基于反射点源的高分辨率光学卫星传感器在轨调制传递函数检测

发布时间：2018-03-19 02:28

本文选题：遥感　切入点：调制传递函数　出处：《光学学报》2017年07期 　论文类型：期刊论文

【摘要】：调制传递函数(MTF)可用来评估高分辨率光学卫星传感器像质,在轨MTF检测对于高分辨率卫星遥感数据的应用和未来卫星遥感器的发展具有重要意义。提出一种基于反射点源的直接检测方法,利用遥感影像数据计算得到成像系统的点扩展函数(PSF),进而获取系统的MTF值。根据成像关系和点光源图像数据,并利用非线性方程优化求解的方式得到被测光学卫星传感器成像系统的一维线扩展函数值,进而验证了可近似用高斯模型来表征高分辨率光学卫星传感器的PSF。实验结果表明,基于反射点源的光学卫星传感器在轨MTF检测结果与基于刃边靶标的在轨MTF检测结果的差异小于5%,能够实现高分辨率光学卫星传感器的在轨MTF检测。
[Abstract]:Modulation transfer function (MTF) can be used to evaluate the image quality of high resolution optical satellite sensors. On-orbit MTF detection is of great significance for the application of high-resolution satellite remote sensing data and the development of satellite remote sensor in the future. A direct detection method based on reflection point source is proposed. The point spread function of the imaging system is calculated by using the remote sensing image data, and then the MTF value of the system is obtained. According to the imaging relation and the point light source image data, The one-dimensional linear expansion function of the optical satellite sensor imaging system is obtained by solving the nonlinear equation optimally, and it is verified that the PSFs of the high-resolution optical satellite sensor can be represented by using Gao Si model approximately. The experimental results show that, The difference between the in-orbit MTF detection result of optical satellite sensor based on reflection point source and the in-orbit MTF detection result based on edge target is less than 5, which can realize the on-orbit MTF detection of high-resolution optical satellite sensor.
【作者单位】：中国科学院安徽光学精密机械研究所通用光学定标与表征技术重点实验室;中国科学院合肥物质科学研究院;
【基金】：国家自然科学基金(41301374) 中国科学院科技创新基金(CXJJ-14-S89)
【分类号】：TP73;TP751

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