【摘要】 调制传递函数(MTF)较之仅凭借某一个数字量(分辨率、清晰度等)来对成像系统进行质量评价更具有权威性。刃边法适合卫星在轨的特性,易于实现,无需人工对在轨遥感器输入激励信号。本文在实现刃边法计算图像MTF的算法的基础上,通过仿真,分析了像移、刃边角度、噪声对MTF计算结果的影响,并对算法精度进行了检验。仿真结果表明,本文的计算在轨卫星图像MTF的方法具有较高的精度,并且能较好地抵抗噪声。更多还原

【Abstract】 Modulation Transfer Function(MTF) is more authoritative in measuring the spatial performance of imaging system than other parameters.Edge method is applicable for in-orbit satellite image MTF measurement and is easy to implement.On the basis of implementation of MTF measurement using edge method,this paper studies the influence of image shift,edge angle and noise to MTF by simulation,and testes the precision of the method.Simulation result demonstrates that this method is precise and noise-resistant in MTF measurement.更多还原