光学学报, 2019, 39 (7): 0728006, 网络出版: 2019-07-16
基于地面周期靶标的光学遥感相机在轨调制传递函数测量方法 下载: 893次
On-Orbit Measurement of Modulation Transfer Function for Optical Remote Sensing Cameras Based on Periodic Ground Targets
图 & 表
图 2. 传统的基于周期靶标的MTF测量方法的数据处理流程
Fig. 2. Data processing flow of traditional MTF measurement based on periodic targets
图 3. 方波形式的周期信号及经成像系统后的输出示意图
Fig. 3. Schematic of square-wave periodic signal and its output from imaging system
图 4. 采用拟合的MTF测量方法的数据处理流程
Fig. 4. Data processing flow of MTF measurement based on parametric fitting
图 5. MTF仿真测试结果。(a) 高斯型PSF;(b) 周期靶标采样数据及拟合结果;(c) sinc2型PSF;(d) 周期靶标采样数据及拟合结果;(e) 特定形状PSF;(f) 周期靶标采样数据及拟合结果
Fig. 5. Simulated MTF. (a) Gaussian-type PSF; (b) sampling data of periodic targets and fitting result; (c) sinc2-type PSF; (d) sampling data of periodic targets and fitting result; (e) specified-type PSF; (f) sampling data of periodic targets and fitting result
图 6. 图像噪声对MTF测量误差的影响。(a)数据采样及拟合结果;(b) MTF测量误差的变化
Fig. 6. Effect of imaging noise on MTF measurement error. (a) Sampling data and fitting results; (b) variation of MTF measurement error
图 7. 靶标条纹周期匹配偏差对MTF测量的影响。(a)数据采样及拟合结果;(b) MTF测量误差的变化
Fig. 7. Effect of target-periodic matching deviation on MTF measurement error. (a) Sampling data and fitting result; (b) variation of MTF measurement error
图 8. 测量角度匹配偏差对周期匹配误差的影响
Fig. 8. Effect of measuring-angle matching deviation on periodic matching error
图 9. 测量角度匹配偏差对MTF测量误差的影响。(a)数据采样及拟合结果;(b) MTF测量误差的变化
Fig. 9. Effect of measuring-angle matching deviation on MTF measurement error. (a) Sampling data and fitting result; (b) variation of MTF measurement error
图 11. 周期靶标采样数据及拟合结果。(a) 沿轨方向;(b) 垂轨方向
Fig. 11. Sampling data of periodic targets and its fitting result. (a) Along-track direction; (b) cross-track direction
表 1MTF计算结果对比
Table1. Comparison of MTF calculated results
|
表 2不同种类靶标的MTF测试结果
Table2. Results of MTF measurement using different types of ground targets
|
吴泽鹏, 曲耀斌, 赵庆广, 扈宗鑫. 基于地面周期靶标的光学遥感相机在轨调制传递函数测量方法[J]. 光学学报, 2019, 39(7): 0728006. Zepeng Wu, Yaobin Qu, Qingguang Zhao, Zongxin Hu. On-Orbit Measurement of Modulation Transfer Function for Optical Remote Sensing Cameras Based on Periodic Ground Targets[J]. Acta Optica Sinica, 2019, 39(7): 0728006.