Computers & Mobile

The latest DIY ideas, techniques and tools for digital gadgetry, open code, smart hacks, and more. Processing power to the people!

Making walls invisible with augmented reality

Carnegie Mellon’s Dr. Yaser Sheikh has developed a prototype augmented reality (AR) system that combines images from two or more cameras to allow drivers, for instance, to see around blind corners by making intervening structures “invisible.” In the simplest case, the image from a camera on the blind side of an obstacle is mapped, with appropriate foreshortening and in real time, onto the visible surface of the obstacle in the display from a camera at the user’s position.

The concept reminded me of a brainstorm I had during my last commercial airline flight. Crammed into a middle seat on a crowded 747, feeling claustrophobic and a bit airsick, straining to get a look out one of the distant porthole windows, I longed for a pair of AR glasses that would make the plane invisible so I could look freely around the sky. The video feeds from panoramic cameras mounted above and below the fuselage could be combined and processed through a head-tracking system so that passengers could have an unimpeded external view in any direction they cared to look–the ground, the clouds, the night-time stars up above. Such a system would have no clear commercial purpose other than passenger comfort, but think how much more enjoyable those long-haul flights could be if you were soaring through the wild blue yonder instead of staring at the back of the seat in front of you?

[via Boing Boing]

Mercury “beating heart” works with gallium, too

So it turns out, happily, that the mercury beating heart demo I wrote about a couple days ago can also be done with molten gallium, which is vastly less toxic than mercury and requires only slightly higher temperatures. The chemists at the University of Nottingham who produce The Periodic Table of Videos made this very informative video demonstrating the process, which is slightly different from the mercury beating heart demo in that there is no iron nail present. The gallium blob “beats” anyway, but much slower than the mercury with the nail. I bet using a nail would make the gallium version beat just as fast. [Thanks Filip!]