基于大尺度纹理特征描述算子，对图像纹理特征描述性更好，更好的把握图像的粗粒特征，对光照姿态表情变化的鲁棒性更好-Based on large-scale texture descr iption operator, descr iption of the image texture features better and better grasp the coarse image characteristic changes in the expression for illumination