[Fluxus] kinetic

[Scott]

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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