Propagation of cross - correlation function in divided - wavefront interferometry 分波前干涉法中空间互相关函数的传输
Cross - correlation function 互相关函数
The original pitch detection algorithm in wi coder is based on normalized cross - correlation function ( nccf ) 本课题wi编码器原本采用基于归一化互相关函数( normalizedcross - correlationfunction , nccf )的基音检测算法。
The diffraction formula and statistical law of optical fields are used to get the cross - correlation function of intensities of laser speckles of the moved diffuse object 该方法利用光传播的菲涅尔衍射公式和光场的统计规律,给出散斑场光强在散射体位移前后的高斯光束相关函数的表达式。
The signal process function of the software include these function : digital filter , windowing , auto - correlation function and cross - correlation function , mean and variance , probability density function and probability distribution function statistic ; auto - power spectrum , cross - power spectrum , frequency response function , coherence function , cepstrum analysis based on fft ( fast fourier transfer ) ; joint time - frequency analysis based on stft ( short - time fourier transfer ) 软件的处理功能包括:数字滤波、时域加窗、自相关与互相关处理、均值和方差计算、概率密度和概率分布函数计算;在快速傅立叶变换( fft )基础上计算自功率谱、互功率谱、频率响应函数、相干函数、倒频谱分析;基于短时傅立叶变换( stft )的联合时频分析等。