[PD] opencv motion tracker external HELP!

nosehair911 at bellsouth.net nosehair911 at bellsouth.net
Mon May 28 04:54:20 CEST 2007

The Gem stuff is complex and done by people who actually know what they are doing.  All I am trying 
to do is port parts of an already made (and very,very simple to code) library to Pd.  I also have no 
coding experience except for this project. I have never even seen C code before 2 weeks ago, but the 
C code for opencv is easy enough for a noob like me to write an application that calls on those 
libraries.  If you are interested check out my Tracker.cpp code.  The difficult part (for me) is turning that 
code into something Pd can use.  Also since it would require that you compile and install opencv I 
think it would be a pain for the enduser to be included inside Gem. I think most people that use Gem 
are not interested in a blob tracker.  That is why I needed to write my own.  My goal is to use the 
tracker output to control Geos in Gem using iemmatrix and other goodies.
BTW the algorithms for pix_multiblob are way, way over my head(seriously)!
> From: "Kyle Klipowicz" <kyleklip at gmail.com>
> Date: 2007/05/27 Sun PM 10:17:02 EDT
> To: "nosehair911 at bellsouth.net" <nosehair911 at bellsouth.net>
> CC: pd-list at iem.at,  zmoelnig at iem.at
> Subject: Re: [PD] opencv motion tracker external HELP!
> I haven't looked at this yet, and have no external coding experience.
> However, I'm wondering if it would be an easier task to port this
> library to mimic the pix_* objects in Gem? Maybe you could look at the
> Gem source and figure out how to do this. Or better yet, compare the
> code you have here with the pix_multiblob, and try to correct the
> algorithms as was suggested earlier.
> Good luck!!!
> ~Kyle
> On 5/27/07, nosehair911 at bellsouth.net <nosehair911 at bellsouth.net> wrote:
> > For the last 2 weeks I have been trying to write a motion tracking external using the blob motion
> > tracker in opencv.  I had success with writing a program that recieves a path to an avi and motion
> > tracks the blobs and prints their position.  Now I am writing the set of Pd externals using the same
> > code with very little success. I need someone that knows what they are doing to look at my Pd 
> > and show me what I am doing wrong.  I have read and followed IOhannes guide on external 
> > Also, I have looked at the zexy and pdp sorce code in order to learn but still I am not getting it to 
> > The externals are based on the already working code I was able to frankenstein together.  I am
> > calling it FTIR_Tools.  It consist of the following (if I ever get them to work!):
> >
> > 1. FTIR_Cam: detects webcam and sends out frames to outlet.
> > 2. FTIR_VPlayer: reads quicktimes from path and sends out frames to outlet.
> > 3. FTIR_Tracker: tracks blobs, sends out "matrix blob# position" to outlet2 and frames to outlet 1.
> > you can also turn on and off visuals for center point and bounding box.
> > 4. FTIR_Window: displays frames in an X11 window.
> >
> > Please look at my code and show me how to fix it. I am getting nowhere.  In the cvBloblib.zip is the
> > program I put together called Tracker and the code called Tracker.cpp.  If you want to see how it
> > works drag it to terminal and follow it with a path to an .avi. You must have opencv and fink 
> > If you have ploblems installing opencv post and I will be glad to help.
> > Thanks,
> > Alain
> >
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> >
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