[Insight-users] ResampleImageFilter for itk::VectorImage?

[robert tamburo]

A possible workaround if your application permits:
Use an image of itk::Vector's. Vector has GetNumberOfComponents().

Array and VariableLengthVector have GetNumberOfElements() but
not GetNumberOfComponents()

No such Get function exists for FixedArray, but GetNumberOfComponents() is
defined in RGBPixel

Is there a conceptual difference between GetNumberOfComponents() and
GetNumberOfElements()?

A possible solution:
Fix VariableLengthVector to interface correctly
with VectorResampleImageFilter (and potentially other Vector*Filters) by
renaming GetNumberOfElements to GetNumberOfComponents() and changing

const unsigned int numberOfComponents = PixelType::GetNumberOfComponents();
to
unsigned int numberOfComponents = PixelType::GetNumberOfComponents();

On Thu, Jul 7, 2011 at 3:40 PM, David Doria <daviddoria at gmail.com> wrote:

> On Thu, Jul 7, 2011 at 3:34 PM, Cory Quammen <cquammen at cs.unc.edu> wrote:
> > David,
> >
> > Perhaps you want to add a method GetNumberOfComponents() to
> > VariableLengthVector and see if it works. If it does, this seems like
> > a good addition to make.
> >
> > Thanks,
> > Cory
>
> The problem is that the length of a VariableLengthVector is a member:
>
>  inline unsigned int GetNumberOfElements(void) const
>  { return m_NumElements; }
>
> versus the CovariantVector which has a static function that is called
> from the VectorResampleImageFilter (the error is "cannot call member
> function without object):
>
>  const unsigned int numberOfComponents =
> PixelType::GetNumberOfComponents();
>
> There is also the ::Dimension variable:
>
>  itkStaticConstMacro(Dimension, unsigned int,
>                      TInputImage::PixelType::Dimension);
>
> that is not a member.
>
> Is there an easy fix?
>
> David
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