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目标的偏振散射特征研究是偏振遥感应用的基础。在不同的条件下测量了伪装涂层的偏振参数,研究了入射角、观测方位角对涂层偏振散射特征的影响。研究发现,伪装涂层的面散射会产生较大的偏振度,而体散射具有消偏振效应;深色涂层因为面散射起主要作用而具有较大的偏振度;涂层散射光的偏振度与入射角成正比,在观测方位角接近镜面反射方向时最大,随着方位角的增加而迅速减小;草地的偏振度很小,与伪装涂层形成鲜明对比。利用偏振遥感可以有效地识别草地背景中的伪装目标,偏振测量在遥感和目标识别方面具有重要意义。
The research on the target’s polarization scattering characteristics is the basis of the application of polarization remote sensing. The polarization parameters of camouflage coatings were measured under different conditions. The effects of incident angle and azimuth on the polarization scattering characteristics were investigated. It is found that the surface scattering of the camouflage coating will produce greater degree of polarization and the bulk scattering will have the effect of depolarization. The dark color coating has a greater degree of polarization due to the primary effect of surface scattering. The degree of polarization Which is proportional to the incident angle and largest when the observed azimuth angle is close to the specular reflection direction and decreases rapidly with the increase of the azimuth angle. The degree of polarization of the grassland is small, which is in sharp contrast with the camouflage coating. Polarization remote sensing can effectively identify camouflage targets in grassland background. Polarimetric measurements are of great importance in remote sensing and target recognition.