Creating Responsive Websites with Photo Backgrounds
This is a great post if you want to see some examples of great work with responsive full screen image backgrounds, but if you wanted to learn how to do it yourself I suggest you’re better off going to Backstretch and implementing it yourself.
The trend of large photographic backgrounds has become very popular in recent years. The improvement of Internet connections has allowed more data transfer per second, which means images can load a lot quicker in real-time. There are also plenty of open source scripts out there for generating cross-browser support using fixed photo backgrounds.
An excerpt from Creating Responsive Websites with Photo Backgrounds