自适应局部降噪滤波器.

自适应局部降噪滤波器

在MA TLAB中输入程序如下：

block=3;

I=imread('VLSI.PNG');

I=rgb2gray(I);

subplot(1,2,1);

imshow(I);

[M,N]=size(I);

NI=zeros(M,N);

temp=[];

for k=1:M

temp=[temp I(k,:)];

end

Eta_total=var(temp);

for k=(block+1)/2:M-(block-1)/2

for l=(block+1)/2:N-(block-1)/2

temp=[];

for m=1:block

temp=[temp I(k+m-(block+1)/2,(l-(block-1)/2):(l+(block-1)/2))];

end

local_mean=mean(temp);

local_var=var(temp);

if local_var==0

NI(k,l)=I(k,l);

else

NI(k,l)=I(k,l)-Eta_total/local_var*(I(k,l)-local_mean);

end

end

end

NI=uint8(NI);

subplot(1,2,2);

imshow(NI);

运行结果：