1、n0+step)=before_gray;figure;imshow(uint8(X1);X2(m0:imshow(uint8(X2);得到的图像如下:2.用matlab程序实验空间分辨率变化效果。X=imread(picture1.jpg);imshow(uint8(X);m,n=size(X);X1=X(1:2:m,1:n);imwrite(X1, 得到的图形如下3.用matlab程序实验幅度分辨率变化效果.程序代码如下:clearmm,nn=size(X);for i=1:mm for j=1:nn X128(i,j)=2*(ceil(X(i,j)/2); endend X64(i,j)
2、=4*(ceil(X(i,j)/4);end X32(i,j)=8*(ceil(X(i,j)/8);figuresubplot(2,2,1);title(256级subplot(2,2,2);imshow(uint8(X128);128级subplot(2,2,3);imshow(uint8(X64);64级subplot(2,2,4);imshow(uint8(X32);32级 得到的图像如下作业21.用matlab作出图像的直方图。clear;A = imread(picture2.jpgI = rgb2gray(A);add = ;tab1 = zeros(1,256);for n =
3、0:255; X = I = n; add = add; sum(sum(X);end;a, b = size(I);final = add / (a*b);stem(final, Marker, nonefigure(2);imshow(I);得到的图像如下2.用matlab实现图像的直方图均衡化clear allm=imread(A = rgb2gray(m);m,n=size(A);B=zeros(size(A);l=m*n;r=zeros(1,256);y=zeros(1,256);A=double(A);mfor j=1:n r(A(i,j)+1)=r(A(i,j)+1)+1;r=r
4、./l;for k=1:256ky(k)=y(k)+r(j); y(k)=floor(255*y(k)+0.5);B(i,j)=y(A(i,j)+1);A=uint8(A);B=uint8(B);subplot(2,2,1)imshow(A)原图像)subplot(2,2,2)imhist(A)原图像的直方图subplot(2,2,3)imshow(B)经过均衡处理的图像subplot(2,2,4)imhist(B)经过均衡处理后该图像的直方图作业31.用 matlab实现多幅图像平均去高斯白噪声。A=imread(I=rgb2gray(A);a,b=size(I);noise=randn(a
5、,b)*30;X=double(I)+noise;Y=zeros(a,b);for n=1:30 noise=randn(a,b)*30; X=double(I)+noise; Y=Y+double(X);Y=Y/n;figure(3);imshow(uint8(Y)原图加了高斯白噪声的图像:去噪后的图像:2.用 matlab实现均值滤波去除高斯白噪声.I=double(I)+noise;I2=zeros(a+2,b+2);I3=zeros(a,b);a for m=1:b I2(n+1,m+1)=I(n,m); end;imshow(uint8(I2);for n=2: for m=2:b
6、I3(n-1,m-1)=I2(n-1,m-1)+I2(n-1,m)+I2(n-1,m+1)+I2(n,m-1)+I2(n,m)+I2(n,m+1)+I2(n+1,m-1)+I2(n+1,m)+I2(n+1,m+1)/9;imshow(uint8(I3);加高斯白噪声图像均值滤波去噪后图像3.用 matlab实现中值滤波去除脉冲噪声。figure(1);X=zeros(1:9);Y=zeros(a+2,b+2);Z=zeros(a,b); Y(n+1,m+1)=I(n,m);for n=0:100 Y(round(rand*a),round(rand*b)=0;200 Y(round(rand*a),round(rand*b)=255;figure(2) imshow(uint8(Y);Y=double(Y); X=Y(n-1,m-1),Y(n-1,m),Y(n-1,m+1),Y(n,m-1),Y(n,m),Y(n,m+1),Y(n+1,m-1),Y(n+1,m),Y(n+1,m+10); X=sort(X); Z(n-1,m-1)=X(5);imshow(uint8(I);得到图像如下:加脉冲噪声后图像中值滤波去噪后图像 (注:可编辑下载,若有不当之处,请指正,谢谢!
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