資源描述：
《楊宇明《數(shù)字圖像處理》《數(shù)字圖像處理》書中代碼》由會員上傳分享，免費在線閱讀，更多相關內(nèi)容在工程資料-天天文庫。
1、例1-1m=uint8(zeros(128,128丄27));fori=l:27[m(:，:/:/i),map]=imread('mri.t訐：i);endmontage(m,map)例2-1a=imread('cameraman.tif);figure(l);imshow(a);bl=a+5O;figure(2);imshow(bl);b2=1.2*a;figure(3);imshow(b2)b3=0.65*a;%讀入cameraman圖像%bl=a+45圖像灰度值增加45%b=1.2*a圖像對比度增大%b=0.65*a圖像對比度減少figure(4);imsho
2、w(b3);b4=-double(a)+255;%b4=-l*a+255,圖像求補，注意把a的類型轉換為doublefigure(5);imshow(uint8(b4));%再把double類型轉換為unit8例2-2%讀入lena圖像a=imread('cameraman.tif')；%讀取原始圖像figure(l);imshow(a);%顯示原始圖像xlabel('(a)原始圖像')；%顯示函數(shù)J(x)的曲線圖x=l:255;y=x+x.*(255-x)/255;figure(2);plot(x,y);xlabel('(b)函數(shù)J(x)的曲線圖')；bl=dou
3、ble(a)+0.006*double(a).*(255-double(a));figure⑶;imshow(uint8(bl));%顯示非線性處理圖像xlabel('(c)非線性處理效果')；例2-3clear;%%讀入圖像a=imread('cameraman/df);imhist(a);title(源始cameraman圖像的直方圖');%%b=f(a)bl=1.25*double(a)+45;figure(2);imhist(uint8(bl));title('變換后的直方圖J;例2-4clear;histgram=zeros(l,256);%生成直方圖數(shù)組
4、cdf=zeros(l,256);[cm,map]=imread(,cameraman.t訐)；[a,b]=size(cm);fori=l:aforj=l:bk=cm(i,j);histgram(k)=histgram(k)+l;endend%得到直方圖cdf(l)=histgram(l);fori=2:256cdf(i)=cdf(i-l)+histgram(i);endfori=l:a%點運算fori=l:bk=cm(i,j);cm_equ(ij)=cdf(k)*25^(a*b);endendimshow(uint8(cm_equ));figure(2);imhi
5、st(uint8(cm_equ));例2-5l=imread('tire.tif')；J=histeq(l);H=adapthisteq(l);figure⑴,imshow(l);xlabelf原始圖像')；figure(2),imshow(J);xlabelfhisteq均衡化');figure(3),imshow(H);xlabelfadapthisteq均衡化')；例2-6a=imread('hill.jpg');s=size(a);b=double(a);c(:/:/l)=b(:/:/l)+b(:,:/2)；c(:,:,2)=b(:,:,2);c(:,:,3
6、)=b(:,:,3)?b(:,:,2);fori=l:s(l)forj=l:s(2)fork=l:s(3)ifc(i,j,k)vOc(i,j,k)=O;endifc(ijk)>255c(ij,k)=255;endendendendc=uint8(c);subplot(121);imshow(a);xlabel('原始圖像')；subplot(122);imshow(c);xlabel('新圖像');例2-7a=imread('eight.tif,);al=imnoise(a,'gaussian',0,0.006);%對原始圖像加高斯噪聲，共得到4幅圖像a2=imno
7、ise(a,'gaussian',0,0.006);a3=imnoise(a,'gaussian',0,0.006);a4=imnoise(a,'gaussian'z0,0.006);k=imlincomb(0.25,al,0.25,a2,0.25,a3,0.25,a4);%線性組合subplot(131);imshow(a);subplot(132);imshow(al);subplot(133);imshow(k,[]);例2-8clear;a=imread('rice.png');%讀取圖像figure(l);imshow(a);%顯示原始圖像backgr
