative and quantitative assessments than several traditional and leading underwater image enhancement approaches.