# Image Dehazing Enhancement Strategy Based on Polarization Detection of Space Targets
### Related Work  
In practical application, it is difficult to obtain a satisfactory dehazing effect by directly acquiring the polarization image of the target under haze conditions; it is usually necessary to combine the polarization detection technology with image processing technology or optical imaging analysis method to obtain a better dehazing image.  
[PERSON] et al. proposed the classical polarization dehazing method based on optical imaging analysis. It is a polarization-based differential dehazing method; two orthogonal polarization images are obtained by rotating the polarizer first, then the atmospheric light value at infinity is estimated, and finally, the image of the scene before degradation is restored by using a physical model of atmospheric scattering. Their research laid the foundation of polarization dehazing research [8]. [PERSON] et al. proposed a polarization dehazing method based on priori information to improve the accuracy of atmospheric haze estimation, but the method cannot be effectively applied to scenarios where the priori information is not available [9]. [PERSON] et al. carried out a long-range polarization dehazing experiment and collected a large amount of data under various meteorological conditions, which laid the foundation for applying polarization imaging dehazing technology to the field of space remote sensing [10]. [PERSON] et al. proposed a polarization dehazing method based on the estimation of the angle of polarization, which further improves the accuracy of the dehazing algorithm by replacing the degree of polarization with the angle of polarization [11]. [PERSON] et al. presented a joint dehazing and denoising scheme for an image taken in haze conditions. The model offers a chromaticity-depth compensation regularization for dehazing the image; the proposed scheme increases visibility in extreme weather conditions without amplifying [12].  
Space target detection has the characteristics of long detection distance, low ambient brightness, and less target radiation information. Although the influence of haze on image quality can be eliminated by using the above methods, they are only suitable for scenes with high atmospheric light value brightness or known prior target information, so they are not suitable for space target detection. In order to recover the space target information under haze conditions, it is necessary to estimate the unknown information more accurately, such as atmospheric light value and the degree of polarization at infinity. In addition, to meet the needs of real-time detection, the split-focus planar polarization imaging system based on a Micro-Polarizer Array (MPA) is usually adopted in the space target polarization detection system, but due to the influence of the manufacturing process, MPA contains instantaneous field of view error, which affects the target solving accuracy. At present, there are few studies on the polarization dehazing method specifically for space targets. Therefore, in order to better apply polarization dehazing technology to space target detection, from the perspective of improving the restoration accuracy of space target polarization images, special space target polarization dehazing methods should be studied to improve the detection ability of the detection system.