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一种基于面积对称模型的土地利用/覆被真伪变化图斑检测方法

DOI: 10.3724/SP.J.1047.2014.00784, PP. 784-789

Keywords: 土地覆被变化,空间配准误差,真/伪变化检测精度,总体检测精度,面积对称模型,伪变化

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Abstract:

不同时相土地利用/覆被数据间的空间配准误差,是产生土地利用/覆被伪变化图斑的一个主要原因。本文从土地利用/覆被原始图斑与其相邻的变化图斑间的空间关系角度,提出了由同一原始图斑产生的土地利用/覆被伪变化图斑的面积对称理论,设计和实现了针对因空间配准误差而导致的土地利用/覆被伪变化图斑自动化检测模型,并以内蒙古自治区通辽市奈曼旗1980年和2000年两期土地利用/覆被图对该模型进行了实验模拟。结果表明当两期数据的空间配准误差不超过原始影像1个像元时,总体检测精度达到90%以上;误差不超过5个像元时,总体检测精度达到80%以上;误差不超过原始影像10个像元时,总体检测精度达到70%以上。同时,由于运行时唯一需设定的面积对称系数阈值可设为0.2-0.4(默认设为0.3),该检测模型可适用于由空间配准误差引起的伪变化图斑的自动检查,可满足由于空间配准误差所引起土地利用/覆被伪变化图斑剔除的需求。

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