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Headtrack

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Headtrack

Postby falafel » Fri Jan 07, 2011 3:48 pm

Hi list,
I came across with this project, after some small changes it now works with fgfs
https://github.com/ralph-glass/headtrack
Last edited by falafel on Thu Feb 24, 2011 9:37 pm, edited 1 time in total.
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Re: Headtrack

Postby Zan » Fri Jan 07, 2011 4:18 pm

I've tried headtracking (though it was with a custom "helmet" with led markers on it, not as intuitive as pure head tracking) and came to the conclusion that using it to track head panning could be nice add-on, but tracking rotation is highly unrealistic.

There has been some work on the same subject before, which might be worth checking out: http://www.mail-archive.com/flightgear-devel@lists.sourceforge.net/msg04861.html and http://www.gidenstam.org/FlightGear/HeadTracking/

What kind of modifications did you make, would it be hard to integrate that to FlightGear so we all could try it out?
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Re: Headtrack

Postby falafel » Fri Jan 07, 2011 4:28 pm

This post is outdated:
The modifications are already commited in the code.

you start ./headtrack
start fgfs
alt-tab to headtrack
press m this will send events to the mouse.
alt-tab back to fgfs and right click twice to get the <-> and move your head.

you need sudo modprobe uinput
and chmod a+rw /dev/uinput
before starting headtrack.


Now you just need to launch headtrack
copy the headtrack protocol file to $FG_ROOT/Protocols/
and start fgfs with the following parameters:
--generic=socket,in,100,,3254,udp,headtrack
--prop:/sim/headtracking/enabled=1
Last edited by falafel on Thu Feb 24, 2011 9:43 pm, edited 1 time in total.
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Re: Headtrack

Postby falafel » Wed Feb 02, 2011 8:46 pm

New code, uses network protocol and is much better than the mouseemu
Last edited by falafel on Thu Feb 24, 2011 9:36 pm, edited 1 time in total.
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Re: Headtrack

Postby Johan G » Wed Feb 02, 2011 8:55 pm

Looks good, and leaves the mouse for the ones flying by mouse. :D
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Re: Headtrack

Postby falafel » Wed Feb 02, 2011 9:19 pm

yes indeed.
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Re: Headtrack

Postby falafel » Fri Feb 04, 2011 12:42 am

Another teaser for what we are developing.
Last edited by falafel on Thu Feb 24, 2011 9:37 pm, edited 1 time in total.
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Re: Headtrack

Postby falafel » Sat Feb 05, 2011 9:53 pm

New version with x,y,z offsets.

get it at :
http://gitorious.org/headtrack


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Re: Headtrack

Postby falafel » Sun Feb 06, 2011 2:19 am

headtrack + 3d

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Re: Headtrack

Postby falafel » Sun Feb 06, 2011 7:58 pm

We added a menu option to modify presets and to enable/disable EasyHeadTrack.

Image
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Re: Headtrack

Postby longfly » Sat Feb 26, 2011 6:55 pm

Hi and really good work!!! :D What is the status of the project?

BTW: I have problems compiling it (I think it is only for Linux, isn't it?) :( (And my webcam is really bad :lol: )
Couldn't you just make a few files that you would only copy in the FG-folder?

Nevertheless, many thanks for your great work!!!! :P

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Re: Headtrack

Postby falafel » Sat Feb 26, 2011 8:50 pm

Sorry for the lack of documentation.
Yes it works in Linux. I do not know about other OS.
We will post more info in the near future.
The code is stable and in the last three weeks we didn't see any reason to change it.
But for sure that more documentation would be benefitial.
Till then,
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Re: Headtrack

Postby jack » Sun Feb 27, 2011 1:29 am

Hopefully we can have this on mac! That would be great for filming.
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Re: Headtrack

Postby gluon » Wed Mar 02, 2011 5:41 pm

Hi,

I tried to compile the latest Snapshot from Git on OpenSuse 11.2 but to no avail.
First the Installation-Instructions are incomplete - you also depend on gtk2 devel. OK, that was figured out quite fast.

However I think the opencv version (2.2.0) supplied with my (old) OpenSuse version isn't up to date (yeah, I know i should upgrade :). This is what I get:
Code: Select all
headtrack.c: In function ‘main’:
headtrack.c:210: error: too few arguments to function ‘cvHaarDetectObjects’
headtrack.c:221: error: too few arguments to function ‘cvHaarDetectObjects’
headtrack.c:229: error: too few arguments to function ‘cvHaarDetectObjects’

But the function looks fine according to the docs I found on the net.
So, which version of opencv do you use (please also name the specific version you depend on in the Installation file)?

Hope this helps.
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Re: Headtrack

Postby hvengel » Thu Mar 03, 2011 8:12 pm

gluon wrote in Wed Mar 02, 2011 5:41 pm:Hi,

I tried to compile the latest Snapshot from Git on OpenSuse 11.2 but to no avail.
First the Installation-Instructions are incomplete - you also depend on gtk2 devel. OK, that was figured out quite fast.

However I think the opencv version (2.2.0) supplied with my (old) OpenSuse version isn't up to date (yeah, I know i should upgrade :). This is what I get:
Code: Select all
headtrack.c: In function ‘main’:
headtrack.c:210: error: too few arguments to function ‘cvHaarDetectObjects’
headtrack.c:221: error: too few arguments to function ‘cvHaarDetectObjects’
headtrack.c:229: error: too few arguments to function ‘cvHaarDetectObjects’

But the function looks fine according to the docs I found on the net.
So, which version of opencv do you use (please also name the specific version you depend on in the Installation file)?

Hope this helps.


No the problem is that 2.2.0, which is the current opencv release, is too new. I got the same errors when I tried to build against 2.2.0 but downgrading to opencv 2.1.0 headtrack builds. The head tracker code should probably be updated to build against either 2.1 or 2.2.

However when I try to run it I get:

Code: Select all
$ ./headtrack
headtrack.c: Created socket. Destination = 127.0.0.1:49405!
Xlib:  extension "RANDR" missing on display ":0".
Sorry, cannot open camera.
OpenCV Error: Null pointer (NULL array pointer is passed) in cvGetMat, file /var/tmp/portage/media-libs/opencv-2.1.0/work/OpenCV-2.1.0/src/cxcore/cxarray.cpp, line 2376
terminate called after throwing an instance of 'cv::Exception'
  what():  /var/tmp/portage/media-libs/opencv-2.1.0/work/OpenCV-2.1.0/src/cxcore/cxarray.cpp:2376: error: (-27) NULL array pointer is passed in function cvGetMat

Aborted


So it can't find my web cam. The web cam is working and I confirmed this by running guvcview. Is there something else that needs to be setup for this to work?
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