| 刃边法的MTF评价精度分析 |
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| 作者姓名： | 刘亮 李显彬 姜小光 吴玮 张宝军 杨典华 |
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| 作者单位： | 1. 民政部国家减灾中心, 北京 100124;2. 中国科学院光电技术研究所, 成都 610209;3. 中国科学院研究生院, 北京 100049;4. 首都师范大学, 北京 100048 |
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| 基金项目： | 国家科技支撑计划(2008BAK49B01,2008BAK49B07)资助 |
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| 摘 要： | 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.
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| 关 键 词： | 调制传递函数(MTF) 刃边法 仿真分析 |
| 收稿时间： | 2011-10-20 |
| 修稿时间： | 2011-11-25 |
Accuracy of knife-edge method in MTF assessment |
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| Authors: | LIU Liang LI Xian-Bin JIANG Xiao-Guang WU Wei ZHANG Bao-Jun YANG Dian-Hua |
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| Institution: | 1. National Disaster Reduction Center of China, Beijing 100124, China;2. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China;3. Graduate University, Chinese Academy of Sciences, Beijing 100049, China;4. Capital Normal University, Beijing 100048, China |
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| Abstract: | 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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| Keywords: | modulation transfer function (MTF) knife-edge method simulation experiments |
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