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I0=imread('D:\matlab\work\image\D.bmp'); 
 
figure,imshow(I0); 
I00=im2bw(I0); 
I=edge(I00,'canny'); 
[Y,T]=immatrix(I); 
T 
 
I1=imresize(I,1.2); 
figure,imshow(I1); 
I11=im2bw(I1); 
I3=edge(I11,'canny'); 
[Y T3]=immatrix(I3,1.2); 
T3 
%if (abs(T3-T)<0.001) 
  %disp('七个不变矩匹配'); 
  figure,imshow(Y); 
  %end 
 
I2=imread('D:\matlab\work\image\D3.bmp'); 
t=48/36; 
figure,imshow(I2); 
I22=im2bw(I2); 
I4=edge(I22,'canny') 
[Y,T4]=immatrix(I4,t); 
T4 
%if (abs(T4-T)<0.00001) 
  %disp('七个不变矩匹配'); 
  figure,imshow(Y); 
  %end