[SciPy-User] Simple pattern recognition

[Gökhan Sever]

ndimage.label works differently than what I have done here.

Later using find_objects you can get slices for row or column basis. Not
possible to construct a dynamical structure to find objects that are in the
in both axis.

Could you look at the stackoverflow article once again and comment back?

Thanks.

On Mon, Sep 21, 2009 at 12:57 PM, Zachary Pincus <zachary.pincus at yale.edu>wrote:

> I believe that pretty generic connected-component finding is already
> available with scipy.ndimage.label, as David suggested at the
> beginning of the thread...
>
> This function takes a binary array (e.g. zeros where the background
> is, non-zero where foreground is) and outputs an array where each
> connected component of non-background pixels has a unique non-zero
> "label" value.
>
> ndimage.find_objects will then give slices (e.g. bounding boxes) for
> each labeled object (or a subset of them as specified). There are also
> a ton of statistics you can calculate based on the labeled objects --
> look at the entire ndimage.measurements namespace.
>
> Zach
>
> On Sep 21, 2009, at 1:45 PM, Gökhan Sever wrote:
>
> > I asked this question at
> http://stackoverflow.com/questions/1449139/simple-object-recognition
> >  and get lots of nice feedback, and finally I have managed to
> > implement what I wanted.
> >
> > What I was looking for is named "connected component labelling or
> > analysis" for my "connected component extraction"
> >
> > I have put the code (lab2.py) and the image (particles.png) under:
> > http://code.google.com/p/ccnworks/source/browse/#svn/trunk/AtSc450/
> > labs
> >
> > What do you think of improving that code and adding into scipy's
> > ndimage library (like connected_components())  ?
> >
> > Comments and suggestions are welcome :)
> >
> >
> > On Wed, Sep 16, 2009 at 7:22 PM, Gökhan Sever
> > <gokhansever at gmail.com> wrote:
> > Hello all,
> >
> > I want to be able to count predefined simple rectangle shapes on an
> > image as shown like in this one:
> http://img7.imageshack.us/img7/2327/particles.png
> >
> > Which is in my case to count all the blue pixels (they are ice-snow
> > flake shadows in reality) in one of the column.
> >
> > What is the way to automate this task, which library or technique
> > should I study to tackle it.
> >
> > Thanks.
> >
> > --
> > Gökhan
> >
> >
> >
> > --
> > Gökhan
> > _______________________________________________
> > SciPy-User mailing list
> > SciPy-User at scipy.org
> > http://mail.scipy.org/mailman/listinfo/scipy-user
>
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-- 
Gökhan
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