MIT’s New AI Can Sense Your Movements Through Walls Using Radio Signals

Jason Dorfman, MIT CSAIL
Jason Dorfman, MIT CSAIL

New artificial intelligence technology developed at MIT can see through walls, and it knows what you’re doing.

RF-Pose, created by researchers at the Computer Science and Artificial Intelligence Laboratory (CSAIL), uses wireless signals to estimate a person’s pose through a wall. It can only come up with a 2D stick figure of your movements, but it can nonetheless see your actions.

The system, described in a new paper [PDF], uses a neural network to piece together radio signals bouncing off the human body. It takes advantage of the fact that the body reflects radio frequency signals in the Wi-Fi range. These Wi-Fi signals can move through walls, but not through people.

Using data from low-power radio signals—1000 times lower than the power your home Wi-Fi router puts out—this algorithm can generate a relatively accurate picture of what the person behind the wall is doing by piecing together the signals reflected by the moving body.

The system can recognize movement in poor lighting and identify multiple different individuals in a scene. Though the technology is still in development, it’s not hard to imagine that the military might use it in surveillance, but the researchers also suggest that it may be useful for video game design and search-and-rescue missions. It might also help doctors monitor and analyze the movements of patients with disorders like Parkinson’s disease and multiple sclerosis.

This is just the latest in a series of projects using radio signals to mimic X-ray vision. CSAIL has been working on similar technology using Wi-Fi signals for several years, creating algorithms to recognize human forms and see motion through obstructions. In the future, they hope to expand the system to be able to recognize movement with 3D images rather than the current 2D stick figures.

Celebrate the Holidays With the 2020 Harry Potter Funko Pop Advent Calendar

Funko
Funko

Though the main book series and movie franchise are long over, the Wizarding World of Harry Potter remains in the spotlight as one of the most popular properties in pop-culture. The folks at Funko definitely know this, and every year the company releases a new Advent calendar based on the popular series so fans can count down to the holidays with their favorite characters.

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Right now, you can pre-order the 2020 edition of Funko's popular Harry Potter Advent calendar, and if you do it through Amazon, you'll even get it on sale for 33 percent off, bringing the price down from $60 to just $40.

Funko Pop!/Amazon

Over the course of the holiday season, the Advent calendar allows you to count down the days until Christmas, starting on December 1, by opening one of the tiny, numbered doors on the appropriate day. Each door is filled with a surprise Pocket Pop! figurine—but outside of the trio of Harry, Hermione, and Ron, the company isn't revealing who you'll be getting just yet.

Calendars will start shipping on October 15, but if you want a head start, go to Amazon to pre-order yours at a discount.

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What Movie Do You Want to Watch? This Website Analyzes Film Critic Reviews to Help You Choose

She's smiling because it only took her two minutes to choose a movie.
She's smiling because it only took her two minutes to choose a movie.
Rowan Jordan/iStock via Getty Images

Much like sommeliers can detect subtle notes of who-knows-what in a sip of wine, film critics are fantastic at identifying influences and drawing parallels between movies. Cinetrii is a handy website that crowdsources all that movie knowledge to help you find your next favorite film.

Basically, you enter the name of a movie you enjoyed in the search bar, and the site will show you a node graph with film recommendations splintering off the search query. Click on one, and you’ll see a quote from a critic (or critics) who referenced the films together. This way, you get a list of recommendations based on different aspects of the movie, and you get to decide for yourself what you’d like to see more of.

If, for example, you were blown away by the special effects in Christopher Nolan’s Inception, you might like Doctor Strange; according to Variety, it boasts “a staggering visual effects innovation, in which the building-bending seen in Christopher Nolan’s Inception is taken to an extreme that would blow even M.C. Escher’s mind.” If what the Chicago Tribune calls an “elegant brain-bender” quality appealed to you more, The Matrix might be a perfect fit.

Films above your search query were released before the movie you typed in, while films below came out after it. The shorter the line, the more closely the films are related, as calculated by the website’s algorithm. And, as Lifehacker points out, that algorithm doesn’t give any special treatment to massive Hollywood blockbusters, so Cinetrii is an especially great way to find hidden gems. Because it shows you the critics' actual quotes, you’re not left to wonder why a certain film landed on the recommendations list—which can’t always be said for “Watch next” lists on streaming services.

You can explore Cinetrii here.

[h/t Lifehacker]