An Underwater Image Enhancement Method Based on Local White Balance

Underwater image enhancement is an important low-level task for marine industry. This paper proposed an underwater image enhancement method based on colour constancy theory. Compared with many existing researches, time and space complexity of the method proposed in this paper is low and our method achieves excellent performance. Firstly, we analyzed the underwater imaging model and distortion of underwater images. Then, by compensating the specific channel and local white balance, the linear transformation is performed on the images to restore distortion in the images. Finally, the results are obtained by stretching the histogram on RGB channel and intensity channel of images. Experiments show that our method has achieved excellent performance.