×

Announcing: Slashdot Deals - Explore geek apps, games, gadgets and more. (what is this?)

Thank you!

We are sorry to see you leave - Beta is different and we value the time you took to try it out. Before you decide to go, please take a look at some value-adds for Beta and learn more about it. Thank you for reading Slashdot, and for making the site better!

Gesture Recognition Without Batteries

Soulskill posted about 10 months ago | from the how-talking-with-your-hands-becomes-untenable dept.

Input Devices 22

An anonymous reader sends this news from the University of Washington: "[C]omputer scientists have built a low-cost gesture recognition system that runs without batteries and lets users control their electronic devices hidden from sight with simple hand movements. The prototype, called 'AllSee,' uses existing TV signals as both a power source and the means for detecting a user's gesture command (PDF). 'This is the first gesture recognition system that can be implemented for less than a dollar and doesn't require a battery,' said Shyam Gollakota, a UW assistant professor of computer science and engineering. 'You can leverage TV signals both as a source of power and as a source of gesture recognition.' The researchers built a small sensor that can be placed on an electronic device such as a smartphone. The sensor uses an ultra-low-power receiver to extract and classify gesture information from wireless transmissions around us. When a person gestures with the hand, it changes the amplitude of the wireless signals in the air. The AllSee sensors then recognize unique amplitude changes created by specific gestures."

Sorry! There are no comments related to the filter you selected.

Prior art (4, Funny)

pushing-robot (1037830) | about 10 months ago | (#46376947)

As someone who used to own a TV with rabbit ears, I claim prior art on the use of strange gestures and body positions to control devices.

Re:Prior art (1)

jimmydevice (699057) | about 10 months ago | (#46377835)

Don't move

Re:Prior art (2, Interesting)

Anonymous Coward | about 10 months ago | (#46378321)

In the ancient days of my youth I connected a short wire to the grid of of a simple vacuum tube and monitored the plate current on a meter. As I moved around the room the meter current fluctuated. This illustrates just how sensitive electronics are.

Re:Prior art (0)

Anonymous Coward | about 10 months ago | (#46380845)

I think you make a good point. When I walk or run my hands may move back and forth. When I talk I may make hand gestures. When I wash my hands this thing may somehow think I'm adjusting the volume. What about when the guy sitting next to me adjusts the volume on his device, is this thing going to get confused and think I'm the one adjusting the volume on my device? I have little doubt that someone will find a practical application for this but we move our hands around all over the place on a regular basis so how is it going to distinguish 'signal' from 'noise'.

Do I understand this correctly? (2)

fozzy1015 (264592) | about 10 months ago | (#46376955)

It's a receiver that doesn't require a power source, but to say change the channel on a TV, it needs to be connected to some sort of transmitter that DOES require a power source.

A Stupid Question Is One You Can Answer Yourself! (0)

Anonymous Coward | about 10 months ago | (#46376991)

It's a receiver that doesn't require a power source, but to say change the channel on a TV, it needs to be connected to some sort of transmitter that DOES require a power source.

You see, you can put this device IN THE TV as part of it. Now you don't need a standard battery powered remote control.

Wow, that sure took a lot of thought!

Re:A Stupid Question Is One You Can Answer Yoursel (1)

fozzy1015 (264592) | about 10 months ago | (#46377051)

It's a receiver that doesn't require a power source, but to say change the channel on a TV, it needs to be connected to some sort of transmitter that DOES require a power source.

You see, you can put this device IN THE TV as part of it. Now you don't need a standard battery powered remote control.

Then what would be the point of it not requiring an external power source if it's built into something that does?

Also, "The prototype could correctly identify the gestures more than 90 percent of the time while performed more than 2 feet away from the device."

I prefer sitting much more than 2 feet from a TV. There are already powered hand gesture systems with much better range that can be built into a TV.

Wow, that sure took a lot of thought!

Obviously it didn't.

Re:Do I understand this correctly? (0)

Anonymous Coward | about 10 months ago | (#46378577)

It gets power it needs from the energy in the radio waves transmitting TV signals. Therefore doesn't need to be plugged into something providing power. Useful since it can then be plugged into interfaces that accept some signal in but provide no power out pins.

+1 Nomination for AWESOME (4, Insightful)

bbsguru (586178) | about 10 months ago | (#46376999)

OK, so the effect of body position and proximity on a received signal has been known for a long time. Interpreting it and assigning meaning isn't that big a stretch, I guess. But to combine that with this kind of low (no?) power implementation is brilliant!

I suppose some killjoys will complain that the parts of the world most in need of low power tech are also those most lacking in the ambient signals needed to make this work. Pffft! This is simply brilliant.

'cause that's reliable (2)

holophrastic (221104) | about 10 months ago | (#46377027)

so it works in a big open park in the middle of a city. it doesn't work at all in the middle of a farm, or between cities. It's sketchy on the street between two buildings. And it's intermittant in the underground parking garage.

tvision rabbit ears always worked well. they never needed crazy adjusting, nor aluminum foil.

Prior art? (2)

techhead79 (1517299) | about 10 months ago | (#46377059)

http://en.wikipedia.org/wiki/Theremin [wikipedia.org]

This isn't exactly a new concept, just used in a new way.

Re:Prior art? (1)

Anonymous Coward | about 10 months ago | (#46377243)

The theremin generates the radio signal, using quite a bit of power. The point of this is that it can detect changes in the surrounding radio noise and not needing to create it itself.

To the Arduino! (2, Informative)

Anonymous Coward | about 10 months ago | (#46377369)

I'm throwing things down on my breadboard as I speak.

Think about it this way, Radio waves are just electromagnetic waves like light. It's all around us. Our eyes can detect it bouncing off other things. This is just a eye that can detect the radio waves reflecting off of things. Astronomers do this all the time with radio telescopes, which I would figure these guys used a bunch of their concepts for this.
The really major part of doing this is knocking out the noise to be able to discern the motion. That, I expect, would have to be using doppler effect techniques. All of these things have been really been developed for meteorology, astronomy, radar, etc. This is just bringing the idea to the near field.
Looking at the oscilloscope is really very cool how well it's filtered out and is really only the motion signal.

Re: To the Arduino! (1)

phil colbourn (3557895) | about 10 months ago | (#46378241)

What can be recognized with 1 pixel?

psychic (3, Interesting)

geoskd (321194) | about 10 months ago | (#46377379)

As these devices get closer and closer to "invisible" technology, it starts to lend some credibility to the idea that someday humans will be able to be retrofitted with various ESP-like abilities...

Ok, break out your tinfoil hats *now*

The sensor does not consume power. (1)

140Mandak262Jamuna (970587) | about 10 months ago | (#46377935)

You still need power to act on the recognized gestures. But to output a small set of states it does not consume power and uses ambient energy. Looks like they recognize some four or five gestures. Hand coming in, hand going out, fist. Mixing them temporally, they may be able to get some 8 different states. It can lead to always on sensors, but even to act on the recognized sensors you need an always on actively powered (not ambiently powered) system.

It is cool, though.

Re:The sensor does not consume power. (1)

140Mandak262Jamuna (970587) | about 10 months ago | (#46377961)

Hope they give they make large number of these sensors and give them to Zen Buddhists. They seem to be doing some deep research on forests, trees, and making sound when there is no one to hear it.

Old idea with a ridiculous heading: (2)

Ozoner (1406169) | about 10 months ago | (#46378029)

Without batteries? Bullshit.
A glance at the video shows it lighting a LED. Where does that power come from?

It's a very old idea. Passive Radar was first demonstrated in 1935
https://en.wikipedia.org/wiki/... [wikipedia.org]

Theremin (1)

horm (2802801) | about 10 months ago | (#46378297)

So they built a theremin. Whoopdie-doo.

Ambient EM radiation. (1)

Alsee (515537) | about 10 months ago | (#46378729)

The sensor uses an ultra-low-power receiver to extract and classify gesture information from wireless transmissions around us.

I live in a Faraday cage, you insensitive clod!

P.S.

I approve of the name AllSee... well... except that they should drop the stupid CamalCase on the 'S'.... and the two l's might be a bit redundant.

-

Ooh pretty (0)

Anonymous Coward | about 10 months ago | (#46386919)

I like the beta!

Kinect... (1)

chiefmojorising (114811) | about 10 months ago | (#46389019)

...doesn't require batteries.

Check for New Comments
Slashdot Login

Need an Account?

Forgot your password?