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.
‹ Previous Topic | Next Topic ›
Page Index Toggle Pages: 1
multiblob tracking (Read 1325 times)
punchik
multiblob tracking
Nov 29th, 2005, 1:34am  
im interested in multiblob tracking, i would like to analize a public  space  and send the cordinates of the people that are moving to a processing  program  that can make a graphic representation of them.  Do you know if any library for processing support multiblob tracking?
thanx in advance
Back to top
 
 
Ricard
Re: multiblob tracking
Reply #1 - Nov 29th, 2005, 2:09am  
Don't know about "multi"blob, but check out this:

» BlobDetection
by v3ga
Performs the computer vision technique of finding "blobs" in an image.
Back to top
 
WWW  
v3ga
Re: multiblob tracking
Reply #2 - Dec 2nd, 2005, 2:32pm  
The blobDetection library allows to detect blobs on a given frame but not to track them over time.
Back to top
 
site | blog&&
WWW  
savoy
Re: multiblob tracking
Reply #3 - Jan 13th, 2006, 5:30am  
You can also detect blobs by the grassFire algorithm.

http://www.yunsil.com/index.htm?page=2.grassFire

"First, the video feed is binarized to 2D arrays of 'on' and 'off' bits. Then the algorithm recursively searches for the neighbored ‘on’ bits until there is no ‘on’ bit in its neighborhood. Once the function is called, a color index is assigned to all those ‘on’ bits that the function sweeps by. When the function is terminated with no more neighbored ‘on’ bits, the color index is increased for later use. After inspecting through the whole bit-filed, the assigned color indexes are used for coloring each domain. The color indexes are used as keys to find appropriate color values from the predefined look-up table."
- yunsil (yunsil.com)

Once the image is labeled, you can also calculate areas, find edges and centers, analyze eccentricities.
Back to top
 
 
bozaris
Re: multiblob tracking
Reply #4 - Jan 13th, 2006, 11:04am  
I find a multiblob fonction in pure data with gem but in version CVS.
You can test the blob fonction here, http://iem.at/pd/ by installing PD with gem (extra).
I am very interesting by the multiblob.
I find an other source (c#) with exe, http://www.codeproject.com/cs/media/Motion_Detection.asp
excellent.

If you have other information, i am working to developpe the multiblob sloution for PD or Max.

Fred
http://fredalemany.zeblog.com
Back to top
 
 
jw
Re: multiblob tracking
Reply #5 - Jan 20th, 2006, 8:34am  
Hello,

i am using eyesWeb to determine up to 8 blobs, send the coordinates via OSC to processing where the blobs are followed over time...

i posted the prototype sketch and patch in my weblog:
http://www.sport4minus.de/blog/?p=46

try it, you just need to install eyesweb 3.3.0 and the motion analysis library (www.eyesweb.org)

and you need to install the OSC library for processing.

the software is free, but windows only.

jens
http://sport4minus.de
Back to top
 
-> http://sport4minus.de
WWW  
Page Index Toggle Pages: 1
‹ Previous Topic | Next Topic ›