中文摘要：

为确定高分遥感成像系统MTF对土地利用图斑边界提取的作用规律,通过改变MTF值,并利用面向对象影像分析方法确定土地利用图斑边界提取误差,建立了MTF值与土地利用图斑边界提取误差之间的函数关系。结果表明,当MTF值大于0.35时,边界提取误差小于1%;当MTF值小于0.25时,边界提取误差快速增加;MTF值与边界提取误差间大致服从一种对数函数关系。进一步分析表明,土地利用图斑间光谱可分性和图斑面积越大,则边界提取误差越小。

英文摘要：

In order to confirm the rules of the modulation trancter function（MTF） of the high spatial resolution remote sensing imaging system to the boundary extraction in land use patches,by changing the MTF value of the high spatial resolution remote sensing imaging system,and determining the errors of the boundary extraction in land use patches with the OBIA approach,the function relationships between the MTF values and the errors of the boundary extraction in land use patches were established.Experimental results show that the errors of the boundary extraction in land use patches are less than 1% as the MTF values are greater than 0.35 and rapidly increase when the MTF values are less than 0.25.The MTF values and the corresponding errors of the boundary extraction in land use patches approximately obey the logarithmic relationships.Further analysis reveals that the larger the spectral separability between land use patches and patch size,the smaller the error of the boundary extraction in land use patches.