Here's how it works: Connect the device to your index finger and then form a rectangle with your fingers. Your finger rectangle works as a viewfinder for the camera, and photos are taken by pressing on the device firmly with your thumb.
The Ubi-camera has a built-in range sensor that can tell the amount of space between the camera and the photographer's face, and uses that information to create a shot. For instance, when you take a photo with your face close to the camera, you get a wide-angle shot. When you move your fingers further away you can snap a close up. Zooming in on photos is done later on a PC.
Researchers did a brief demo of the camera for DigInfoTV, showing off how the device is able to capture pictures:
The range sensor uses infrared technology, which occasionally has difficulty detecting faces and can be affected by light -- something the developers hope to update in the future.
In its current prototype form the Ubi-camera also needs to be connected to a PC while you take a photo; however, developers hope to make a stand-alone version of the camera in the future that can be used away from a computer screen.