Boston: Videos are a great medium for audio-visual experiences but interacting with characters and objects behind the screen has been a fantasy—until now.
Going a step beyond augmented reality, they have recently done just that, developing an imaging technique called Interactive Dynamic Video (IDV) that lets you reach in and “touch” objects in videos. Using traditional cameras and algorithms, IDV looks at the tiny, almost invisible vibrations of an object to create video simulations that users can virtually interact with.
Davis says that IDV has many possible uses, from filmmakers producing new kinds of visual effects to architects determining if buildings are structurally sound. For example, he shows that, in contrast to how the popular Pokemon Go app can drop virtual characters into real-world environments, IDV can go a step beyond that by actually enabling virtual objects (including Pokemon) to interact with their environments in specific, realistic ways, like bouncing off the leaves of a nearby bush.
The most common way to simulate objects’ motions is by building a 3-D model. Unfortunately, 3-D modeling is expensive, and can be almost impossible for many objects. While algorithms exist to track motions in video and magnify them, there aren’t ones that can reliably simulate objects in unknown environments. Davis’ work shows that even five seconds of video can have enough information to create realistic simulations.
To simulate the objects, the team analyzed video clips to find “vibration modes” at different frequencies that each represent distinct ways that an object can move. By identifying these modes’ shapes, the researchers can begin to predict how these objects will move in new situations.
It can also improve AR/VR games, like Pokémon Go. And yes, someday it could be adapted to work with Pokémon Go too.