包括广义互相关函数GCC时延估计，在MATLAB中求图像纹理特征，可以得到很精确的幅值、频率、相位估计，连续相位调制信号(CPM)产生，复化三点Gauss-lengend公式求pi，应用小区域方差对比，程序简单。- Including the generalized cross-correlation function GCC time delay estimation, In the MATLAB image texture feature, You can get a very accurate amplitude, frequency, phase estimation, Continuous phase modulation signal (CPM) to produce, Complex of three-point Gauss-lengend the Formula pi, Application of small area variance comparison, simple procedures.