[Insight-users] convex hull filter?

[kingaza at gmail.com]

Hi Luis,

I want to implement registration opration on kidney image (kidney1.png)
considering patient body's motion, I do segmentation first (kidney2.png). 
and I think it will be more accurate in registration process if I can
make use of the other issues.
so I want such a filter...

regards,
kingaza


On Sat, 08 Jan 2005 21:57:12 -0500, Luis Ibanez <luis.ibanez at kitware.com> wrote:
> 
> Hi Kingaza,
> 
> I'm not aware of any filter in ITK implementing
> the convex-hull of a binary image.
> 
> Still,...
> I don't quite see why would you need
> the convex-hull of a region...
> 
> Regards,
> 
>    Luis
> 
> --------------------------
> kingaza at gmail.com wrote:
> > Hi Luis,
> >
> > thx for your answer, but actually, I really need a convex-hull operation.
> > could you tell me whether there is some filters to implement such an operation?
> > thx for any tips
> >
> > regards,
> > kingaza
> >
> > On Sat, 08 Jan 2005 10:57:54 -0500, Luis Ibanez <luis.ibanez at kitware.com> wrote:
> >
> >>Hi Kingaza,
> >>
> >>You may want to give it a try to the filter:
> >>
> >>       VotingBinaryHoleFillingImageFilter
> >>
> >>http://www.itk.org/Insight/Doxygen/html/classitk_1_1VotingBinaryHoleFillingImageFilter.html
> >>
> >>and
> >>
> >>       VotingBinaryIterativeHoleFillingImageFilter
> >>
> >>http://www.itk.org/Insight/Doxygen/html/classitk_1_1VotingBinaryIterativeHoleFillingImageFilter.html
> >>
> >>The second filter is used for running the first one
> >>for a number of iterations.
> >>
> >>These filters will fill-in holes and cavities in
> >>binary images.
> >>
> >>This is not equivalent to a convex-hull, but...
> >>I doubt that you really need a convex-hull operation.
> >>
> >>It seems that what you need is to remove cavities
> >>from the contour... which is what the HoleFilling
> >>voting filters do.
> >>
> >>Note that you will need a CVS version of ITK since
> >>these filters were added to the toolkit *after* the
> >>release 1.8.
> >>
> >>   Regards,
> >>
> >>     Luis
> >>
> >>------------------------
> >>kingaza at gmail.com wrote:
> >>
> >>
> >>>Hi all
> >>>
> >>>how can i get convex hall from a binary image?
> >>>for example
> >>>0 0 1 1 1 0            ==>       0 0 1 1 1 0
> >>>0 0 0 1 0 0                         0 1 1 1 1 0
> >>>0 0 0 1 0 0                         0 1 1 1 1 0
> >>>0 1 1 1 1 0                         0 1 1 1 1 0
> >>>
> >>>I have tried the filter itkHConvexImageFilter
> >>>but it doesn't work.
> >>>
> >>>regards,
> >>>kingaza
> >>>_______________________________________________
> >>>Insight-users mailing list
> >>>Insight-users at itk.org
> >>>http://www.itk.org/mailman/listinfo/insight-users
> >>>
> >>>
> >>
> >>
> >
> >
> 
>
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