[PD] Live motion tracking using pd / gem / GridFlow / PiDiP

[Max Neupert]

Hi list,

I am working on a project where I want to confront the observer with a
projection that changes according to his/her position, thus eliminating the
effects of perspective.

http://www.revolwear.com/p

The part with the distortion of the image is already done, so what is left
is the live video tracking (positioning) of the spectator. I want to extract
from a video feed (firewire NTSC cam) the position in coordinates X,Y.

This is promised to be done by the gem object pix_movement
like suggested in
http://iem.kug.ac.at/mailinglists/pd-list/2003-10/006848.html

So I tried that, the problem is that the object just understands the RGB
colorspace, converting the YUV camera stream first seems quite a processing
task for the computer.

I succeded in creating a gem patch according to the tutorial patch which
does something, but there is no working tracking
(see attached patch)

Installing PDP & PiDiP did not lead to a big success either because of a
knowledge-lack on my side as well as few documentation and poor performance
on OSX.
http://iem.kug.ac.at/mailinglists/pd-list/2003-10/006710.html
The links in this suggestion are broken.


Has anybody experiences with motion tracking in pure data using whatever
extension?

I would like to put a helpful page online with my experience as soon as I
get it working.

Also I'll be on Saturday at the user group meeting at the SAT.


-- 

Max Neupert
Montréal


http://www.sat.qc.ca/calendrier/2004/03-04/30_0304.html#english

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