阿尔法均值滤波

1、图像复原的目的是从观测到的退化图像重建原始图像，它是图像处理、 模式识别、机器视觉等的基础，在天文学、遥感成像、医疗图像等领域获 得了重要应用。代码：I=imread(g.png);m,n=size(I);P=imnoise(I,salt & pepper,0.04);Q=imnoise(I,gaussian,0,0.02);R=imnoise(P,gaussian,0,0.02);%加椒盐噪声的三种情况A=I;%d=0d=0;for i=2:m-1for j=2:n-1img_turn = P(i-1:i+1,j-1:j+1);img_turn = sort(img_turn(:);img_

2、decrese = img_turn(floor(d/2)+1:9-floor(d/2);A(i,j) = sum(img_decrese(:)/(9-d);endendB=I;%d=2d=2;for i=2:m-1for j=2:n-1img_turn = P(i-1:i+1,j-1:j+1);img_turn = sort(img_turn(:);img_decrese = img_turn(floor(d/2)+1:9-floor(d/2);B(i,j) = sum(img_decrese(:)/(9-d);endendC=I;%d=4d=4;for i=2:m-1for j=2:n-1

3、img_turn = P(i-1:i+1,j-1:j+1);img_turn = sort(img_turn(:);img_decrese = img_turn(floor(d/2)+1:9-floor(d/2);C(i,j) = sum(img_decrese(:)/(9-d);end end%加高斯噪声的三种情况D=I;%d=0d=0;for i=2:m-1for j=2:n-1img_turn = Q(i-1:i+1,j-1:j+1);img_turn = sort(img_turn(:);img_decrese = img_turn(floor(d/2)+1:9-floor(d/2);

4、D(i,j) = sum(img_decrese(:)/(9-d);endendE=I;%d=2d=2;for i=2:m-1for j=2:n-1img_turn = Q(i-1:i+1,j-1:j+1);img_turn = sort(img_turn(:);img_decrese = img_turn(floor(d/2)+1:9-floor(d/2);E(i,j) = sum(img_decrese(:)/(9-d);endendF=I;%d=4d=4;for i=2:m-1for j=2:n-1img_turn = Q(i-1:i+1,j-1:j+1);img_turn = sort

5、(img_turn(:);img_decrese = img_turn(floor(d/2)+1:9-floor(d/2);F(i,j) = sum(img_decrese(:)/(9-d);endend%加混合噪声的三种情况G=I;%d=0d=0;for i=2:m-1for j=2:n-1img_turn = R(i-1:i+1,j-1:j+1);img_turn = sort(img_turn(:);img_decrese = img_turn(floor(d/2)+1:9-floor(d/2);G(i,j) = sum(img_decrese(:)/(9-d);endendH=I;%d

6、=2d=2;for i=2:m-1for j=2:n-1 img_turn = R(i-1:i+1,j-1:j+1);img_turn = sort(img_turn(:);img_decrese = img_turn(floor(d/2)+1:9-floor(d/2);E(i,j) = sum(img_decrese(:)/(9-d);endendJ=I;%d=4d=4;for i=2:m-1for j=2:n-1img_turn = R(i-1:i+1,j-1:j+1);img_turn = sort(img_turn(:);img_decrese = img_turn(floor(d/2

7、)+1:9-floor(d/2);J(i,j) = sum(img_decrese(:)/(9-d);endendfigure;imshow(I);title(原图);figure;imshow(P);title(椒盐噪声图);figure;imshow(Q);title(高斯噪声图);figure;imshow(R);title(混合噪声图);figure;imshow(uint8(A);title( d=0 时去椒盐噪声图);figure;imshow(uint8(B);title( d=2 时去椒盐噪声图);figure;imshow(uint8(C);title( d=4 时去椒盐噪声图);figure;imshow(uint8(D);title( d=0 时去高斯噪声图);figure;imshow(uint8(E);title( d=2 时去高斯噪声图);figure;imshow(uint8(F);title( d=4 时去高斯噪声图);figure;imshow(uint8(G);title( d=0 时去混合噪声图);figure;imshow(uint8(H);title( d=2 时去混合噪声图);figure;imshow(uint8(J);title( d=4 时去混合噪声图);效果:原图椒盐噪声图混合噪声图d=0时去椒盐噪