CAJ | 학술논문

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.
위성평태적진동회도치폭광시간내광학상궤화물체지간적상대운동,종이엄중영향료성상질량.단실제중도상적퇴화형식교위복잡,이차흔난학정퇴화도상적퇴화형식화퇴화삼수,이도상적퇴화방진위해결해문제대래료겁대적편리.통과분석위성평태진동규률급기대도상적영향,제출료일개신적개념——상이로경,병제출료기우상이구진적등권시간도상퇴화방법.해방법사득퇴화방진과정종합료위성적소유자태화빈단적진동대래적영향.인차,이지위성진동함수화원시도상,즉가방진생성퇴화도상.통과방진도상빈보특성적이론치여실험치적대비분석,험증료해방진방법적가고성.
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.