这是一个好用的频偏估计算法的matlab仿真程序,考虑雨衰 阴影 和多径影响，实现了图像的加水印，去噪，加噪声等功能。- This is a useful frequency estimation algorithm matlab simulation program, Consider shadow rain attenuation and multipath effects Realize image watermarking, de-noising, plus noise and othe