Google is making a 3D, life-size video calling booth

Google is working on a video calling booth that uses 3D imagery on a 3D display to create a lifelike image of the people on both sides. While it's still experimental, Project Starline" builds on years of research and acquisitions, and could be the core of a more personal-feeling video meeting in the near future.

The system was only shown via video of unsuspecting participants, who were asked to enter a room with a heavily obscured screen and camera setup. Then the screen lit up with a video feed of a loved one, but in a way none of them expected:

I could feel her and see her, it was like this 3D experience. It was like she was here."

I felt like I could really touch him!"

It really, really felt like she and I were in the same room."

CEO Sundar Pichai explained that this experience" was made possible with high-resolution cameras and custom depth sensors, almost certainly related to these Google research projects into essentially converting videos of people and locations into interactive 3D scenes:

Google's 46-camera light field videos' let you change perspective and peek around corners

This room-sized LED egg captures amazing 3D models of the people inside it

The cameras and sensors - probably a dozen or more hidden around the display - capture the person from multiple angles and figure out their exact shape, creating a live 3D model of them. This model and all the color and lighting information is then (after a lot of compression and processing) sent to the other person's setup, which shows it in convincing 3D. It even tracks their heads and bodies to adjust the image to their perspective. (There's a bit more on an early version of the technique here.)

But 3D TVs have more or less fallen by the wayside; turns out no one wants to wear special glasses for hours at a time, and the quality on glasses-free 3D was generally pretty bad. So what's making this special 3D image?

Pichai said we have developed a breakthrough light field display," probably with the help of the people and IP it scooped up from Lytro, the light field camera company that didn't manage to get its own tech off the ground and dissolved in 2018.

Light field cameras and displays create and show 3D imagery using a variety of techniques that are very difficult to explain or show in 2D. The startup Looking Glass has made several that are extremely arresting to view in person, showing 3D models and photographic scenes that truly look like tiny holograms.

Whether Google's approach is similar or different, the effect appears to be equally impressive, as the participants indicate. They've been testing this internally and are getting ready to send out units to partners in various industries (such as medicine) where the feeling of a person's presence makes a big difference.

At this point Project Starline is still very much a prototype, and probably a ridiculously expensive one - so don't expect to get one in your home any time soon. But it's not wild to think that a consumer version of this light field setup may be available down the line. Google promises to share more later this year.