中文说明：基于互功率谱的时延估计，实现了图像的加水印，去噪，加噪声等功能，计算两个矩阵之间的欧氏距离，ML法能够很好的估计信号的信噪比,包括最小二乘法、SVM、神经网络、1_k近邻法,中介真值程度度量，基于中介真值程度度量的图像分。
English Description：
Time delay estimation based on cross power spectrum, realize Image Watermarking, noise reduction, plus features such as noise, calculate the Euclidean distance between two matrices, ML method can be a good estimation of the signal to noise ratio, including least squares, SVM and neural networks, 1_k nearest neighbor method, medium truth scale measurement based on the measure of medium truth scale image.