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Mixed-Reality 3D Volumetric Projector
First time accepted submitter Gortu writes "We are describing and demonstrating a 3D Volumetric Projector (YouTube video); in short words: a device that enables mixed reality. The 3D projector has very poor quality, we just have 10 rotational voxels (as we are using only 10 regular LCD projectors), but is proof of concept for developing a commercial solution."
wow europeons - congratulations on implementing technology which has existed in Disney World for 3 decades.
10 projectors and smoke... quick someone give them a patent.. lol
And don't do drugs.
Similar things have been done with lasers for years. It's not really a new idea.. This guy just uses LCDs instead, which don't even seem to work as well. Watch the opening ceremonies of the Olympics in Athens from a few years ago for some pretty decent 3D projections in space.
http://www.youtube.com/watch?v=tmGy9zPrWTU&feature=related
The smoke-and-projectors system looks like a nice prototype, but it's a long way from practical. Needs more projectors, and some way to maintain uniform fog distribution in a room.
If by several he means everything..yeah.. that's a good point. I can't believe I just sat through that.
As a proof of concept, it works better than I thought it would for such a small number of projectors (probably why everyone who's already had the exact same idea has dismissed it without trying it). Using many more, dimmer, projectors (a bunch of those always-in-focus pocket laser projectors would be perfect) would minimise the brightness of the ghost beams and spread them over a wider area.
My best idea is to use a hundred pulsed water guns and a laser that can be precisely aimed on the fly. You emit downward-dropped, fast-moving squirts of water algorithmically timed so that when the drop reaches the "pixel" the laser also illuminates that spot, making a pixel appear in midair. If the guns are in a row, that's a 2D plane. You could do this with a 100x100 water guns to make a 3d system, where 2d is the box of water guns on the ceiling, and 3D is when the drop is illuminated.
Make sense? I so want to do this!
--
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CS majors know the time/space tradeoff, but they never get taught the 3rd, crucial, tradeoff of the set: comprehension!
Kermit the frog?
This approach by Sony shows much more promise in the short and medium term:
http://www.youtube.com/watch?v=inlyXhKDQwg
No walking through the image, though.
Singularity: a belief in the "God" idea with the "demiurge" relation inverted.
A laser can give out phase, which results in spatial cancellation of multiple (synchronous) rays. An LCD cannot. Don't see what this guy tries to achieve here...
This video is lame. What did these guys accomplish? It is kind of hard to tell. 10 projectors + smoke. A guy claims there is a sphere -- well I do not see it. Now he says he is walking inside the sphere. Still do not see it.
What the hell is this?
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While this HAS been done before for decades w/ "lasers" & the narrarator wasted too much time w/ obvious philosophies, the off-the-shelf projector use IS intriguing & it's nice to see someone finally implement it freely. Still, brightness/contrast is shit, light-bleeding is a BIG problem & the whole setup is useless w/o a fog machine. I'd still love to see a high-resolution color setup though...
I think I saw this at a laser show in 1990. Using a projector instead of a laser isn't really that interesting.
... and a lot of smoke.
What was the guy talking about at the end, what the hell was in that smoke? The same stuff that led him to believe what he was doing was new, innovative or of sufficient quality to go public? I think everyone understands how things like this work and how bongs work... all without consulting a pair of stoners.
Talk about vaporware. It even includes a video of vapor.
Ok, interesting idea.
One way to make it better would be to use eye trackers. Then the image from each projector would mask out a small area around each users eyes. if you're going to have an installation using hundreds if not thousands of projectors, the expense of tracking the eyes in 3D space and calculating the appropriate mask for each projector shouldn't be too great. If you don't have the precision and time responsiveness necessary, just mask out the entire face using commercially available face recognition algorithms.
This should allow a much nicer experience as "glare" would be drastically cut down. (You're still going to get scattering from the light but at least it won't get you directly in the eyes). Maybe this would allow you to boost the brightness which might let you reduce the number of projectors (but obviously the more projectors the better).
Anyway I'm wondering what kind of smoke/gas might be used that wouldn't harm the users. If possible, a non-toxic smoke/gas that "glowed" upon being illuminated (like the paints used under UV light) would be best. Ideally you should find one with a non-linear response (it shouldn't glow at all unless the combined illumination from several intersecting beams turned it "on").
If no such smoke/gas could be found, how about other transparent but liquid or solid mediums? This would prevent the user from "entering" the volume (unless they wore a dive suit!) but still might make a useful 3D display. (Keep the eye tracking masks to avoid zapping the users watching from the periphery). Again, what would really make it great would be if the medium had a non-linear response to the projectors; any photo-chemists out there?
Needed: optically transparent medium which "glows" (quickly and reversibly) non-linearly in response to relatively (we're not talking high powered lasers) low light levels. Preferably non-toxic and cheap.
Smoke and mirrors.....and flashlights. Cool, man.
Hebrews 11:8
Jeremiah 33:3
Well, I for one welcome our new smoke filled virtual future.
But seriously, that was the assiest demo I have ever seen. Are they kidding? Maybe it's a viral ad attempt.
Haven't these guys heard of a hazer? Maybe in 10 years they can catch up to the current U2 tour's tech.
Smoke + a few projectors? Wasn't this done in something like the 50's? I like this approach more: http://www.youtube.com/watch?v=KfVS-npfVuY Basically, they use lasers to excite atoms in the air in the room, creating small glowing plasma balls as pixels. Not by far ready for any commercial use (seems to be able to "draw" someting like 20 pixels per second), but at least it's "true" 3D projected in mid-air without smoke or mirrors.
Um, whats the difference between this and the TI spiral projector that has existed for over 20 years and works at HIGH resolution in full colour?
Never thought they could image a Steampunk version of Prof. Lunazzi's 3D screen - http://www.physorg.com/news156072878.html
Wait...using vapour and one LCD projector per voxel is "serious" not Steam age retro joke? What???
-><- no
Seriously, the local planetarium used to put on laser shows with fog machines and way cooler effects than this, they worked on the same principal. Not to mention the music was a lot better.
Pretty lame.
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Wow. Where'd that load of butthurt come from?
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Well, not so hidden - it was spoken at the end of the video:
"A philosophical note: Never forget, you have power, and the enemy of this power of yours is fear. That's why we are constantly bombarded with bad news. That's why accepting things you don't like is giving away your power...."
I think this is a great philosophy. How often do you watch the news and everything is gloom, doom, collapse, corruption.... Rarely do we hear about the good things people do.
"Lame" - Galaxar
Okay, while this was kinda cool, like most people have been mentioning, nothing new really... To be honest when I read the title I thought it was some sort of advancement of this caliber: http://www.youtube.com/watch?v=KfVS-npfVuY
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this brings up something i think nvidia could do with their 3d vision glasses. they should intergrate infrared leds in the sides of their 3d glasses, and package a webcam with them, so they can do a johnny lee style headtracking thing, as demonstrated in this video. nvidias 3d vision already makes starcraft 2 look like your looking at a table with 3d minatures on it. the only thing missing from it to make it look like a fully fledged 3d object sitting behind your screen is the ability to move your head around to see it from different angles.
fVisiOn light field projector demo, using animated Hatsune Miku. Check out the part where the mirror is placed behind her:
http://www.youtube.com/watch?v=u1E_LgLaiRE
The Emperor? He's coming here? -We shall redouble our efforts!
title says it all.
I think that's a great idea.
Some problems:
* Since water is transparent, voxels closer to you won't block ones farther from you. Everything will be translucent.
* Reflections and refractions will cause unintended lighting.
* Drop size and timing precision will limit resolution.
A few thoughts to make it work well:
* The drops will take a while to fall. For playback this is fine, but for realtime use you'd need to release drops in case they might be needed. Thus you need a generic drop pattern to project onto.
* A good pattern might be to drop the drops in regular waves / sheets sweeping away from the light source (assuming it's above the display; sweep toward it if it's lower) - IE, you're creating curved surfaces that are approximately facing the projector. The faster you can sweep the faster your refresh rate; it's limited by making sure the sheets don't start blocking each other.
* Release the drops well above the top of the display. That way they'll be moving faster (less interference; better refresh rate) and a more consistent speed (instead of near-stopped at the top of the display; less curvature in the sheets).
* Use colored drops! If you drop Bayer-pattern RGB sheets and use narrow-band color filters on the light source you might decrease the problems of reflections and refractions considerably - each voxel won't significantly illuminate its neighbors, and will only illuminate some of the drops on the next sheet.
* If you use colored drops, arrange the nozzles in RGBG rows and use dedicated rows of drain-troughs to catch each color so they can be reused.
* Use opaque pigments. It will reduce the refraction problems, but it will probably make the viewing angle narrower.
* With multiple projectors and a really complicated drop pattern you could probably make an amazing display, but the math to find interfering drops gets hard.
Good luck!
Absolutely LOL! Way to overreact considering there were snarkier comments. Seriously, are you the special friend of one of the Smokapalooza developers? You should get off the internet if snark gives you the vapors to such an extent, or make sure there's a fainting couch next to your computer at all times.
I think I saw this at the planetarium during a "Laser Floyd" show; As I mater of a fact, I think I saw this at a Pink Floyd show...
No technical innovation, of any significance, in demonstrated in the YouTube video above. I look forward to 3D volumetric displays but I won't be looking in their direction.