Polarization suppression of solar flare on sea surface based on shortwave infrared

Meifan Li; Meng Zhu; Jinsuo Zhang; Yang Liu; Xiangyu Li

doi:10.1117/12.2580215

5 November 2020 Polarization suppression of solar flare on sea surface based on shortwave infrared

Meifan Li, Meng Zhu, Jinsuo Zhang, Yang Liu, Xiangyu Li

Proceedings Volume 11563, AOPC 2020: Infrared Device and Infrared Technology; 115630P (2020) https://doi.org/10.1117/12.2580215
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China

Abstract

In the polarization imaging of shortwave infrared sea surface background, the sea surface flare as a strong interference source seriously reduces the contrast of the image, resulting in low probability of target detection, high false alarm rate, easy to be lost in tracking and other problems, which must be suppressed. The traditional solar flare suppression method suppresses the s component of the solar flare by adding a horizontal polarization filter, ignoring the p component, resulting in a general effect on flare suppression, and can not establish a relationship with the position of the sun and the position of the detector. real-time suppression of solar flare. To solve this problem, a real-time method to suppress solar flare is proposed in this paper. Combined with Cox-Munk model and polarization bi-directional reflection distribution function (pBRDF), the rough sea surface flare reflection model is established, and the polarization filter is adjusted according to the polarization angle of the flare. The related polarization degree and polarization angle images are simulated by MATLAB, and the results are in good agreement with the reality, which verifies the accuracy of the model.

Citation Download Citation

Meifan Li, Meng Zhu, Jinsuo Zhang, Yang Liu, and Xiangyu Li "Polarization suppression of solar flare on sea surface based on shortwave infrared", Proc. SPIE 11563, AOPC 2020: Infrared Device and Infrared Technology, 115630P (5 November 2020); https://doi.org/10.1117/12.2580215

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