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% L
L=imread('lena.tif');
L=L(:,:,1);
imshow(L);
L=double(L)./255;
[N M z]=size(L);
% n m
n=15; m=n;
n1=fix(n/2); m1=n1;
a=L(1,1);b=L(1,M);c=L(N,1);d=L(N,M);
for i=1:n1;
for j=1:m1;
L1(i,j)=a; L3(i,j)=b; L6(i,j)=c; L8(i,j)=d;
end;
end;
L2=L(1,1:M); L02=L2;
for i=1:n1-1;
L2=[L2;L02];
end;
L7=L(N,1:M); L07=L7;
for i=1:n1-1;
L7=[L7;L07];
end;
L4=L(1:N,1); L4=L4'; L04=L4;
for i=1:m1-1;
L4=[L4;L04];
end;
L4=L4';
L5=L(1:N,M); L5=L5'; L05=L5;
for i=1:m1-1;
L5=[L5;L05];
end;
L5=L5';
L1=[L1;L4]; L1=[L1;L6]; L1=L1';
L2=[L2;L]; L2=[L2;L7]; L2=L2';
L3=[L3;L5]; L3=[L3;L8]; L3=L3';
L1=[L1;L2]; L1=[L1;L3];
Lr=L1';
F=ones(n,m);
Lser=filter2(F,Lr,'same')/(n*m);
C=abs(Lr-Lser)./(Lr+Lser+eps);
% alfa
lfa=.55;
C=C.^.alfa;
for i=1+n1:N+n1;
disp(i)
for j=1+m1:M+m1;
if j==1+m1;
D=0;
for a=-n1:n1;
for b=-m1:m1;
D(n1+1+a,m1+1+b)=Lr(i+a,j+b);
end;
end;
end;
if j>1+m1;
for a=-n1:n1;
D(n1+1+a,m+1)=Lr(i+a,j+m1);
end;
D=D(1:n,2:m+1);
end;
if Lr(i,j)>=Lser(i,j);
Lvyh(i,j)=Lser(i,j)*(1+C(i,j))/(1-C(i,j)+eps);
else
Lvyh(i,j)=Lser(i,j)*(1-C(i,j))/(1+C(i,j));
end;
end;
end;
figure, imshow(Lvyh);

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: 2015-10-01; !; : 672 |


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