# Dynamic Dark Channel Prior Dehazing with Polarization
## 4 Experimental Results and Discussion
### Polarization-Based Dark Channel Prior Processing
The polarization characteristics of the object are closely related to the spectrum; therefore, it is necessary to further analyze the intensity of the polarization information in different color channels. Figure 12a-c,e,f provides the RGB channels of the dehazed scene image and the polarization degree image, respectively. The contrast of regions 1-2 is used to quantitatively describe the polarization recognition effect differences of different color channels. \begin{table}
\begin{tabular}{c c c c} \hline \hline  & \multicolumn{3}{c}{**Contrast**} \\ \cline{2-4}
**Scene/Time** & **Original** & **DCP** & **PDCP** \\ \hline (a)/\(t_{1}\) & 0.046 & 0.104 & 0.142 \\ (a)/\(t_{2}\) & 0.035 & 0.091 & 0.217 \\ (a)/\(t_{3}\) & 0.033 & 0.091 & 0.233 \\ (a)/\(t_{4}\) & 0.032 & 0.087 & 0.236 \\ (a)/mean value & 0.036 & 0.093 & 0.207 \\ (b)/\(t_{1}\) & 0.155 & 0.336 & 0.411 \\ (b)/\(t_{2}\) & 0.104 & 0.271 & 0.307 \\ (b)/\(t_{3}\) & 0.030 & 0.211 & 0.289 \\ (b)/\(t_{4}\) & 0.144 & 0.313 & 0.402 \\ (b)/mean value & 0.108 & 0.282 & 0.352 \\ (c)/\(t_{1}\) & 0.311 & 0.528 & 0.694 \\ (c)/\(t_{2}\) & 0.164 & 0.339 & 0.607 \\ (c)/\(t_{3}\) & 0.159 & 0.411 & 0.481 \\ (c)/\(t_{4}\) & 0.214 & 0.379 & 0.597 \\ (c)/mean value & 0.212 & 0.414 & 0.594 \\ (d)/\(t_{1}\) & 0.093 & 0.166 & 0.270 \\ (d)/\(t_{2}\) & 0.120 & 0.163 & 0.183 \\ (d)/\(t_{3}\) & 0.097 & 0.139 & 0.310 \\ (d)/\(t_{4}\) & 0.085 & 0.091 & 0.216 \\ (d)/mean value & 0.122 & 0.140 & 0.244 \\ (e)/\(t_{1}\) & 0.288 & 0.361 & 0.459 \\ (e)/\(t_{2}\) & 0.339 & 0.627 & 1.088 \\ (e)/\(t_{3}\) & 0.151 & 0.279 & 0.341 \\ (e)/\(t_{4}\) & 0.197 & 0.406 & 0.835 \\ (e)/mean value & 0.244 & 0.418 & 0.795 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: The contrast of the dynamic target within the time interval \(t_{1}\)–\(t_{4}\). Figure 11: Comparison of light intensity image and polarization image. (**a**) Original scene image. (**b**) Dark channel prior to dehazing the scene image. (**c**) Polarization-based dark channel prior to dehazing the scene image. (**d**) Characterization capabilities of different programs. Figure 12: Images of different color channels. Dehazed scene image in the (**a**) R channel, (**b**) G channel, and (**c**) B channel. The degree of polarization image in the (**d**) R channel, (**e**) G channel, and (**f**) B channel. This is due to the following physical reasons: the light intensity distributions of the target in regions 1 and 2 are weak in the B color channel, and the surface is relatively smooth, which reduces the degree of diffuse reflection. Therefore, the degree of polarization in the channel is large; the corresponding dataset is shown in Table 4. The bluish gauze in region 3 of the scene is reflecting more blue light components in the process of propagation, which results in an increase in the number of diffuse reflections on its surface; thus, the image in the B channel shows an increased degree of depolarization. The main focus of this chapter is on the performance of the polarization imaging system for detecting and recognizing dynamic targets in foggy conditions. The polarization imaging system is used to acquire the original images of each polarization channel for a dynamic target scene within a certain time interval. The degree of polarization of the images is obtained by dehazing the original images using the dark channel prior method and by integrating the polarization information with the dehazed images. The specific regions of interest of the above three sets of images are compared and quantitatively analyzed, and the merits and demerits of different approaches for target representation ability are evaluated. Moreover, by investigating the enhancement effect of different color channel images on target features, the relationship between polarization features and spectrum is thoroughly analyzed.