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A Robust Estimation Method for Remote Sensing Image Fusion
Author(s): XIA Xiaotian, WANG Bin, ZHANG Liming
Pages: 347-
355,370,封3
Year: 2013
Issue:
3
Journal: Journal of Fudan University(Natural Science)
Keyword: remote sensing image fusion; maximum a posteriori (MAP); robust estimation; graduate non-convexity; simultaneous over-relaxation;
Abstract: 提出一种基于鲁棒估计的遥感图像融合方法.该方法首先建立了高分辨率的多光谱图像到低分辨率的多光谱图像和高分辨率的全色图像之间的观测模型,然后在最大后验概率框架下引入鲁棒估计以增强估计的鲁棒性,最后利用阶段非凸和逐次超松弛方法实现了低分辨率的多光谱图像和高分辨率的全色图像之间的融合.鲁棒估计的引入,大大减小了观测噪声对融合结果的影响,而且省去了目标函数中的正则项,使得融合过程更加简单方便.以QuickBird卫星数据为例的实验结果表明,与其他几种常见方法相比,本方法不仅能够提高多光谱图像的空间分辨率,对光谱信息的保持也具有更好的效果.
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