各向异性大气湍流中成像仿真研究

Investigation of Imaging Simulation in Anisotropic Atmospheric Turbulence

大气湍流降低成像质量,一直以来是制约远距离光电成像探测的瓶颈问题。通过对大气湍流中成像仿真进行研究,一方面可以评估光电成像探测系统性能,同时还可以为图像处理算法验证、目标识别等提供测试数据。本文主要针对各向异性非Kolmogorov大气湍流中成像仿真开展研究,通过利用图像处理和各向异性非Kolmogorov大气湍流理论成像模型相结合的方法,实现了综合考虑各向异性系数、成像波长、接收器孔径、传播路径等物理参量的各向异性湍流中成像快速仿真。通过与随机相位屏仿真方法和图像处理成像仿真方法分别从仿真时间和仿真精度两个方面进行对比分析,结果表明本文方法仿真时间短,同时也能较好地反映大气湍流对光学成像系统的影响。

The atmospheric turbulence degrades the image quality,which is a bottleneck for improving the performance of long range photoelectronic imaging detection. By making the research of image simulation in atmospheric turbulence,the performance of photoelectronic imaging detection system can be evaluated,and the test data for image processing algorithm verification and target recognition can be provided. In this work,the imaging simulation in anisotropic non-Kolmogorov atmospheric turbulence is performed. By combining the image processing algorithm with the theoretical imaging model in anisotropic non-Kolmogorov atmospheric turbulence,the rapid imaging simulation in anisotropic atmospheric turbulence considering physical parameters including anisotropic coefficient,imaging wavelength,receiver aperture and propagation path is realized. Compared with the simulation methods of random phase screen and pure image processing from simulation time and accuracy respectively,the results show that the proposed method costs shorter simulation time and achieves better imaging effects.