[Insight-users] TransformFileReader

[Luis Ibanez]

Hi Vincent,

1) The Transform files are in plain text.

     If you look at them with a text editor you will find
     the name and type of the transform.

     For example, the file:

ITK/Testing/Data/Input/itkAffineTransform00.txt

     contains:

#Insight Transform File V1.0
# Transform 0
Transform: AffineTransform_double_3_3
Parameters: 1 0 0 0 1 0 0 0 1 0 0 0
FixedParameters: 0 0 0



2) If you question is about how to figure out
    at run time, what is the type that the reader
    created, then, you could answer that by using
    dynamic_cast<> as in:

  BaseTransformType::Pointer transform = list->front();

  typedef itk::Affine<float,3>         FloatAffineType;
  typedef itk::Affine<double,3>    DoubleAffineType;

  FloatAffineType * floatAffine =
     dynamic_cast< FloatAffineType * >( transform );

  if( floatAffine != NULL )
    {
    std::cout << "It is float type..." << std::endl;
    }

  DoubleAffineType * doubleAffine =
     dynamic_cast< DoubleAffineType * >( transform );

  if( doubleAffine != NULL )
    {
    std::cout << "It is double type..." << std::endl;
    }




    Luis


--------------------------------------------------------
On Thu, May 12, 2011 at 7:55 AM, Vincent Garcia <vincent.garcia at inria.fr> wrote:
> Hi,
>
> I'm trying to read a transformation from a file and I have a little
> probleme.
> I use the object itk::TransformFileReader to read the file and I get the
> transformation as follow:
>
> typedef  itk::TransformFileReader                TransformReaderType;
> typedef  TransformReaderType::TransformListType  TransformListType;
> typedef  TransformReaderType::TransformType      BaseTransformType;
>
> TransformListType *        list      = reader->GetTransformList();
> BaseTransformType::Pointer transform = list->front();
>
> Using transform->GetNameOfClass(), I know what is the transformation class
> corresponds to the transfom object.
> In my case, it's a AffineTransform. However, how do I know if this transform
> is coded on float or on double?
>
> Thanks,
>
> Vincent Garcia
>
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