matlab学习

1.将一个图片嵌入一张图里，去除黑边

clc
clear
close all
I = imread('qiegray.jpg');
I = rgb2gray(I);
I = double(I);
I1 = imresize(I, 0.3);
I2 = I1
[M,N] = size(I2);
for i = 1:M
    for j = 1:N
        I2(i,j) = -1;
    end
end
I2 = imrotate(I2,60);
%figure, imshow(I2);
I1 = imrotate(I1,60);
[M,N] = size(I1);

for i = 1:M
    for j = 1:N
        if(I2(i,j) == I1(i,j))
        else
            I(i + 30, j + 30) = I1(i,j);
        end
    end
end
figure, imshow(uint8(I));
imwrite(uint8(I),'heli.jpg');