Re: Blob Analysis

Hi,

take a look at http://opencvlibrary.sourceforge.net/cvBlobsLib

there is an example on discarding small blobs. You can extend the
library with new blob operators (if you mean this) by deriving new
classes from COperadorBlob.

Hope it helps,

Ricard

PD: the documentation is in catalan (not french) and also in english

--- In OpenCV@xxxxxxxxxxxxxxx, "johnstar006" <johnstar006@...> wrote:
>
> --- In OpenCV@xxxxxxxxxxxxxxx, "rickypetit" <rborras@> wrote:
> >
> > --- In OpenCV@xxxxxxxxxxxxxxx, "ivanhan83" <exxonvald@> wrote:
> > >
> > > Hi everyone,
> > > 
> > > Using CvCam and after some filtering, I've obtained a binary 
> image 
> > > (black BG, white blobs). How do I go about identifying these 
> blobs? 
> > > Basically, I just want to bound each blob with a rectangle. 
> What's an 
> > > effective way to do it? I've tried cvFindContour, the blob 
> library, 
> > > etc, and they all seem to take quite a bit of processing time (I 
> could 
> > > also be implementing it wrongly). I've even tried flood-filling 
> (i.e. 
> > > identify a white pixel and do BFS until you get all the blob, but 
> > > that's slow too). Would really appreciate it if someone could 
> point me 
> > > in the right direction. Thanks a bunch!
> > > 
> > > Ivan
> > >
> > How many images per second do you have to process? Using the blob
> > library we can process up to 15 images per second (12 of 640x480 
> and 3
> > of 1024 * 640 ) (extracting blobs and doing many other things ). We
> > use the library in release version, compiled using the Intel 
> Compiler
> > (v8.0) (the performance increases a lot using Intel's compiler).
> > 
> > Hope it helps, 
> > 
> > Ricard
> >
> 
> Which function to use if we want to filter small blobs in that 
> blobslib?Can we modify or add some new functions to the blobslib?The 
> comments for the functions are in french,can't very understand it.-_-!
>






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