The study on land cover change detection by using remote sensing technology is one of the most important components in global environment change research.
应用遥感技术进行土地覆盖变化监测研究，是全球环境变化研究的重要组成部分。
Most of the present change detection methods aim at land cover applications using low-resolution images, and generally can not meet the needs of high-precision analysis.
目前大部分变化检测研究主要集中在利用低分辨率卫星影像检测土地利用等宏观应用上，往往不能满足高精度分析的要求。
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