包括邓氏关联度、绝对关联度、斜率关联度、改进绝对关联度,关于超声波倒车雷达测距的，实现了图像的加水印，去噪，加噪声等功能。- Including Deng s correlation, absolute correlation, correlation of slope, improved absolute correlation, About ultrasonic parking radar ranging, Realize image watermarking, de-noising, pl