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实现了两幅指纹图像的拼接

已有 1685 次阅读2007-3-12 01:45 |个人分类:小小程序

% clear all;
% tic
% I=imread('finger.jpg');
% I=I(:,:,1);
% % I1=im2double(I(1:128,1:128));
% % I2=im2double(I(31:158,31:158));
% I1=I(1:128,1:128);
% I2=I(51:178,51:178);
% F1=fft2(I1);
% F2=fft2(I2);
% F2=conj(F2);
% F=ifft2(F1.*F2/norm(F1.*F2));
% F=abs(F);
% F_max=max(max(F));
% [m,n]=find(F==F_max)
% figure,mesh(1:128,1:128,abs(F))
% toc

clear all;
tic
I1=imread('fingerprint1.bmp');
I2=imread('fingerprint2.bmp');
I3=I1(131:258,151:278);
I4=I2(134:261,201:328);
F1=fft2(I3);
F2=fft2(I4);
F2=conj(F2);
F=ifft2(F1.*F2/norm(F1.*F2));
F=abs(F);
F_max=max(max(F));
[m,n]=find(F==F_max)
% figure,mesh(abs(F))

[Height,Width]=size(I3);
mos_Height=Height+m-1;
mos_Width=Width+n-1;

A=uint8(255*ones(mos_Height,mos_Width));

for i=1:mos_Height
    if i<m
        for j=1:Width
            A(i,j)=I3(i,j);
        end
    elseif i>m-1&i<Height+1
        for j=1:mos_Width
            if j<n
                A(i,j)=I3(i,j);
            else
                A(i,j)=I4(i-m+1,j-n+1);
            end
        end
    else
        for j=n:mos_Width
            A(i,j)=I4(i-m+1,j-n+1);
        end
    end
end
imshow(A)

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