[Fluxus] kinetic

[evan.raskob [lists]]

That's really cool, what a great idea to use a photo camera... thanks for sharing that!

Best
Evan


On 2 Dec 2010, at 15:48, Scott wrote:

> You are totally correct, after a little research (done by a friend, who's been deconstructing a kinect and reading the patents, not by me!).
> 
> The original "zcam" was a time of flight system.
> 
> The Primesense system is a structured light system, but it does seem to take advantage of the construct/deconstructive interference of the IR LASER it uses. It looks like the laser passes through an HOE (holographic optical element) to create the structure portion.
> 
> Here's my friends blog post on his explorations:
> 
> http://www.danreetz.com/blog/
> 
> 
> On Thu, Dec 2, 2010 at 1:13 AM, David Griffiths <dave at pawfal.org> wrote:
> On Wed, 2010-11-17 at 08:10 -0800, Scott wrote:
> > Here's a link to the company that makes the underlying technology...
> > or one very similar to it: http://www.primesense.com/?p=487
> >
> > What's interesting about the zcam is that it actually uses
> > TIME-OF-FLIGHT to compute depth, so IR reflectivity shouldn't really
> > matter!
> >
> 
> It does if the pulse they are sending out to measure is IR. IIRC the
> picture image is captured at a different time to the depth. Sunlight and
> reflective materials were a problem with all the cameras we were looking
> at.
> 
> In any case I thought the kinetic camera was using structured light - as
> it has a projector which projects a pattern on the scene, ir camera to
> measure it and a normal rgb camera.
> 
> The ir camera and rgb camera are seperate, so you get the shadow effect
> you can see in the depth images - time of flight cameras use the same
> lens so are a little better.
> 
> cheers,
> 
> dave
> 
> 
> 
> 

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