Rendering Synthetic Objects into Legacy Photographs

An interesting paper of SIGGRAPH ASIA 2011.
Rendering Synthetic Objects into Legacy Photographs
Kevin Karsch, Varsha Hedau, David Forsyth, Derek Hoiem
To be presented at SIGGRAPH Asia 2011

A method to realistically insert synthetic objects into existing photographs without requiring access to the scene or any additional scene measurements.

Link : http://kevinkarsch.com/publications/sa11.html