in these methods, the approach based-on high-order cumulants utilize the local window's correlation of image to compute the three-order cumulants as features . and the other two methods are perfect in spatial-frequency localization 在基于高阶累积量的方法中,利用图象中象素的窗口邻域具有相关性的特点计算图象的三阶累积量作为纹理的特征。