摘要： 随着高分辨率遥感卫星发射数量的增多，高分辨率遥感图像数据应用需求也日益增强，而遥感数据的质量直接影响到其数据应用的可靠性和精确性。为此，对高分辨率遥感图像数据进行图像复原是非常有必要的。针对资源三号卫星电荷耦合装置相机遥感图像高空间分辨率的特点，分析在仅有图像信息的情况下系统调制传递函数(MTF)的在轨测量方法，验证双边缘法的可行性。探讨双边缘线状地物选取方法，同时推导证明二维MTF矩阵的构建方法，并借助二维MTF矩阵对原图像进行修正反转滤波实现图像复原。试验结果表明，复原后的图像质量明显提高。
关键词:
调制传递函数测量,
双边缘法,
图像复原,
电荷耦合装置,
资源三号卫星,
修正反转滤波器
Abstract: At present, with more and more high resolution remote sensing satellites launched in the world, the application demands for high resolution remote sensing images are increased. Meanwhile, the quality of remote sensing images has direct impacts on the reliability and accuracy of applications. Therefore, it is very necessary to restore high resolution image. According to the characteristics of high spatial resolution of ZY-3 satellite Charge-coupled Device(CCD) image, this paper analyzes on-orbit measurement methods of the system Modulation Transfer Function(MTF) only with the image, and determines that double edge method is feasible. In addition, this paper tries to determines the double edge linear objects which are used for the double edge method on the basis of experiment. At the same time, it is proved that the construction method of 2D MTF matrix is derived. With the 2D MTF matrix, the origin image is restored by Modified Inverse Filter(MIF). The test results show that a significant improvement of the image quality is achieved.
Key words:
Modulation Transfer Function(MTF) measurement,
double edge method,
image restoration,
Charge-coupled Device(CCD),
ZY-3 satellite,
Modified Inverse Filter(MIF)
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