卫星振动综合成像仿真(英文)  

Synthetical imaging simulation of satellite vibration

作　　者：唐秋艳[1] 唐义[1] 王晓燕[1] 倪国强[1] 

机构地区：[1]北京理工大学光电学院光电成像技术与系统教育部重点实验室,北京100081

出　　处：《红外与激光工程》2012年第3期803-810,共8页Infrared and Laser Engineering

基　　金：国家973计划(2009CB724005);国家自然科学基金(40804048);国家863计划(2007AAl2Z101)

摘　　要：卫星平台的振动会导致曝光时间内光学相机和物体之间的相对运动,从而严重影响了成像质量。但实际中图像的退化形式较为复杂,而且很难确定退化图像的退化形式和退化参数,而图像的退化仿真为解决该问题带来了极大的便利。通过分析卫星平台振动规律及其对图像的影响,提出了一个新的概念———像移路径,并提出了基于像移矩阵的等权时间图像退化方法。该方法使得退化仿真过程综合了卫星的所有姿态和频段的振动带来的影响。因此,已知卫星振动函数和原始图像,即可仿真生成退化图像。通过仿真图像频谱特性的理论值与实验值的对比分析,验证了该仿真方法的可靠性。The vibration of satellite platform would lead to the relative motion between the optical camera and the scene during the exposure time,seriously affecting the image quality.However,the degradation form of the actual images is much more complex,which makes the degradation form and the degradation parameters very difficult to determine.Fortunately,the simulation of degraded images brings a great convenience to improve the situation.By analyzing the characters of satellite vibration and its impacts on images,the path of image motion was proposed as a new conception,and equal weight degradation method based on the matrix of image motion was put forward.In the simulation process,synthetical vibration of all attitudes and frequency was considered.Once the vibration functions of satellite and the original image were got,the degraded image could be generated.Moreover theoretical analysis of simulated images′ spectrums was done to prove the reliability of simulation.

关 键 词：卫星平台 仿真 退化 振动 

分 类 号：TN911.73[电子电信—通信与信息系统]