[vtkusers] vtkImageChangeInformation changes ScalarType?

[Bill Lorensen]

Are you sure that your ImageChangeInformation is connected to the
Volume16Reader?

Bill


On 2/27/07, Michael Knopke <Michael.Knopke at gmx.de> wrote:
>
> Hi,
>
> I just noticed that using vtkImageChangeInformation in my pipeline always
> changes the ScalarType to double, before the type was unsigned_short
>
> even when calling vtkImageCast->SetOutputScalarTypeToUnsignedShort();
>
> the scalartype is still double. Very Strange.
>
> Code:
>
> v16 = vtkVolume16Reader::New();
>
> v16...extend and spacing
>
> v16->GetOutput()->GetScalarTypeAsString(); // returns unsigned_short
>
> image_Change = vtkImageChangeInformation::New();
> image_Change->CenterImageOn();
>
> image_Change->GetOutput()->GetScalarTypeAsString(); // returns double
>
> image_Cast = vtkImageCast::New();
> image_Cast->SetOutputScalarTypeToUnsignedShort();
>
> image_Cast->GetOutput()->GetScalarTypeAsString(); //returns double???
>
> The reason I use GetOutput() and not as proposed for new standard
> GetOutputPort() is that some classes (like vtkImagePlaneWidget) don't
> support setting a port but use direct access to imageData ( via
> ->SetInput())
>
> So using vtkImageChangeInformation with vtkImagePlaneWidget as input will
> give a wrong reslice (white output) because the datatype changed. Using v16
> directly works.
>
> Regards
>
> Michael
>
>
>
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