Elements S4 • E96

This Laser-Shooting Camera Can See You From Around the Corner





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Published on Sep 28, 2019

Can’t see what’s hiding around the corner? That’s no problem for this camera, which measures scattered light from a laser to detect objects outside its line of sight.

Curious to learn more about how seismic imaging is able to reveal deep Earth dynamics? Learn more at the Oxford Seismology Group (http://seis.earth.ox.ac.uk) and from the developers of AxiSEM (http://axisem.info/).

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A team of researchers at Stanford University developed a camera that can capture moving objects hidden around corners.

And unlike the similar camera tech that exists already that requires objects to reflect light evenly and strongly (which is not always the case), this new camera system can reflect light off objects with different textures and surfaces, including a disco ball. And not to mention the camera is faster than the older systems that have been used to see around corners, making it a better fit for autonomous vehicles.

And while the new technology is in its early stages and is somewhat low-res, this camera could be a game-changer for driverless cars.

So how does it work?

It’s pretty simple actually.

These kinds of cameras use lasers to accomplish this seemingly impossible task, firing the laser at a wall opposite the object of interest. The light scatters off the wall, and reflects off the object hidden around the corner and back onto the wall. Sensors, paired with a processing algorithm, measure how long it takes for this scattered light to return to the wall, and using those measurements, the system can accurately reconstruct an image of what’s hiding around the corner.

Pretty cool, right?

And this new and improved camera system created by the Stanford team can do all of this in real time.

The team of researchers was able to make these improvements in time efficiency, plus the system has the ability to detect a much wider variety of objects that reflect light in more complex ways, because of improvements both to the laser and in imaging reconstruction techniques. The laser in this new system is 10,000 times more powerful than the one used in their experiments from last year.

On this episode of Elements, learn more about this new camera tech that could not only improve driverless cars, but also benefit other fields like robotics and medical imaging.

#Camera #AutonomousCar #Laser #Science #Seeker #Elements

We’ve Just Invented the World’s Fastest Camera

Read More:
Stanford camera can watch moving objects around corners
"The laser scans a wall opposite the scene of interest and that light bounces off the wall, hits the objects in the scene, bounces back to the wall and to the camera sensors. By the time the laser light reaches the camera only specks remain, but the sensor captures every one, sending it along to a highly efficient algorithm, also developed by this team, that untangles these echoes of light to decipher the hidden tableau."

Non-Line of Sight Imaging
"This time-of-flight information is then used to reconstruct a series of ellipsoids that all overlap at a given point on the hidden target, allowing computational software to calculate the distance between the camera and the hidden target and recreate a 3D model of the target."

Wave-Based Non-Line-of-Sight Imaging Using Fast F-K Migration | SIGGRAPH 2019
“f-k migration is more robust to measurement noise than alternative methods, generally produces better quality reconstructions, and is easy to implement.”


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