基于海浪谱修正方法的海面建模

Sea Surface Modeling Based on Ocean Wave Spectrum Correction Method

海面场景偏振特性研究对于红外偏振目标检测具有重要意义,海面建模是进行海面偏振仿真研究的关键环节。分析了海浪谱模型和空间采样点数对海面建模的影响,建立了将海浪谱的高频分量以指数形式叠加到低频分量的修正方法。将RadTherm软件与偏振度计算模型相结合,对比研究了所提方法与传统方法模拟生成海面的长波红外偏振特性。仿真结果表明,所提方法可以在低空间采样率下有效提高模拟生成海面的高度分布、微面元斜率分布与海面实测数据的吻合度。

The study of polarization characteristics of sea surface scene is of great significance to infrared polarization target detection, and sea surface modeling is the key step of sea surface polarization simulation. The influence of wave spectrum model and spatial sampling points on sea surface modeling is analyzed, and a correction method is established, which superimposes the high frequency component of wave spectrum to the low frequency component in the exponential form. Combining RadTherm software with the polarization degree calculation model, the long-wave infrared polarization characteristics of simulated sea surface generated by the proposed method and the traditional method are compared.The simulation results show that the proposed method can effectively improve the consistency among the height distribution of simulated sea surface, the microfacet slope distribution of simulated sea surface and the measured sea surface data at a low spatial sampling rate.