[PD] opencv motion tracker external HELP!

Kyle Klipowicz kyleklip at gmail.com
Mon May 28 04:17:02 CEST 2007

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!!!


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 code
> and show me what I am doing wrong.  I have read and followed IOhannes guide on external writing.
> Also, I have looked at the zexy and pdp sorce code in order to learn but still I am not getting it to work.
> 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 installed.
> If you have ploblems installing opencv post and I will be glad to help.
> Thanks,
> Alain
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