how to do this in images

I have two images that some part of them are similar. I want a software or a website that automatically puts two of them into one image.
Answer #1
post what you are trying to do. need your example for any one to figure out what you are asking
Answer #2
I’m going with he wants panorama stitching software.
Taking two photos with something in common and stitching them together.
If my guess is right, you can try:
http://hugin.sourceforge.net/download/