Or "Stream carving for content aware image resizing" for short
I woke up and stumbled upon this, i thought this was pretty cool
http://www.youtube.com/watch?v=vIFCV2spKtg
Oh, i found a better version
http://www.faculty.idc.ac.il.nyud.net:8090/arik/IMRet-All.mov
it gets interesting after a minute or so