[Insight-users] GradientVectorFlow again

[Yinpeng Jin]

well, as my understanding, the input of GVF is an edge map which can be
generated by any edge detector.
you will need to do it by yourself, or use other edge detetor inside ITK.
and GVF is trying to solve a PDE which has an Laplacian operator, that is
why it has an LaplacianImageFilter inside
which is nothing related to the process of generating edge, it was used to
solve the Laplacian equation.
hope this helps.
Yinpeng.


----- Original Message -----
From: "Lorensen, William E (Research)" <lorensen@crd.ge.com>
To: "'Mathieu Malaterre'" <mmalat@irus.rri.ca>; "'Ting Chen'"
<chenting@graphics.cis.upenn.edu>
Cc: <insight-users@public.kitware.com>
Sent: Wednesday, April 24, 2002 2:58 PM
Subject: RE: [Insight-users] GradientVectorFlow again


> Probably not. I know that Ting Chen is revising this class. Perhaps he can
comment on this,
>
> Bill
>
> -----Original Message-----
> From: Mathieu Malaterre [mailto:mmalat@irus.rri.ca]
> Sent: Wednesday, April 24, 2002 4:04 PM
> To: Lorensen, William E (Research)
> Cc: insight-users@public.kitware.com
> Subject: Re: [Insight-users] GradientVectorFlow again
>
>
> Hi Bill,
>   That was exactly the paper I read:
> On page 6 it is written: (paragraph 3.1 Edge Map)
> "We can use any gray-level or binary edge map defined in the image
processing literature (cf. [9])"
> So I wanted to know if there was any particular reason for choosing a
Laplacian one ?
> thanks
> mat
>
>
> "Lorensen, William E (Research)" wrote:
>
> > I believe that this filter attempts to implement the algotirhm described
in:
> > http://iacl.ece.jhu.edu/pubs/p120.pdf
> >
> > Bill
> >
> > -----Original Message-----
> > From: Mathieu Malaterre [mailto:mmalat@irus.rri.ca]
> > Sent: Wednesday, April 24, 2002 3:33 PM
> > To: insight-users@public.kitware.com
> > Subject: [Insight-users] GradientVectorFlow again
> >
> > Hi all again,
> >   As my first question was not so silly, I can ask this one too:
> >  Why do you choose a LaplacianImageFilter compare to an ImageFilter
(that can let the user choose
> > wether
> > a Canny edge detector, sobel or robert) ?
> > thanks
> > mathieu
> > _______________________________________________
> > Insight-users mailing list
> > Insight-users@public.kitware.com
> > http://public.kitware.com/mailman/listinfo/insight-users
> _______________________________________________
> Insight-users mailing list
> Insight-users@public.kitware.com
> http://public.kitware.com/mailman/listinfo/insight-users
>