matlab几何纠正，间接法，双线性内插

超简洁，超级快，两个文件

datapre.m文件代码:

global X;

global Y;

global A;

global l;

global i;

global I;

global m;

global n;

global k;

global dx;

A=[];

l=[];

i=0;

m=[];

n=[];

dx=[];

fig=figure;

subplot(1,2,1);

I=imread('编程实习2-待纠正图像.bmp');

imshow(I);

J=imread('编程实习2-参考图像.bmp');

subplot(1,2,2);

imshow(J);

dcm_obj = datacursormode(fig);

datacursormode on;

set(dcm_obj,'UpdateFcn',@myupdatefcn);

myupdatefcn文件代码：

function txt = myupdatefcn(empt,event_obj)

% Customizes text of data tips

global X;

global Y;

global A;

global l;

global i;

global I;

global m;

global n;

global k;

global dx;

pos = get(event_obj,'Position');

X=pos(1);

Y=pos(2);

txt = {['待纠正图像X: ',num2str(X)],...

     ['待纠正图像Y: ',num2str(Y)]};

i=i+1;

if(rem(i,2)==1)

k=(i+1)/2;

A(k,1)=1;

A(k,2)=X;

A(k,3)=Y;

else

    l(i/2,1)=X;

    l(i/2,2)=Y;

end

[m,n]=size(l);

if(m==4)

    datacursormode off;

    dx=inv(A'*A)*(A'*l);    

    [m,n,k]=size(I); 

dis=sqrt((A(2,2)-A(1,2))*(A(2,2)-A(1,2))+(A(2,3)-A(1,3))*(A(2,3)-A(1,3)));

dist=sqrt((l(2,1)-l(1,1))*(l(2,1)-l(1,1))+(l(2,2)-l(1,2))*(l(2,2)-l(1,2)));

sca=dist/dis;

cosa=(dx(2,1)+dx(3,2))/(2*sca);

sina=(-dx(2,2)+dx(3,1))/(2*sca);

alfa=atan(sina/cosa);

alfa=alfa*180/3.1415926;

ResImage=imresize(I,sca,'bilinear');

ResImage=imrotate(ResImage,alfa,'bilinear');

figure;

imshow(ResImage);

end

end