[vtkusers] Rotating image data

[Jothy]

I used vtkTransfor mtho rotate a vtkImageData.

Jothy

On Fri, Jul 9, 2010 at 2:52 PM, Lic. José M. Rodriguez Bacallao <
jmrbcu at gmail.com> wrote:

> this may be a silly question:
> 1- which is the correct preffered way to rotate(transform) an image,
> with the camera or with vtkImageReslice?
> 2- does vtkImageReslice change/transform the pixel matrix?
>
>
> On Fri, Jul 9, 2010 at 7:34 AM, Jothy <jothybasu at gmail.com> wrote:
> > Some sort of padding befor rotation should help.
> >
> > Jothy
> >
> > On Fri, Jul 9, 2010 at 12:32 PM, Srinivasa Rao <
> srinivas at rsageventures.com>
> > wrote:
> >>
> >> Hi All,
> >>    I am trying to rotate vtkImageData using vtkTransform and
> >> vtkImageReslice, i used following code to do the job.
> >>
> >> vtkImageData * rotateImage(vtkImageData *data, QPointF center, int
> angle)
> >> {
> >>         vtkTransform *imageTransform = vtkTransform::New();
> >>         imageTransform->PostMultiply();
> >>         imageTransform->Translate(center.x(), center.y(), 0.0);
> >>         imageTransform->RotateZ(angle);
> >>        imageTransform->Translate(-center.x(), -center.y(), 0.0);
> >>         // Now create filter and set previously created transformation
> >>         vtkImageReslice *algo = vtkImageReslice::New();
> >>         algo->SetInput(data);
> >>         algo->SetInformationInput(data);
> >>         algo->SetResliceTransform(imageTransform);
> >>         algo->SetInterpolationModeToLinear();
> >>         algo->Update();
> >>         return algo->GetOutput();
> >> }
> >>
> >> When i try to rotate image data, after rotation the data which is
> outside
> >> the image is getting lost.
> >> Is there a way around to rotate image data without data loss..
> >> thanks in advance.
> >> regards,
> >> srinivas.
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>
> --
> Lic. José M. Rodriguez Bacallao
> Centro de Biofisica Medica
> -----------------------------------------------------------------
> Todos somos muy ignorantes, lo que ocurre es que no todos ignoramos lo
> mismo.
>
> Recuerda: El arca de Noe fue construida por aficionados, el titanic
> por profesionales
> -----------------------------------------------------------------
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