通过开展仿真实验和理论分析,系统地研究大气、靶标倾角、靶标对比度和随机噪声、边缘探测精度和ERF拟合模型对调制传递函数(MTF)评价精度的影响,并对各种仿真参数下的MTF总体评价精度进行分析. 分析结果对利用刃边法开展在轨MTF评价具有指导意义.
Modulation transfer function (MTF) is a key parameter for assessment of the imaging performance of in-flight optical sensors. This study focuses on the influences of major factors on the accuracy of knife-edge method by using theoretical analysis and simulation experiments. The analyzed factors include atmosphere, the incline angle of target, the contrast and random noise of target, the edge detection accuracy, and the ERF curve-fitting model. Accuracies in MTF assessment under different simulation parameters are also analyzed. The analysis results are instructive for implementation of on-orbit MTF assessment using knife-edge method.
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