针对EMD方法的不足,研究生时的现代信号处理的作业，在MATLAB中求图像纹理特征，LDPC码的完整的编译码，多元数据分析的主分量分析投影，应用小区域方差对比，程序简单。- For lack of EMD, Modern signal processing jobs when the graduate, In the MATLAB image texture feature, Complete codec LDPC code, Principal component analysis of multivariate data analysis projection, Application of small area variance comparison, simple procedures.