Am 28.02.12 15:47, schrieb Jack:
Le 28/02/2012 06:25, Matthias Kronlachner a écrit :
Am 28.02.12 00:00, schrieb Jack:
Le 27/02/2012 15:51, IOhannes m zmoelnig a écrit : 
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On 2012-02-27 15:20, Jack wrote:


I use Ubuntu 11.04, Pd 0.42.6 and Gem 0.93.git fad1264.

upgrade Gem to at least "0.93.git 1482ffb1538"

and do a complete rebuild of Gem.

fgmasd
IOhannes
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OK, i upgraded Gem to ver: 0.93.git f1a1841 and now i can render the scene without crash.
But, i can't see anything working there : I get a blue sphere where it is write 'gem' and a white rectangle in the top-left corner (even if i select 'rgb 1' in [pd properties]).
If i click on the message 'video_mode' in this subpatch, Pd crash. And if i click on 'bang', nothing happens in the console (there is no available modes).
I miss something ?
One comment : it is very strange to see two [gemhead] connected directly in [pix_openni]. Is there a meaning ?
Thanx for help.
++

Jack
hi!

did you check if the examples included in OpenNI and Nite work? (eg. Sample-NiSimpleViewer, Sample-SceneAnalysis)
they should be somewhere in the Samples/Bin folder.
if they don't work, pix_openni won't work.

ok the crash with video_mode and depth_mode msg is fixed now. but it happend only if image or depth was not started. i was a little bit lazy testing everything without working kinect plugged in.
if you send a [bang( it now writes an error message to the console if no device is available.


so i think you have a problem with your openni/sensor kinect installation.
did you install sensor kinect? this is the driver which allows openni to access the kinect sensor. (https://github.com/avin2/SensorKinect)
you also need the unstable release of OpenNI (-> see install instructions from SensorKinect)


the two gemheads have a meaning - of course.
pix_openni outputs two separated pixes - one "rgb" image from the camera (left gemhead and outlet) and one depth image in various formats from the depthsensor (right gemhead and outlet).
actually it's more implementation side - it could be realized with one gemhead as well. but i did it this way and for me it's logical.
you can also make it with one gemhead and a [t a a] if it looks better for you:

[gemhead]
[t a a]
|     |
[pix_openni]
....

matthias





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Hello,

OK, it is working now.

In the pix_openni/README, i would prefer to follow these instructions in 5 steps (in the middle of the page) :
http://groups.google.com/group/openni-dev/browse_thread/thread/49a4dd13c045c1a2
instead of :
*    get and install OpenNI, NITE and the hacked Primesense Kinect driver
    --> instruction: https://github.com/avin2/SensorKinect
    http://www.openni.org/Downloads/OpenNIModules.aspx

And all should be OK.

Matthias, the hand tracking should work fine ?
Thanx for this external.
++

Jack


ok, i will check that. thanks.
i think things change every month about installing openni/nite/sensorkinect.
but as you found out there are enough resources that help you with the installation out there.
thats why i prefer pix_freenect for projects that don't need skeleton tracking. it's a lot more easy to install and i think also cheaper in computation power.
the output format of these two objects is basically compatible. so you can always exchange them if you don't need external tracking stuff.
just a few initialization messages depending on which output mode you want to have can be different.

for hand tracking you have to make a waving gesture.
wave your hand several times after you activated it. after some time nite should recognize your hand and start tracking.
if you want more easy hand tracking there is the possibility to use pix_multiblob in combination with filtering the depth image.

if you want to track severall hands you can check the Nite.ini files located in these folders: /usr/etc/primesense/Hands_1_*
and uncomment the lines there (remove the ;   )


thanks for your reporting. that helps to make it more stable.

matthias