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1、1代数运算：加噪声I=imread('eight.tif');J1=imnoise(I,'gaussian',0,0.02);J2=imnoise(I,'salt&pepper',0.02);J3=imnoise(I,'speckle',0.02);subplot(2,2,1),imshow(I),title('原图像');subplot(2,2,2),imshow(J1),title('加高斯噪声');subplot(2,2,3),imshow(J2),title('加椒盐噪声');subplot(2,2,4),imshow(J3),title('加乘性噪声');代数运算：相加：A=imre
2、ad('rice.png');B=imread('testpat1.png');C=imadd(A,B);subplot(1,3,1),imshow(A);subplot(1,3,2),imshow(B);subplot(1,3,3),imshow(C)A=imread('cameraman.tif');B=A+50;C=A-50;subplot(1,3,1),imshow(A);subplot(1,3,2),imshow(B);subplot(1,3,3),imshow(C)相加去噪声I=imread('rice.png');I1=imnoise(I,'gaussian',0,0.005);
3、%添加高斯噪声I2=imnoise(I,'gaussian',0,0.005);I3=imnoise(I,'gaussian',0,0.005);I4=imnoise(I,'gaussian',0,0.005);K=imlincomb(0.25,I1,0.25,I3,0.25,I4);%线性组合subplot(2,2,1);imshow(I);subplot(2,2,2);imshow(I1);subplot(2,2,3);imshow(K,[]);2几何运算：平移I=imread('cameraman.tif');se=translate(strel(1),[2525]);J=imdilat
4、e(I,se);imshow(I),title('Original')figure,imshow(J),title('Translated');旋转I=imread('rice.png');J=imrotate(I,30,'bilinear');imshow(I);title('原图像')figure,imshow(J),title('旋转后的图像')缩放I=imread('rice.png');J=imresize(I,2,'bilinear');subplot(1,2,1),imshow(J)J1=imresize(I,2,'nearest');subplot(1,2,2),imshow(
5、J1)I=imread('autumn.tif');R=I(:,:,1);G=I(:,:,2);B=I(:,:,3);figure,imhist(R);title('R');figure,imhist(G);title('G');figure,imhist(B);title('B');图像增强：1.点运算I=imread('rice.png');%读取图像subplot(2,2,1),imshow(I)%输出图像title('原始图像')%在原始图像中加标题fori=1:256forj=1:256K(i,j)=log10(double(I(i,j)))*80;endendJ=uint8(K);
6、subplot(2,2,3),imshow(J);title('线性变换图象');I=imread('pout.tif');imshow(I);J=imadjust(I,[0.30.7],[01],1); %transformsthewaluesinthe%intensityimageItovaluesinJbylinealymapping%valuesbetween0.3and0.7tovaluesbetween0and1.figure;imshow(J);RGB1=imread('football.jpg');RGB2=imadjust(RGB1,[.2.30;.6.71],[]);su
7、bplot(2,1,1);imshow(RGB1),subplot(2,1,2);imshow(RGB2)显示直方图1.clearall;closeall;I=imread('pout.tif');figure;subplot(121);imshow(uint8(I));subplot(122);imhist(I);2.clearall;closeall;I=imread('onion.png')
