image - Understanding this code to generate a watermark logo for an image

Question

% imgew: watermark image  
% imge1: Orginal imge  

function W=dmg(imgew,imge1);      
% obtain original and watermark image

[w h]=size(imgew');  
[w1 h1]=size(imge1');  
a=1;  
b=1;  
W=zeros(size(imge1'));  

for i=1:w:w1  
for j=1:h:h1  
    W(i:a*w,j:b*h)=imgew';  
    b=b+1;  
end  
a=a+1;  
b=1;  
end  

W=W';

Answer 1

嵌套循环只是计算“imgew”图像的马赛克“W”。请注意，“W”的大小将等于或大于“imge1”。