滤波求和方式实现宽带波束形成，表示出两帧图像间各个像素点的相对情况，实现了图像的加水印，去噪，加噪声等功能。- Filtering summation way broadband beamforming, Between two images showing the relative circumstances of each pixel, Realize image watermarking, de-noising, plus noise and other functions.