A room full of Macs helped restored the Star Wars trilogy for release on DVD.

Each frame of film needed to be digitized and then digitally restored. The massive job was done by 600 Power Mac G5s.

Lowry Image Mike Inchalik told BBC Click Online: "The Apple G5s were chosen because it's an extraordinary floating point processing machine, and with 1,200 such processors there's a really immense amount of processing capability here."

"One of the beauties of using general purpose computers to do this work is they get faster and faster every year," he added.

Inchalik explains the process of restoring the film: "Each computer works on a different shot from the movie. Instead of trying to identify a piece of dirt from what else is in the frame, the software compares the frames on either side of the frame it's examining.

"It asks: Can I track anything logically from one frame to the next and decide whether this is really a piece of scene content. It could be a fighter, it could be a bird flying across screen, or in fact a one-frame, spurious event that we need to remove."

It took 30 days of work. But the original trilogy is now out on DVD.