Movie industry boffins have come up with another weapon in the war against people who sneak video cameras into cinemas and make crappy copies of blockbuster movies to sell at car boot sales.
Video watermarking has been around for a while now but this technology can only reveal in which cinema a recording was made. The latest invention goes one step further and can tell investgators exactly which seat the cammer was sitting in to an accuracy of 44cm.
It's only a matter of time before cinema owners are forced by the big studios to start taking night vision snaps of movie-going audiences before every screening.
We dread to think what else they might catch going on in the dark.