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顾及阴影信息的高分辨率遥感图像变化检测方法

DOI: 10.6046/gtzyyg.2013.04.03, PP. 16-21

Keywords: 图像变化检测,阴影提取,图像分割,光谱信息,几何信息

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Abstract:

阴影是遥感图像的解译标志之一,然而在利用高分辨率遥感图像对城市建筑物进行变化检测时,阴影的存在会对变化检测结果造成不利的影响。为此,提出一种顾及阴影信息的遥感图像变化检测方法。首先对遥感图像中的阴影进行提取,然后用提取的阴影补偿初始的变化检测结果以提高变化检测精度。该方法的关键在于阴影提取的准确性。在面向对象分类方法的框架下,从阴影的光谱信息和几何信息2个方面对阴影进行约束,从而较好地提取出阴影。实验证明,上述方法能够较好地解决阴影所引起的变化检测中的错判问题,有效地提高遥感图像变化检测的精度。

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