Showing posts with label Camera. Show all posts
Showing posts with label Camera. Show all posts

Tuesday, April 24, 2012

A video with a frightful secret that only your camera can see

If you like scary movies, you'll get a thrill out of this one. When I first started watching this, it definitely felt like a zombie was about to pop out at any second. However, this is a really cool thing to try if you have a basic DSLR or micro four-thirds camera.

"To the naked eye this video looks like nothing but a TV screen covered in colorful random static. But there's a secret message hidden in there that only your digital camera can reveal. Specifically, your digital camera with adequate manual controls so you can set your f-stop to 5.6 and your shutter speed to one full second. If all you've got access to is a basic point and shoot or your smartphone, the video below will spoil the surprise and show you what you're missing. Or not missing, if you're the easily startled type."


So, what does a photographer see?

Pretty neat!

Friday, March 23, 2012

Would You Like To Have A Camera That Sees Around Corners?


Scientists at MIT, Harvard, and Rice University have come up with a way to photographically capture the rough shape of objects out of a camera's line-of-sight. The camera untangles bursts of light that's reflected off surfaces it can see. Sounds pretty intense, right? PC Mag's Damon Poeter dives into the details about how the camera work-
The way it works is by shooting several rounds of femtosecond laser bursts at a wall that faces both the camera and a room hidden around a corner. The laser light bounces around the hidden room and returns back to the detector, which measures the time taken for that light to return and the angle at which it returns. That data is enough to describe the basic geometry of the hidden room and any objects inside it, so long as you've got the right reconstruction algorithms and enough computational horsepower to do it. 
And lo and behold, the researchers have managed to demonstrate the principle working in real life (video below). The technology is still at a pretty early stage, however. The team's camera is "able to look around a corner using diffusely reflected light that achieves sub-millimeter depth precision and centimeter lateral precision over 40 cm-by-40 cm-by-40 cm of hidden space," which sounds very impressive until you see the fairly distorted reproduction of the hidden, three-dimensional object they set out to capture.
Ideally, this could be a very beneficial tool for law enforcement to use such as firefighters and police. Capturing evidence just got easier.