I remember looking into pix_blobtracker but I don't remember why I didn't use it. In any case, I wrote a Pd abstraction last weekend which I called nearest-neighbor which I think might do the same thing: it looks for the shortest euclidean distances between blobs of the current frame with blobs of the last frame and reorders the blobs in the matrix accordingly. I made a test patch for tracking 8 blobs --- if pix_multiblob sees less than 8, the abstraction just copies the missing rows from the last frame --- a real kludge I know.<br>
<br>Definitely better ways to do this...and...this code is UGLY...but it is getting the job done for my application at least...<br><br>Attached is the abstraction with test patch (multiblob-test).<br><br>HTH,<br><br>-John<br>
<br><div class="gmail_quote">2011/2/18 Jack <span dir="ltr"><<a href="mailto:jack@rybn.org">jack@rybn.org</a>></span><br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Ah, good to know. I will give it a try.<br>
Thanx.<br>
++<br>
<br>
Jack<br>
<br>
<br>
<br>
Le vendredi 18 février 2011 à 16:11 +0100, IOhannes zmölnig a écrit :<br>
<div><div></div><div class="h5">> On 02/18/2011 02:07 PM, Jack wrote:<br>
> > Do you know if there is an external to track multiblob with a constant<br>
> > ID (the ID doesn't change in the time when two or more blobs move).<br>
> > For example, with [pix_multiblob], the ID of the blob is given by its<br>
> > position relative to the lower left corner (or i'm wrong), so it is not<br>
> > good for my application.<br>
><br>
> there is an abstraction that comes with Gem called [pix_blobtracker]<br>
> that try to label the blobs (based on a least error algorithm)<br>
> it uses iemmatrix, but apart from that, no extra externals are involved.<br>
><br>
> gfmadr<br>
> IOhannes<br>
><br>
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