CMOS cameras have recently become inexpensive for hobbyists and clean interfaces have been developed for them. This project uses an ATmega16 microcontroller to capture and output data from the camera. The complete report write up and source code is available for download so take a look!
PyroFactor: 
March 5th, 2008 at 7:39 pm
sir i am interest in this project please replay me complete information
thanks
March 5th, 2008 at 10:38 pm
All the project details are laid out nicely in the article.
link from above: http://www.robozes.com/inaki/dproject/