Transferring files between different devices has been made much simpler through the use of the cloud and cloud services like Dropbox or Google Drive. Instead of needing a cable or WiFi access to get files off or on to a device, you can instead save them to a cloud service and have them available everywhere.Not everyone wants to or can use such services, though, and what if you have a file you want to share with a specific group of people? Fujitsu believes it has an answer to this problem, and has figured out a way to transfer files using a camera.Fujitsu has created a piece of software that can be installed on a PC that both monitors the content being displayed as well as collecting information that identifies the PC, such as its IP address. That information is then converted into microscopic light signals the human eye can’t see, which are projected on to the screen.A mobile device also running Fujitsu’s software can then use its camera to look at the PC display and read that superimposed signal. In so doing, a secure communication link can be automatically established and data transferred between the two devices.Fujitsu says the file transfer system will work regardless of what is being shown on a display. For example, you could capture an image with your phone, point your camera at your PC’s display, and the image appears on your PC a few seconds later. Or, you could have a Powerpoint presentation open on your PC, point your smartphone camera at the screen, and the presentation gets transferred to your phone.The only limiting factors are that the device must have a camera and must be able to run Fujitsu’s software. As most gadgets now come with a camera, Fujitsu just has to work on shipping the software to all the popular mobile platforms. The system also works with most displays, including projectors.Where this technology comes into its own is when trying to share information quickly with large groups of people. For example, imagine you are giving a talk to a room full of people and want to share your slides with them. Rather than giving them a URL to visit, you could instead just tell them to point their phone/tablet at the projection of the slides at any point during your talk to download them. There’s also going to be uses for this in advertising, and the tech seems to be an extension of the invisible video watermarks we heard about last year, which are meant to work a lot like QR codes.Fujitsu will now continue to work on the technology in a bid to speed up the transfer of files before commercializing it in 2014.There’s sure to be a security issue with such a system as the handshake between the two devices seems to be automatic. So someone could transfer a malicious file to a PC from their phone without ever physically interacting with the machine. But Fujitsu will surely implement some safety measures allowing a user to controls if and when file transfers happen.More at Fujitsu including a video of the system in action.