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LIU Cheng-lin, ZHAN Jun-tong, ZHANG Su, WANG Chao, FU Qiang, LI Ying-chao, DUAN Jin, JIANG Hui-lin. Research on visible polarized reflection of target material surface based on improved Blinn masking function[J]. Chinese Optics. doi: 10.37188/CO.2023-0217
Citation: LIU Cheng-lin, ZHAN Jun-tong, ZHANG Su, WANG Chao, FU Qiang, LI Ying-chao, DUAN Jin, JIANG Hui-lin. Research on visible polarized reflection of target material surface based on improved Blinn masking function[J]. Chinese Optics. doi: 10.37188/CO.2023-0217

Research on visible polarized reflection of target material surface based on improved Blinn masking function

doi: 10.37188/CO.2023-0217
Funds:  Supported by
  • Available Online: 08 May 2024
  • This paper aims to study the visible light polarization reflection characteristics of typical terrain target materials. To achieve this, an improved Blinn type shadow masking function for traditional "V" surface structural defects is introduced. Additionally, the effects of mirror reflection, diffuse reflection, and volume scattering are comprehensively considered. A six-parameter two-dimensional reflection distribution function model for typical terrain target materials is established. Testing of polarization characteristics is conducted on target samples of different materials (polypropylene plastic sheet, 99 alumina ceramic sheet, iron sheet, green painted aluminum sheet) in the visible light 600 nm wavelength band. A genetic algorithm for parameter inversion is used. The experimental and simulation results show that compared with the traditional "V" shielding model, the polypropylene plastic plate model has the highest accuracy improvement and a 70.61% increase in RMSE percentage in the impact of observation angles on the polarization characteristics of the target material surface at an incidence angle of 50°, relative azimuth angle of 180°, and 0° to 60°. Compared with the two reference models, the DoLP model shows a significant improvement in accuracy at an incidence angle of 50°, observation angle of 50°, and relative azimuth angle of 90° to 270°. The model accuracy has improved by at least 24.73 percentage points. The minimum root mean square error of linear polarization is only 1.29%. For the material in this article, the polarization characteristics depend on the value of its complex refractive index. When the incident angle is determined, the observation angle is between 0° and 60°, and the relative azimuth angle is between 0° and 360°. The larger the n/k ratio, the higher the peak of the linear polarization degree. In the visible light band, the wavelength has little effect on the degree of linear polarization.

     

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