摘要
SAR图像仿真的研究对于SAR图像目标识别与解译研究具有重要意义。提出了一种基于栅格化模型生成回波的SAR图像仿真方法:将目标的三维模型映射到栅格平面中,运用射线跟踪原理,获取目标几何信息计算回波并成像处理获得仿真图像。该方法与传统方法相比,射线跟踪的计算复杂度不依赖于原始模型面元数目,提高了计算速度,同时,可以通过调节栅格化采样率实现不同的仿真精度,满足不同的应用需求。实验结果表明,通过该方法获得的仿真图像与真实图像匹配度高,该方法可以有效辅助SAR图像目标解译工作。
SAR image simulation is very important to radar target recognition and SAR image interpretation.This paper proposed a scheme of SAR echo and image simulation based on gridding model：the 3Dmodel of target is mapping to the gridding surface,ray tracing algorithm is implemented to get the surface parameters of target,and then simulate the echo signal and formulate the image.Compared with traditional method,in this scheme,the complexity of ray tracing is independent of the account of facets in original model,and the computation speed is improved,also the sampling rate of gridding can be adjusted to implement different simulation accuracy of application requirements.Some experiments demonstrate the efficiency of the simulator,which will offer a well value to assist the interpretation of targets.
出处
《国外电子测量技术》
2014年第7期59-63,共5页
Foreign Electronic Measurement Technology
关键词
合成孔径雷达
SAR图像仿真
栅格化
synthetic aperture radar（SAR）
SAR image simulation
gridding model
