实现了图像的加水印，去噪，加噪声等功能，包含位置式PID算法、积分分离式PID，意信号卷积的运算,并且绘制图象。- Realize image watermarking, de-noising, plus noise and other functions, It contains positional PID algorithm, integral separate PID, Convolution operation is intended to signal and image rendering.