QR.zip_QR码_QR码MATLAB_matlab条码提取_qr_二维码

I1=imread('1111.bmp'); I=imresize(I1,[800,800]); J=I; %待剪切图像 [m,n]=size(I); %分块 x=0;y=0; for j=40:-1:1 if n/j-fix(n/j)==0 x=n/j; break; end end for i=40:-1:1 if m/i-fix(m/i)==0 y=m/i; break; end end K=zeros(y,x); for i=1:1:y for j=1:1:x histgram1=zeros(1,256); for i1=1:1:m/y for j1=1:1:n/x k=I((m/y)*(i-1)+i1,(n/x)*(j-1)+j1); histgram1(k+1)=histgram1(k+1)+1; end end %求对比度 T1=0; while(1) sum_low=0;sum_high=0; for i3=0:T1 sum_low=sum_low+histgram1(i3+1); end for i4=T1+1:255 sum_high=sum_high+histgram1(i4+1); end if sum_low>=sum_high break; else T1=T1+1; if T1==255 break; end end end temp1=0;temp2=0;temp3=0;temp4=0; for i2=0:T1-1 temp1=temp1+i2*histgram1(i2+1); temp2=temp2+histgram1(i2+1); end dark=temp1/temp2; for i2=T1:255 temp3=temp3+i2*histgram1(i2+1); temp4=temp4+histgram1(i2+1); end bright=temp3/temp4; T=bright-dark; if T<20 I((m/y)*(i-1)+1:m/y*i,(n/x)*(j-1)+1:n/x*j)=0; else %方向性检测 temp_0=[5 5 5 -3 0 -3 -3 -3 -3]; temp_45=[-3 5 5 -3 0 5 -3 -3 -3]; temp_90=[-3 -3 5 -3 0 5 -3 -3 5]; temp_135=[-3 -3 -3 -3 0 5 -3 5 5]; n_0=0;n_45=0;n_90=0;n_135=0; for i1=2:m/y-1 for j1=2:n/x-1 I_temp_0=abs(double(I((m/y)*(i-1)+i1-1,(n/x)*(j-1)+j1-1))*temp_0(1)+double(I((m/y)*(i-1)+i1-1,(n/x)*(j-1)+j1))*temp_0(2)+... double(I((m/y)*(i-1)+i1-1,(n/x)*(j-1)+j1+1))*temp_0(3)+double(I((m/y)*(i-1)+i1,(n/x)*(j-1)+j1-1))*temp_0(4)+... double(I((m/y)*(i-1)+i1,(n/x)*(j-1)+j1))*temp_0(5)+double(I((m/y)*(i-1)+i1,(n/x)*(j-1)+j1+1))*temp_0(6)+... double(I((m/y)*(i-1)+i1+1,(n/x)*(j-1)+j1-1))*temp_0(7)+double(I((m/y)*(i-1)+i1+1,(n/x)*(j-1)+j1))*temp_0(8)+... double(I((m/y)*(i-1)+i1+1,(n/x)*(j-1)+j1+1))*temp_0(9))/8; I_temp_45=abs(double(I((m/y)*(i-1)+i1-1,(n/x)*(j-1)+j1-1))*temp_45(1)+double(I((m/y)*(i-1)+i1-1,(n/x)*(j-1)+j1))*temp_45(2)+... double(I((m/y)*(i-1)+i1-1,(n/x)*(j-1)+j1+1))*temp_45(3)+double(I((m/y)*(i-1)+i1,(n/x)*(j-1)+j1-1))*temp_45(4)+... double(I((m/y)*(i-1)+i1,(n/x)*(j-1)+j1))*temp_45(5)+double(I((m/y)*(i-1)+i1,(n/x)*(j-1)+j1+1))*temp_45(6)+... double(I((m/y)*(i-1)+i1+1,(n/x)*(j-1)+j1-1))*temp_45(7)+double(I((m/y)*(i-1)+i1+1,(n/x)*(j-1)+j1))*temp_45(8)+... double(I((m/y)*(i-1)+i1+1,(n/x)*(j-1)+j1+1))*temp_45(9))/8; I_temp_90=abs(double(I((m/y)*(i-1)+i1-1,(n/x)*(j-1)+j1-1))*temp_90(1)+double(I((m/y)*(i-1)+i1-1,(n/x)*(j-1)+j1))*temp_90(2)+... double(I((m/y)*(i-1)+i1-1,(n/x)*(j-1)+j1+1))*temp_90(3)+double(I((m/y)*(i-1)+i1,(n/x)*(j-1)+j1-1))*temp_90(4)+... double(I((m/y)*(i-1)+i1,(n/x)*(j-1)+j1))*temp_90(5)+double(I((m/y)*(i-1)+i1,(n/x)*(j-1)+j1+1))*temp_90(6)+... double(I((m/y)*(i-1)+i1+1,(n/x)*(j-1)+j1-1))*temp_90(7)+double(I((m/y)*(i-1)+i1+1,(n/x)*(j-1)+j1))*temp_90(8)+... double(I((m/y)*(i-1)+i1+1,(n/x)*(j-1)+j1+1))*temp_90(9))/8; I_temp_135=abs(double(I((m/y)*(i-1)+i1-1,(n/x)*(j-1)+j1-1))*temp_135(1)+double(I((m/y)*(i-1)+i1-1,(n/x)*(j-1)+j1))*temp_135(2)+... double(I((m/y)*(i-1)+i1-1,(n/x)*(j-1)+j1+1))*temp_135(3)+double(I((m/y)*(i-1)+i1,(n/x)*(j-1)+j1-1))*temp_135(4)+... double(I((m/y)*(i-1)+i1,(n/x)*(j-1)+j1))*temp_135(5)+double(I((m/y)*(i-1)+i1,(n/x)*(j-1)+j1+1))*temp_135(6)+... double(I((m/y)*(i-1)+i1+1,(n/x)*(j-1)+j1-1))*temp_135(7)+double(I((m/y)*(i-1)+i1+1,(n/x)*(j-1)+j1))*temp_135(8)+... double(I((m/y)*(i-1)+i1+1,(n/x)*(j-1)+j1+1))*temp_135(9))/8; average_I=(double(I((m/y)*(i-1)+i1-1,(n/x)*(j-1)+j1-1))+double(I((m/y)*(i-1)+i1-1,(n/x)*(j-1)+j1))+... double(I((m/y)*(i-1)+i1-1,(n/x)*(j-1)+j1+1))+double(I((m/y)*(i-1)+i1,(n/x)*(j-1)+j1-1))+... double(I((m/y)*(i-1)+i1,(n/x)*(j-1)+j1))+double(I((m/y)*(i-1)+i1,(n/x)*(j-1)+j1+1))+... double(I((m/y)*(i-1)+i1+1,(n/x)*(j-1)+j1-1))+double(I((m/y)*(i-1)+i1+1,(n/x)*(j-1)+j1))+... double(I((m/y)*(i-1)+i1+1,(n/x)*(j-1)+j1+1)))/9; if I_temp_0>average_I n_0=n_0+1; end if I_temp_45>average_I n_45=n_45+1; end if I_temp_90>average_I n_90=n_90+1; end if I_temp_135>average_I n_135=n_135+1; end end end max_n=n_0; if n_45>max_n max_n=n_45; end if n_90>max_n max_n=n_90; end if n_135>max_n max_n=n_135; end if max_n<40 I((m/y)*(i-1)+1:m/y*i,(n/x)*(j-1)+1:n/x*j)=0; else K(i,j)=255; I((m/y)*(i-1)+1:m/y*i,(n/x)*(j-1)+1:n/x*j)=I((m/y)*(i-1)+1:m/y*i,(n/x)*(j-1)+1:n/x*j)+1; end end end end figure(1) imshow(I) [L,num]=bwlabel(K,4); count=zeros(1,num); for i=1:y for j=1:x for k1=1:num if L(i,j)==k1 count(k1)=count(k1)+1; end end end end max_num=find(count==max(count)); for i=1:y for j=1:x if L(i,j)~=max_num I((m/y)*(i-1)+1:m/y*i,(n/x)*(j-1)+1:n/x*j)=0; end end end y_low=0; for i=1:y for j=1:x-1 if L(i,j)==max_num&&L(i,j+1)==max_num y_low=m/y*(i-1)+1; break; end end if y_low~=0 break; end end y_high=0; for i=y:-1:1 for j=x-1:-1:1 if L(i,j)==max_num&&L(i,j+1)==max_num y_high=m/y*(i-1)+m/y; break; end end if y_high~=0 break; end end x_low=0; for j=1:x for i=1:y-1 if L(i,j)==max_num&&L(i+1,j)==max_num x_low=n/x*(j-1)+1; break; end end if x_low~=0 break; end end x_high=0; for j=x:-1:1 for i=y-1:-1:1 if L(i,j)==max_num&&L(i+1,j)==max_num x_high=n/x*(j-1)+n/x; break; end end if x_high~=0 break; end end if y_low-50>0 y_low=y_low-50; else y_low=1; end if y_high+50<=m y_high=y_high+50; else y_high=m; end if x_low-20>0 x_low=x_low-20; else x_low=1; end if x_high+50<=n x_high=x_high+50; else x_high=n; end for i=1:m for j=1:n if i<=y_low||i>y_high||j<=x_low||j>x_high J(i,j)=0; end end end %Y=zeros(y_high+20-(y_low-20),(x_high+20)-(y_low-20)); Y=J(y_low+1:y_high-1,x_low+1:x_high); %剪切图像 Y_temp=Y;%待校正提取图像 figure(2) imshow(Y_temp) [m1 n1]=size(Y); Y_edge=edge(Y,'log'); figure(3) imshow(Y_edge) se=strel('disk',3); P=imdilate(Y_edge,se); figure(4) imshow(P) clear L num count; [L num]=bwlabel(P); count=zeros(1,