MATLAB: How to get a uniform circle

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Hi I have the following Image of a circle I want to make its edges uniform can any body help ??

Best Answer

hi,
i tired to write a fast code, try it and see :
 I=imread('dcircle.png'); % that image with deformed circle.
X=rgb2gray(I);
N=size(X);
%  finding an approximation of the center
% you take where you want start counting 
xc=100;
n=0; %  number of black pixels vertically descending 
for y=1:N(2)
    if X(xc,y)>0.70;
        n=n+1;
    end
end
% the center is then given by :
r=n/4;
yc=N(2)/2;
Y=zeros(N(1),N(2));
 for x=1:N(1)
    for y=1:N(2)
        rt=sqrt(((x-xc)^2)+((y-yc)^2));
        if rt>=r
            Y(x,y)=1;
        end
    end
end
figure,subplot(1,2,1), imshow(X),title(' initial');
subplot(1,2,2), imshow(Y), title(' adjusted');
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