%图像拼接
I1=imread('lena.jfif');
I2=imread('rice.jfif');
I1=rgb2gray(I1);
I2=rgb2gray(I2);
[m1,n1]=size(I1);
I=zeros(size(I1));
I(1:m1,1:n1/2)=I1(1:m1,1:n1/2);
I(1:m1,n1/2:n1)=I2(1:m1,n1/2:n1);
subplot(221)
imshow(uint8(I1));
subplot(222)
imshow(uint8(I2));
subplot(223)
imshow(uint8(I));