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buglerbilly
26-01-10, 01:11 AM
Danger Room What’s Next in National Security Paging James Cameron: Pentagon Wants 3-D Surveillance

By Katie Drummond January 25, 2010 | 8:50 am



Think Avatar for military spies. Pentagon far-out research arm Darpa wants to turn surveillance into a 3-D experience for troops. It has launched the Fine Detail Optical Surveillance (FDOS) Program, and are requesting proposals for prototypes of optical imaging systems that would use “advanced high-resolution 3-D imaging technology.” Darpa wants two kinds of surveillance systems: portable units for active battle and drone-ready systems for unmanned planes.

The agency wants proposals that start from scratch, using a fundamentally new model for obtaining video footage. The 3-D surveillance should be able to monitor moving targets with high resolution, from different ranges, and without the need for users to do much legwork, like scanning or refocusing on a target. Darpa anticipates that 3-D surveillance would boost field of vision and depth of vision “by over 100X” compared to existing systems.

That’s a big step up from the best drone surveillance in use right now. According to Darpa, current spy-cam systems with 3-D capabilities are big and unwieldy, and can only handle a small surveillance zone without user input. The new 3-D models, by comparison, should rapidly identify targets that are as tough to spot as ”a needle moving along the surface of a haystack.” Plus, they’d solve one of the biggest complaints about Predator video feeds: Depth perception is often lost in grainy footage, and the view is so narrow that it’s been likened to “looking through a soda straw.” This new project holds the possibility of changing that. Next step is doing something about the motion sickness that goes along with swooping in the air.

The military’s already working on other out-there video systems, like Gorgon Stare: a sensor that can film an area two-and-a-half miles around from 12 different angles. But even the most impressive UAV sensors still operate with camera lenses, whereas the 3-D systems wouldn’t: Darpa anticipates the use of advances in focal-plane arrays, laser technology and image processing algorithms. Exactly how they want the 3-D systems to work is still under wraps: part of the solicitation remains classified.

Of course, going 3-D isn’t without its challenges. Much like the downsides of new 3-D television sets, the surveillance would require a specific degree of dim lighting to get optimal footage. Three-dimensional TVs are also being derided for causing eyestrain and headaches, but Darpa’s current solicitation seems more concerned with out-of-this-world surveillance than troops’ ocular health.

If Darpa’s really interested in following Hollywood trends, they might want to take note of the progress among Australian researchers. Last month, an Aussie company debuted a hovering drone that was right out of Avatar, and the federal government just handed out $1.01 million for the development of a 3-D surveillance system that’s being compared to “a game of Doom.”

[Photo: Twentieth Century Fox Film Corporation]

buglerbilly
07-07-10, 08:28 AM
Look Ma, No Glasses: Moving to 3-D Television and Beyond

August 2010 (I brought this one back from the future...........:cuckoo)

By Grace V. Jean

Millions of moviegoers have donned stereoscopic glasses to experience Hollywood films in 3-D. As the concept catches on in broadcast television, sports fans increasingly are putting on the filtering spectacles to watch their favorite stars compete in tournaments.

In the future, military robot operators may search for roadside bombs in 3-D.

Demand for 3-D television is growing, and technology efforts are under way to provide viewers with better resolution on high-definition displays. But scientists also are researching ways to get rid of the glasses to let viewers see three-dimensional images with the naked eye. Ultimately, the goal is to produce holographic images that can be projected onto coffee tables — a concept popularized in science fiction films including “Star Wars”
and “Minority Report.”

Humans perceive the world in three dimensions because of the two-inch distance between their eyes. Each eye sees a slightly different field of view and the brain combines the two perspectives. Depth perception results from the binocular vision system that calculates the distances between objects.

To capture the 3-D world on film, cinematic photographers place two cameras side-by-side like eyes and shoot footage through both lenses simultaneously. When the two image sets are superimposed over each other, they show varying perspectives of the same objects. Stereoscopic glasses filter one set of images into each eye so that the blended picture registers in three dimensions in the brain.

James Cameron’s 2009 film “Avatar” set a new film industry standard with its fully immersive qualities. His achievements are fueling an aggressive push into 3-D programming by the broadcast television industry, says Chris Lennon, chief technology organization group lead for Harris Corp., which produces communications equipment for commercial and governmental sectors. The company in April unveiled a suite of signal processing and encoding technologies that will allow the TV industry to broadcast programs in 3-D.

Initial 3-D offerings involve a single HD stream that is split in half — one half for each eye. The quality of the picture is the same, but it only has half the resolution, Lennon says. Full HDTV streams for each eye, similar to those seen on the silver screen, are several years away as technologists wrangle with bandwidth challenges.

Compressing the signals is one solution, but there are ways to attain 3-D video more efficiently than transmitting two full HD streams, Lennon says. There are several “2-D plus data” schemes. One method is to transmit a compressed HD signal with data representing images for the second eye. On the receiving end, the signal is decompressed to produce the two full HD pictures.

Reliant on imaging feeds, the Defense Department could benefit from those advancements. It has been shifting to HD video in recent years. Its next step could be to adopt 3-D systems. The power of 3-D will be evident in close-up video, Lennon says. Explosive ordnance teams that control robots to dismantle bombs may find good use for the technology. “Just as a 3-D image can be more pleasing to a home viewer, it can also provide more information to a government viewer,” says Lennon. Operators of remotely piloted aircraft, such as the Predator and the Reaper that fly high above the objects that they capture on video, may find the technology less useful because distance becomes a limiting factor.

On the commercial side, the gradual transition to HDTV is progressing at a steady pace. The adoption of 3-D TV by comparison is happening at a rapid and unprecedented clip, says Lennon. The Consumer Electronics Association estimates that a quarter of all televisions will be 3-D capable by 2013. But viewers still will have to peer through special glasses to see the displays properly.

“Getting rid of the glasses is probably the most complex problem to be solved in the area of 3-D TV,” says Lennon.

A number of scientists around the world are working on the problem. Experts predict that breakthroughs in display and imaging technologies are imminent in the coming decade and will make 3-D viewing without glasses a reality.

“Glasses-free 3-D TV will be a necessary interim step on the road to live holography,” says Lennon. “They share many of the same challenges.”

In its bid to host the 2022 World Cup, Japan announced that it plans to broadcast the tournament in live holography. It is an ambitious goal, but the nation is exploring the realm of the possible.

Japan’s National Institute of Information and Communications Technology last year demonstrated the world’s first live holography prototype. Research continues on conical screens through which rays of light travel to produce a 3-D image above a tabletop. A team of scientists also is developing a color holography system to capture and display live scenes in real time.

But technological and financial hurdles abound. “There are several of those to get through before you have no TV on the wall and holographic images on a coffee table,” says Lennon.