Remote sensing image change detection is to analyze the same area of remote sensing images at different phases, which extract information of interest to change.
遥感图像变化检测是分析同一地区不同时相的遥感图像，提取出其中感兴趣的变化信息。
The remote sensing image change detection is a technique to acquire change information of observed objects through contrast and analysis of remote sensing images of the same region at different time.
遥感图像变化检测技术是通过对比分析同一地域不同时相的遥感图像，获取观测对象变化信息的技术。
Shadow is one of the features in remote sensing image. It affects image matching, change detection or information extraction. But removing that is usually very hard in image processing.
阴影是遥感影像的基本特征之一，它将干扰图像匹配、图象变化检测或图像中信息的提取，而去除阴影则是遥感图像处理的难题。
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