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1、图像反转程序:I=imread(pout.tif);JJ=imadjust(I,O1,10);imshow(JJ,);figure;imshow(I,);对数变换程序:I=imread(pout.tif);imshow(I);Image=log(1+double(I);figure(2),imshow(I,)伽马变换程序：A=imread(pout.tif);x=0:255;a=90,b=1.5,c=0.008;B=b.入(c.*(double(A)-a)-1；y=b.入(c.*(x-a)-1；subplot(2,2,1)imshow(A)subplot(2,2,2)imhist(A)subp
2、lot(2,2,3)imshow(B)subplot(2,2,4)imhist(B)figure,plot(x,分段线性变换程序:b=imread(pout.tif)；f0=0;g0=0;fl=10;gl=30;f2=220;g2=180;f3=255;g3=255;figure,plot(f0,f1,f2,f3,gO,gl,g2,g3rl=(gl-gO)/(f1-f0);bl=-rl*fO+gO;r2=(g2-gl)/(f2-fl);b2=-r2*f1+gl;r3=(g3-g2)/(f3-f2);b3=-r3*f2+g2;axis(02550255);m,n=size(b);h=double
3、(b);figure,imshow(mat2gray(h);fori=l:mforj=l:nt=h(i,j);g(i,j)=0;if(t=fO)&)g(i,j)=rl*t+bl;elseif(t=f1)&(t=f2)&(t=a&di=c&di=d&dib);di2=di;di2(n1)=(di(n1)-a)*(c1-a1)/(c-a)+a1;di2(n2)=(di(n2)-c)*(d1-c1)/(d-c)+c1;di2(n3)=(di(n3)-d)*(b1-d1)/(b-d)+d1;i2=uint8(di2);subplot(221),imshow(i);subplot(222),imshow
4、(i2);subplot(223),imhist(i);subplot(224),imhist(i2);f=imread(cameraman.tif);%读入图像，自己改个图像，不要雷同啊M,N=size(f);g=zeros(M,N);fori=1:Mforj=1:Niff(i,j)=f(80,80)%f(80,80)可以改为某个介于【0,255】g(i,j)=4*f(i,j)；%g(x,y)=K*f(i,j)+b!K,B值可以取合理任意值elseiff(i,j)=f(200,200)%f(200,200)可以改为某个介于【0,255】g(i,j)=5*f(i,j)+2；%同上elseiff(i,j)=f(M,N)%f(M,N)可以改为某个介于【0,255】g(i,j)=-1*f(i,j)+2；%同上endendendh=mat2gray(g);imshow(h);
matlab完成分段函数的灰度变换
