基于滑动窗口法的遥感图像纹理统计信息提取研究

遥感图像中地学信息,如地质构造、蚀变信息及岩性分界等信息具有一定的纹理特征。纹理是遥感图像的重要特征,是地物空间特征的综合反映。利用滑动窗口法来获取遥感图像的纹理特征参量,将得到的特征矩阵用假彩色进行显示,将得到的图件进行了对比。然后,针对窗口大小对不同纹理特征显示效果的差异展开讨论。结果表明,滑动窗口法在排除波谱信息的干扰、提取纹理特征参量方面效果比较明显。对于纹理多尺度判别的精度来说,采用较大窗口提取的纹理信息参与分类能使总体显示效果较好,但某些纹理的精细程度有所下降,建议在实际应用中,应根据具体情况选择窗口的大小。

Research on the Extracting Texture Statistic Information in RS Image Based on Sliding Window Method

Geological information such as geological structure,alternation information and lithologic boundary etc.has their respective texture information.The texture is one of the important features of remote sensing image.The texture information of remote sensing is a general reflection of the spatial characteristic for ground object.In this paper the sliding window method was used to get the texture feature in RS image and the characteristic matrix was displayed by false color.Comparison was made with the false color image.The contrast analysis was made on displaying different texture feature effect with the different sizes of window.The test result indicated that the sliding window method can eliminate the interference of the spectrum information and extract the feature of remote sensing texture image effectively.Moreover,for texture discrimination based on multispectral data,the larger the window size for texture extraction was,the more accurate the classification result would become.In practice,such as the boundary effect and the accuracy of some important unit texture,it was considered in the chose of an appropriate window size.