Abstract:Affected by the scattering of micro-particles in turbid water, optical imaging faces the problems of short imaging distance and poor image quality. In this paper, an improved active polarization imaging method is introduced into the descattering process to achieve higher imaging contrast. Compared with the passive polarization imaging model, the introduction of an active light source can perform polarization modulation on the incident light, which better serves the underwater optical transmission model to separate and solve the target information. For the first time, the S2 component of Stokes vectors based on the common mode suppression is used to eliminate the interference of the target information. Therefore, the polarization degree of backscattered light is accurately reconstructed. Meanwhile, introducing contrast as feedback optimization is to achieve determination of optimal parameters. The imaging experiments with different types of targets prove the effectiveness of the method under various turbidities water. Especially at strong scattering water, the imaging contrast is improved by more than 2 times. It is of great scientific value to introduce the polarization information into the enhancement and restoration of the target information.
