[vtkusers] vtkImageReslice using stencil

[E.R]

I did the following steps:

-vtkAppender is connected to vtkImageReslice.
-Appender.SetAppendAxis(2);
-The vtkImageData (of the Volume) 's origin is 0,0,0
-I set the ResliceAxes with an offset in the center (CenterX,CenterY,0) the volume.
-I set Reslice's outspacing same as the volume.
-I set Reslice 's outExtent (0, 511,0,804,0,0)

When i call reslice.SetOutputOriginToDefault(), I get an origin's value like 1.0e+300. Why is that? but I can see  correct the whole image (reslice). (I dont use any vtk Viewer,just taking image's data from the vtkImageReslice and draw them by myself)
if I call reslice.SetOutputOrigin(0,0,0), I can see a black image with only one row of pixels in the top. 
What I am doing wrong?? Miss anything?



--- Στις Τρίτ., 21/09/10, ο/η David Gobbi <david.gobbi at gmail.com> έγραψε:

> Από: David Gobbi <david.gobbi at gmail.com>
> Θέμα: Re: [vtkusers] vtkImageReslice using stencil
> Προς: "E.R" <frantic_tictoc83 at yahoo.gr>
> Κοιν.: vtkusers at vtk.org
> Ημερομηνία: Τρίτη, 21 Σεπτέμβριος 2010, 18:18
> Hi Elias,
> 
> You can make vtkImageReslice clip the data by setting the
> OutputOrigin
> and OutputSpacing to be the same as the input's origin and
> spacing.
> 
> reslice.SetOutputExtent(100, 300, 250, 300, 0, 0);
> reslice.SetOutputOrigin(...same as for the input data...)
> reslice.SetOutputSpacing(...same as for the input data...)
> 
>   David
> 
> 
> 2010/9/21 E.R <frantic_tictoc83 at yahoo.gr>:
> > Sorry!
> > I mean... I cant extract a specific region inside the
> reslice.
> > I only get the whole Reslice..fitted inside this whole
> extent (100, 300, 250, 300, 0, 0).
> >
> > So I used vtkImageClip for that...
> >
> > my code is like this now:
> >
> > reslice.SetOutputExtent(0, 511,0,804,0,0);
> > clip.SetOuputExtent(100, 300, 250, 300, 0, 0);
> > padFilter.SetOutputExtent(0, 511,0,804,0,0);
> >
> > How I can produce the same result without using
> vtkImageClip??
> >
> > --- Στις Δευτ., 20/09/10, ο/η David Gobbi
> <david.gobbi at gmail.com>
> έγραψε:
> >
> >> Από: David Gobbi <david.gobbi at gmail.com>
> >> Θέμα: Re: [vtkusers] vtkImageReslice using
> stencil
> >> Προς: "E.R" <frantic_tictoc83 at yahoo.gr>
> >> Κοιν.: vtkusers at vtk.org
> >> Ημερομηνία: Δευτέρα, 20
> Σεπτέμβριος 2010, 22:00
> >> Hi Elias,
> >>
> >> You don't give enough information in your email. 
> When
> >> you say
> >> "it isn't working", that does not tell me what is
> going
> >> wrong.  Is
> >> the output shifted?  Empty?  Black?  Does it
> >> crash?
> >>
> >>    David
> >>
> >>
> >> 2010/9/20 E.R <frantic_tictoc83 at yahoo.gr>:
> >> > Thank you very much!
> >> >
> >> > How I extract a specific region with
> >> reslice.SetOutputExtent(100, 300, 250, 300, 0, 0)?
> ?
> >> >
> >> > It's not working...Its the same with
> >> reslice.SetOuputExtent(0,200,0,50,0,0)...
> >> >
> >> >
> >> > --- Στις Δευτ., 20/09/10, ο/η David
> Gobbi
> >> <david.gobbi at gmail.com>
> >> έγραψε:
> >> >
> >> >> Από: David Gobbi <david.gobbi at gmail.com>
> >> >> Θέμα: Re: [vtkusers] vtkImageReslice
> using
> >> stencil
> >> >> Προς: "E.R" <frantic_tictoc83 at yahoo.gr>
> >> >> Κοιν.: vtkusers at vtk.org
> >> >> Ημερομηνία: Δευτέρα, 20
> >> Σεπτέμβριος 2010, 17:09
> >> >> Hi Elias,
> >> >>
> >> >> I recommend that you don't use
> vtkImageStencilData
> >> for what
> >> >> you are
> >> >> doing.  Instead, you should first use
> reslice on
> >> just
> >> >> the region, and
> >> >> then pad the output with
> vtkImagePadFilter:
> >> >>
> >> >>
> >>
>  padFilter.SetInputConnection(reslice.GetOutputPort());
> >> >>  reslice.SetOutputExtent(100, 300, 250,
> 300, 0,
> >> 0);
> >> >>  padFilter.SetOutputExtent(0,
> 511,0,804,0,0);
> >> >>
> >> >> With stencils, you cannot easily build a
> >> >> vtkImageStencilData from
> >> >> scratch.  The vtkImageStencilData should
> be only
> >> be
> >> >> produced by a
> >> >> source or filter.
> >> >>
> >> >>   David
> >> >>
> >> >>
> >> >>
> >> >>
> >> >>
> >> >>
> >> >> 2010/9/20 E.R <frantic_tictoc83 at yahoo.gr>:
> >> >> >  I have tried this..but I got a
> memory
> >> >> >  error.."Attempted to read or
> write
> >> protected
> >> >> memory"...
> >> >> >  What I am doing wrong????? :-|
> >> >> >
> >> >> >> --- Στις Δευτ.,
> 20/09/10, ο/η
> >> Jim
> >> >> Peterson <jimcp at cox.net>
> >> >> >> έγραψε:
> >> >> >>
> >> >> >> > Από: Jim Peterson <jimcp at cox.net>
> >> >> >> > Θέμα: Re: [vtkusers]
> >> vtkImageReslice
> >> >> using
> >> >> >> stencil
> >> >> >> > Προς: "E.R" <frantic_tictoc83 at yahoo.gr>
> >> >> >> > Κοιν.: vtkusers at vtk.org
> >> >> >> > Ημερομηνία:
> >> Δευτέρα, 20
> >> >> >> Σεπτέμβριος 2010,
> 15:15
> >> >> >> > Elias,
> >> >> >> > If I read that error
> message
> >> correctly, it
> >> >> sounds
> >> >> >> like
> >> >> >> >
> >> reslice.SetOutputExtent(100,300,250,300,0,0)
> >> >> ;
> >> >> >> > would be accepted. The
> question is
> >> would it
> >> >> be the
> >> >> >> desired
> >> >> >> > result?
> >> >> >> >
> >> >> >> > HTH
> >> >> >> > Jim
> >> >> >> >
> >> >> >> > E.R wrote:
> >> >> >> > > Greetings!!
> >> >> >> > >
> >> >> >> > > I am using
> >> vtkImageReslice.setStencil()
> >> >> to limit
> >> >> >> a
> >> >> >> > specific area.
> >> >> >> > > My code is like that:
> >> >> >> > > vtkImageStencilData
> test = new
> >> >> >> vtkImageStencilData();
> >> >> >> > >
> >> >> >> > > test.SetExtent(100,
> 300, 250,
> >> 300, 0,
> >> >> 0);
> >> >> >> > > 
> reslice.SetStencil(test);
> >> >> >> > > 
> reslice.SetOutputExtent(0,
> >> >> 511,0,804,0,0);
> >> >> >> > >
> >> >> >> > > but I am getting this
> error
> >> message:
> >> >> >> > >
> >> >> >> > > "The update extent
> specified in
> >> the
> >> >> information
> >> >> >> for
> >> >> >> > output port 0 on algorithm
> >> >> >> vtkTrivialProducer(086731A0) is
> 0
> >> >> >> > 511 0 804 0 0, which is
> outside the
> >> whole
> >> >> extent 100
> >> >> >> 300 250
> >> >> >> > 300 0 0."
> >> >> >> > >
> >> >> >> > > What I am doing
> wrong?? How I
> >> ll set the
> >> >> stencil
> >> >> >> > inside my Image bounds?
> >> >> >> > >
> >> >> >> > > thanks in advance!
> >> >> >> > >
> >> >> >> > > Elias
> >> >> >> > >
> >> >> >> > >
> >> >> >> > >
> >> >>
> _______________________________________________
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> >> >> >> > > Please keep messages
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> >> >> >> > >
> >> >> >> >
> >> >> >> >
> >> >> >>
> >> >> >>
> >> >> >>
> >> >> >
> >> >> >
> >> >> >
> >> _______________________________________________
> >> >> > Powered by www.kitware.com
> >> >> >
> >> >> > Visit other Kitware open-source
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> >> >> >
> >> >> > Please keep messages on-topic and
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