Processing 1.0 - Processing Discourse - Tracking installation BBC big screen Leeds

We closed this forum 18 June 2010. It has served us well since 2005 as the ALPHA forum did before it from 2002 to 2005. New discussions are ongoing at the new URL http://forum.processing.org. You'll need to sign up and get a new user account. We're sorry about that inconvenience, but we think it's better in the long run. The content on this forum will remain online.

Index › Programming Questions & Help › Video Capture, Movie Playback, Vision Libraries › Tracking installation BBC big screen Leeds

‹ Previous Topic | Next Topic ›

Pages: 1

Tracking installation BBC big screen Leeds (Read 1143 times)

jaymz

Tracking installation BBC big screen Leeds
Mar 15^th, 2009, 11:18pm

Hi
Im new to processing, Im trying to create an installation that track people moving across a space and use the information to generate midi messages over OSC.

At the minute it works by frame difference at the minute so it can loose the point of movement some times. I need blob tracking to be smart enough to lock to boxes and remember where people are.

I have a the basic tracking patch with test footage in the link below.
http://www.megaupload.com/?d=RIP8W00A

Many Thanks

RickiG

Re: Tracking installation BBC big screen Leeds
Reply #1 - Mar 19^th, 2009, 10:25am

Hi

I use openCV to something a bit like your project, only I don't have multiple blobs.
I don't know how to keep the openCV or Myron referring to the same blob but I did find out that blurring the image, changing the threshold and converting it to b/w makes it much easier for the software to find movement and removes a lot of the noise:
Code:


  public Blob[] readBlob()
  {
    opencv.read();
    image(opencv.image(), 0, 0);		// RGB image 
    image(opencv.image(OpenCV.MEMORY), 0, h); // image in memory
    opencv.absDiff();
    opencv.threshold(threshold);  //threshold = 80;
    opencv.blur( OpenCV.BLUR, 9 ); 
    image(opencv.image(OpenCV.GRAY), 0, h); // absolute difference image
    noFill();
    stroke(255);
    rect(0, 200, 640, 80);
    Blob[] blob = opencv.blobs( 600, (w * 80) / 3, 1, false, 10);
    opencv.remember();
    return blob;
  } 
}

Not much but hope it helps.

Regards Ricki

sam_mcelhinney

Re: Tracking installation BBC big screen Leeds
Reply #2 - Mar 20^th, 2009, 11:29am

hi jay

i'm working on something similar and have got it working fairly well. it is a bit temperamental however - could do with some refinement.

what i'd really like to do is stitch multiple camera feeds together into one capture in order to cover a wide area accurately. i imagine you will have to do something like this also; especially if you are covering a wide open space.

let me know how you get one and i'll keep posting updates here too.

s

code to follow...

jaymz YaBB Newbies Offline Posts: 5	Re: Tracking installation BBC big screen Leeds Reply #3 - Mar 20^th, 2009, 11:32am cheers guys much appreciated. I will credit anyone who helps on on the day of the event.

sam_mcelhinney YaBB Newbies Offline Posts: 34	Re: Tracking installation BBC big screen Leeds Reply #4 - Mar 20^th, 2009, 11:34am zipped code is here for a short while: or email me for a copy (sam at surfacearchitects.com) http://www.surfacearchitects.com/gfx/TRACKING_TRAILS_CLICK.zip s

sam_mcelhinney YaBB Newbies Offline Posts: 34	Re: Tracking installation BBC big screen Leeds Reply #5 - Mar 20^th, 2009, 11:47am sounds like a fun event jay, be good to hear more about it s

Pages: 1

‹ Previous Topic | Next Topic ›