# Underwater Degraded Image Restoration by Joint Evaluation and Polarization Partition Fusion
## 4 Conclusions  
In this paper, we propose an underwater degraded image restoration method by joint evaluation and polarization partition fusion. Underwater targets are complex in composition and contain complex polarization properties. For a low polarization region, since its polarization is similar to the polarization of backscattered light, it is impossible to distinguish between the target and the background. But our method can effectively solve this problem. As can be seen from the results of multiple experiments in Figure 9, the EME, Entropy, and Contrast values of this paper's method are significantly better than those of the other methods listed in this paper. Therefore, the method in this paper can effectively recover degraded underwater images, increase the image contrast, improve the image quality, and realize image restoration. The results of this paper provide a research basis for underwater polarization image restoration and enhancement in specific cases, while the robustness and adaptive ability of the algorithm still need to be improved. Applying deep  
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Underwater** & \multicolumn{3}{c}{**Joint Evaluation Indicators**} \\ \cline{2-4}
**Experiment 3** & **EME \(\uparrow\)** & **Entropy \(\uparrow\)** & **Contrast \(\uparrow\)** \\ \hline Origin Image & 2.528 & 4.738 & 1.202 \\ [PERSON]’s method & 4.916 & 3.866 & 0.803 \\ [PERSON]’s method & 3.902 & 4.808 & 4.491 \\ [PERSON]’s method & 5.226 & 4.210 & 4.654 \\ Our method & 5.067 & 5.193 & 4.615 \\ \hline
**Underwater** & \multicolumn{3}{c}{**Joint Evaluation Indicators**} \\ \cline{2-4}
**Experiment 4** & **EME \(\uparrow\)** & **Entropy \(\uparrow\)** & **Contrast \(\uparrow\)** \\ \hline Origin Image & 2.130 & 5.363 & 2.242 \\ [PERSON]’s method & 3.614 & 4.490 & 2.034 \\ [PERSON]’s method & 4.902 & 4.955 & 4.648 \\ [PERSON]’s method & 5.239 & 4.550 & 6.585 \\ Our method & 4.365 & 5.560 & 7.029 \\ \hline \hline \end{tabular}
\end{table}
Table 2: _Cont._  
Figure 9: Three-dimensional bar graph of experimental.  
learning for further refinement and improvement is our aim for future work [23]. The run rate of our algorithm is not ideal and also can be improved in the future.  
[PERSON], [PERSON] and [PERSON] proposed the idea of the paper. [PERSON], [PERSON], [PERSON] and [PERSON] helped manage the annotation group and helped clean the raw annotation. [PERSON] conducted all experiments and wrote the manuscript. [PERSON], [PERSON] and [PERSON] revised and improved the text. [PERSON], [PERSON] and [PERSON] are the people in charge of this project. All authors have read and agreed to the published version of the manuscript.  
This research was funded by [Science and Technology Foundation of State Key Laboratory] grant number [2022-JCJQ-L8-015-0201], [Liaoning Provincial Department of Education Scientific research funding project] grant number [LJKZ0475] and [Dalian High-Level Talent Innovation Support Program] grant number [2022 RJ03].  
Not applicable.  
The raw data supporting the conclusions of this article will be made available by the authors on request.  
The authors declare no conflicts of interest.