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1、反色functionInverse_Callback(hObject,eventdata,handles)x=imread('*•bmp')y=255-x;直方图均衡HisteQ_Callback(hObject,eventdata,handles)x=imread(、*•bmp')N=256;[row,col]=size(x);p=zeros(N)；fori=l:row*col；p(x(i)+l)=p(x(i)+l)+l；%%%%%%%汁算灰度值为i的个数，类似％%%%%p(i+l)=length(find(x==i))/(m*n);endp=
2、(double(p))/(row*col)；fork=2:Np(k)=p(k)+p(k-l)；ends=fix(256*p)；fori=l:row*col；x(i)=s(x(i)+1)-1;end阈值变换x=imread('*.bmp')prompt={1Threshold(0-255)：1};name=1InputforThresholding1；numlines=l；defaultanswer={'501}；anss=inputdlg(prompt,name,numlines,defaultanswer)；th=str2num(anss{l}
3、)；[row,col]=size(x)；fori=l:row*col;ifx(i)>thx(i)=256;elseX(i)=0;endend全局线性变换..f=imread(、*.bmpz)[row,col]=size(f)；fl=double(f)；prompt={1themingraylevelforoutputimage(0-255):11themaxgraylevelforoutputimage(0-255):'};name=1InputforContraststretching'；numlines=l；defaultanswer={10
4、112551};anss=inputdig(prompt,name,numlines,defaultanswer)；b=str2num(anss{1});a=str2num(anss{2})；fminGray=min(min(f1));fmaxGray=max(max(f1))；g=double(zeros([row,col]))；forx=l:rowfory=l:colg(x,y)=[(a-b)*(f1(x,y)-fminGray)/(fmaxGray-fminGray)]+b；endend分段线性变换...f=imread('*.bmp')[
5、row,col]=size(f);fl=double(f)；N=256;prompt={"thexofthefirstpoint:11theyofthefirstpoint:11thexofthesecondpoint:1'theyofthesecondpoint:11themaximumgraylevelforoutputimage:1};name=1InputforContraststretching1；numlines=l；defaultanswer={'801170111701'180r'255'}；anss=inputdlg(promp
6、t,name,numlines,defaultanswer)；)3})4})xl=str2num(anssyl=str2num(anssx2=str2num(anssy2=str2num(anssgmaxGray=str2num(anss{5})fmaxGray=max(max(f1))；forx=l:rowfory=l:coliff1(x,y)<=xlg(x,y)=x2*f1(x,y)/xl；elseif(f1(x,y)>xl)&(f1(x,y)<=x2)g(x,y)=(y2-yl)*(f1(xzy)-xl)/(x2-xl)+yl;elseg(
7、x,y)=(gmaxGray-y2)*(f1(x,y)-x2)/(fmaxGray-x2);endendendend对数非线性变换...f=imread(、★•bmp')[row,col]=size(f)；mode.WindowStyle=1modal1;mode.Interpreter:1tex1；msgbox(’g(x,y)=a+(In[f(x,y)+1])/(b*ln(c))1,1theformul1,，mode1)；prompt:{1parametera：11parameterb：'1parameterc：1}；name=1Inputfo
8、rLOGtranformation1；numlines=l;defaultanswer={'0'111丨10丨};anss=inputd
