Non-Uniform Illumination Underwater Image Restoration via Illumination Channel Sparsity Prior

Underwater image quality is seriously degraded due to the insufficient light in water. Although artificial illumination can assist imaging, it often brings non-uniform illumination phenomenon. To this end, we develop an illumination channel sparsity prior (ICSP) guided variational framework for non-uniform illumination underwater image restoration. Technically, the illumination channel sparsity prior is built on the observation that the illumination channel of a uniform-light underwater image in HSI color space contains few pixels whose intensity is very low. Then according to the Retinex theory, we design a variational model with L0 norm term, constraint term, and gradient term, by integrating the proposed…

• DO
  Department of Education of Shandong Province
• NN
  National Natural Science Foundation of China

  Awards: 61701245, 62171252, 61901240
• CP
  China Postdoctoral Science Foundation

  Awards: 2021M701903, 2017M612204
• NS
  Natural Science Foundation of Shandong Province

  Award: ZR2019BF042