[vtkusers] vtkImageReslice using stencil

[E.R]

My problem solved!
Thank You, David!

Elias

--- 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, 22:48
> My guess is that you are not building
> the ResliceAxes the right way.
> You want the reslice axes to cause a rotation around the
> center of the
> volume, so you need them to do this:
> 
> 1) shift to the center of the volume
> 2) rotate
> 3) shift back again, the opposite of (1)
> 
> If you have a stack of images, you should set the center to
> (CenterX,
> CenterY, CenterZ), unless you specifically want to rotate
> around a
> point in the first slice.
> 
> The reason that SetOutputOriginToDefault() sets 1e+300 is
> that this
> large value is a flag to reslice that causes it to
> internally compute
> a "best guess" for the origin.  It tries to find an
> origin that will
> display as much of the image as possible, i.e. the
> "Default" causes it
> to a shift the image around in order to get the best view.
> 
>   David
> 
> 
> 2010/9/21 E.R <frantic_tictoc83 at yahoo.gr>:
> >
> > 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
> >> >> >> >> > >
> >> >> >> >> > >
> >> >> >> >> > >
> >> >> >>
> >> _______________________________________________
> >> >> >> >> > > Powered by
> >> www.kitware.com
> >> >> >> >> > >
> >> >> >> >> > > Visit other
> Kitware
> >> open-source
> >> >> projects
> >> >> >> at http://www.kitware.com/opensource/opensource.html
> >> >> >> >> > >
> >> >> >> >> > > Please keep
> messages
> >> on-topic
> >> >> and check
> >> >> >> the VTK
> >> >> >> >> FAQ
> >> >> >> >> > at: http://www.vtk.org/Wiki/VTK_FAQ
> >> >> >> >> > >
> >> >> >> >> > > Follow this
> link to
> >> >> >> subscribe/unsubscribe:
> >> >> >> >> > > http://www.vtk.org/mailman/listinfo/vtkusers
> >> >> >> >> > >
> >> >> >> >> > >
> >> >> >> >> >
> >> >> >> >> >
> >> >> >> >>
> >> >> >> >>
> >> >> >> >>
> >> >> >> >
> >> >> >> >
> >> >> >> >
> >> >>
> _______________________________________________
> >> >> >> > Powered by www.kitware.com
> >> >> >> >
> >> >> >> > Visit other Kitware
> open-source
> >> projects at
> >> >> http://www.kitware.com/opensource/opensource.html
> >> >> >> >
> >> >> >> > Please keep messages
> on-topic and
> >> check the
> >> >> VTK FAQ
> >> >> >> at: http://www.vtk.org/Wiki/VTK_FAQ
> >> >> >> >
> >> >> >> > Follow this link to
> >> subscribe/unsubscribe:
> >> >> >> > http://www.vtk.org/mailman/listinfo/vtkusers
> >> >> >> >
> >> >> >>
> >> >> >
> >> >> >
> >> >> >
> >> >>
> >> >
> >> >
> >> >
> >>
> >
> >
> >
>