Breaking Motion Capture Out of the Studio 39
Fnord666 writes with a CMU press release. From the article:
"Traditional motion capture techniques use cameras to meticulously record the movements of actors inside studios, enabling those movements to be translated into digital models. But by turning the cameras around — mounting almost two dozen, outward-facing cameras on the actors themselves — scientists at Disney Research Pittsburgh, and Carnegie Mellon University have shown that motion capture can occur almost anywhere — in natural environments, over large areas, and outdoors."
MS Kinect (Score:1)
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The problem with Kinect is the limited minimum range (50-80cm) at which depth information can be extracted; while visual systems are affordable and in the price range of researchers to study, in the long term electromyography probably will be the long term technology of choice.
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in the long term electromyography probably will be the long term technology of choice.
I'm sorry, but do you have a license from the Department of Redundancy Department? I'm going to have to see some documentation.
Inevitable (Score:1)
In Soviet Russia, motion captures you!
Just a matter of compute power (Score:2)
This sounds obvious, but when you look at it like many things these day it is a matter of compute power, particularly having enough at a reasonable price to make it practical.
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Actually the software that figures stuff out is remarkably complex. I wonder how long until someone makes a game where you wear VR Goggles and carry a nerf sword, and you're out in a field killing orcs by swinging the nerf sword around.
And how long after that until there is an uptick in arrests for bizarre, aggressive behavior in usually introverted males?
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Well, it's mathematically complex, but not really complex in a code size or if-then count sort of way.
Here are two videos (1 [youtube.com], 2 [youtube.com]) from 2007 showing the jist of it (including some games that modify reality) done in *realtime* using a laptop GPU card.
It's basically...find a bunch of "features" in a scene (corners in some texture, circles, etc), then look at how these features move in the scene as the camera moves. Each feature is in a fixed point in space, so, their movements are caused by the camera moving. U
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Re:Not sure there's an advantage (Score:5, Interesting)
Just wait for version 2.0 where the cameras are smaller than the size of a coin and everything is neatly sewn into a spandex motion capture suit. Think of potential over real terrain, rock climbing, tree climbing, etc.
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*shudder*
do NOT want
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I'm assuming the cameras are big because they hold a get nice big, high sensitivity, sensors and probably low F-number lens. Motion blur on something like this would make things MUCH more computationally difficult compared to snapping a clean picture and figuring out which way the camera is now facing. Motion blur can be estimated [google.com], but you wouldn't want to do that every frame...
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Did you notice the 'research' part?
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It's an interesting reference but it's no replacement for a talented animator.
Talented animators are very good at what they do, but you're wrong. Motion capture is the most accurate method of character animation in existance... it's a matter of having a complex enough rig and a good enough actor. If you have those two things, then you have perfect animation every time. And it's cheaper and less time-consuming too. Something tells me that you're an animator that's afraid he might be out of a job soon.
Motion Sensors? (Score:1)
Interesting approach, but also... (Score:4, Interesting)
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because the kinect won't work outside or in large areas.
So how long .... (Score:3)
So how long before the inevitable application of "Rule 34" to this?
Let's face it, the porn industry has been a leader in adopting technologies for some time now.
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Oblig XKCD to explain rule #34 in-a-click: https://www.xkcd.com/305 [xkcd.com], for those that provide relevant cultural references without one.
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And of course the rule #34 version of that cartoon itself
http://goatkcd.com/305/sfw [goatkcd.com]
Just to be a bit meta.
Yada yada yada, dl link? (Score:2)
Blender Tomato Branch
http://www.vimeo.com/26420002 [vimeo.com]
Latest build
http://graphicall.org/?keywords=tomato [graphicall.org]
You can find the devs on #blendercoders @ freenode.
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Woops! Copypasted the wrong video.
This one is more informative.
http://www.blendercookie.com/2011/07/14/gsoc-tomato-branch-camera-tracking/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Blendercookiecom+(Blender+Cookie) [blendercookie.com]
Bottoms-up on the info:
http://graphicall.org/271 [graphicall.org]
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I mixed up motion capture and camera tracking. Sorry.
Although... it seems that if the Tomato branch system captures points on a subject from two angles it could reconstruct motion data since that is sort of what it does.
Is this all the same problem? (Score:1)
needs more refinement (Score:2)
The motion-capture of the guy swinging from the monkey-bars looks somewhat realistic until you realize that his hands are swinging around in the rendering when they should be (and are) stationary on the actor.
Should be interesting when the technology matures, though.
limited use (Score:2)
The accuracy on this is pretty bad, as you can see from the comparison to the Vicon system, so this has very limited use in production, and it seems like it's trying to solve a non-existent problem. It doesn't get rid of the cumbersome suit from motion capture, so you can't really get capture data while performing in front of a camera, and there are already solutions [ipisoft.com] on the market that allow you to create a motion capture setup outside using regular cameras and get motion capture data without any tracking m
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The accuracy on this is pretty bad, as you can see from the comparison to the Vicon system, so this has very limited use in production
This is a step along the way toward something useful in production, not a final product.
[...]the practical application for something like that is limited. Attaching cameras and trying to create tracks off of the movement of the background just seems a really backwards way of doing this kind of stuff.
The application is in capturing motion in circumstances where the current way of doing things does not work well. Larger ranges and areas, confined spaces where cameras would be obstructed, that sort of thing. It doesn't replace current techniques, most likely. Instead, it adds new options - once it's accurate enough. Time will tell.
Lord of the Rings (Score:2)