![]() GIMP also has a feature called Polar Coordinates (Filters->Distorts->Polar Coordinates) that you can use, although it unfortunately tends to make things a bit blurry (whereas this is not the case with GProjector, so I recommend using the latter for this). I've considered taking out the poles on the top and bottom, mostly because I don't know how to shape it to resemble an actual land mass on the globe projection.The easiest way is to just use GProjector to essentially move the pole to the equator, then you can easily map it as you would normally, and just switch the pole back (again, using GProjector). I'm still just learning how to make a map in general. However, I'm not terribly concerned at this point making it perfect to a globe, at least not yet. But there’s less than meets the eye.Thanks for the feedback! I should redo the coloured map to the projection scaling. "They did a nice job of generating the character-no question about that. "This was a beautiful piece of content, the stagecraft was very nice, but there were not a whole lot of breakthroughs in the display end," Bove said. The company has been pretty quiet about the precise details of the Tupac performance, with company representatives being careful to say that it wasn’t a true hologram, but rather a "holographic illusion." This is despite the fact that the company’s own press release refers to it as a "hologram" and a "holographic projection." AV Concepts hasn’t said whether Tupac’s motion was taken from actual video footage of the rapper, or how the audio was created-Bove speculated that the audio may have been performed by a voice actor who sounds similar to Tupac. I’m surprised more people don’t know more about this because it’s been around since the middle of the 19th century," he said. The folks who made the content did a really lovely job. And that’s the part we should be celebrating. "This is digital substitution of a character who’s not here anymore-and that’s wonderful. "It’s a beautiful piece of CGI," said Michael Bove, the head of the Object-Based Media group at the MIT Media Lab. However, in this case, a high-quality digital rendering of Tupac was simply projected onto that foil. It was called a Pepper's 'ghost' as the image wasn't very bright when using pre-electric light sources." "For a large piece of glass to support its own weight on the 45-degree angle, it has to be very thick," explained James Rock, a creative director at Musion, a British company that has pioneered this technique, in a 2010 interview with the UK newspaper The Independent. The company said in a press release on Monday that its on-site server "delivered uncompressed media for 3 stacked 1920 x 1080 images, delivering 54,000 lumens of incredibly clear projected imagery." These days, AV Concepts, the San Diego-based company behind the Tupac performance, uses a proprietary Mylar foil, known as Musion Eyeliner, rather than glass. ![]() But off to the side, behind the glass, there’s a hidden room that has the original object being projected. However, hidden on stage is a piece of glass, where the images can be reflected from and pushed into a target area that makes it seem like a single room. In the case of the Tupac "hologram," that’s the main stage where a real-life Snoop Dogg and Dr. So here’s how it works: the audience needs to be able to see into the main room, but not into an adjacent hidden room. As a result, the technique was named after him. John Pepper, a British chemist, adapted a technique conceived by fellow Briton Henry Dircks, for use in the theater by the middle of the 19th century. Heck, even a Canadian backyard engineer built one in a few days for Halloween. "The impressive thing here is how life-like and detailed and natural it seems, and that’s just an outcome of advances in computer rendering than display."īut of course, while Tupac may be the best (and possibly first posthumous) performance of a Pepper’s Ghost illusion, there have been plenty of others in recent years. "It is amazing, no question about it," David Brady, the head of the Duke Imaging and Spectroscopy Program at Duke University, told Ars on Monday. This combination of high-quality computer rendering and old-school optical trickery has impressed many experts. Rather, it was a clever optical illusion technique known as "Pepper’s Ghost," which dates back to a technique first described by an Italian scientist in the 16th century. Only problem? This wasn’t a hologram at all.
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