线性平滑滤波器 实现领域平均法抑制噪声，用了一段代码和两个配图在里面，可以选择任意其中一个来进行matlab实验。实验结果准确-Linear smoothing filter implementation averaging art noise suppression, with a piece of code and two with pictures on the inside, you can choose any one of them to carry out matlab experiment. Experimental results are accurate