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以渭干河——库车河三角洲绿洲为例,利用SAR数据,采用不同的分类方法来提取该研究区盐渍化土地覆盖信息。首先用Enhanced frost滤波算法对SAR图像进行去噪处理。然后基于灰度共生矩阵理论提取去噪后的SAR图像4种纹理特征,并在不同窗口大小下筛选出有效的纹理特征。最后结合纹理特征分别采用最大似然分类法和SVM分类法对SAR图像进行分类。研究结果表明:基于纹理特征的SVM分类方法,能够有效解决单源数据信息图像分类效果破碎问题;13×13窗口的总精度达到98.2456%,Kappa系数达到0.9763,更有利于遥感图像分类和盐渍化信息监测,是地物遥感信息提取的有效途径。 更多还原

【Abstract】 Support Vector Machine(SVM) is a new-style classification method.The authors took the Delta oases of Weigan and kuqa rivers as examples,using SAR data and different methods to extract the salinization cover information.Firstly,the speckles from SAR image are eliminated by the enhanced Frost filter algorithm.Then the texture features of the denoised SAR image are extracted based on gray co-occurrence matrix,and the effective texture features are screened through the different size windows.At last... 更多还原