The first photo is my friend's room in Austin from this past summer. I chose to rectify the wall- probably the easiest thing to work with in that image. I wasn't sure how to actually place the resulting pixels because I thought that if I were to rectify the wall it should almost swing forward, giving it more width than it originally had. I suppose I was wrong, though, because that didn't seem to work as well- you can see the additional width in the new image.
Input picture
First picture correspondences:
First picture output:
Second picture correspondences:
Output result
I took a couple of my pictures from a few years ago (guess I got lucky because I was hoping to getting around to stitching them myself). The first picture is of Safeco Field in Seattle: