摘要
调制传递函数(MTF)是光学成像系统性能的一个重要的综合评价指标,也是图像退化模型中最重要的部分。针对TDI-CCD成像数据的特点,从遥感图像中获取刀刃边缘来计算成像系统的MTF,采用维纳滤波法及修正的逆滤波器法(MIF)对退化图像进行MTF补偿处理。实验结果表明,高分辨率TDI-CCD成像数据经自适应MTF复原处理后,可以有效地改善图像质量。目前,该算法已成功地应用到我国国产地面卫星预处理系统中。
The Modulation Transfer Function （MTF） is an important comprehensive evaluation index for the performance of the optical imaging system and also the most important part of image degradation model. According to the characteristics of TDI - CCD image data, this paper discussed the ways of calculating MTF of the image system based on the edge detection in remote sensing image, and implementing MTF compensation to the degradation image with winner filter and modified inverse filter （ MIF ） respectively. The results show that the adaptive MTF restoration processing method can effectively improve image quality of high resolution TDI - CCD image data. At present, this method has been successfully applied to the domestic ground satellite pre -processing system in China.
出处
《国土资源遥感》
CSCD
2010年第4期23-28,共6页
Remote Sensing for Land & Resources
关键词
TDI—CCD
调制传递函数
图像复原
TDI - CCD
Modulation Transfer Function （MTF）
Image restoration
