利用最小二乘算法实现对三维平面的拟合，阵列信号处理的高分辨率估计，实现了图像的加水印，去噪，加噪声等功能。- Least-squares algorithm to fit a three-dimensional plane, High-resolution array signal processing estimates, Realize image watermarking, de-noising, plus noise and other functions.